NCLHELP.HLB  —  Event Messages

1  –  csma-cd_station

 o  alignment error

    This event is generated whenever an incoming frame does not
    contain an integral number of octets. This error can be caused
    by several conditions, such as electromagnetic interference, late
    collisions, or improperly set hardware parameters (for example,
    receiver squelch).

 o  carrier check failure

    This event is generated on a transmission that failed, either
    because the data link did not sense the receive carrier signal
    that must accompany transmission of a frame, or because the data
    link did not detect an error. This error indicates a failure
    in either the transmitting or receiving hardware, such as the
    transceiver or transceiver cable.

 o  data overrun

    This event is generated whenever an incoming frame is lost
    because of a hardware resource failure such as insufficient
    hardware buffers or insufficient CPU time.

 o  excessive collision

    This event is generated whenever a transmission fails because the
    medium access algorithm reached the maximum number of allowable
    retransmission attempts resulting from collisions. This error can
    occur when too many systems are trying to transmit at the same
    time or when there are cable problems.

 o  frame check error

    This event is generated whenever an incoming frame fails
    the Frame Check Sequence test. This error can be caused by
    several conditions, such as electromagnetic interference, late
    collisions, or improperly set hardware parameters (for example,
    receiver squelch).

 o  frame too long

    This event is generated whenever a remote system sends a frame
    that exceeds the CSMA/CD MAC maximum length.

 o  late collision

    This event is generated whenever a transmission fails because a
    collision was detected after the allowed window for collisions
    had elapsed. This error indicates either a problem with another
    system's carrier sense or a weak local transmitter.

 o  receive data length error

    This event is generated whenever a remote system sends an 802.3
    frame having a length field value that is not valid for the
    number of octets actually received by the MAC.

 o  unavailable station buffer

    This event is generated whenever an incoming frame is discarded
    because there is no station buffer available to receive it. This
    error indicates a lack of local station buffers; that is, a lack
    of buffers between the cable and the user buffers.

    On OpenVMS, this event is blocked by default.  If you wish to
    unblock this event, you may do so using the NET$EVENT_LOCAL
    script.  For more information about that script, refer to
    HELP NETWORK_MANAGEMENT EVENT_DISPATCHER.

 o  unavailable user buffer

    This event is generated whenever an incoming frame is discarded
    because there is no user buffer queued to the appropriate port
    to receive it. This error indicates a lack of buffers in the
    user process; that is, the buffers supplied by the user for the
    Receive function.

    This event is one that network managers commonly select to be
    blocked.  If you wish to block this event, you may do so using
    the NET$EVENT_LOCAL script.  For more information about that
    script, refer to HELP NETWORK_MANAGEMENT EVENT_DISPATCHER.

 o  unrecognized individual destination pdu

    This event is generated whenever an incoming frame that matches
    an enabled individual MAC address is discarded because the frame
    does not satisfy the filter criteria of any port. This error
    indicates that a remote system is using a protocol that is
    locally unsupported or that the local system has not enabled a
    protocol type, protocol identifier, or LLC SAP address that it
    should have.

 o  unrecognized multicast destination pdu

    This event is generated whenever an incoming frame that matches
    an enabled multicast MAC address is discarded because the frame
    does not satisfy the filter criteria of any port. This error
    indicates that the local system has not enabled an Ethernet
    protocol type, SNAP identifier, or LLC SAP address that it should
    have, or that a remote system is sending traffic that is invalid
    for the combination of multicast and the currently specified
    protocol type, SNAP identifier, or LLC SAP.

    On OpenVMS, this event is blocked by default.  If you wish to
    unblock this event, you may do so using the NET$EVENT_LOCAL
    script.  For more information about that script, refer to
    HELP NETWORK_MANAGEMENT EVENT_DISPATCHER.

2  –  ddcmp link (OpenVMS VAX)

 o  pdu received with header format error

    Generated each time the local station detects invalid fields in a
    received message, even though the message's CRC was correct. The
    errors that can generate this event are:

    o  Invalid select flag

    o  Invalid addr value

    o  Fill fields not zero

    o  Invalid control type or subtype fields

    Arguments:

    address     Specifies the address of the remote station that
                caused the event.
    message     Specifies the message header that contains the error.
    header

 o  selection address error

    Generated each time the controller of a multipoint link
    receives a message that contains an address other than that
    of the currently selected tributary. This event is supported
    only on half-duplex point-to-point links, or if the protocol
    characteristic is set to tributary.

    Arguments:

    current     Specifies the address of the currently selected
    address     tributary station.

    previous    Specifies the address of the previously selected
    address     tributary station.

    received    Specifies the address contained in the received
    address     message.

 o  streaming tributary

    Records potential jamming of a line by a remote station. It is
    generated:

    o  When a remote station exceeds a maximum transmission interval
       without releasing the channel.

    o  When a remote station fails to release a channel after sending
       a message with the select flag set.

    o  When the jamming condition is cleared.

    Arguments:

    previous    Specifies the address of the previously selected
    address     tributary station.

    received    Specifies the address contained in the message

    address     received after transmission should have ended. This
                argument is not present if no message is received.

    type        Specifies the type of jamming that the local station
                detected, or indicates that jamming has now cleared.

                Continued    The remote station continued to send
                transmis-    information after it sent a message with
                sion after   the select flag set.
                deselec-
                tion

                Continued    The remote station continued to send
                transmis-    information after exceeding the maximum
                sion after   transmission interval.
                timeout

                Streaming    A previous streaming tributary error has
                cleared      been cleared.

                Streaming    The remote station continued to send
                tributary    valid control messages or headers to
                             data message after exceeding the maximum
                             transmission interval.

2.1  –  logical_station

 o  buffer too small

    Generated each time a message is received whose data field is
    larger than the buffers available on the local station.

    Arguments:

    buffer      Specifies the size of the receive buffer at the local
    size        station.

    count       Specifies the size of the received data message as
                specified in the message header.

 o  locally initiated state change

    Generated each time the state of the local station changes as a
    result of action on the local node.

    Arguments:

    new state   New value of the logical station's protocol state
                attribute.

    old state   Previous value of the logical station's protocol
                state attribute.

 o  receive error threshold reached

    Generated each time the number of consecutive receive-related
    errors reaches the receive error threshold limit of 7.

 o  remotely initiated state change

    Generated each time the state of the link changes as a result of
    action on the remote node.

    Arguments:

    new state   New value of the logical station's protocol state
                attribute.

    old state   Previous value of the logical station's protocol
                state attribute.

 o  selection error threshold reached

    This event is generated each time the number of consecutive
    selection-related errors reaches the selection error threshold
    limit of 7. This event is supported only when the protocol
    characteristic of the owning ddcmp link entity is set to control,
    or when the link is half-duplex point-to-point.

 o  send error threshold reached

    This event is generated each time the number of consecutive
    transmit related errors reaches the transmit error threshold
    limit of 7.

 o  strt received while in maintenance

    This event is generated each time a strt message is received
    while the value of the status attribute protocol state of the
    local station is set to maintenance.

3  –  device_unit

 o  device failure

    Generated each time a failure is detected on a device.

    Arguments:

    failure     Reason for the device failure. The values of this
    reason      argument are implementation specific.

    firmware    Identifier of the device's microcode.
    identifier

    next state  Next state of the device. This depends on the values
                of the auto load and dump on error characteristics.
                dumping      The entity will try to dump the device's
                             microcode.
                loading      The entity will try to load the device's
                             microcode.
                stopped      The entity will stop, awaiting a dump or
                             load command.

 o  failed dump

    Generated each time there is a failure to dump the device's
    microcode.

    Arguments:

    dump des-   Destination that the dump operation used.
    tination

    dump        Reason for the dump failure.
    reason
                directive    In response to a dump command.
                failure      In response to a device failure while in
                             the running state.
    failure     Reason why the dump failed. The values of this
    reason      argument are device specific.

 o  failed load

    Generated each time there is a failure to load the device's
    microcode.

    Arguments:

    failure     Reason for the load failure. The values of this
    reason      argument are device dependent.

    load        Reason for the load operation.
    reason
                directive    In response to a load command.
                dump         After completion of a dump operation.
                failure      After a device failure.
                initial      Initial loading of the device at device
                             unit enable when auto load is true.
    load        Source used to retrieve the microcode during the load
    source      operation.

 o  successful load

    Generated each time the device's microcode is successfully
    loaded.

    Arguments:

    firmware    Firmware identifier of the loaded microcode.
    identifier

    load        Reason for the load operation.
    reason
                directive    In response to a load command.
                dump         After completion of a dump operation.
                failure      After a device failure.
                initial      Initial loading of the device at device
                             unit enable when auto load is true.
    load        Source used to retrieve the microcode during the load
    source      operation.

4  –  dtss

 o  clock set

    This event is generated each time that a DECdts process sets its
    local clock.  Arguments:

    new time      Specifies the corrected clock setting.

    old time      Specifies the faulty time before the clock was set.

 o  different epoch detected

    This event is generated each time the local node receives a time
    value that has an epoch number different from its own. This event
    normally occurs after a node's epoch has been changed.  Arguments:

    local epoch   Specifies the local node's epoch number.
    number

    server [id]   Specifies the known servers and their epoch numbers.

 o  disable completed

    This event is generated each time that a disable command is
    executed to stop DECdts.

 o  enable completed

    This event is generated each time that an enable command is
    executed to start DECdts.

 o  epoch change completed

    This event is generated each time that the epoch is set for the
    local node.  Arguments:

    new epoch     Specifies the epoch number after the epoch was
                  declared.

    old epoch     Specifies the epoch number before the epoch was
                  declared.

 o  insufficient resources detected

    This event is generated each time that the node's virtual memory
    is full. The event is displayed on all nodes and is usually
    followed by a system abort.

 o  invalid message detected

    This event is generated each time that the local node receives
    a corrupted or incorrect message. Invalid messages are normally
    retransmitted, but the hexadecimal contents of the invalid message
    are supplied for troubleshooting.  Arguments:

    message       Specifies the hexadecimal contents of the invalid
                  message.

    node [id]     Specifies the full name of the node that generated
                  the invalid message.

 o  local time does not intersect

    This event is generated each time that the time interval of the
    local node does not intersect with the values received from other
    servers. If this event is frequently generated, you may wish to
    decrease the setting for the characteristic synchronization hold down
    or increase the settings for the characteristics error tolerance or
    maximum inaccuracy.  Arguments:

    clock set     Specifies whether or not the clock was automatically
                  set to correct the local fault. If false, the clock
                  was not set to correct the local fault.

    computed      Specifies the intersection of the majority of server
    time          times.

    local time    Specifies the local time interval that does
                  not intersect with the computed time.

 o  no global server

    This event is generated at a courier server when it cannot locate
    a global server.

 o  protocol version mismatch detected

    This event is generated each time that the DECdts protocol version
    of a received message does not match the protocol in force at the
    local node.  Argument:

    node [id]     Specifies the full name of the node that generated
                  the message with the incompatible protocol version.

 o  server not responding

    This event is generated at a courier server when it attempts to
    synchronize with the listed global server, but the server does not
    respond. The event may be caused by a low characteristic setting
    for wan timeout.  Argument:

    node [id]     Specifies the node name of the server not responding.

 o  server time does not intersect

    This event is generated each time that the local node receives a
    potentially faulty time value from a server. If the event is
    repeatedly generated for the same node, examine the node's
    settings for these characteristics: error tolerance,
    synchronization hold down, and maximum inaccuracy.  Argument:

    server [id]   Specifies the list of servers used in the
                  synchronization.

 o  synchronization completed

    This event is generated each time that a synchronization is
    completed for the local node.  Arguments:

    clock         Specifies the relative time that the local clock
    adjustment    needs to be adjusted to match the computed time.

    computed      Specifies the time computed from the intersection of
    time          all server time intervals.

    This event is one that network managers commonly select to be
    blocked.  If you wish to block this event, you may do so using
    the NET$EVENT_LOCAL script.  For more information about that
    script, refer to HELP NETWORK_MANAGEMENT EVENT_DISPATCHER.

 o  system error detected

    This event is generated each time that the operating system
    has a system error relevant to DECdts operation. See the system
    documentation for an explanation of the report text.  Argument:

    error text    Specifies the system error report.

 o  time provider failure detected

    This event is generated each time that an external time provider
    returns an invalid time or does not respond.

 o  time representation version mismatch detected

    This event is generated each time that the local node receives
    a response indicating that it is using an invalid time
    representation version.  Argument:

    node [id]     Specifies the name of the node that is running the
                  incompatible time representation version.

 o  too few servers detected

    This event is generated each time that the number of servers
    specified by the servers required characteristic are not available
    for synchronization with the local node.  Arguments:

    number        Specifies the number of servers that responded to
    detected      the synchronization request.

    number        Specifies the number of servers required for
    required      synchronization.

 o  too many servers detected

    This event is generated each time that server responses overflow
    the synchronization list buffer of the local node. The difference
    between the maximum delivered and number accepted arguments is the
    number of responses that overflowed the buffer.  Arguments:

    number        Specifies the number of server responses that were
    accepted      accepted by the node.

    number        Specifies the number of servers responding to a
    detected      solicitation.

 o  update initiated

    This event confirms an attempt to change the system time resulting
    from the update command.  Arguments:

    current time  Specifies the current system time.

    update time   Specifies the new, updated system time.

5  –  event_dispatcher

 o  events lost

    Generated whenever the event dispatcher cannot allocate resources
    to queue more events for processing. The event-logging function
    guarantees that this event cannot be lost. Also, you cannot block
    this event unless all events for all modules are blocked.

    This event is placed at the end of the queue. If another event
    cannot be queued because of resource limitations while this event
    is still the last event in the queue, the number argument is
    updated to reflect the latest total of lost events.  Argument:

    number         Number of consecutive events lost.

 o  test requested

    Logged when the test directive is issued.

5.1  –  outbound_stream

 o  change confidence

    Generated each time the transport service detects a change in the
    connection's confidence value. (The confidence value indicates
    whether the Transport layer expects a transmit operation to
    succeed.) This event suggests a change in the connectivity
    between the outbound stream and the sink.   Argument:

    confidence      New transport confidence value.

    false           It is unlikely that a transmit operation would
                    succeed under the current circumstances.

    true            It is likely that a transmit operation would
                    succeed under the current circumstances.

 o  change filter

    Generated each time that the filter for a stream is changed,
    whether it is changed by a block, ignore, or pass command
    or by using set to change the value of the catch all filter
    characteristic. The initial values of the filters for a stream
    are reported as arguments in the enable stream event. A filter
    change event is filtered according to its new values.

    Arguments: (OpenVMS)

    new catch   Specifies the current catch all filter setting.
    all filter

    new global  Specifies the current global filter setting.
    filter

    new         Specifies the current specific filter setting.
    specific
    filter

    old catch   Specifies the previous catch all filter setting.
    all filter

    old global  Specifies the previous global filter setting.
    filter

    old         Specifies the previous specific filter setting.
    specific
    filter

 o  disable

    Generated each time an outbound stream is disabled by a disable
    command.

 o  disconnect

    Generated each time a connection is closed on an outbound stream.
    The disconnect can be caused by the event dispatcher closing
    idle connections, a management command, a network failure, a sink
    crash, or a sink disconnect.  Arguments:

    disconnect   Identifies the cause of the disconnect.
    data
                 0   remote disconnect
                 2   shutdown requested (OpenVMS)
                 3   management directive

    reason       Session Control layer reason for the disconnect.

 o  enable

    Generated each time an outbound stream is enabled by an enable
    command.  Arguments:

    catch all   Value of the catch all filter when the stream is
    filter      enabled.

    global      Value of the global filter when the stream is
    filter      enabled.
    (optional)

    specific    Value of the specific filter when the stream is
    filter      enabled.
    (optional)

 o  events lost

    Generated whenever the outbound stream cannot allocate resources
    for event transmission. The event-logging function guarantees
    that this event cannot be lost. Also, you cannot block this event
    unless all events for all modules are blocked.

    This event is placed at the end of the queue. If another event
    cannot be queued because of resource limitations while this event
    is still the last event in the queue, the number argument is
    updated to reflect the latest total of lost events.  Argument:

    number      Number of consecutive events lost.

 o  shutdown

    Generated each time that a shutdown operation results in an
    orderly disconnect. You cannot block shutdown events for an
    outbound stream.

    Arguments:

    reason      cancelled    The shutdown was "neutralized" by an
                             intervening disconnect; therefore, the
                             receiver should not shut down.

                disconnect   The shutdown was caused by the
                timer        disconnect timer.

                disable      The shutdown was caused by a disable
                directive    command that specified an orderly
                             shutdown.

                shutdown     The shutdown was caused by a shutdown
                directive    command.

5.2  –  relay_logging

 o  event relayed

    Generated whenever a Phase IV event is received. It relays the
    Phase IV event into the DECnet-Plus Event Logging Architecture.
    The entire DECnet NICE message is encapsulated into the NICE
    data argument.  Argument:

    NICE data      Phase IV event display

5.3  –  sink

 o  change filter

    Generated each time that the filter for a sink is changed,
    whether it is changed by a block, ignore, or pass command
    or by using set to change the value of the catch all filter
    characteristic. The intitial values of the filters for a sink
    may be reported as arguments in the enable sink event. A filter
    change event is filtered according to its new values.

    Arguments: (OpenVMS)

    new catch   Current catch all filter setting.
    all filter

    new global  Current global filter setting.
    filter

    new         Current specific filter setting.
    specific
    filter

    old catch   Previous catch all filter setting.
    all filter

    old global  Previous global filter setting.
    filter

    old         Previous specific filter setting.
    specific
    filter

 o  events lost

    Generated whenever the sink cannot allocate resources for event
    transmission. The event-logging function guarantees that this
    event cannot be lost. Also, you cannot block this event unless
    all events for all modules are blocked.

    This event is placed at the end of the queue. If another event
    cannot be queued because of resource limitations while this event
    is still the last event in the queue, the number argument is
    updated to reflect the latest total of lost events.   Argument:

    number      Number of consecutive events lost.

5.3.1  –  inbound_stream

 o  change confidence

    Generate when the underlying transport service detects that the
    connection's confidence variable has changed to the new value
    reported by the confidence parameter. This suggests a change in
    the connectivity between the outbound stream and the sink.
    Argument:

    confidence  Specifies the new transport confidence value.

    false       It is unlikely that a transmit operation would
                succeed under the current circumstances.

    true        It is likely that a transmit operation would
                succeed under the current circumstances.

 o  disconnect

    Generated each time the sink detects that an inbound stream
    connection has been closed. The disconnect can be caused by a
    management command, a sink disconnect, a network failure, or by
    receiving notice that the associated outbound stream entity has
    been shut down.  Arguments:

    disconnect  Identifies the cause of the disconnect.
    data

    reason      Specifies the Session Control layer reason for the
                disconnect.

    shutdown    Inbound stream disconnected because of a shutdown
    received    event.

6  –  fddi_station

 o  configuration change

    Internal configuration of the station changed.

 o  selftest failure

    An implementation specific code giving the reason for the station
    failure. Values are listed in the DNA registry.

 o  trace received

    ECM state machine of the station entered the trace state due to a
    trace signal received on any PHY port.

6.1  –  link

 o  block check error

    Frame with FCS error was received.

    On OpenVMS, this event cannot be logged due to VMS device driver
    restrictions.  However, if such an event occurs, its corresponding
    counter will be incremented.

 o  directed beacon received

    A directed beacon was received.

    On OpenVMS, this event cannot be logged due to VMS device driver
    restrictions.  However, if such an event occurs, its corresponding
    counter will be incremented.

 o  duplicate address test failure

    Duplicate address algorithm detected a duplicate.

    On OpenVMS, this event cannot be logged due to VMS device driver
    restrictions.  However, if such an event occurs, its corresponding
    counter will be incremented.

 o  duplicate token detected

    Duplicate token is detected.

    On OpenVMS, this event cannot be logged due to VMS device driver
    restrictions.  However, if such an event occurs, its corresponding
    counter will be incremented.

 o  fci strip error

    Frame content independent strip was terminated by a token.

    On OpenVMS, this event cannot be logged due to VMS device driver
    restrictions.  However, if such an event occurs, its corresponding
    counter will be incremented.

 o  frame status error

    Frame with good FCS, but E indicator set was received.

    On OpenVMS, this event cannot be logged due to VMS device driver
    restrictions.  However, if such an event occurs, its corresponding
    counter will be incremented.

 o  link buffer unavailable

    No buffer was available to to receive a frame.

    On OpenVMS, this event cannot be logged due to VMS device driver
    restrictions.  However, if such an event occurs, its corresponding
    counter will be incremented.

 o  pdu length error

    Frame of invalid length or odd number of symbols was received.

    On OpenVMS, this event cannot be logged due to VMS device driver
    restrictions.  However, if such an event occurs, its corresponding
    counter will be incremented.

 o  receive data overrun

    A receive overrun hardware error was detected.

    On OpenVMS, this event cannot be logged due to VMS device driver
    restrictions.  However, if such an event occurs, its corresponding
    counter will be incremented.

 o  ring beacon initiated

    Link started the beacon process.

    On OpenVMS, this event cannot be logged due to VMS device driver
    restrictions.  However, if such an event occurs, its corresponding
    counter will be incremented.

 o  ring initialization initiated

    Ring is reinitialized by this link.

    On OpenVMS, this event can only be logged by certain versions of
    the VMS device drivers.  Even in those cases where the drivers
    support this event, it will not be logged on a one-to-one basis
    with increases in its corresponding counter.  Instead, only one
    error report will be issued for any number of these events that
    occur within a sampling period.  This is intended to prevent the
    possibility of flooding OPCOM with these events.

 o  ring initialization received

    Ring is reinitialized by some other link.

    On OpenVMS, this event can only be logged by certain versions of
    the VMS device drivers.  Even in those cases where the drivers
    support this event, it will not be logged on a one-to-one basis
    with increases in its corresponding counter.  Instead, only one
    error report will be issued for any number of these events that
    occur within a sampling period.  This is intended to prevent the
    possibility of flooding OPCOM with these events.

 o  ring purge error

    Ring purger received a token while purging.

    On OpenVMS, this event cannot be logged due to VMS device driver
    restrictions.  However, if such an event occurs, its corresponding
    counter will be incremented.

 o  trace initiated

    PC-trace was initiated by this link.

    On OpenVMS, this event cannot be logged due to VMS device driver
    restrictions.  However, if such an event occurs, its corresponding
    counter will be incremented.

 o  transmit failure

    Failure to transmit operation other than underrun.

    On OpenVMS, this event cannot be logged due to VMS device driver
    restrictions.  However, if such an event occurs, its corresponding
    counter will be incremented.

 o  transmit underrun

    Transmit failed due to underrun.

    On OpenVMS, this event cannot be logged due to VMS device driver
    restrictions.  However, if such an event occurs, its corresponding
    counter will be incremented.

 o  unrecognized individual pdu destination

    Frame with unrecognized DSAP or port-id.

 o  unrecognized multicast pdu destination

    Frame with unrecognized DSAP or port-id.

    On OpenVMS, this event is blocked by default.  If you wish to
    unblock this event, you may do so using the NET$EVENT_LOCAL
    script.  For more information about that script, refer to
    HELP NETWORK_MANAGEMENT EVENT_DISPATCHER.

 o  user buffer unavailable

    Data link user did not supply a receive buffer.

6.2  –  phy_port

 o  link confidence test reject

    Counted as LCT rejects.

 o  link elasticity buffer error

    Counted as elasticity buffer errors.

 o  link error monitor reject

    Counted as LEM rejects.

7  –  hdlc_link

 o  buffer unavailable error

    Generated each time a frame is discarded because there is no
    receive buffer available.

 o  link down

    Generated each time the entity is disabled.

 o  link up

    Generated each time the entity is enabled.

 o  pdu receive overrun

    Generated each time the Physical layer entity reports a receive
    overrun.

 o  pdu transmit failed

    Generated each time an attempt to send a frame fails.  Argument:

    pdu transmit   Failure reason received from the Physical layer
    failed         entity.
    reason
                   disabled    The network manager has disabled the
                               line.

                   line down   The line is in the failed state.

                   no service  The Physical layer service is not
                               available.

7.1  –  logical_station

 o  frmr generated

    Generated each time the logical station rejected a received
    frame.  Arguments:

    frmr        Contents of the frame reject frame that is returned
                to the remote station.

    frmr        Reason for rejecting the frame.
    reason
                control      One of the control fields is undefined
                             or not implemented by the local station.

                format       The frame's control field is invalid
                             because the frame contained information
                             that is not allowed, the frame is
                             supervisory, or the frame is unnumbered
                             and has the wrong length.

                length       The information field of the frame
                             exceeds the maximum capacity.

                nonspecific  The received frame contains an
                             unspecified number or type of error.

                nr           The frame's control field contains an
                             invalid N(R).

    received    Header of the frame that caused the generation of the
    pdu         event.

 o  frmr received

    Generated each time the remote station rejected a frame.
    Arguments:

    frmr        Contents of the frame reject frame that is returned
                to the remote station.

    frmr        Reason for rejecting the frame.
    reason
                control      One of the control fields is undefined
                             or not implemented by the local station.

                format       The frame's control field is invalid
                             because the frame contained information
                             that is not allowed, the frame is
                             supervisory, or the frame is unnumbered
                             and has the wrong length.

                length       The information field of the frame
                             exceeds the maximum capacity.

                nonspecific  The received frame contains an
                             unspecified number or type of error.

                nr           The frame's control field contains an
                             invalid N(R).

    received    Received FRMR that caused the generation of the
    pdu         event.

 o  negotiation failed

    Generated each time XID negotiation fails.  Arguments:

    negotiation Reason that negotiation with the remote station
    failure     failed.
    reason
                address id   The preferred addresses and the address-
                not unique   negotiation unique IDs were identical.

                incompatible The remote station wanted to use HDLC's
                address      extended addressing which the Digital
                modes        Network Architecture's implementation
                             does not support.

                incompatible Incompatible  CRC types were specified by
                crc types    the two stations.

                incompatible Incompatible  sequence moduli were
                sequence     specified by the two stations.
                moduli

                link type    There has been an attempt to initialize
                mismatch     using classes of procedures that are not
                             appropriate for the specified link type.

                maximum      The negotiated maximum frame size
                pdu size     is less than the value of the hdlc
                too small    link entity's minimum data size
                             characteristic.

                negotiation  The remote station performed an illegal
                error        negotiation operation.

                no           There has been no valid reponse from
                response     the remote station to the generated XID
                             within the number of times specified
                             by the hdlc link entity's retry maximum
                             characteristic.

                parameter    The parameter IDs that should be unique
                id not       are not so.
                unique

                protocol     An attempt has been made to initialize
                id           sequenced data ports with different
                mismatch     protocol IDs.

                transmission Mismatch  in the sync/async bit in the
                type         XID.
                mismatch

                ui not       An attempt has been made to initialize
                supported    without the UI optional function, which
                             is required when running MOP over an
                             HDLC link.

    local xid   The XID that the local station used during the failed
                negotiation.

    remote xid  The XID that the remote station used (if any) during
                the failed negotiation.

 o  station halted

    Generated each time the logical station's status attribute
    protocol state becomes halted.  Argument:

    station     Reason for the logical station to halt its protocol.
    halted
    reason
                disc         A DISC frame was received from the
                             remote station.

                dm           A DM frame was received from the remote
                             station.

                fbit error   A frame was received from the remote
                             station with an error in the F-bit.

                frmr         An FRMR frame was received from the
                             remote station.

                local        The initialization was as a result of
                             the enable command.

                maximum      The number of times that a frame has
                retry        been sent has exceeded the value of
                             the hdlc link entity's retry maximum
                             characteristic.

                physical     There was a failure in the Physical
                             layer.

                unsolicited  An unsolicited UA frame was received
                ua           from the remote station.

                user         The initialization was as a result of
                             local user action.

                window       The initialization occurred as part of
                error        the recovery from a windowing error.

 o  station initializing

    Generated each time the logical station's protocol is
    successfully initialized or reinitialized.

    Argument:

    station     Reason for the logical station to initialize its
    initial-    protocol.
    izing
    reason
                disc         A DISC frame was received from the
                             remote station.

                dm           A DM frame was received from the remote
                             station.

                fbit error   A frame was received from the remote
                             station with an error in the F-bit.

                frmr         An FRMR frame was received from the
                             remote station.

                local        The initialization was as a result of
                             the enable command.

                maximum      The number of times that a frame has
                retry        been sent has exceeded the value of
                             the hdlc link entity's retry maximum
                             characteristic.

                physical     There was a failure in the Physical
                             layer.

                unsolicited  An unsolicited UA frame was received
                ua           from the remote station.

                user         The initialization was as a result of
                             local user action.

                window       The initialization occurred as part of
                error        the recovery from a windowing error.

                xid          An XID frame was received from the
                             remote station.

 o  station inoperative

    Generated each time the status attribute protocol state becomes
    inoperative.

 o  station maintenance

    Generated each time the status attribute protocol state becomes
    maintenance.

 o  station resetting

    Generated each time the status attribute protocol state becomes
    resetting.  Argument:

    station     Reason for the logical station to perform a reset
    resetting   operation.
    reason
                fbit error   A frame was received from the remote
                             station with an error in the F-bit.

                frmr         An FRMR frame was received from the
                             remote station.

                maximum      The number of times that a frame has
                retry        been sent has exceeded the value of the
                             entity's retry maximum characteristic.

                sabm         A SABM frame was received from the
                             remote station.

                unsolicited  An unsolicited UA frame was received
                ua           from the remote station.

                window       The initialization occurred as part of
                error        the recovery from a windowing error.

 o  station running

    Generated each time the logical station's protocol has been
    successfully initialized. In addition, the status attribute
    protocol state changes to running.

 o  station setup failed

    Generated each time the logical station's protocol fails to be
    initialized following either:

    o  The expiration of the entity's maximum retry characteristic
       when in the initializing state

    o  A forced disconnection from the remote station

 o  unknown ui pdu received

    Generated each time an unsequenced frame is received specifying a
    protocol ID to which a port has not been opened on this station.
    Argument:

    received    Received UI frame which caused this event to be
    pdu         generated.

8  –  lapb_link

 o  buffer unavailable error (OpenVMS)

    Generated when a frame is discarded because there is no buffer
    available.

 o  frmr received

    Generated when an FRMR (frame reject) frame is received from the
    remote station.   Arguments:

    frmr        Contents of the header of the FRMR frame.

    frmr        Reason why the FRMR frame was generated. See possible
    reason      reasons described under the frame reject generated
                event.

 o  frmr sent

    Generated when the receipt of a frame causes an FRMR (frame
    reject) frame to be generated and transmitted to the remote
    station. Arguments:

    received    Header of the frame that caused the event to be
    pdu         generated.

    frmr        Contents of the generated FRMR frame.

    frmr        Reason why the FRMR frame was generated.
    reason
                control      A received control field is either
                             undefined or is not implemented.

                format       The received control field is invalid
                             either because the frame contained an
                             unallowed information field, or because
                             the frame is a supervisory or unnumbered
                             frame of incorrect length.

                length       The received information field is longer
                             than the maximum established capacity.

                nonspecific  The received frame has an unspecified
                             number or types of errors.

                nr           The received control field contains an
                             invalid N(R).

 o  link halted

    Generated when the status attribute protocol state is set to
    halted.  Argument:

    link        Reason why the LAPB protocol entered the halted
    halted      state.
    reason
                disc           Link halt caused by remote end.

                dm             Link halt caused by remote end.

                fbit error     Link halt caused by remote end.

                frmr           Link halt caused by remote end.

                implementation Link halt caused by implementation-
                specific       specific error.

                local          Link halt due to local management
                               action.

                maximum        Link halt due to the number of retries
                retry          reaching the maximum specified in the
                               characteristic retry maximum.

                physical       Link halt due to failure of the Physical
                               Layer.

                unsolicited ua Link halt caused by remote end.

                user           Initialization was result of local user
                               action.

                window         Link halt caused by remote end.
                error

 o  link initializing

    Generated when the protocol has been successfully initialized or
    reinitialized.  Argument:

    link ini-   Reason why the LAPB protocol entered the initializing
    tializing   state.
    reason
                The reasons are the same as described for the link
                halted reason argument for the link halted event.

 o  link inoperative

    Generated when the status attribute protocol state is set to
    inoperative.

 o  link maintenance

    Generated when the status attribute protocol state is set to
    maintenance.

 o  link resetting

    Generated when the LAPB protocol is being successfully reset.
    Argument:

    link        Reason why the link is resetting.
    resetting
    reason
                fbit error     Link reset caused by remote end.

                frmr           Link reset caused by remote end.

                implementation Link reset is due to implementation-
                specific       specific error.

                maximum        Link reset due to the number of retries
                retry          reaching the value specified in the
                               characteristic retry maximum.

                sabm           Link reset caused by remote end.

                unsolicited ua Link reset caused by remote end.

                window         Link reset caused by remote end.
                error

 o  link running

    Generated when the LAPB protocol has been successfully
    initialized and the status attribute protocol state has been
    set to running.

 o  link setup failed

    Generated when the LAPB protocol has failed to initialize
    correctly after the maximum number of allowed attempts.

 o  link state changed

    Generated for each link state transition. The link state shows
    the new link state.  Argument:

    final state      The new setting of the state attribute (on or off).

 o  pdu receive overrun

    Generated each time the underlying physical layer indicates that
    a receive overrun has been detected.

 o  pdu transmit failed

    Generated when a call to transmit a frame at the Physical layer
    via the internal framing interface fails.  Argument:

    pdu         Failure reason returned by the Physical layer.
    transmit
    failure
    reason
                disabled     The line has been disabled by network
                             management action.

                line down    The line is in the failed state.

                no service   The Physical layer service is not
                             available.

9  –  llc2_sap

 o  sap state changed

    This event is generated when the status attribute STATE changes
    from On to Off, or from Off to On.  Argument:

    New SAP State   Specifies the new state of the SAP.

9.1  –  link

 o  frame reject generated

    This event is generated when the receipt of a frame causes an FRMR
    (frame reject) frame to be generated and transmitted to the remote
    station.  Arguments:

    frame         Specifies the contents of the header of the frame
                  that caused the FRMR frame to be generated.

    frame reject  Specifies why the FRMR frame was rejected.
    reason

                  control      A received control field is undefined
                               or is not implemented.

                  format       The frame contains an unallowed
                               information field, or contains a
                               supervisory or unnumbered field of
                               incorrect length.

                  length       A received information field exceeds
                               the maximum length.

                  nr           A received control field contains an
                               invalid n(r).

                  ns           A received control field contains an
                               invalid n(s).

                  nonspecific  The frame contains an unspecified
                               number or type of errors.

    generated     Specifies the contents of the generated frmr frame
    frmr          that is sent to the remote station.

 o  frame reject received

    This event is generated when an FRMR (frame reject) frame is
    received from the remote station.  Arguments:

    frame         Specifies the contents of the header of the
                  received FRMR frame.

    frame reject  Specifies why the frame was rejected. See possible
    reason        reasons described under the Frame Reject Reason
                  argument of the Frame Reject Generated event.

 o  link halted

    This event is generated when the status attribute protocol state
    is set to halted.  Argument:

    link halted     Specifies why the protocol halted.
    reason

                    disc             A DISC frame was received. The
                                     remote end has disconnected the
                                     link.

                    dm               A DM frame was received. The
                                     remote end has disconnected the
                                     link.

                    frmr             A FRMR frame was received. The
                                     remote end has detected a frame
                                     error.

                    implementation   The cause is unknown.
                    Specific

                    lan              The LAN station has failed.

                    local            Local management action on the
                                     sap or link entities has halted
                                     the link.

                    maximum retry    A PDU had to be retransmitted
                                     the maximum number of times
                                     without response from the remote
                                     end.

                    User             Local client action has halted
                                     the link.

 o  link initializing

    This event is generated when the protocol has been successfully
    initialized or reinitialized.  Argument:

    link initializing  Specifies why the protocol was initialized or
    reason             reinitialized. See possible reasons described
                       under the Link Halted Reason argument of the
                       link halted event.

 o  link inoperative

    This event is generated when the status attribute protocol state
    is set to inoperative.

 o  link resetting

    This event is generated when the status attribute protocol state
    is set to resetting.  Argument:

    link          Specifies why the protocol is being reset.
    resetting
    reason

                  frmr             A FRMR frame was received. The
                                   remote end has detected a frame
                                   error.

                  implementation   The reason is unknown.
                  specific

                  maximum retry    A PDU had to be retransmitted the
                                   maximum number of times without
                                   response from the remote end.

                  sabme            A SABME frame was received. The
                                   remote end has reset the link.

 o  link running

    This event is generated when the status attribute protocol
    state is set to Running. This means that the protocol has been
    successfully initialized or reset.

 o  link setup failure

    This event is generated when llc2 protocol initialization has
    failed after the maximum number of retries.

 o  link state changed

    This event is generated when the status attribute state changes
    from On to Off, or from Off to On.

10  –  modem_connect_line

 o  cable detected

    Generated when a valid communication cable is detected following a
    cable fault event.  Arguments:

    current       Type of cable detected.
    interface
    type

                  loopback      A loopback connector has been
                                detected.

                  null modem    A null modem has been detected.

                  rs232c        A cable conforming to the RS-232-C
                                standard has been detected.

                  rs449         A cable conforming to the RS449
                                standard has been detected.

                  rs422         A cable conforming to the RS422
                                standard has been detected.

                  rs423-v24     A cable is attached, but the connector
                                cannot distinguish whether it conforms
                                to RS423 or V.24 standards.

                  v28           A cable conforming to any of the CCITT
                                V.24, CCITT V.28, IS2110, or EIA-232-D
                                standards has been detected.

                  v35           A cable conforming to the V.35
                                standard has been detected.

                  x.21          A cable conforming to the X.21
                                standard has been detected.

    previous      Previous type of cable detected.
    interface
    type

                  no cable      No cable was attached to the
                                interface.

                  unknown       A cable was attached, but its type was
                                unknown.

 o  cable fault

    Generated each time the communications cable is detected as
    missing or invalid.  Arguments (The call reference argument is present
    only if the characteristic connection type is switched.):

    call          The call reference number of the call that was
    reference     disconnected because of the fault.

    previous      Type of cable that was connected before the error
    interface     was detected.
    type

                  loopback      A loopback connector.

                  null Modem    A null modem cable.

                  rs232c        A cable conforming to the RS-232-C
                                standard.

                  rs422         A cable conforming to the RS422
                                standard.

                  rs423-v24     A cable is attached, but the connector
                                cannot distinguish whether it conforms
                                to RS423 or V.24 standards.

                  rs449         A cable conforming to the RS449
                                standard.

                  unknown       A cable was connected but its type was
                                unknown.

                  v28           A cable conforming to any of the CCITT
                                V.24, CCITT V.28, IS2110, or EIA-232-D
                                standards.

                  v35           A cable conforming to the V.35
                                standard.

                  x.21          A cable conforming to the X.21
                                standard.

    reason        Reason that caused the event to occur.

                  invalid       A cable is attached but it is not one
                  cable         of those recognized

                  no cable      No cable can be detected

 o  clock loss

    Generated each time a loss of the transmit or receive clock is
    detected. Once this event occurs, the value of the interface state
    attribute changes to pending dte ready.

 o  dce not ready

    Generated each time a dce not ready condition is detected. Once
    this event occurs, the value of the interface state attribute
    changes to dte ready. This event is not supported if the
    characteristic modem control is none.

 o  device error

    A potential device error has been detected. This may be a
    temporary condition that means the device can continue to be used.
    Argument:

    reason        Reason for the failure. This is device specific.

 o  framing error

    Generated each time an asynchronous framing error occurs.

 o  incoming call failed

    Generated each time an incoming call is detected but the
    connection fails to complete. This event is supported only if
    the characteristic connection type is switched.  Arguments:

    call          Call Reference of the call that failed to connect.
    reference

    reason        Reason for the failure to complete the connection.

                  initial hold  The time set by the characteristic
                  time expired  initial hold timer has expired.

                  line          The line has been disabled.
                  disabled

                  line failure  There has been a communications
                                failure.

                  local         The entity has disconnected the line.
                  disconnect

                  no call       There is no client assigned to handle
                  control       the call.
                  client

                  remote or     The remote system has disconnected the
                  network       line
                  disconnect

                  remote test   The remote system is in test mode.
                  active

 o  loss of carrier

    Generated each time the carrier frequency is lost while receiving
    data. This event is not supported if the characteristic modem
    control is none.

 o  outgoing call failed

    Generated each time an attempt to complete an outgoing call fails.
    This event is supported only if the characteristic connection type
    is switched.  Arguments:

    Additional    Any extra information on the call failure above that
    information   given in other arguments.

    call          Call reference of the call that failed.
    reference

    dial          Dialing sequence used to make the call.
    sequence

    reason        Reason that the call could not be completed.

                  call          The call attempt occurred at the same
                  collision     time as an incoming call was received.

                  call          The call initiation failed.
                  initiation
                  failed

                  call not      The remote system did not answer
                  answered      the call within the time set by
                                the characteristic successful call
                                indication timer.

                  incoming      An incoming call has already been
                  call          answered.
                  answered

                  line          The line is disabled.
                  disabled

                  line failure  There has been a communications line
                                failure.

                  local         The local system has disconnected the
                  disconnect    line.

                  remote or     The remote system has disconnected the
                  network       line.
                  disconnect

                  remote test   The remote system is in test mode.
                  active

 o  rate fallback

    Generated each time the DCE indicates that it is changing from the
    high data rate (as indicated by the speed characteristic) to the
    low data rate (as indicated by the alternate speed characteristic.
    This can occur if there is excessive noise when operating at the
    high data rate. This event is supported only when the modem has a
    rate selection capability.

 o  test indication

    Generated each time the remote system tests the DCE. When this
    event occurs, the value of the interface state attribute changes
    to dte ready. This event is not supported id the characteristic
    modem control is none.

 o  transmit enable timeout

    Generated whenever the time to assert the clear to send signal
    (after receiving the request to send signal) is greater that that
    specified in the maximum enable transmit timer characteristic.
    This event is not supported id the characteristic modem control is
    none.

11  –  mop_circuit

 o  dump request completed

    This event is generated each time a remote dump service request
    completes successfully.

    Arguments: See the address, client, and file arguments described
    under the load request failed event.

 o  dump request failed

    This event is generated each time a remote dump request tries and
    fails. When a request is never started because of insufficient
    client information, the unrecognized dump client event is
    reported.

    Arguments: See the address, client, file, and reason arguments
    described under the load request failed event.

 o  load request completed

    This event is generated each time a remote load service request
    completes successfully.

    Arguments: See the address, client, file, and program type
    arguments described under the load request failed event.

 o  load request failed

    This event is generated each time a remote load request tries and
    fails. When a request is never started because of insufficient
    client information, the unrecognized load client event is
    reported.  Arguments:

    address     Data Link address of the remote system. This argument
                is supplied only for LAN data links.

    client      Name of the client that corresponds to the remote
                system.

    file        Name of the file being dumped or loaded.

    program     Program type requested by the remote system on a load
    type        operation.

                cmip         A file containing initialization data
                script       encoded as network management directives
                             in CMIP form.

                diagnostic   A file containing diagnostic test
                             procedures.

                management   A file containing initialization data
                             encoded in a product-specific format.

                secondary    A secondary file containing software to
                loader       be downline loaded.

                system       The primary file containing the system
                             image to be downline loaded.

                tertiary     A third file containing software to be
                loader       downline loaded.

    reason      Reason for the failure.

                file i/o     Unable to read load file or write dump
                error        file.

                file open    Unable to open load or dump file
                error        requested.

                no           Insufficient network management or
                resources    system resources.

                operation    Unexpected error prevents completion of
                aborted      request.

                protocol     A violation of the MOP protocol
                error        occurred.

                receive      Error or timeout receiving data from the
                error        network.

                transmit     Error reading data to the network.
                error

                unknown      Client requesting load or dump is not
                client       found in MOP client database.

 o  unrecognized dump client

    This event is generated each time a remote dump service request
    was not accepted because a required client database entry could
    not be found.

    Argument: See the address argument described under the load
    request failed event.

 o  unrecognized load client

    This event is generated each time a remote load service request
    was not accepted because a required client database entry could
    not be found.

    Arguments: See the address and program type arguments described
    under the load request failed event.

12  –  node

    The following event messages only apply to Tru64 UNIX:

 o  address changed

    Generated each time the node address changes.

    Arguments:

    old address    Protocol tower set that constituted the old node
                   address.

    new address    Protocol tower set that constitutes the new node
                   address.

 o  id changed

    Generated each time the node's ID status attribute changes value.

    Arguments:

    old id         Node's old 48-bit ID.

    new id         Node's new 48-bit ID.

 o  idrom check failure

    Generated each time that an IDROM was checked and failed the
    test.

    Arguments:

    contents       Value of the failed IDROM.

    owner          Name of the device on which the failed IDROM
                   address exists.

 o  renamed

    Generated each time the node's name changes.

    Arguments:

    old name       Old full name of the node.

    new name       New full name of the node.

13  –  nsp

13.1  –  local_nsap

 o  deleted remote nsap

    Generated each time a remote NSAP is deleted.

    Arguments:

    The event message lists all attributes for the deleted entity.

13.1.1  –  remote_nsap

 o  reject received

    Generated when a connection attempt initiated by the local NSAP is
    rejected by the remote NSAP.   Arguments:

    additional    If applicable, contains additional information from
    information   the variable part of the PDU.

    reason        Reason why the event was generated.

                  no resources  Transport rejected the connection
                                attempt because of insufficient
                                resources.

 o  reject sent

    Generated when a connection attempt initiated by the remote NSAP
    is rejected by the local NSAP.

    Arguments:

    See the arguments for the reject received event.

 o  remote protocol error

    Generated when a transport PDU received from the remote NSAP
    violates NSP protocol.   Arguments:

    erroneous     Includes some, none, or all of the PDUs causing the
    transport     event.
    data unit

    reason        Reason why the event was generated.

                  invalid flow  A PDU was discarded because it
                  control       contained flow control information
                                that, when used to compute the request
                                count, would produce a result that
                                exceeds the limits. The entire PDU is
                                provided in the erroneous transport
                                data unit argument.

                  invalid       A PDU was discarded because reserved
                  message       bits or values were used in the PDU.
                  format        The beginning of the PDU is provided
                                in the erroneous transport data unit
                                argument.

14  –  osak

 o  unknown ae title

    Generated when an inbound association request specifies an
    unknown application entity title. Increments the
    unknown ae-titles counter.   Arguments:

    ae title     The unknown application entity title.

 o  unknown invocation

    Generated when an inbound association request specifies an
    unknown application process invocation identifier or an unknown
    application entity invocation identifier. Increments the
    unknown invocations counter.  Arguments:

    invocation   The unknown application process or application
                 entity invocation identifier.

 o  unknown paddress

    Generated when an inbound association request specifies
    an unknown presentation address. Increments the
    unknown paddresses counter.  Arguments:

    paddress     The unknown presentation address.

14.1  –  application

 o  invalid mode

    Generated when an inbound connection request is rejected due to a
    mismatch of modes. Increments the invalid mode
    failures counter.

15  –  osi_transport

15.1  –  local_nsap

 o  deleted remote nsap

    This event is generated each time a remote NSAP is deleted.

    Arguments: The event message lists all attributes for the deleted
    entity.

15.1.1  –  remote_nsap

 o  checksum failure

    Generated each time a checksum validation fails on a received
    TPDU.

 o  invalid tpdu received

    Generated when a TPDU received from the remote NSAP is in
    violation of the OSI transport protocol. If the error occurred
    during connection establishment, a DR (disconnect request) TPDU
    will be sent in response to the protocol error. If the error
    occurred on an established transport connection, an ER (error)
    TPDU will be sent in response to the protocol error. The remote
    protocol error counter will be incremented.   Arguments:

    reject     If an ER TPDU was transmitted or received, this is
    cause      the value of the reject cause parameter. If a DR was
               transmitted, this is the value of the reason parameter.

    erroneous  The portion of the invalid TPDU transmitted or received
    trans-     in the invalid TPDU parameter of the ER or DR TPDU.
    port PDU   (OpenVMS only)

    DNA        The unique error number used to unambiguously
    error      distinguish between different errors. This number is
               completely independent of the reason and reject cause
               values defined by the OSI Transport protocol, the set
               of which is too sparse to provide useful information.

 o  er tpdu received

    Generated whenever an ER (error) TPDU is received from the remote
    NSAP. The local protocol error counter will be incremented.
    Arguments:

    reject     The value of the reject cause parameter in the received
    cause      ER TPDU.

    erroneous  The portion of the invalid TPDU received in the invalid
    trans-     TPDU parameter of the ER TPDU.
    port PDU

    DNA        The unique error number used to unambiguously
    error      distinguish between different errors. This number is
               completely independent of the reason and reject cause
               values defined by the OSI Transport protocol, the set
               of which is too sparse to provide useful information.
      	      (OpenVMS only)

 o  local transport disconnection

    Generated each time a connection attempt initiated by the remote
    NSAP is rejected by the local NSAP. This does not include rejects
    generated by the local user of the transport service. Thus, this
    event is generated on the transmission of a DR TPDU in which
    the reason parameter has a value other than 128. The reject sent
    counter will be incremented.   Argument:

    DNA error      This is the value transmitted in the additional
                   information parameter of the DR TPDU.

 o  remote transport disconnection

    This event is generated each time a connection attempt initiated
    from the local NSAP is rejected by the remote NSAP. This does
    not include rejects requested by the remote user of the transport
    service. Thus, this event is generated on the receipt of a DR
    TPDU in which the reason parameter has a value other than 128
    (which is a normal disconnect). The reject received counter will
    be incremented.  Arguments:

    reason      Reason why the event was generated and it is the
                value received in the reason parameter of the DR
                TPDU.

    additional  The value received in the additional information
    informa-    parameter of the DR TPDU. If the remote NSAP is a
    tion        DNA OSI Transport implementation, the additional
                information parameter will have one of the following
                values:

                '01'H        Too much user data in CR (connection
                             request) or CC (connection confirm) TPDU
                '02'H        Proposed TPDU size invalid
                '05'H        Invalid protocol class requested
                '07'H        Illegal negotiation attempted
                '08'H        Invalid parameter in TPDU
                '09'H        TPDU header length invalid
                '0A'H        Parameter length error in TPDU header
                '0B'H        TPDU longer than negotiated maximum
                '0C'H        Segmentation of expedited data illegal
                '0D'H        Invalid parameter value
                '10'H        Invalid TPDU type
                '12'H        Expedited data out of sequence
                '40'H        Unknown transport selector
                '41'H        Proposed protocol class(es) unavailable
                '42'H        Insufficient resources
                '43'H        Maximum connections already active
                '80'H        Unknown reference
                '81'H        Connection timed out
                '82'H        Idle connection timed out
                '83'H        Unacknowledged ER TPDU

16  –  routing

 o  address unreachable pdu discard

    Support: All

    Generated when a data PDU is discarded because the destination
    address is unreachable.

    Arguments:

    discard     Reason why the PDU was discarded.
    reason
                destination     The destination address is unknown.
                address unknown

                destination     The destination address is
                address         currently unreachable.
                unreachable

                duplicate       An optional PDU field occurs twice.
                option

                header syntax   There is a format error in the PDU
                error           header.

                incomplete      The received data did not contain a
                pdu             complete PDU.
                received

                incorrect       The checksum is incorrect.
                checksum

                lifetime        The PDU's lifetime expired while it was
                expired         being reassembled.
                during
                reassembly

                lifetime        The PDU's lifetime expired while it was
                expired         in transit.
                while data
                unit in
                transit

                pdu             No buffers were available to forward the
                discarded       packet.
                due to
                congestion

                protocol        Unable to translate a DECnet-Plus format
                procedure       PDU into a Phase IV format PDU.
                error

                reason not      No further information available.
                specified

                reassembly      Insufficient memory available to
                interference    reassemble a PDU.

                segmentation    The PDU requires fragmentation, but the
                required, but   originator did not permit this.
                not permitted

                unsupported     The PDU contained an unrecognized and
                option not      unsupported PDU option.
                specified

                unsupported     The PDU version is not supported.
                protocol
                version

                unsupported     The sender requested an unsupported form
                recording of    of route recording.
                route option

                unsupported     The sender requested an unsupported form
                source          of source routing.
                routing
                option

                phase iv        Phase IV destination address of the
                forwarding      Phase IV data packet.
                address

                phase iv        Phase IV source address of the Phase IV
                source          data packet.
                address

                forwarding      Destination NSAP address.
                address

                receiving       Name of the adjacency on which the PDU
                adjacency       was received.  For an end node, only the
                                circuit may be specified.

                source          Source NSAP address of the data NPDU.
                address

 o  aged ip packet discard

    Support: IP

    Generated when an IP packet is discarded because the interval
    specified in its time to live field has expired.

 o  aged pdu discard

    Support: L1,L2

    Generated when a data PDU is discarded because its lifetime has
    expired.

    Arguments:

    discard     Reason why the PDU was discarded. See possible
    reason      reasons described under the discard reason argument
                of the address unreachable pdu discard event. (Not
                all of these argument values can be generated by this
                event.)

    phase iv    Phase IV header of the Phase IV packet causing this
    pdu header  event.

    pdu header  Contents of the header of the data PDU that was
                discarded.

 o  attempt to exceed maximum sequence number

    Support: L1,L2

    Generated when an attempt is made to increase the sequence
    number of a link-state packet beyond the maximum allowed sequence
    number.

 o  corrupted lsp detected

    Support: L1,L2

    Generated when a corrupted link-state packet is detected in
    memory.

 o  egp message discard

    Support: All

    Generated when EGP Message is discarded.

 o  ip address unreachable packet discard

    Support: IP

    Generated when an IP packet is discarded because its destination
    is unreachable.

    Arguments:

    forwarding  IP address on which the forwarding decision for the
    IP address  IP packet was taken. This is usually the destination
                IP address.

    icmp        Value of the code field of the corresponding ICMP
    discard     destination unreachable message.
    reason
                host unreachable
                network unreachable
                source route failed

    LAN         Data link address of the broadcast circuit that
    address     is the previous hop for the packet. This argument
                is present only if the receiving entity argument
                identifies a broadcast circuit entity.

    receiving   Local name of the circuit entity corresponding to the
    entity      previous hop for the packet.

    source ip   Source IP address of the IP packet.
    address

 o  ip destination address packet error discard

    Support: IP

    Generated when an IP packet is discarded because the destination
    IP address is invalid (that is, it has an invalid format, or it
    refers to an unsupported network class).

    Arguments:

    destination Destination IP address in the IP packet.
    ip address

    LAN         Data link address of the broadcast circuit that
    address     is the previous hop for the packet. This argument
                is present only if the receiving entity argument
                identifies a broadcast circuit entity.

    receiving   Local name of the circuit entity corresponding to the
    entity      previous hop for the packet.

    source ip   Source IP address of the IP packet.
    address

 o  ip packet discard

    Support: IP

    Generated when an IP packet is discarded because of version
    number mismatch or bad checksum.

    Arguments:

    ip discard  Reason why the IP packet was discarded. See the ip
    reason      discard reason argument of the IP Packet Format Error
                event.

    ip header   IP header of the PDU that caused the event.
    receiving   Local name of the circuit entity corresponding to the
    entity      previous hop for the packet.

 o  ip packet format error

    Support: IP

    Generated when an IP packet is discarded because it contains a
    format error.

    Arguments:

    ip discard  Reason why the IP packet was discarded.
    reason
                duplicate option
                header syntax error
                incomplete packet received
                incorrect checksum
                incorrect header length
                incorrect total length
                option error
                protocol procedure error
                reason not specified
                received via broadcast
                unsupported option not specified
                unsupported protocol version
                unsupported security option

    ip header   IP header of the PDU that caused the event.
    LAN         Data link address of the broadcast circuit that
    address     is the previous hop for the packet. This argument
                is present only if the receiving entity argument
                identifies a broadcast circuit entity.

    pointer     Offset of the octet in the IP header that caused the
                format error.

    receiving   Local name of the circuit entity corresponding to the
    entity      previous hop for the packet.

 o  ip protocol unreachable packet discard

    Support: IP

    Generated when an IP packet is discarded because there was no
    port on the local system for the protocol type specified in the
    IP header.

    Arguments:

    destination Value of the protocol field in the IP packet.
    protocol

    icmp        Value of the code field of the corresponding ICMP
    discard     destination unreachable message.
    reason
                Port Unreachable
                Protocol Unreachable

    LAN         Data link address of the broadcast circuit that
    address     is the previous hop for the packet. This argument
                is present only if the Receiving Entity argument
                identifies a broadcast circuit entity.

    receiving   Local name of the circuit entity corresponding to the
    entity      previous hop for the packet.

    source ip   Source IP address of the IP packet.
    address

 o  ip source address packet error discard

    Support: IP

    Generated when an IP packet is discarded because the source IP
    address is invalid (that is, it has an invalid format, or it
    refers to an unsupported network class).

    Arguments:

    destination Destination IP address in the IP packet.
    ip address

    LAN         Data link address of the broadcast circuit that
    address     is the previous hop for the packet. This argument
                is present only if the Receiving Entity argument
                identifies a broadcast circuit entity.

    receiving   Local name of the circuit entity corresponding to the
    entity      previous hop for the packet.

    source ip   Source IP address of the IP packet.
    address

 o  lsp L1 database overload

    Support: L1,L2

    Generated when the status attribute L1 state changes from on to
    waiting, or vice versa.

    Arguments:

    source id   Source ID of the link-state packet.

    state       Current state.
    change
                recovered    Router operating normally.

                waiting      Router has failed to store a link-state
                             packet, and is operating in restricted
                             mode.

 o  lsp L2 database overload

    Support: L2

    Generated when the status attribute L2 state changes from on to
    waiting, or vice versa.

    Arguments:

    source id   Source ID of the link-state packet.

    state       Current state.
    change
                recovered    Router is operating normally.

                waiting      Router has failed to store a link-state
                             packet, and is operating in restricted
                             mode.

 o  manual address dropped from area

    Support: L1,L2

    Generated when one of the addresses in the manual area addresses
    set is ignored when computing an area address. The event is
    generated once for each address that is dropped.

    Argument:

    area        Area address that caused the maximum number of area
    address     addresses to be exceeded.

 o  own lsp purged

    Support: L1,L2

    Generated when a zero-aged copy of a node's own link-state packet
    is received from some other node. This represents an invalid
    attempt to purge the local node's link-state packet.

 o  pdu format error

    Support: All

    Generated when a data PDU is discarded because of a format error.

    Arguments:

    discard     Reason why the PDU was in error. See possible reasons
    reason      described under the discard reason argument of the
                address unreachable pdu discard event. (Not all of
                these argument values are generated by this event.)

    phase iv    Phase IV header of the Phase IV packet causing this
    pdu header  event.

    pdu header  Contents of the header of the data PDU that was
                discarded.

    receiving   Name of the adjacency on which the PDU was received.
    adjacency   For an end node on a LAN, only the circuit may be
                specified for Tru64 UNIX.

 o  phaseiv translation failure

    Support: All

    Generated when a PDU is discarded because it cannot be translated
    to Phase IV format.

    Arguments:

    receiving   Local entity name of the adjacency upon which the
    adjacency   PDU was received. For an end node on a LAN, only the
                circuit may be specified for Tru64 UNIX.

    pdu header  Data PDU header causing the event.

 o  sequence number skipped

    Support: L1,L2

    Generated when the sequence number of a link-state packet is
    incremented by more than 1. This usually occurs when a router is
    reenabled while its previous link-state packets are still stored
    in the network.

 o  unsupported option

    Generated when a data packet is received that contains an
    unsupported option in its header.

    Arguments:

    discard     Reason why the event was generated. See possible
    reason      reasons described under the discard reason argument
                of the address unreachable pdu discard event. (Not
                all of these argument values are generated by this
                event.)

    pdu header  Contents of the header of the data PDU that caused
                the event.

    receiving   Name of the adjacency on which the PDU was received.
    adjacency   For an end node on a LAN, only the circuit may be
                specified.

16.1  –  circuit

 o  adjacency state change

    Support: All

    Generated when the status attribute state of a routing circuit
    adjacency entity belonging to the circuit changes from up to
    down, or vice versa. For the purposes of this event, the state
    up/dormant is considered to be the same as up, and the state
    initializing is considered to be the same as down. For end nodes,
    this event is generated for point-to-point links only.

    Arguments:

    adjacency   The name of the adjacency to which the event refers.
    name

    adjacent    Node IDs of the adjacent node.
    node

    new         Current state of the adjacency.
    adjacency
    state       down         Adjacency state is now down.
                up           Adjacency state is now up.

    reason      Reason why the adjacency state changed to down.

                address out  The adjacency address is invalid.
                of range

                configura-   The adjacency has been incorrectly
                tion fault   configured.

                exceeded     The value of the characteristic maximum
                maximum      call attempts has been exceeded.
                call
                attempts

                area         The adjacent node's area address is
                mismatch     incorrect.

                call         An X.25 call to the adjacent node
                rejected     failed.

                checksum     A PDU's checksum was invalid.
                error

                circuit      The circuit has been disabled by network
                disabled     management.

                datalink     Exceeded maximum call attempts;
                failure      configuration fault.

                holding      No Hello traffic has been received
                timer        during the period of the Hello timer.
                expired

                maximum      There are more adjacent nodes than can
                broadcast    be supported on a LAN.
                end nodes
                exceeded

                maximum      There are more adjacent nodes than can
                broadcast    be supported on a LAN.
                routers
                exceeded

                neighbor     The address(es) in the hello has/have
                node         changed.
                change

                one way      The connectivity between two LAN
                connectiv-   routers appears to permit traffic in
                ity          one direction only.

                reserve      This may occur temporarily during a
                timer        change of designated router. Repeated
                expired      occurrences indicate a configuration or
                             hardware error.

                version      The adjacent node is the wrong version.
                skew

                wrong node   The adjacent routing node is of the
                type         wrong type.

 o  authentication failure

    Support: L1,L2,IP

    Generated when a PDU is received that contains an Authentication
    Information field that is incompatible with the PDU type.

    Arguments:

    adjacent        Node ID of the adjacent node.
    node

    authentication  Authentication level of the PDU: area, circuit,
    level           domain.

    pdu type        Type of the PDU.

                    L1 LSP       L2 PSNP
                    L1 CSNP      LAN L1 Hello
                    L1 PSNP      LAN L2 Hello
                    L2 LSP       PtPt Hello
                    L2 CSNP

 o  circuit change

    Support: All

    Generated when the status attribute state of the circuit changes
    from off to on, or vice versa.

    Argument:

    disable     The reason that the circuit status changed from on to
    reason      off. If the disable occurred because of a management
                circuit disable action, the reason is a Management
                Action (1). If the disable occurs for any other
                reason, it is a Protocol Action (0).
    new         Current state of the circuit.
    circuit
    state
                off          Circuit state is now off.
                on           Circuit state is now on.

 o  corrupted hello pdus received

    Support: All

    Generated when an ES-IS (end system to intermediate system) or
    IS-IS (intermediate system to intermediate system) Hello PDU is
    received that either cannot be parsed or contains an incorrect
    checksum.

 o  corrupted lsp received

    Support: L1,L2

    Generated when a corrupted link-state packet is received.

    Argument:

    adjacent    Node IDs of adjacent nodes.
    node

 o  corrupted phaseiv routing packet received

    Support: L1,L2

    Generated when a corrupted Phase IV routing packet is received.

    Argument:

    phase iv    Phase IV ID of the Phase IV routing message that
    id          caused the event to be generated.

 o  da adjacency change

    Support: All

    Generated when the state of a DA adjacency on the circuit changes
    from up to down or from down to up. For these purposes, the
    states up and up/dormant are considered up and any other state is
    considered down. This attribute is supported only if the circuit
    type is x25 da.

    Arguments:

    adjacency   Name of the adjacency to which the event refers.
    name

    new         Current state of the adjacency.
    adjacency
    state       down         Adjacency state is now down.
                up           Adjacency state is now up.

    reason      Reason why the adjacency state changed to down.

 o  exceeded maximum svc adjacencies

    Support: End,L2 (DA
    circuits only)

    Generated when there is no free adjacency on which to establish
    an SVC for a new destination.

 o  id reachability change

    Support: All

    Generated when an ID is added to or removed from the endnodeID
    status of an adjacency on this circuit. For end nodes this event
    is generated for point-to-point links only.

    Arguments:

    adjacency   Name of the adjacency to which the event refers.
    name

    adjacent    Node IDs of the adjacent node.
    node

    reason      Reason why the adjacency state changed to down.

 o  initialization failure

    Support: All

    Generated when an attempt to initialize with an adjacent node
    fails, either because of version skew or area mismatch.

    Arguments:

    adjacent    Node IDs of adjacent nodes.
    node

    reason      Reason why the event was generated. See possible
                reasons described under the adjacency state change
                event.

 o  ip adjacency state change

    Support: IP

    Generated when the status attribute state of a routing circuit
    ip adjacency entity belonging to this circuit changes from up (or
    up/dormant) to some other value, or the reverse.

    Arguments:

    neighbor    IP address of the neighbor.
    IP address

    new IP      New state of the IP adjacency.
    adjacency
    state       up           Either up or up/dormant
                down         Any other state

    reason      Reason for the state change.

 o  ip fragmentation failure

    Support: IP

    Generated when an IP packet that requires fragmentation in
    order to be transmitted has an IP header that requests "do not
    fragment."

    Arguments:

    destination Destination IP address of the IP packet.
    IP address

    source IP   Source IP address of the IP packet.
    address

 o  irrecoverable svc failure

    Support: All

    Generated when recall count becomes equal to maximum call
    attempts. This attribute is supported only if the circuit type
    is x25 static outgoing.

    reason      Reason why the adjacency state changed to down.

 o  LAN L1 designated router change

    Support: L1,L2

    Generated when the local node either elects itself or resigns as
    the LAN level 1 designated router on this circuit.

    Argument:

    designated  New state of the designated router.
    router
    change      elected      Router state is now elected.

                resigned     Router state is now resigned.

 o  LAN L2 designated router change

    Support: L2

    Generated when the local node either elects itself or resigns as
    the LAN level 2 designated router on this circuit.

    Argument:

    designated  New state of the designated router.
    router
    change      elected      Router state is now elected.

                resigned     Router state is now resigned.

 o  LAN phaseiv designated router change

    Support: L1,L2

    Generated when the local node either elects itself or resigns as
    the LAN Phase IV designated router on this circuit.

    Argument:

    designated  New state of the designated router.
    router
    change      elected      Router state is now elected.

                resigned     Router state is now resigned.

 o  redirect discard

    Support: End

    Generated when a Redirect packet is discarded because of
    insufficient cache space.

 o  rejected adjacency

    Support: All

    Generated when an attempt to create a new adjacency fails because
    of insufficient resources.

    Arguments:

    adjacent    Node IDs of adjacent nodes.
    node

    reason      Reason for the failure. See possible reasons
                described under the adjacency state change event.

 o  rejected ip adjacency

    Support: IP

    Generated when an attempt to automatically create an IP adjacency
    to an IP router fails because of lack of resources.

    Arguments:

    neighbor    IP address of the neighbor.
    IP address

    reason      Reason why the attempt failed. See the description of
                the Reason argument of the IP Adjacency State Change
                event.

 o  rip error received

    Support: L2,IP

    Generated when any kind of error is detected in a received RIP
    packet. This event is generated only if the routing entity's
    characteristic routing protocols supported includes the value
    RIP.

    Arguments:

    neighbor    IP address of the neighbor.
    IP address

    RIP reason  Type of error that was detected in the RIP packet.
                format
                error
                version
                skew

    RIP         RIP version number of the RIP packet. This argument
    version     is present only if the RIP Reason is Version Skew.

 o  verification reject

    Generated when a verification attempt fails.

16.2  –  egp_group

16.2.1  –  egp_neighbor

 o  error message received

    Support: L2,IP

    Generated when an EGP error response message is received.

    Arguments:

    neighbor    IP address of this neighbor.
    ip address
    reason      Reason why the error message occurred.
                autonomous system number rejected
                bad EGP data field format
                bad EGP header format
                excessive polling rate
                no response
                reachability information unavailable

 o  error message sent

    Support: L2,IP

    Generated when an EGP error response message is sent.

    Arguments:

    neighbor    IP address of this neighbor.
    ip address

    reason      Reason why the error message occurred. See the
                description of the Reason argument of the Error
                Message Received event.

 o  received message discard

    Support: L2,IP

    Generated when a received EGP message is discarded for some
    reason.

    Arguments:

    neighbor    IP address of this neighbor.
    ip address

    reason      Reason why the error message occurred. See the
                description of the Reason argument of the Error
                Message Received event.

 o  send message discard

    Support: L2,IP

    Generated when an EGP message for transmission is discarded for
    some reason.

    Arguments:

    neighbor    IP address of this neighbor.
    ip address

    reason      Reason why the error message occurred. See the
                description of the Reason argument of the Error
                Message Received event.

 o  start

    Support: L2,IP

    Generated when a start command completes successfully.

    Argument:

    neighbor    IP address of this neighbor.
    ip address

 o  state change

    Support: L2, EGP

    Generated when the status attribute egp state changes to some
    other state.

    Argument:

    neighbor    IP address of this neighbor.
    ip address

 o  stop

    Support: L2,IP

    Generated when a stop command completes successfully.

    Argument:

    neighbor    IP address of this neighbor.
    ip address

17  –  session_control

 o  access control violation

    Generated each time that Session Control detects an access
    control violation. The arguments provide information about the
    source and destination.

    Arguments:

    destination End-user specification of the destination account.

    destination Destination account information.
    account

    destination Destination user name.
    user

    node name   Name of the source node.

    nsap        Network address of the source node.
    address

    source      End-user specification at the source node.

 o  backtranslation deletion

    Generated each time that a backward translation name is discarded
    because of an irrecoverable error.

    Arguments:

    name        Deleted name.

    reason      DECdns error that caused the deletion.

 o  bad backtranslation link

    Generated when an attempt to access a backward translation soft
    link results in a clerk exception indicating that some attribute
    in the soft-link chain was improperly configured.

    Arguments:

    name        Name improperly configured.

    reason      Reason for the exception.

 o  dangling link

    Generated each time an attempt to access an attribute of a
    backward translation soft link results in a clerk. Dangling
    exception.

    Argument:

    name        Full name of the soft link.

 o  deleted maintained object

    Generated each time that a tower maintenance entity is discarded
    because of an irrecoverable error.

    Arguments:

    client      Network management name of the user who issued the
                keepmehere call that resulted in the creation of this
                entity.

    creation    Time this entity was created.
    time

    higher      Set of higher towers that was passed in the
    towers      keepmehere that created this entity.

    last        A DECdns error code that indicates the reason for the
    failure     last update failure.
    reason

    last        Time of the last successful update to the DNA$Towers
    successful  attribute.
    update

    last        Time that the last attempt to update the DNA$Towers
    update      attribute completed.
    completed

    last        Time that the last attempt to update the DNA$Towers
    update      attribute was initiated.
    started

    name        Full name of the deleted entity.
    reason      DECdns error that caused the deletion.

    uid         Entity's unique identifier, generated when the entity
                is created.

    update      Generated each time that an attempt to update a
    failures    DNA$Towers attribute fails.

    update      Generated each time that an attempt to update a
    successes   DNA$Towers attribute succeeds.

 o  verification failure

    Generated each time that session control is unable to verify that
    the addresses and protocols of an incoming connection request are
    consistent with the DNA$Towers attribute of the source node name.

    Arguments:

    address     Unverified protocol address sequence.

    node        Full name of the source node.

17.1  –  backtranslation_softlink

 o  deleted

    The given backtranslation softlink subentity instance was
    deleted.

    Argument:

    creation    Time this subentity was created.
    time

    network     Network entity title for this soft link.
    entity
    title

    state       Status of the entity.

    target      Target for soft link.

    update      Times an update for this subentity failed.
    failures

    update      Times an update for this subentity succeeded.
    success

 o  update failure

    Signals an attempt to create, delete, or retarget a
    backtranslation has failed.

    Argument:

    reason      Reason for the failure.

17.2  –  tower_maintenance

 o  update failure

    Generated each time that an attempt to update a DNA$Towers
    attribute fails.

18  –  token ring (Tru64 UNIX)

18.1  –  station

 o  abort transmitted

    Station has transmitted an abort delimiter.

 o  auto-removal failure

    Self-test failed following a beacon auto-removal process.

 o  burst error

    Absence of transitions on the physical media.

 o  frame copied error

    This station received a frame addressed to its MAC address with
    the A and C bits set.

 o  internal error

    Station has detected an internal error.

 o  line error

    CRC error or Manchester Violation detected in a token or frame
    with the E bit = 0.

 o  lobe wire fault

    Short or open circuit detected on cable.

 o  lost frame error

    TRR timer expired while this station was transmitting.

 o  receive data overrun

    A receive overrun hardware error was detected.

 o  remove received

    Remove ring station MAC frame received.

 o  ring beacon initiated

    The station started the beacon process.

 o  ring beaconing

    Beacon MAC frames being sent or received.

 o  ring poll error

    Failure to properly set A and C bits during the ring poll process.

 o  ring recovery

    Station is receiving or transmitting claim token MAC frames.

 o  route discovery failure

    Route discover timer expired.

 o  selftest failure

    The implementation specific self-test procedures have detected a
    failure.

 o  signal loss

    Loss of signal on the physical media.

 o  single station

    The only station participating in the ring poll process.

 o  soft errors reported

    Soft error report MAC frame sent to ring error monitor.

 o  station buffer unavailable

    No buffer was available to receive a frame.

 o  token error

    This station, as active monitor, has had to transmit a new token
    following an error condition.

 o  transmit failed

    Failure to transmit operation other than underrun.

 o  transmit underrun

    Transmit failed due to underrun.

 o  unrecognized individual pdu destination

    An individually addressed frame with unrecognized DSAP or
    protocol ID.

 o  unrecognized multicast pdu destination

    A globally addressed frame with unrecognized DSAP or protocol ID.

 o  user buffer unavailable

    Data link user did not supply a receive buffer.

19  –  x25_access

 o  incoming call blocked

    Generated when an incoming call from the X.25 Protocol module (or
    from the X.25 Client module in an accessing system) is blocked
    and cleared by the X.25 Access module's security mechanisms.

    Arguments:

    filter      Name of the selected filter.

    group       Name of the x25 protocol group entity corresponding
                to the BCUG that matches the CUG number specified in
                the Call packet. This argument is present only when
                the call is delivered via a bilateral closed user
                group.

    inbound     Name of the DTE class associated with the incoming
                call by the x25 protocol dte entity.

    security    This DTE class identifies the security dte class entity
    dte class   to be used for remote DTE matching.

    remote dte  Name of the remote dte entity whose remote address
                prefix was selected by the matching algorithm. This
                argument is not present when the call is delivered
                via a bilateral closed user group.

    sending     DTE address of the calling DTE. This argument is not
    dte         present when the call is delivered via a bilateral
                closed user group.

 o  incoming call failed

    Generated when an incoming call from the X.25 Protocol module (or
    from the X.25 Client module in an accessing system) is cleared by
    the X.25 Access module.

    Arguments:

    group       Name of the x25 protocol group entity corresponding
                to the BCUG that matches the CUG number specified in
                the Call packet. This argument is present only when
                the call is delivered via a bilateral closed user
                group. Since group entities do not exist at accessing
                systems, this argument is present only at gateway
                systems.

    reason      Reason why the call failed.
                insufficient The X.25 Access module has insufficient
                resources    resources to handle the call.

                no filters   The incoming call failed to match any of
                             the active filters.

                security     The dte class of the incoming call has
                dte class    an invalid security DTE class associated
                not found    with it.

                security     The filter on which the incoming call
                filter not   was matched has an invalid security
                found        filter associated with it.

    security    Name of the security dte class entity that was
    dte class   referenced by the selected dte class entity. This
                argument is present only if the reason for the event
                is security dte class not found.

    security    Name of the security filter entity that was
    filter      referenced by the selected dte class entity. This
                argument is present only if the reason for the event
                is security filter not found.

    sending     DTE address of the remote DTE.
    dte

 o  in use filter deleted

    Generated when an active filter has been deleted by the use of
    the NCL delete x25 access filter command.

    Arguments:

    filter      The name of the deleted filter.

    listener    The name of the application associated with the
                filter.

 o  outgoing call blocked

    Generated when the X.25 Access module's security mechanisms
    prevent a client from making an outgoing call.

    Arguments:

    blocked by  Specifies where the security blocking occurred.
                gateway      Blocked by the gateway system.
                security
                local        Blocked by the accessing system.
                security

    client      Name of the entity that made the call.

    destination Specifies the called DTE address. This argument is
    dte         not present if the call specifies a bilateral closed
                user group.

    dte class   Name of the DTE class specified in the call. This
                argument is not present if the call specifies a
                bilateral closed user group.

    group       Name of the x25 protocol group entity specified in
                the call. This argument is present only if the call
                specifies a bilateral closed user group. Since group
                entities do not exist at accessing systems, this
                argument is present only on gateway systems.

    remote      DNS name of the entity that made the call. If the
    port        call is blocked by gateway security, this identifies
                the X.25 access client on the accessing system. This
                argument is mandatory only if the client of X.25
                access is the X.25 Server module.

    security    Name of the remote dte entity whose remote address
    DTE class   prefix was selected by the matching algorithm. This
    remote DTE  argument is not present if the call is made to a
                bilateral CUG.

    source      (OpenVMS) Name of the entity that made the call.
                This identifies the client of X.25 Access at the
                accessing system when the call is blocked by security
                on a gateway system. This argument is mandatory only
                when the client of X.25 Access is the X.25 Server
                module.

 o  outgoing call configuration error

    Generated when a call fails because of misconfiguration of the
    security databases.

    Arguments:

    reason      Specifies why the call failed.
                security     The DTE class of the outgoing call
                dte class    must have a valid security DTE class
                not found    associated with it.

    security    Name of the security dte class entity that was
    dte class   referenced by the selected dte class entity.

 o  port terminated

    Generated whenever a port is closed. The event arguments simply
    reflect the attributes of the port at the time it was terminated.

    Arguments:

    call          Name of the x25 access filter entity that matched
    association   an incoming call, or the name of the x25 access
                  template entity used in making an outgoing call.
                  This attribute is supported only if the status
                  attribute port type is set to switched and the
                  status attribute state is not set to open.

    call          Direction of the call on an SVC.
    direction
                  incoming   The call is an incoming call.
                  outgoing   The call is an outgoing call.

    This attribute is supported only if the status attribute port
    type is set to switched and the status attribute state is not
    set to open.

    calling       Calling NSAP address that is carried transparently
    address       in an incoming or outgoing call packet. This attribute
    extension     is supported only if the status attribute port type
                  is set to switched and the status attribute state is
                  not set to open.

    calling dte   Calling DTE address in a call request or incoming
    address       call packet (depending on the value of the status
                  attribute call direction). This attribute is supported
                  only if the status attribute port type is set to
                  switched and the status attribute state is not set
                  to open.

    channel       Channel number of the underlying virtual circuit.
                  This status is valid only if the port is at a
                  gateway system and the status attribute state is
                  not open.

    client        Name of the entity that made or accepted the call.

    data octets   Number of data octets received at the port.
    received

    data octets   Number of data octets sent by the port.
    sent

    dte class     Name of the DTE class to which the DTE of the
                  underlying virtual circuit belongs. This attribute
                  is supported only if the status attribute state is
                  not set to open.

    fast select   Specifies whether fast select is in operation for
                  the call.

                  fast select        Fast select in operation.

                  no fast select     Fast select not in operation.

                  not specified      Facility not requested.

                  with response      Fast select with response in
                                     operation.

    This attribute is supported only if the status attribute port
    type is set to switched and the status attribute state is not set
    to open.

    group         Name of the x25 protocol group entity (that is, CUG)
                  associated with an incoming or outgoing call. This
                  attribute is supported only if the status attribute
                  port type is set to switched and the status attribute
                  state is not set to open.

    incoming      Packet size, in octets, for incoming data on a virtual
    packet        circuit. This attribute is supported only if the status
    size          attribute state is not set to open.

    incoming      Throughput class for incoming data on a virtual
    throughput    circuit.
    size

    incoming      Window size for incoming data on a virtual circuit.
    window size

    local dte     Name of the DTE entity associated with the call.

    originally    If a call is redirected, this is the DTE address
    called        from which the call was redirected; otherwise,
    address       the address is null. This status is valid only if
                  the status attribute redirect reason is not
                  [not] redirected. This attribute is supported only
                  if the status attribute port type is set to switched
                  and the status attribute state is not set to open.

    outgoing      Packet size, in octets, for outgoing data on a
    packet        virtual circuit. This attribute is supported only
    size          if the status attribute state is not set to open.

    outgoing      Throughput class for outgoing data on a virtual
    throughput    circuit.
    class

    outgoing      Window size for outgoing data on a virtual circuit.
    window        This attribute is supported only if the status
    size          attribute state is not set to open.

    pdus          Number of pdus received at the port.
    received

    pdus sent     Number of pdus sent by the port.

    protocol      First four octets of call data in the call. This
    identifier    attribute is supported only if the status attribute
                  port type is set to switched and the status
                  attribute state is not set to open.

    pvc           Name of the pvc to which this port belongs. This
                  attribute is present only if the status attribute
                  port type is set to permanent.

    redirect      Specifies whether a call has been redirected and,
    reason        if so, the reason for the redirection.

                  busy         The call has been redirected because
                               the original destination was busy.

                  not         The call has not been redirected.
                  redirected

                  out of      The call has been redirected because the
                  order       original destination was not operational.

                  systematic  The call has been redirected because
                              all calls to the original destination
                              have been systematically redirected.

    This attribute is supported only if the status attribute port
    type is set to switched and the status attribute state is not set
    to open.

    reference     Time at which the port was created (if the
    time          circuit is a PVC), or the time at which the
                  port was first used to send or receive a
                  call at the X.25 user interface (if the circuit
                  is an SVC).

    remote        Name of the peer entity with which this port is
    port          communicating.

    reserved      If the port is associated with a reserved Logical
                  Channel Number (LCN), this specifies the name of the
                  local DTE entity on which the LCN is reserved. A null
                  string indicates that the port is not associated with
                  a reserved LCN. This attribute is supported
                  only if the status attribute port type is set to
                  switched and the status attribute state is not set
                  to open.

    reverse       Specifies whether reverse charging is in operation for
    charging      the call. This attribute is supported only if the status
                  attribute port type is set to switched and the status
                  attribute state is not set to open.

    segments      Number of segments of data sent by this port.
    sent

    segments      Number of segments of data received by this port.
    received

    state         Status of the x25 access port entity.

        called         A call has been received and taken by a user.

        calling        A user is making a call.

        cleared        A Clear Indication or Clear Confirmation packet
                       has been received, or the X.25 Protocol module has
                       detected an error.

        cleared by     The port was cleared by network management.
        directive

        clearing       A user has requested that the call should be
                       cleared.

        no communi-    Communications with the PSDN have been lost.
        cation

        open           The port is open.

        running        The associated virtual circuit is available for
                       data transfer.

        synchronizing  A user has requested a reset, but the network has
                       not yet responded with a Reset Confirmation or
                       Reset Indication packet.

        unsynchronized A Reset Indication packet has been received, or
                       the X.25 Protocol module has detected an error
                       and the user has not yet responded with a reset
                       request.

     target       Called NSAP address that is transparently carried in
     address      an incoming or outgoing call packet. This attribute is
     extension    supported only if the status attribute port type is
                  set to switched and the status attribute state is not
                  set to open.

     target dte   Called DTE address in a call request or incoming call.
     address      This attribute is supported only if the status attribute
                  port type is set to switched and the status attribute
                  state is not set to open.

     type         Specifies that the port represents an SVC.

                  switched       The circuit is an SVC.

                  permanent      The circuit is a PVC.

 o  pvc access blocked

    Generated when a client of X.25 Access is not allowed to access a
    PVC.

    Arguments:

    blocked by  Where the blocking occurred.
                gateway      At the gateway system
                security
                local        At the accessing system
                security

    client      Name of the entity that attempted to use the pvc.

    pvc         Name of the pvc.

    source      Name of the entity that attempted to use the PVC.
                This identifies the client of X.25 Access module
                at the accessing system when the call is blocked
                by security on a gateway system. This argument is
                mandatory only when the client of the X.25 Access
                module is the X.25 Server module.

20  –  x25 client (OpenVMS)

 o  server connect rejected

    Generated when a requested connection to an X.25 gateway system
    is rejected.

    Arguments:

    application Address of the X.25 application that has rejected a
                connect request.

    node        Address of a node that has rejected a connect
                request.

    server      Address of the X.25 server that has rejected a
                connect request.

 o  session control unavailable

    Generated when the X.25 Client module detects the absence of the
    Session Control module, or when it detects that Session Control
    is disabled.

    Arguments:

    module      Whether the Session Control module is unavailable or
    extant      merely disabled. If false, the Session Control module
                is unavailable; if true, it is disabled. If false,
                the Session Control Port State argument is null.

    session     State of the Session Control port.
    control
    port state
                null         The Session Control module is
                             unavailable.
                off          The Session Control port is in the Off
                             state.
                restricted   The Session Control port is in the
                             Restricted state.
                shut         The Session Control port is in the Shut
                             state.

21  –  x25_protocol

21.1  –  dte

 o  diagnostic packet received

    Generated when the DTE receives a diagnostic packet from the
    network.

    Arguments:

    cause       Cause code provided by the DCE on reset.

    channel     Concatenated logical channel group and logical
                channel number of the virtual circuit associated
                with the event.

    diagnostic  Diagnostic code provided by the DCE on reset.

 o  dte down

    Generated when the status attribute state changes from on to off,
    synchronizing, or unsychronized.

    Arguments:

    configuration  Specifies whether or not there has been a
    error          configuration error.

    lapb link      DTE state has changed due to the deletion of the
    deleted        underlying link service provider entity.

 o  dte up

    Generated when status attribute state changes to on from off,
    synchronizing, or unsychronized.

    Argument:

    config-    Specifies the DTE configuration.
    uration
               dce         The DTE has initialized as a packet-mode
                           DCE.

               dte         The DTE has initialized as a packet-mode
                           DTE.

               Negotiated  The DTE has negotiated to operate as a
               dce         packet-mode DCE.

               Negotiated  The DTE has negotiated to operate as a
               dte         packet-mode DTE.

 o  illegal packet received

    Generated when the DTE receives an illegal packet from the
    network.

    Arguments:

    call time   Time at which the call request was made.

    ccitt       CCITT state.
    state

    channel     Concatenated logical channel group and logical
                channel number for the virtual circuit associated
                with the event.

    direction   Direction of the call.

                incoming     The call was incoming.

                outgoing     The call was outgoing.

    failure     Specifies why the packet was flagged as illegal.
    reason
                header       Error in the received block header.
                error

                invalid      Invalid general format identifier.
                gfi

                invalid      The packet is invalid in the current
                state        state of the protocol.

                no           No interrupt packet was sent.
                interrupt
                sent

                too long     The packet is too long.

                too short    The packet is too short.

                unacknowledgeThere is an outstanding interrupt.
                interrupt

                unrecognizedThe  packet is unrecognizable to the DTE.

    header      Header contents of the packet that caused the event.

    packet      Type of illegal packet.
    type

    remote dte  Address of the DTE that is the source of an incoming
                call or the destination of an outgoing call.

 o  network initiated reset

    Generated when the DTE receives a Reset packet from the network.

    Arguments:

    cause       Cause code provided by the DCE on reset.

    ccitt       CCITT state. See possible reasons described under the
    state       illegal packet received event.

    channel     Concatenated logical channel group and logical
                channel number of the virtual circuit associated
                with the event.

    diagnostic  Diagnostic code provided by the DCE on reset.

    direction   Direction of the call.
                incoming     The call was incoming.
                outgoing     The call was outgoing.

 o  network initiated restart

    Generated when the DTE receives a Restart packet from the
    network.

    Arguments:

    cause       Cause code provided by the DCE on reset.

    ccitt       CCITT state. See possible reasons described under the
    state       illegal packet received event.

    channel     Concatenated logical channel group and logical
                channel number of the virtual circuit associated
                with the event.

    diagnostic  Diagnostic code provided by the DCE on reset.

 o  protocol error detected

    Generated when a protocol error is detected.

    Arguments:

    call time   Time at which the call request was made.

    ccitt       CCITT state. See possible reasons described under the
    state       illegal packet received event.

    channel     Concatenated logical channel group and logical
                channel number for the virtual circuit associated
                with the event.

    failure     Reason for the protocol error.
    reason
                bad p(r)     Invalid receive packet sequence number
                received     received.

                bad p(s)     Invalid transmit packet sequence number
                received     received.

                invalid      Invalid Logical Channel Number.
                lcn

                invalid      Error in negotiated or requested packet
                packet       size.
                size

                invalid      Error in negotiated or requested
                throughput   throughput class.
                class

                invalid      Error in negotiated or requested window
                window       size.
                size

                no fast      Fast Select is not supported.
                select

                receiver     Data received while in receiver not
                not ready    ready state.

    header      Header contents tht caused the event.

    remote dte  Address of the DTE that is the source of an incoming
                call or the destination of an outgoing call.

 o  reject packet received

    Generated when the DTE receives a Reject packet from the network.

    Arguments:

    call time   Time at which the call request was made.

    ccitt       CCITT state. See possible reasons described under the
    state       illegal packet received event.

    channel     Concatenated logical channel group and logical
                channel number of the virtual circuit associated
                with the event.

    direction   Direction of the call.
                incoming     The call was incoming.
                outgoing     The call was outgoing.

    remote dte  Address of the DTE that is the source of an incoming
                call or the destination of an outgoing call.

 o  retry failed

    Generated when one of the DTE's maximum retry counts has been
    reached.

    Arguments:

    ccitt       CCITT state. See possible reasons described under the
    state       illegal packet received event.

    channel     Concatenated logical channel group and logical
                channel number for the virtual circuit associated
                with the event.

    remote dte  Address of the DTE that is the source of an incoming
                call or the destination of an outgoing call.

    retry       Specifies which retry counter has generated the event
                by reaching its maximum value.

                clear        The maximum clear attempts counter.

                reset        The maximum reset attempts counter.

                restart      The maximum restart attempts counter.

 o  switched virtual circuit failed

    Generated when an incoming or outgoing call fails in the setup or
    data phase.

    Arguments:

    call time   Time at which the call request was made.

    cause       Cause code provided by the DCE on reset.

    channel     Concatenated logical channel group and logical
                channel number for the virtual circuit associated
                with the event.

    diagnostic  Diagnostic code provided by the DCE on reset.

    direction   Direction of the call.

                incoming     The call was incoming.

                outgoing     The call was outgoing.

    failure     Reason why the circuit failed.
    reason
                call         The call was cleared by an invocation of
                cleared      the interface function.

                call         Call collision occurred.
                collision

                call         The call timer expired for an outgoing
                timeout      call attempt.

                dte          The local DTE was disabled by network
                disabled     management.

                level 2      A failure occurred at the Frame level
                failure      link or below.

                local        The X.25 Access module rejected an
                reject       incoming call attempt.

                network      A Clear packet with a network cause code
                clear        was received.

                no           Insufficient resources to handle call.
                resources

                no taker     Incoming call attempt rejected on
                             timeout with no response from X.25
                             Access module.

                remote       Disconnect initiated by network or
                reject       remote DTE.

                restart      A Restart packet was sent by the DCE.
                received

                security     An implementation-specific access
                             criterion was violated.

    remote dte  Address of the DTE that is the source of an incoming
                call or the destination of an outgoing call.

21.2  –  pvc

 o  pvc failed

    Generated when an allocated PVC fails during the data phase.

    Arguments:

    cause       Cause code provided by some DCEs on some failures.

    diagnostic  Diagnostic code provided by some DCEs on some
                failures.

    failure     Why the PVC failed.
    reason
                DTE          The local DTE was disabled by network
                disabled     management.

                level 2      A failure occurred at the Frame level
                failure      link or below.

                PVC          The x25 protocol dte pvc entity has been
                deleted      deleted by network management.

                restart      Restart initiated by network or remote
                             DTE, or sent by this DTE.

22  –  x25 relay (Alpha)

22.1  –  client

 o  connection failed

    Generated when a connection cannot be established.

    Arguments:

    call accept      Error returned when attempting to accept the
    reason           incoming call. This argument is present only
                     if Reason is Call Accept Failure.

                             cleared by directive
                             invalid parameter
                             no such port
                             service not available

    destination    DTE address of the called DTE.
    DTE

    destination    Called Address Extension supplied in the Call packet.
    nsap

    outgoing       Error returned when attempting to make the outgoing
    failure        call. This argument is present only if Reason is
    reason         Outgoing Call Failure.

                           called address not reachable
                           cleared by directive
                           destination not known
                           DTE class members not active
                           DTE class not known
                           DTE class not specified
                           incompatible reserved lcn
                           invalid parameter
                           no such port
                           no such template
                           security failure
                           service not available
                           transit not allowed

    reason         Whether the connection failed at the incoming or
                   outgoing stage.

                     call accept    The client could not accept the
                     failure        incoming call.

                     outgoing       The client could not make the
                     call failure   outgoing call.

    sending       DTE address of the calling DTE.
    DTE

    sending       Calling Address Extension supplied in the Call
    nsap          packet.

 o  connection lost

    Generated when a connection that has been successfully etablished
    is abnormally terminated.

    Arguments:

    cause        X.25 cause code provided by the clearing DTE. Only
                 present if the Reason argument is Calling DTE Clear
                 or Called DTE Clear.

    destination  DTE address of the called DTE.
    DTE

    destination  Called Address Extension supplied in the Call packet.
    nsap

    diagnostic   X.25 diagnostic code provided by the clearing DTE.
                 Only present if the Reason argument is Calling DTE
                 Clear or Called DTE Clear.

    network      Reason why the connection was lost. This argument is
    error        present only if reason is network error.
    reason

    reason       Reason for the loss of the connection.
                 calling      The local call was abnormally
                 DTE clear    terminated.
                 network      The cause of the connection loss is
                 error        given by network error reason.
                 called DTE   The remote call was abnormally
                 clear        terminated.

    sending      Specifies the DTE address of the calling DTE.
    DTE

    sending      Specifies the Calling Address Extension supplied in
    nsap         the Call packet.

22.2  –  pvc

 o  connection lost

    Generated when a successfully established PVC connection fails
    for some other reason than being disabled.

    Argument:

    reason      Error returned by the X.25 Access module when
                notifying the X.25 Relay module of the disconnection.

 o  retry limit exceeded

    Generated when an attempt to set up a PVC connection fails.

    Arguments:

    local pvc   State of the local end of the PVC connection.
    status

    relayed     State of the relayed end of the PVC connection.
    pvc status

23  –  x25_server

 o  client connect failed

    Generated when the X.25 server is unable to make a connection to
    an X.25 client (or to any of an alternative set of X.25 clients
    if the service nodes characteristic is supported for the x25
    server client entity).

    Arguments:

    client          Full name of the x25 server client entity.

    nodes           The node or set of nodes associated with the x25
                    server client entity.

    application     Application type in the client entity.

 o  session control unavailable

    Generated when the X.25 server detects the absence of the Session
    Control module or when it detects that the state of Session
    Control is not set to on.

    Arguments:

    module        True or false. Set to false when the X.25 Server
    extent        cannot detect the presence of Session Control. When
                  set false, the value of the session control port
                  state argument is always null.

    session       Null, off, shut, or restricted. Reflects the state
    control       returned by the Port State End User Interface when
    port state    the value of the module extent argument is set true.

24  –  xot (OpenVMS Alpha)

24.1  –  sap

 o  sap state changed

    The XOT SAP state has changed.  The new SAP state (on, off,
    or connecting to PWIP) is an argument for this event.

 o  sap inbound connect failed

    Indicates that an inbound connection attempt failed.  The
    event arguments are:  failure reason, remote ip address,
    remote port number, and pwip error code.  Possible connect
    failure reasons are:

    Remote System Unreachable
    Connection Rejected
    Connection Timed Out
    No Match for SAP Link
    Maximum Connections Exceeded
    Not Connected to PWIP
    PWIP Error
    No Reason Specified

24.1.1  –  link

 o  link state changed

    The XOT SAP LINK state has changed.  The new XOT SAP LINK
    state (on or off) is an argument for this event.

 o  outbound connect failed

    Occurs when an attempt to establish an outbound connection
    with a remote system fails.  The event returns the
    following arguments:  Failure Reason, Remote IP Address,
    Remote Port Number, and if the Failure Reason argument
    indicates a PWIP Error, PWIP Error Code.

    The Failure Reason agrument indicates why the connection
    could not be made, the argument takes one of the following
    values:

    Remote System     The XOT system could not reach the
    Unreachable       requested remote system.

    Connection        The XOT system was able to reach the
    Rejected          remote system.  However, the remote
                      system denied the connection request.

    PWIP Error        During the connection establishment
                      process the XOT system received an
                      unexpected error from the PWIP software
                      it uses.

    No Reason         The XOT system could not establish a
    Specified         connection with the requested remote
                      system.  No additional information is
                      available.

 o  protocol error

    Indicates an error occurred in the XOT protocol during a
    XOT protocol exchange with the remote system.  The event
    returns the following arguments:  Error Reason, Remote
    IP Address, Remote Port Number, and Received PDU.

    The Error Reason argument indicates what type of protocol
    error was detected; the argument takes one of the
    following values:

    Invalid XOT       The XOT system received a PDU apparently
    Header            destined for the XOT software, but the
                      XOT header was not valid.

    Invalid PVC       While attempting to establish a PVC
    Setup Packet      connection with the remote system, the
                      remote system returned an invalid
                      response PDU.  This error can also occur
                      if the remote system attempts to
                      establish a PVC connection with the
                      local system and the PVC connection PDU
                      is invalid.
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