The LLC2 entity represents the LLC2 protocol on the Peer Server and its accessibility by client applications. The LLC2 module controls the operation of the LLC Type 2 data link protocol for local area networks (LANs). The Peer Server supports a single instance of the LLC2 entity. The subordinate entities of the LLC2 entity are the Port and the SAP (service access point). The Port subentity exists when an LLC2 connection is established to an adjacent link station. Ports are dynamically created and deleted as connections are made and broken. An instance of the SAP subentity must exist for each LLC2 port. The SAP subentity is the access point to the underlying LAN station. There is one SAP for each protocol on the LAN adapter. The SAP entity has the Link subentity, which represents a remote LAN station and its associated SAP.
1 – create
create llc2 The create llc2 command creates an LLC2 entity, which provides support for LLC Type 2 data link protocol for local area networks. There is only one instance for each node. Ex, ncl> create llc2
2 – delete
delete llc2 The delete llc2 command deletes the single LLC2 entity. You cannot delete the entity while subentities (Ports and SAPs) exist. Ex, ncl> delete llc2
3 – show
show llc2 The show llc2 command displays the attributes of the LLC2 entity. Ex, ncl> show llc2 all
3.1 – Characteristic
version Displays the version number of the SNA LLC2
software that is executing.
4 – SAP subentity
An instance of the SAP subentity must exist for each LLC2 port. The SAP (service access point) subentity is the access point to the underlying LAN station. There is one SAP for each protocol on the LAN adapter.
4.1 – create
create llc2 sap The create llc2 sap command creates an instance of the LLC2 SAP subentity for each protocol that LLC2 uses. The create command also allocates resources for the subentity and sets its characteristics to their default values. Ex, ncl> create llc2 sap sna-0
4.2 – delete
delete llc2 sap The delete llc2 sap command deletes a named LLC2 SAP instance. You can delete a SAP instance only when it has no active Link subentities and it is disabled. Ex, ncl> delete llc2 sap sna-0
4.3 – disable
disable llc2 sap The disable llc2 sap command disables a named LLC2 SAP instance. Ex, ncl> disable llc2 sap sna-0
4.4 – enable
enable llc2 sap The enable llc2 sap command enables a named LLC2 SAP instance. Ex, ncl> enable llc2 sap sna-0
4.5 – set
set llc2 sap The set llc2 sap command lets you set the attributes for the LLC2 SAP subentity. Ex, ncl> set llc2 sap sna-0 lan station token ring station trn-0
4.5.1 – Characteristics
LAN Station Local entity Specifies the name of the LAN station
entity used by the name SAP. You must
specify this value before trying to
enable the SAP.
Local LSAP 2 characters Specifies the local link service
Address (hexadecimal) access point (LSAP) to be
used. The address must be unique.
For use with the Peer Server, this
value is normally set to 04.
4.6 – show
show llc2 sap The show llc2 sap command displays the attributes for the LLC2 SAP subentity. Ex, ncl> show llc2 sap sna-0 all
4.6.1 – Identifier
Name Displays the simplename assigned when the LLC2 SAP was
created.
4.6.2 – Status
State Displays the entity state of the LLC2 SAP entity.
Possible values are:
off The SAP is disabled.
on The SAP is enabled.
LAN Port Displays the name of the LAN Port that is
opened and enabled when this SAP is successfully
enabled. The status has a null value if the SAP
is not enabled.
Maximum PDU Displays the largest frame size, in octets, that
Size can be used to send or receive data on this SAP.
UID Displays the entity's unique identifier that was
assigned when the entity was created.
4.6.3 – Characteristics
LAN Station Local entity Displays the name of the LAN station
entity used by the name SAP. You must
specify this value before trying to
enable the SAP.
Local LSAP 2 characters Displays the local link service
Address (hexadecimal) access point (LSAP) to be used.
4.6.4 – Counters
Creation Displays the time that the entity was created. Time Times SAP Displays the number of times the SAP state has State Changed changed from on to off, or from off to on.
5 – SAP Link subentity
The Link subentity of the SAP represents a remote LAN station and its associated SAP.
5.1 – create
create llc2 sap link The create llc2 sap link command creates a link to a remote LAN station that operates over a particular service access point (SAP). Ex, ncl> create llc2 sap sna-0 link link-2
5.2 – delete
delete llc2 sap link The delete llc2 sap link command deletes a named LLC2 SAP Link instance. You can delete a SAP Link instance only when it is disabled and the transmission group that uses it is disabled. Ex, ncl> delete llc2 sap sna-0 link link-2
5.3 – disable
disable llc2 sap link The disable llc2 sap link command disables a named LLC2 SAP Link instance. Ex, ncl> disable llc2 sap sna-0 link link-2
5.4 – enable
enable llc2 sap link The enable llc2 sap link command makes a named LLC2 SAP Link instance available for connections. Ex, ncl> enable llc2 sap sna-0 link link-2
5.5 – set
set llc2 sap link The set llc2 sap link command lets you set the attributes for the LLC2 SAP Link subentity. Ex, ncl> set llc2 sap sna-0 link link-2 acknowledge timer = 2000
5.5.1 – Characteristics
Acknowledge (1-60000) Specifies the time (in milliseconds)
Timer that the link waits for an
acknowledgment before initiating
recovery action. The default is 1000.
Holdback Timer (0-60000) Specifies the delay (in milliseconds)
before an acknowldgment must be sent.
The default is 500.
Maximum (1-65531) Specifies the largest frame size (in
Data Size octets) that the link can use to send
or receive data. This value does not
include the size of the frame header.
The default is 1028.
Local Receive (1-127) Specifies the size of the window used
Window Size by the link for receiving frames. The
default is 127.
Retry Maximum (1-255) Specifies the maximum number of times
that the link retransmits a frame
before assuming a fatal error and
taking more drastic recovery action.
The default is 10.
Remote Mac LAN Specifies the unique destination MAC
Address address address to be used by the link. The
default is 00-00-00-00-00-00.
Remote LSAP 2 character Specifies the unique address of the
Address (hexa- destination LSAP (local service
decimal) access point) to be used by the link.
For use with the Peer Server, this
value is normally set to 04.
5.6 – show
show llc2 sap link The show llc2 sap link command displays the attributes for a link that operates over a particular service access point (SAP). Ex, ncl> show llc2 sap sna-0 link link-2 all
5.6.1 – Identifier
Name Displays the Simplename assigned to the link when it
was created.
5.6.2 – Status
Active Maximum Displays the negotiated maximum frame size
Data Size (excluding the header) that can be sent and
received on this link. The value is the
smallest maximum data size of the Link, the
SAP, and the adjacent link.
State Displays the entity state of the llc2 link.
Possible values are:
off The link is disabled.
on The link is enabled.
Protocol Displays the state of the LLC2 protocol with
State respect to the remote station. Possible
states are:
error The protocol is in a recognized error state.
disconnecting The protocol is being disconnected.
halted The protocol has halted.
initializing The protocol is being initialized.
inoperative The protocol cannot be started because the LAN
station cannot provide a connection to a remote
station.
resetting The protocol is being reset.
running The protocol is running normally.
Remote LLC Class Displays the class of the remote LLC.
Possible classes are:
1 Class 1 LLC. Only type 1 operation is
supported.
2 Class 2 LLC. Both type 1 and type 2
operations are supported.
unknown The class has not yet been established. The
class is established during XID exchange
between the local and remote LLC
implementations.
Remote Receive Displays the window size used by the remote
Window Size station for receiving frames. The local
station uses this value as its window for
transmitting frames.
UID Displays the unique identifier of the entity,
which is generated when the entity is created.
5.6.3 – Characteristics
Acknowledge (1-60000) Displays the time (in milliseconds)
Timer that the link waits for an
acknowledgment before initiating
recovery action.
Holdback Timer (0-60000) Displays the delay (in milliseconds)
before an acknowledgment must be sent.
Maximum (1-65531) Displays the largest frame size (in
Data Size octets) that the link can use to send
or receive data. This value does not
include the size of the frame header.
Local Receive (1-127) Displays the size of the window used
Window Size by the link for receiving frames.
Retry Maximum (1-255) Displays the maximum number of times
that the link retransmits a frame
before assuming a fatal error and
taking more drastic recovery action.
Remote MAC LAN Displays the unique destination MAC
Address address address to be used by the link.
Remote LSAP 2 characters Displays the unique address of the
Address (hexa- destination LSAP (local service
decimal) access point) to be used by the link.
5.6.4 – Counters
Data Octets Displays the number of data octets received in
Received I-frames and UI-frames from the remote end of the
link. This value does not include retransmissions.
Data Octets Displays the number of data octets sent in
Sent I-frames and UI-frames to the remote end of the
link. This value does not include retransmissions.
Data PDUs Displays the number of I-frames and UI-frames
Received received from the remote end of the link. This
value does not include retransmissions.
Data PDUs Displays the number of I-frames and UI-frames sent
Sent to the remote end of the link. This value does
not include retransmissions.
REJs Received Displays the number of REJ (reject) frames
received.
REJs Sent Displays the number of REJ (reject) frames
transmitted.
RNRs Received Displays the number of RNR (receive not ready)
frames received.
RNRs Sent Displays the number of RNR (receive not ready)
frames transmitted.
XIDs Received Displays the number of XID frames received.
XIDs Sent Displays the nubmer of XID framed transmitted.
FRMRs Received Displays the number of FRMR (frame reject) frames
received.
FRMRs Sent Displays the number of FRMR (frame reject) frames
generated as a result of invalid incoming frames.
Polls Received Displays the number of command frames received
with the P-bit set.
Times Acknowledge Displays the number of times the local acknowledge
Timer Expired timer has expired.
Times Poll Displays the number of times the local poll timer
Timer Expired has expired.
Times Reject Displays the number of times the local reject
Timer Expired timer has expired.
Times Busy Displays the number of times the local busy timer
Timer Expired has expired.
Times Link Displays the number of times the link's state
State Changed changed from on to off, or from off to on.
Times Link Displays the number of times the link's protocol
Running state status attribute was set to running. When
the link enters the running state, the protocol
has been successfully initialized or reset.
Times Link Displays the number of times the link's protocol
Initializing state status attribute was set to initializing.
Times Link Displays the number of times the link's protocol
Resetting state status attribute was set to resetting.
Times Link Displays the number of times the link's protocol
Halted state status attribute was set to halted.
Times Link Displays the number of times the link's protocol
Inoperative state status attribute was set to inoperative.
Times Link Displays the number of times the LLC2 fails to
Setup Failed initialize correctly after the maximum number of
retries.
Creation Time Displays the time at which the entity was created.
6 – Port subentity
The Port subentity exists when an LLC2 connection is established to an adjacent link station. Ports are dynamically created and deleted as connections are made and broken.
6.1 – show
show llc2 port The show llc2 port command displays the attributes of the LLC2 Port entity. Ex, ncl> show llc2 port llc2-port-000 all
6.1.1 – Identifier
name A unique value assigned to the Port by the LLC2
entity. The value is in the form LLC2-port-nnn,
where nnn is an unsigned integer.
6.1.2 – Status
Client Displays the name of the client that opened the
port.
Link Displays the name of the SAP Link entity
associated with this port.
State Displays the entity state of the port. Possible
state values are:
open The port is assigned to a client and is enabled.
open disabled The port is assigned to a client but is disabled.