o  client

    Name specified by the data link user when the port was opened.

 o  ethernet protocol types

    Set of Ethernet protocol types that are currently recognized for
    this port.

 o  length present

    The data link adds (1) a length field on transmit frames, and (2)
    assumes the presence of a length field and attempts to remove it
    on received Ethernet frames. When false, the data link does not
    add and remove length fields. This attribute is irrelevant for
    ISO 8802-3 formatted frames, which always have a length field.

    false The data link does not add and remove length fields.
    true  The data link adds and removes length fields.

 o  llc sap addresses

    Set of individual and group logical link control (LLC) service
    access point (SAP) addresses that are currently recognized for
    this port.

 o  llc service

    Type of LLC (logical link control) PDU processing that is
    required on the port (as defined by the user when the port was
    opened).

    class 1        The data link provides class 1, type 1 service.

    user-          The user is responsible for handling the LLC
    supplied       protocol.

 o  mac addresses

    Set of individual and multicast MAC (medium access control)
    addresses that are currently recognized for this port.

 o  receive mode

    Type of receive mode that is currently enabled for the port.

    normal         The port receives only those frames that meet the
                   normal address and protocol filtering requirements
                   requested by the user.

    promiscuous    The port receives all frames regardless of format
                   and MAC address.

 o  snap protocol identifiers

    Set of subnetwork access protocol (SNAP) identifiers that are
    currently recognized for this port.

 o  station

    Name of the station associated with this port as specified by the
    user when the port was opened.

 o  uid

    Entity's unique identifier, which is generated when the port is
    created.