o  creation time

    Time at which the port subentity was created.

 o  multicast octets received

    Number of multicast user data octets successfully received and
    available to the data link user.  This counter is optional.

 o  multicast octets sent

    Number of multicast user data octets successfully transmitted
    using the port. This counter is optional.

 o  multicast pdus received

    Total number of multicast frames successfully received and
    available the data link user.

 o  multicast pdus sent

    Number of multicast frames successfully transmitted using the
    port. This counter is optional.

 o  octets received

    Total number of user data octets successfully received and
    available to the data link user. This counter is optional.

 o  octets sent

    Number of user data octets successfully transmitted using the
    port. This counter is optional.

 o  pdus received

    Total number of frames successfully received and available
    to the data link user.

 o  pdus sent

    Total number of user frames successfully transmitted using
    the port.

 o  unavailable user buffers

    Number of times no user buffer was available at the port for an
    incoming frame.