A table of station addresses known at an
individual port. This table is designed to reduce
the number of SNMP GETNEXT requests. This is done
by packing many values into an octet string. (The
maximum size frame should be used to return the
result.) The instance returned for a GETNEXT is
the value that identifies the last 'row' in the
octet string. When the table is completely
retrieved with one or more GETNEXTs, duplicate
entries may be present, and entries may be skipped
if the table is changing while being retrieved.