The set of physical ports to which this entry is contained in
the L2 tables. Each octet within the value of this
object specifies a set of eight ports.
The first octet specifying ports 1 through 8,
the second octet specifying ports 9 through 16, etc.
Within each octet, the least
significant bit represents the lowest numbered
port and the most significant bit represents the
highest numbered port. Thus, each port of the
bridge is represented by a single bit within the
value of this object. If that bit has a value of
'1' then that port is included in the set of
ports; the port is not included if its bit has a
value of '0'. (Note that the setting of the bit
corresponding to the port from which a frame is
received is irrelevant.) The default value of
this object is a string of zeroes of appropriate
length. The maximum number of ports/card-module
is sysHwModuleNumPorts.