A summary of VLAN membership of non-trunk
bridge ports. This table is used for
retrieving VLAN membership information
for the device which supports dot1dBasePort
with value greater than 2048.
A row is created for a VLAN and a particular
bridge port range, where at least one port
in the range is assigned to this VLAN.
VLAN membership can only be modified via the
vmMembershipTable.