Description: The table containing current IGMP information which have been captured by this device, provided that swL2DevCtrlIGMPSnooping and swL2IGMPCtrlState of associated VLAN entries are all enabled. Note that the priority of IGMP table entries is lower than the Filtering Table, i.e. if there is a table hash collision between the entries of the IGMP Table and the Filtering Table inside the switch H/W address table, the Filtering Table entry will overwrite the colliding entry of the IGMP Table. See swL2FilterMgmt description also.