This MIB module defines objects that describe IGMP/MLD
snooping.
It provides remote network management system the ability
to manage the IGMP/MLD Snooping feature when snooping is
operating at the system and port level.
        
Virtual systems and related ports data can be accessed by 
NMS using appropriate SNMP context. 
E.g. in order to access data related to a particular L2VPN 
bridge domain system, the user shall specify on the SNMP 
request the SNMP context related to that particular bridge 
domain.
        
Glossary of terms:
        
GMI - Group Management Interval; it controls when the IGMP/MLD 
      snooping expires stale group membership states. 
L2VPN - Layer 2 Virtual Private Network.
IGMP - Internet Group Management Protocol.
MLD - Multicast Listener Discovery.
MRT - Max Response Time.
TTL - Time To Live.
PIM - Protocol Independent Multicast.
TCN - Topology Change Notification.
Querier - External IGMP/MLD router sending out queries which 
          are flooded in the system (e.g a bridge domain).
Internal Querier - Virtual Querier that solicits periodic 
                   membership reports by sending IGMP/MLD 
                   general queries out of all system ports.
Winner/Looser Querier - A system can only have one active 
                        querier at a time, if the internal 
                        querier receives queries from another 
                        querier it performs querier election, 
                        the lowest IP address wins.
G-Query - General IGMP/MLD Query.
Solicitation - a global leave message with a NULL group 
               multicast address, when the upstream router 
               receives this solicitation, it immediately issues
               an general query.