IGMPv3 multicast routers

When multicast routers use IGMPv3, it is enough to only enable IGMP snooping, without any further modification of parameters.

The following displays an example of an IGMP snooping configuration:

A:ALA-48>config>service>vpls# info
----------------------------------------------
            igmp-snooping
                no shutdown
            exit
            no shutdown
----------------------------------------------
A:ALA-48>config>service>vpls#