Brocade Multi-Service IronWare Multicast Configuration Guide (Supporting R05.6.00) - Manual (Page 120)

108 Multi-Service IronWare Multicast Configuration Guide
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IGMP V3
1
To add a static route to a virtual interface, enter commands such as the following.
Brocade(config)# ip mroute 0.0.0.0 0.0.0.0 ve 1 distance 1
Brocade(config)# write memory
IGMP V3
The Internet Group Management Protocol (IGMP) allows an IPv4 system to communicate IP
Multicast group membership information to its neighboring routers. The routers in turn limit the
multicast of IP packets with multicast destination addresses to only those interfaces on the router
that are identified as IP Multicast group members.
In IGMP V2, when a router sent a query to the interfaces, the clients on the interfaces respond with
a membership report of multicast groups to the router. The router can then send traffic to these
groups, regardless of the traffic source. When an interface no longer needs to receive traffic from a
group, it sends a leave message to the router which in turn sends a group-specific query to that
interface to see if any other clients on the same interface is still active.
In contrast, IGMP V3 provides selective filtering of traffic based on traffic source. A router running
IGMP V3 sends queries to every multicast enabled interface at the specified interval. These general
queries determine if any interface wants to receive traffic from the router. The following are the
three variants of the Query message: