User's Manual

Configuration Guide of XGS-5240-Series
42-22
The configuration steps are listed below:
Switch#config
Switch(config)#ip igmp proxy
Switch(Config)#interface vlan 1
Switch(Config-if-Vlan1)#ip igmp proxy upstream
Switch(Config)#interface vlan 2
Switch(Config-if-Vlan2)#ip igmp proxy downstream
Multicast Configuration:
Suppose the multicast server offers some programs through 224.1.1.1. Some hosts
subscribe that program at the edge of the network. The IGMP multicast members repo
rt themselves to the downstream ports of IGMP Proxy enabled Switch 2 and Switch 3.
Switch 2 and Switch 3 then aggregate the group membership information and send the
m through the upstream ports. Switch 1 finally forward these membership information to
the multicast router when receiving the group membership information through upstrea
m ports, and deliver the multicast dataflow through downstream ports.
Example2: IGMP Proxy for multicast sources from downstream ports.
Fig 1-5 IGMP Proxy for multicast sources from downstream ports
As it is show in the figure above, IGMP Proxy enabled switches connected to the
network in tree topology. The multicast source server connects to the downstream port
of Switch1, the multicast dataflow is distributed through the upstream port and other do
Multicast
Server
Multicast
Router
IGMP PROXY
Switch 2
IGMP PROXY
Switch 1
IGMP PROXY
Switch 3
Multicast
Router