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S2989G-24TX Operation Manual

Chapter 5 Multicast Protocol Related Configuration

4-44

Multicast

Router

Multicast

Server

Multicast

Router

IGMP PROXY

Switch 2

IGMP PROXY

Switch 1

IGMP PROXY

Switch 3

Figure 5-5 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

downstream ports. Three IGMP Proxy enabled switches which are connected in tree

topology, respectively have one port connected to multicast routers, and no less than one

ports connected to hosts or upstream ports from other IGMP proxy enabled switches.

The configuration steps are listed below:

IGMP PROXY Switch1 configuration：

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

Switch(Config-if-Vlan2)#ip igmp proxy multicast-source

Route1 configuration:

Switch#config

Switch(config)#ip pim multicast

Switch(Config)#interface vlan 1

Switch(Config-if-Vlan1)#ip pim sparse-mode

Switch(Config-if-Vlan1)#ip pim bsr-border