IGMP proxying configuration example

As shown in Figure 40:

• PIM-DM runs on the core network.

• Host A and Host C on the stub network receive VOD information sent to multicast group 224.1.1.1.

Configure the IGMP proxying feature on Switch B so that Switch B can maintain group memberships and forward multicast traffic without running PIM-DM.

1. Assign an IP address and subnet mask to each interface, as shown in Figure 40. (Details not shown.)

2. Enable IP multicast routing, PIM-DM, IGMP, and IGMP proxying:

   # On Switch A, enable IP multicast routing.

   <SwitchA> system-view
   [SwitchA] multicast routing
   [SwitchA-mrib] quit
   

   # Enable PIM-DM on VLAN-interface 101.

   [SwitchA] interface vlan-interface 101
   [SwitchA-Vlan-interface101] pim dm
   [SwitchA-Vlan-interface101] quit
   

   # Enable IGMP on VLAN-interface 100.

   [SwitchA] interface vlan-interface 100
   [SwitchA-Vlan-interface100] igmp enable
   [SwitchA-Vlan-interface100] quit
   

   # On Switch B, enable IP multicast routing.

   <SwitchB> system-view
   [SwitchB] multicast routing
   [SwitchB-mrib] quit
   

   # Enable IGMP proxying on VLAN-interface 100.

   [SwitchB] interface vlan-interface 100
   [SwitchB-Vlan-interface100] igmp proxy enable
   [SwitchB-Vlan-interface100] quit
   

   # Enable IGMP on VLAN-interface 200.

   [SwitchB] interface vlan-interface 200
   [SwitchB-Vlan-interface200] igmp enable
   [SwitchB-Vlan-interface200] quit
   

# Display multicast group membership information maintained by the IGMP proxy on Switch B.

[SwitchB] display igmp proxy group
IGMP proxy group records in total: 1
 Vlan-interface100(192.168.1.2):
  IGMP proxy group records in total: 1
   Group address      Member state      Expires
   224.1.1.1          Delay             00:00:02