H3C Technologies H3C S3600 Series Switches - Manual (Page 399)

3-6
Enable multicast routing, and then enable PIM and IGMP on VLAN-interface 1 and VLAN-interface 2.
Run the igmp proxy command on VLAN-interface 1 to configure it as the proxy interface for
VLAN-interface 2.
Configure Switch A as follows:
z Enable multicast routing, enable IGMP and PIM on VLAN-interface 1.
z Configure the pim neighbor-policy command to filter PIM neighbors in the network segment
33.33.33.0/24. That is, Switch A does not consider Switch B as its PIM neighbor.
In this case, when Switch B of the stub network receives from VLAN-interface 2 an IGMP join or IGMP
leave message sent by the host, it changes the source address of the IGMP information to the address
of VLAN-interface 1, 33.33.33.2, and sends the information to VLAN-interface 1 of Switch A. For Switch
A, this works as if there is a host directly connected to VLAN-interface 1.
Similarly, when Switch B receives the IGMP general or group-specific query message from the Layer 3
Switch A, Switch B also changes the source address of the query message to the IP address of
VLAN-interface 2, 22.22.22.1, and send the message from VLAN-interface 2.
Configuring IGMP
IGMP Configuration Task List
Complete the following tasks to configure IGMP:
Task Remarks
Enabling IGMP Required
Configuring IGMP Version Optional
Configuring Options Related to IGMP Query Messages Optional
Configuring the Maximum Allowed Number of Multicast Groups Optional
Configuring a Multicast Group Filter Optional
Configuring Simulated Joining Optional
Configuring IGMP Proxy Optional
Removing Joined IGMP Groups from an Interface Optional
Enabling IGMP
First, IGMP must be enabled on the interface on which the multicast group memberships are to be
established and maintained.
Follow these steps to enable IGMP:
To do... Use the command... Remarks
Enter system view system-view —
Enable IP multicast routing multicast routing-enable Required
Enter interface view
interface interface-type
interface-number
—
Enable IGMP igmp enable
Required
Disabled by default