H3C S7500 Series Ethernet Switches Operation Manual

Operation Manual – Multicast
H3C S7500 Series Ethernet Switches Chapter 6
IGMP Configuration
6-12
After the configuration of IGMP Proxy on the Layer 3 switch of the leaf network, the leaf
Layer 3 switch is just a host for the external network. Only when the Layer 3 switch has
directly connected members, can it receive the multicast data of corresponding groups.
Follow these steps to configure IGMP Proxy:
To do... Use the command... Remarks
Enter system view
system-view
—
Enable the multicast
routing protocol
multicast
routing-enable
Required
Enter VLAN interface
(which is connected to the
external network) view
interface Vlan-interface
interface-number
—
Enable the IGMP protocol
igmp enable
Required
By default, if the IP
multicast routing protocol
is enabled globally, IGMP
is enabled on all the
layer-3 interfaces
automatically.
Configure IGMP Proxy
igmp proxy
Vlan-interface
interface-number
Required
The IGMP Proxy feature is disabled by default.
Caution:
z Both the multicast routing protocol and the IGMP protocol must be enabled on the
proxy interface.
z You must enable the PIM protocol on the interface before configuring the igmp
proxy command. Otherwise, the IGMP Proxy feature does not take effect.
z Only one IGMP proxy interface can be configured for one interface.
6.2.6 Configuring Suppression on IGMP Report Messages
When a Layer 2 switch receives an IGMP report message from a host in a multicast
group, the switch will forward the message to the Layer 3 switch port connecting to it. If
there are multiple hosts in a multicast group, the Layer 3 switch will receive the same
IGMP report messages from multiple hosts in a multicast group.