1-17Configuring Source IP Address of IGMP QueriesUpon receiving an IGMP query whose source IP address is 0.0.0.0 on a port, the switch does not enlistthat port as a dynamic router port. This may prevent multicast forwarding entries from being correctlycreated at the data link layer and cause multicast traffic forwarding failure in the end. When a Layer 2device acts as an IGMP-Snooping querier, to avoid the aforesaid problem, you are commended toconfigure a non-all-zero IP address as the source IP address of IGMP queries.Follow these steps to configure source IP address of IGMP queries:To do... Use the command... RemarksEnter system view system-view —Enter VLAN view vlan vlan-id —Configure the source addressof IGMP general queriesigmp-snooping general-query source-ip{ ip-address | current-interface }Optional0.0.0.0 by defaultConfigure the source IPaddress of IGMP group-specificqueriesigmp-snooping special-query source-ip{ ip-address | current-interface }Optional0.0.0.0 by defaultThe source address of IGMP query messages may affect IGMP querier selection within the segment.Configuring IGMP Snooping ProxyingConfiguration PrerequisitesBefore configuring IGMP snooping Proxying in a VLAN, enable IGMP snooping in the VLAN andprepare the following data:z Source IP address for the IGMP reports sent by the proxyz Source IP address for the IGMP leave messages sent by the proxyEnabling IGMP Snooping ProxyingThe IGMP snooping Proxying function works on a per-VLAN basis. After you enable the function in aVLAN, the device works as the IGMP snooping proxy for the downstream hosts and upstream router inthe VLAN.Follow these steps to enable IGMP snooping Proxying in a VLAN:To do... Use the command... RemarksEnter system view system-view —Enter VLAN view vlan vlan-id —Enable IGMP snoopingProxying in the VLANigmp-snooping proxyingenableRequiredDisabled by default.
