"With IGMP snooping configured, the switch listens to and analyzes IGMP packets exchanged between multicast users and the upstream router, and creates Layer 2 multicast forwarding entries based on IGMP packet information. Multicast data packets are then forwarded based on the Layer 2 multicast forwarding entries, instead of being broadcast on the Layer 2 network. For example, to enable IGMP snooping in VLAN 10 on an S series switch, except S1700, run the following commands: [HUAWEI] igmp-snooping enable //Enable IGMP snooping globally. [HUAWEI] vlan 10 [HUAWEI-vlan10] igmp-snooping enable //Enable IGMP snooping in the VLAN."
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