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Common Operation Guide

CloudEngine 12800, 12800E, 8800, 7800, 6800, and 5800 Series Switches

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Configuring Layer 2 Multicast

Configuring Layer 2 Multicast

When a CE series switch acts as a Layer 2 switch, it broadcasts all multicast packets passing through it in a broadcast domain by default. Therefore, all hosts in the same broadcast domain receive the multicast packets, regardless of whether they are group members. This causes a waste of network bandwidth and brings security risks.

This problem can be solved by configuring IGMP snooping on the Layer 2 multicast switch. 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.

# Configure IGMP snooping in VLAN 10.

<HUAWEI> system-view
[~HUAWEI] igmp snooping enable   //Enable IGMP snooping globally.
[*HUAWEI] vlan 10
[*HUAWEI-vlan10] igmp snooping enable   //Enable IGMP snooping in the VLAN (broadcast domain).
[*HUAWEI-vlan10] commit
Updated: 2018-10-08

Document ID: EDOC1000102369

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