Configuring igmp snooping, Overview, Recommended configuration procedure – H3C Technologies H3C WX3000E Series Wireless Switches User Manual
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Configuring IGMP snooping
Overview
IGMP snooping runs on a Layer 2 switch as a multicast constraining mechanism to improve multicast
forwarding efficiency. It creates Layer 2 multicast forwarding entries from IGMP packets that are
exchanged between the hosts and the router.
As shown in
, when IGMP snooping is not enabled, the Layer 2 switch floods multicast packets
to all hosts. When IGMP snooping is enabled, the Layer 2 switch forwards multicast packets of known
multicast groups to only the receivers.
Figure 145 Multicast forwarding before and after IGMP snooping runs
For more information about IGMP snooping, see "
About the H3C Access Controllers Web-Based
Recommended configuration procedure
Step Remarks
1. Enabling IGMP snooping globally
Required.
By default, IGMP snooping is disabled.
- H3C WX5500E Series Access Controllers H3C WX3500E Series Access Controllers H3C WX2500E Series Access Controllers H3C WX6000 Series Access Controllers H3C WX5000 Series Access Controllers H3C LSUM3WCMD0 Access Controller Module H3C LSUM1WCME0 Access Controller Module H3C LSRM1WCM2A1 Access Controller Module