igmp-snooping enable (system view)
Function
The igmp-snooping enable command enables IGMP snooping globally.
The undo igmp-snooping enable command disables IGMP snooping globally.
By default, IGMP snooping is disabled globally.
Usage Guidelines
Usage Scenario
IGMP snooping runs on a Layer 2 device between a Layer 3 multicast device and hosts. By listening on the multicast protocol packets exchanged between the Layer 3 device and hosts, IGMP snooping maintains a multicast forwarding table to control Layer 2 multicast forwarding.
Before configuring IGMP snooping parameters, run the igmp-snooping enable command in the system view to enable IGMP snooping globally. Other IGMP snooping configuration commands can be used only after IGMP snooping is enabled globally.
Precautions
When you run the undo igmp-snooping enable command in the system view, the system displays a message, asking you whether to disable IGMP snooping globally. When you disable IGMP snooping globally, all the IGMP snooping configuration are deleted. When you run the igmp-snooping enable command to enable IGMP snooping globally again, the wireless access controller uses the default IGMP snooping configuration.
When multicast services are enabled, the multicast services may be affected if rate limit for multicast packets is enabled on an AP. In this case, you are advised to run the traffic-optimize broadcast-suppression rate-threshold (AP system profile view) command to adjust the rate limit threshold for multicast packets.
