H3C Technologies H3C WX3000 Series Unified Switches - Manual (Page 434)

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If any IGMP report in response to the group-specific query arrives to the member port before its
aging timer expires, this means that some other members of that multicast group still exist under
that port: the device resets the aging timer of the member port.
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If no IGMP report in response to the group-specific query arrives to the member port before its
aging timer expires as a response to the IGMP group-specific query, this means that no members
of that multicast group still exist under the port: the device deletes the forwarding entry
corresponding to the port from the forwarding table when the aging timer expires.
After a device enables IGMP Snooping, when it receives the IGMP leave message sent by a host in a
multicast group, it judges whether the multicast group exists automatically. If the multicast group does
not exist, the device drops this IGMP leave message.
IGMP Snooping Configuration
IGMP Snooping Configuration Task List
Complete the following tasks to configure IGMP Snooping:
Operation Remarks
Enabling IGMP Snooping Required
Configuring the Version of IGMP Snooping Optional
Configuring Timers Optional
Configuring Fast Leave Processing Optional
Configuring a Multicast Group Filter Optional
Configuring the Maximum Number of Multicast Groups on a Port Optional
Configuring IGMP Querier Optional
Suppressing Flooding of Unknown Multicast Traffic in a VLAN Optional
Configuring Static Member Port for a Multicast Group Optional
Configuring a Static Router Port Optional
Configuring a Port as a Simulated Group Member Optional
Configuring a VLAN Tag for Query Messages Optional
Configuring Multicast VLAN Optional
Enabling IGMP Snooping
Follow these steps to enable IGMP Snooping:
To do… Use the command… Remarks
Enter system view system-view —