H3C Technologies H3C S3100V2 Series Switches - Manual (Page 25)

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IGMP message Actions
Report
When receiving a report for a multicast group, the proxy looks up the
multicast forwarding table for the entry for the multicast group. If the
forwarding entry is found with the receiving port contained as a
dynamic member port in the outgoing port list, the proxy resets the
aging timer for the entry. If the forwarding entry is found but the
outgoing port list does not include the receiving port, the proxy adds the
port to the outgoing port list as a dynamic member port and starts an
aging timer for it. If no forwarding entry is found, the proxy creates the
entry, adds the receiving port to the outgoing port list as a dynamic
member port and starts an aging timer for the port, and then, sends a
report to the group out all router ports.
Leave
In response to an IGMP leave message for a multicast group, the proxy
sends a group-specific query out the receiving port. After making sure
that no member port is contained in the forwarding entry for the
multicast group, the proxy sends a leave message to the group out all
router ports.
Protocols and standards
• RFC 4541, Considerations for Internet Group Management Protocol (IGMP) and Multicast Listener
Discovery (MLD) Snooping Switches
IGMP snooping configuration task list
Complete these tasks to configure IGMP snooping:
Task Remarks
Enabling IGMP snooping Required
Configuring the version of IGMP snooping Optional
Configuring basic functions of
IGMP snooping
Configuring static multicast MAC address entries Optional
Configuring aging timers for dynamic ports Optional
Configuring static ports Optional
Configuring simulated joining Optional
Configuring fast leave processing Optional
Configuring IGMP snooping
port functions
Disabling a port or a group of ports from changing into
dynamic router ports
Optional
Enabling IGMP snooping querier Optional
Configuring IGMP queries and responses Optional
Configuring IGMP snooping
querier
Configuring source IP address of IGMP queries Optional
Enabling IGMP snooping proxying Optional
Configuring IGMP snooping
proxying
Configuring a source IP address for the IGMP messages
sent by the proxy
Optional
Configuring a multicast group filter Optional Configuring an IGMP snooping
policy
Configuring multicast source port filtering Optional