Configuring Multicast Forwarding
IGMP Snooping
Cisco Small Business SFE/SGE Managed Switches Administration Guide
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Configuring Multicast Forwarding
The Multicast section contains the following topics:
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IGMP Snooping
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Defining Multicast Group
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Configuring IGMP Snooping Mapping
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Defining Multicast TV Membership
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Defining Multicast Forwarding
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Defining Unregistered Multicast Settings
IGMP Snooping
When IGMP Snooping is enabled globally, all IGMP packets are forwarded to the
CPU. The CPU analyzes the incoming packets and determines:
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Which ports want to join which Multicast groups.
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Which ports have Multicast routers generating IGMP queries.
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Which routing protocols are forwarding packets and Multicast traffic.
Ports requesting to join a specific Multicast group issue an IGMP report,
specifying that Multicast group is accepting members. This results in the creation
of the Multicast filtering database.
To enable IGMP Snooping: