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4.6 Multicast
The Multicast of the Switch
On this field: included IGMP Snooping and Bridge Multicast.
4.6.1 IGMP Snooping
When IGMP Snooping (see figure 4-24) is enabled globally, all IGMP packets are forwarded to the CPU.
The CPU analyzes the incoming packets and determines which ports want to join which Multicast groups,
which ports have Multicast routers generating IGMP queries, 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.
Figure 4-24 IGMP Snooping screen
The page contains the following fields:
• Set IGMP Snooping Indicates if IGMP Snooping is enabled or Disabled on the device.
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