Configuring Multicast Forwarding
Configuring IGMP Snooping
Page 103
When IGMP Snooping 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.
To configure IGMP Snooping:
1. Click Multicast > IGMP. The IGMP Page opens:
Figure 62: IGMP Page
The IGMP Page contains the following fields:
•Enable IGMP Snooping Status — Indicates if IGMP Snooping is enabled on the device. IGMP Snooping
can be enabled only if Bridge Multicast Filtering is enabled. The possible field values are:
–Checked — Enables IGMP Snooping on the device.
–Unchecked — Disables IGMP Snooping on the device.
•VLAN ID — Specifies the VLAN ID.
•IGMP Snooping Status — Indicates if IGMP Snooping is enabled on the VLAN.
The possible field values are: