Allied Telesis AT-8000GS User's Guide Page 124

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Configuring Multicast Forwarding
Page 124
Configuring IGMP Snooping
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 91: 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.
IGMP Snooping VersionDisplays the IGMP Snooping version enabled on the device. The possible field
values are:
IGMPv2 — Indicates that IGMP version 2 is enabled on the device.
IGMPv3 — Indicates that IGMP version 3 is enabled on the device.
VLAN ID — Specifies the VLAN ID.
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