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Chapter 10: Configuring Multicast Forwarding
IGMP Snooping
SFE1000P Gigabit Ethernet Switch Administration Guide
Chapter
10
Configuring Multicast Forwarding
The Multicast section contains the following pages:
• IGMP Snooping
• Defining Multicast Bridging Groups
• Defining Multicast Forwarding
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.
IGMP Snooping Page
The
IGMP Snooping Page
contains the following fields:
•
Enable IGMP Snooping Status
— Indicates that the device monitors network traffic to
determine which hosts want to receive multicast traffic.IGMP Snooping can be enabled only
if Bridge Multicast Filtering is enabled. The possible field values are:
–
Checked
— Enables IGMP Snooping on the device.