Configuring Igmp Snooping - NETGEAR ProSafe GS700TP Software User Manual

Layer 2 switching forwards multicast packets to all relevant VLAN ports by default, treating the packet as a
multicast transmission. Multicast traffic forwarding is functional. However, irrelevant ports also receive the
multicast, causing increased network traffic. Multicast forwarding filters enable forwarding of Layer 2
packets to port subsets, defined in the multicast filter database.
The device supports forwarding L2 Multicast Packets. Multicast forwarding is enabled by default, and not
configurable by user.
This section contains the following topics:
•

Configuring IGMP Snooping

• Defining Multicast Groups
• Configuring Multicast Forward All
Configuring IGMP Snooping
When IGMP snooping is enabled, 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, and what routing protocols are forwarding packets and multicast
traffic. Ports requesting to join a specific multicast group issues an IGMP report specifying that multicast
group.
To enable IGMP Snooping:
Configuring The Device Using Your Browser
GS700TP Smart Switch Software User Manual
v1.0, January 2007
137