Samsung Ubigate iBG3026, Configuration Manual

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CHAPTER 10. Layer-2 Switching
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© SAMSUNG Electronics Co., Ltd.
Configuring IGMP Snooping
This section provides steps to configure Internet Group Management Protocol
(IGMP) Snooping. Without IGMP, Layer 2 routers handle IP multicast traffic
in the same manner as broadcast traffic and forward frames received on one
interface to all other interfaces. This creates excessive traffic on the network
and affects network performance. IGMP Snooping allows routers to monitor
network traffic and determine hosts that want to receive multicast traffic.
Only one membership report is relayed from a group instead of a report from
each host in the group. To achieve this, IGMP proxy is enabled on the routers.
This example describes the configuration on Router S1. The interface Ethernet
1/1 is configured as an mrouter port. Since IGMP Snooping is used in bridged
LAN environment only, router R1 does not require running IGMP Snooping
and can run any multicast protocol(such as PIM-SM). The configuration on
R1 is thus not included in this example.
To enable IGMP Snooping on an interface:
1.
Add a bridge to the spanning-tree table.
2.
Specify the interface to be configured.
3.
Associate the interface with bridge-group.
4.
Enable IGMP Snooping globally.
5.
Enable IGMP Snooping on the bridge-group.
6.
Configure ports that are connected to routers as multicast router ports.
7.
Enable IGMP Proxy on the router.