Nortel Networks 350 manual IP Multicast Propagation with Igmp Routing

BayStack 350 10/100/1000 Series Switches

As shown in Figure 1-24, a non-IP Multicast filtering switch causes IP Multicast traffic to be sent to all segments on the local subnet.

Host

Membership

IGMP

Host

Query

Designated

router #1

Internet	Host
	Membership
	Query
	Designated
	router #2

Non-multicast filtering switch

Host

Membership

Report

304

Multicast stream

Non-multicast filtering switch

304

Host

Membership

Report

BS35021A

Figure 1-24. IP Multicast Propagation with IGMP Routing

The BayStack 350 10/100/1000 Series Switches can automatically set up IP Multicast filters so the IP Multicast traffic is only directed to the participating end nodes (see Figure 1-25).

In Figure 1-25, switches S1 to S4 represent a LAN connected to an IP Multicast router. The router periodically sends Host Membership Queries to the LAN and listens for a response from end stations. All of the clients connected to switches S1 to S4 are aware of the queries from the router.

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