Nortel Networks 24T manual IP Multicast Propagation With Igmp Routing

Introduction to the BayStack 410-24T Switch

As shown in Figure 1-31, 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

Host

Membership

Report

Non-multicast filtering switch

Multicast stream

Non-multicast filtering switch

Host

Membership

Report

BS41026A

Figure 1-31. IP Multicast Propagation With IGMP Routing

The BayStack 410-24T switch can automatically set up IP Multicast filters so the IP Multicast traffic is only directed to the participating end nodes (see

Figure 1-32).

In Figure 1-32, switches S1 to S4 represent a LAN connected to a 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.

309985-B Rev 00 1-53