Nortel Networks 450 manual IP Multicast Propagation With Igmp Routing

BayStack 450 10/100/1000 Series Switches

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-IP Multicast

filtering switch

Multicast stream

Non-IP Multicast

filtering switch

Host

membership

report

BS45021B

Figure 1-31. IP Multicast Propagation With IGMP Routing

The BayStack 450 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 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.

302401-D Rev 00 1-49