Configuring the Switch

IP Multicast (IGMP) Service Features—Multimedia Traffic Control

Switch # 1 IGMP is NOT

Running Here

IGMP IS Running Here

Switch # 3

Multicast

Data Stream

Switch #2

PC #2

Switch #4

 

 

PC #1

PC # 5

 

PC #6

 

 

 

 

 

 

Figure 6-20. Isolating IP Multicast Traffic in a Network

In the above figure, the multicast group traffic does not go to switch 1 and beyond because either the port on switch 3 that connects to switch 1 has been configured as blocked or there are no hosts off of switch 1 or switch 2 that belong to the multicast group.

For PC #1 to become a member of the same multicast group without flooding IP multicast traffic on all ports of switches 1 and 2, IGMP must be configured on both switches 1 and 2.

Switch the Configuring

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