Configuring the Switch
IP Multicast (IGMP) Service
Switch # 1 IGMP is NOT
Running Here
IGMP IS Running Here
Switch # 3
Multicast
Data Stream
Switch #2
PC #2 | Switch #4 |
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PC #1
PC # 5 |
| PC #6 |
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■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