
Configuring IGMP Relay
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9-5
In Figure 9-3, for example, the following events occur on the IGMP Relay device:
1. The IGMP Relay device sends IGMP host membership queries out the
interfaces to LAN A, LAN B, and LAN C.
2. Host 1 on LAN A responds to the query by sending an IGMP host
membership response to the IGMP Relay device.
3. IGMP Relay forwards the IGMP host membership response to the IP
multicast router.
Figure 9-3. IGMP Relay Host Queries and Responses
Key
IP0072A
IGMP host membership query
IGMP host
IGMP host membership response
IGMP Relay
IP
multicast router
1.
3.
2.
LAN A LAN B
LAN C
Host 1
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