
Configuring IP Multicasting and Multimedia Services
9-4
303527-A Rev. 00
In Figure 9-2, for example, the following events occur on the IGMP-R device:
1. IGMP-R 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-R device.
3. IGMP-R forwards the IGMP host membership response to the MOSPF
boundary router.
Figure 9-2. IGMP-R Host Queries and Responses
Key
IP0072A
IGMP host membership query
IGMP host
IGMP host membership response
IGMP Relay
MOSPF
AS boundary
router
1.
3.
2.
LAN A LAN B
LAN C
Host 1
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