Avaya Configuring IP Multicasting and Multimedia Services Manual de usuario Pagina 156

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Configuring IP Multicasting and Multimedia Services
9-6
303527-A Rev. 00
In Figure 9-4, the following events occur:
1. A host on LAN B sends an unsolicited join message to IGMP-R. IGMP-R
forwards the join message to the MOSPF boundary router.
2. The MOSPF boundary router receives a datagram addressed to the group that
the host has joined.
3. The MOSPF boundary router forwards the datagram downstream to IGMP-R.
4. IGMP-R determines that a member of the group resides on LAN B and
forwards the datagram on the downstream interface to LAN B.
Figure 9-4. IGMP-R and Downstream Multicast Data
IP0074A
IGMP Relay
MOSPF AS
boundary router
1.
3.
2.
4.
LAN A
LAN B
LAN C
Host 1
Group
member
Key
Unsolicited join message
Multicast data
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