752 Configuring L2 Multicast Features
Multicast Source and Listener connected to Multicast Router via intermediate
snooping switches and are part of different routing VLANs: Server B ïƒ Client E
Clients E, B, and C are on the same subnet VLAN10
–
192.168.10.70/24.
Server B is in a different subnet VLAN20
–
192.168.20.70/24.
1
Client E sends a report for 239.20.30.42.
2
A multicast forwarding entry is created on D2 VLAN10, 239.20.30.42 –
1/0/2, PortChannel 1.
3
The report from Client E is forwarded to D3 via D2 – PortChannel 1.
4
A multicast forwarding entry is created on D3 VLAN10, 239.20.30.42 –
PortChannel 1, 1/0/20.
5
The report from Client E is forwarded to D4 via D3 – 1/0/20.
6
Multicast Router D4 learns group 239.20.30.42.
7
The multicast stream from Server B reaches D4 via trunk links because it is
a multicast router.
8
An IP multicast routing entry is created on D4 VLAN 20 – VLAN 10 with
the L3 outgoing port list as VLAN 10 – 1/0/20.
9
Client E receives multicast data from Server B.
10
Clients B and C do not receive Server B data because no report messages
were sent requesting Server B traffic.
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