From: Stuart Reabow (stuartbr@hotmail.com)
Date: Sun Dec 07 2003 - 16:31:08 GMT-3
Hi all,
I've been doing a lot on multicast, but I'm still not sure about a couple
things. Please could someone confirm the below.
1) In the following scenario :
sender ---- L2 3550 ------ router ------- L2 3550 -------receiver
No multicast config is required on 3550's
ip cgmp is required on the router interfaces
pim xxx-mode on router interfaces
ip multicast-routing enabled on router
2) In the following scenario :
sender ---- L2 3550 ------ router ------- L3 3550 -------receiver
In this scenario, the second switch is L3, but router/receiver are on the
same vlan.
Configs are as in first scenario.
3) In the following scenario :
sender ---- L2 3550 ------ router ------- L3 3550 -------receiver
In this scenario, the second switch is L3, with router/receiver are on
different vlan.
Multicast routing is required on the 3550's.
pim xxx-mode on vlan interfaces
No other multicast config is required on 3550's
ip cgmp is required on the router interfaces
pim xxx-mode on router interfaces
ip multicast-routing enabled on router
In all three cases IGMP/CGMP configs are not required on the 3550's & ip
cgmp is required on the router?
Thanks in advance
Stuart
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