Multicast Tunnel solution

From: hadek.el-ayachi@nsn.com
Date: Tue Jul 03 2007 - 06:03:40 ART


Hi Experts,

I have this network:

mserver---------
Eth------------R4-----------DLCI103-------------R3------------DLCI302---
-----------R2--------Eth-----------RX224.2.2.2

R3 is the BSR RP for all multicast groups.
R3 is the HUB router with R4 and R2 as Spokes.
I am not allowed to use "ip pim nbma" command in R3.

So, I will use a GRE tunnel between R4 and R2 and activate pim sparse
mode in this tunnel.

My questions are:
                  1- how does this work?
                  2- Is the tunnel used after the swap from shared tree
to the source tree?
                  3- is there any other solution for this?
thanks in advance



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