ip multicast helper-map - position of ip directed-broadcast

From: hin ccie (hinccie@yahoo.com)
Date: Fri Aug 12 2005 - 05:10:18 GMT-3


Guys,
 
I'm rather confused about the position of ip directed-broadcast
on the ip multicast helper-map configuration.
 
I know that ip multicast helper-map config is put on the incoming router interface
of mcast traffic from source to receiver.
 
Let's say
 
source -- eth0/0 - R1 - s0/0 ---(mcast area) ---s1/1- R2- eth 1/1 --- receiver
 
so it is broadcast -> mcast -> broadcast flow

Where should I put the ip directed-broadcast command ?
1. on eth0/0- R1 (within broadcast area)
2. on s1/1 - R2 (within mcast domain - but it is the incoming interface of mcast traffic) ??
                OR
    on eth 1/1 - R2 (within broadcast area) ??
 
Please advise any help
 
TIA
hino

                
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