Multicast helper map

Hi

I am working with a multicast problem.Requirement is there is a host in LAN
that can send unicast and broadcast and this needs to carry over a multicast
network on the other side.

Network diagram: fa0/0(LAN)----R2--------wan link-----(se0/0)
R1---Fa0/0(LAN)

Simple enough we can use multicast helper map command:

On R2
int fa0/0
ip pim sparse-mode
ip multicast helper-map broadcast 239.1.1.1 ACL-name <we can make acl
that identify traffic lets say on port 4000)

on R1
int se0/0
ip pim sparse-mode
ip multicast helper-map 239.1.1.1 192.168.1.255 ACL-name

yes I know we need to use that ip forward protocol and directed broadcast
command on these routers too and what we are acheiving here is converting a
broadcast to a multicast and then on other side from multicast to a subnet
level broadcast.sounds good and working too.

Now here requirement is host on R2 Lan also wants to receive the traffic.i
mean hosts in R2 Lan must use udp port say 4000 to map them to support to
receive and send multicast traffic.

I am a bit confused here.how this thing will work.Please help me to get rid
of this.

Regards
Sunil

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Received on Thu Jun 23 2011 - 20:11:58 ART