[KLUG Members] Routing issue

[John Pesce]

I have a subnet 192.168.3.0/24 with a linux gateway 192.168.3.1.
The gateway has a second NIC with IP 192.168.2.1 connected to the 
192.168.2.0/24 subnet in order to bridge the two subnets.

I need to connect to a new dedicated T1 with a router/CSU/DSU with an IP 
of 10.7.35.1 in such a way that UDP multicast traffic on the 192.168.3.0 
subnet also finds it way to the other end of the T1. Likewise, any 
multicast traffic coming from the other side of the T1 needs to find its 
way to the 192.168.3.0 subnet so multiple computers on the two LANs can 
talk with a partyline app on the same multicast group.

My thought is to put a third NIC card in the 192.168.3.1 box and make that 
interface 10.7.35.2. Then add some static routes to direct the flow.

BUT, what else do I need to do to get the multicast flowing? There are 
multiple subnets on the other side of the T1 particapating in the 
multicast group.


[10.7.34.0/24]
[10.7.36.0/24]==T1==10.7.35.1[ ]192.168.3.1 =[sw]= 192.168.3.0/24 
                           /=[ ]
                           |192.168.2.1
                           |
                    192.168.2.0/24