[Xorp-users] Problems with multicast routing on Linux

[Jon-Olov Vatn]

Pavlin Radoslavov skrev:
> If you want multicast forwarding between two segments, you MUST use
> a multicast routing protocol like PIM-SM.
> The purpose of IGMP is to inform the multicast routing protocol
> about directly connected receivers. Then it is up to the multicast
> routing protocol to modify the multicast forwarding entries in the
> kernel.
>   
Is it really necessary to use a multicast routing protocol, or could the 
forwarding tables be configured statically, e.g., with "route add ..."? 
I understand that it useful to use a routing protocol, but for a small 
network with one or two routers it may be of interest to support 
multicast routing without deploying, e.g., PIM-SM or DVMRP. When 
googling I found smcroute (http://www.cschill.de/smcroute/) which seems 
adequate for such situations, but I have not tried it and since the last 
release is from 2002 I'm a bit suspicious ... Anyone out there with 
experience of smcroute or setting up static multicast forward entries in 
Linux in general?

Mvh J-O