[Xorp-users] PIM-SM not forwarding multicast traffic

[Ben Greear]

On 08/17/2011 04:34 PM, swdickey at rockwellcollins.com wrote:
>
> Hello all,
>
> I am currently having an issue getting PIM-SM working with Xorp v1.8.3 on Fedora 14.
>
> *Setup:* Three in a line
>
> Fedora14_A <eth0 10.10.30.1 ------------ eth1 10.10.30.2 > Fedora14_B running XORP <eth0 10.10.40.2 ------------ eth1 10.10.40.3> Fedora14_C
>
> I am trying to send multicast traffic from A to C via multicast forwarding through B. I have a test program (which I can post if needed) that will send UDP
> datagram messages from A to 224.1.1.1. B will receive these messages, but will not forward them to C. Alternately, if I try sending the multicast messages from
> B, C will then receive them- indicating that C is properly subscribed to the IGMP group and is correctly configured. Also, Unicast traffic (pings) is being
> forwarded by B (XORP enabling ip_forward) as there are static routes setup on B.

Can you sniff to make doubly sure that you have TTl > 3 or so?

If unsure, post a small pcap capture file on the sending machine.

Thanks,
Ben

-- 
Ben Greear <greearb at candelatech.com>
Candela Technologies Inc  http://www.candelatech.com