Multicasting over VTI

[supunit21]

I am experiencing an issue with multicast feeds over a VTI. We have two VPN gateways at both source and receiver sites. From the receiver side, a static default route has been put in place towards the tunnel. On the source side, we have configured IGMP static join on the tunnel interface to transmit multicast feeds over the tunnel to the receiver side. When I run, show ip mroute command on the VPN gateway at the receiver side, I can see the multicast feed is receiving. But I have a doubt to clear. When I do a RPF lookup for the multicast source IP, I get below output.

Receiver#show ip rpf 125.12.23.2

RPF information for ? (125.12.23.2)

RPF Interface: Tunnel2617

RPF Neighbor: ? (0.0.0.0)

RPF route/mask: 0.0.0.0/0

RPF type: unicast (static)

I need to know why the RPF neighbor and RPF route/mask are all 0's. Can someone explain this why?

[Georg Pauwen]

Hello,

do you have static mroutes pointing towards the respective other side of the tunnel ?

Post the running configs of both sides...

[supunit21]

Hi,

On the receiver side, we don't have static mroutes pointing towards the
other side of the tunnel. W e have only a static default route put in place
for the unicast traffic like below.

Receiver# ip route 0.0.0.0 0.0.0.0 10.10.10.1

[Georg Pauwen]

Hello,

post the full running configs so we can lab this...

[paul driver]

Hello

sh ip route 125.12.23.2
sh ip mroute 
sh ip pim neighbor

You don't mention what pim your are using but incase you don't have any RP try sparse-dense-mode on all interfaces other than the transit interfaces and as stated add a static mroute towards the interface sourcing the MC source.

ip mroute 125.12.23.2 255.255.255.255 tun2617

[supunit21]

Hi,

We don't run PIM between two sites. We use static joins instead.

[paul driver]

Hello

Not sure i understand so how do you route the multicast as the the receivers and mc source are on different routable subnets ?