Multicast flow (video) through router with igmp.

[julien.forget]

Hi there !

I try to receive a multicast broadcast video stream passing through cisco routers.

And it doesnt work ...

My routers are virtual, using GNS3, i made 2 comp; one with 2 c2691, and one with 2 c7200

I used the Multicast Quick-Start Configuration Guide from Cisco, and try to do the first exemple.

Here u can see my schema.

My first computer PC1 (address 172.16.100.2/24, gateway 172.16.100.254 = R1) diffuse 1 flow (video) with VLC using 225.1.1.1 multicast address, my second computer PC2 (address 172.16.200.2/24, gateway 172.16.200.254 = R2) is supposed to receive and open the flow with VLC.

Both of my PCs (windows xp sp3) are virtuals too, using VMware Workstation.

So PC2 recovers well ads (SAP) and informations flow; see this screen, and this screen.

But i cant open it ...

I can see with wireshark that PC2 suscribes well to the group adress; see this screen. But the flow doesnt arrive, and video doesnt open ...

If someone can explain me what i miss, and what to do.

Here you can see Router1 configuration and Router2 configuration.

And here you can dl wireshark captures : from PC1 and PC2.

Thank you.

[Mohamed Sobair · Accepted solution]

Hello,

Your Config is Ok, and the Multicast reciever should have the MC stream.

Please check the TTL value of the VLC as in many VLC software it uses a default value of 1, this will prevent your MC reciever from recieving the stream.

adjust it to 2 and you should be fine.

Regards,

Mohamed

[julien.forget]

Ho My God !!!

I didnt even think about this just 1 second !

Now it works !!!

Thank you a lot Mohamed.

Regards,

Julien