Friday, June 4, 2021

Trouble configuring PIM-SM Auto-RP on GNS3

Hello everyone, I am studying multicast, and trying to make auto-RP work on GNS3. I have tried different IOSv images.

I have configured the RP candidates with :

ip pim send-rp-announce lo0 scope 10 interval 5 

and the mapping agent with :

ip pim send-rp-disco lo0 scope 10 interval 5 

My problem is that both the RP announcements (224.0.1.39) and the RP mapping (224.0.1.40) get only to the directly connected routers and are not forwarded. I checked with wireshark the TTL is 10 for both packets. So why aren't the routers forwarding 224.0.1.39 and 224.0.1.40 packets, while other multicast traffic is forwarded ? Is it a GNS3 bug ?



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