Hi,
After upgrading IOS from 12.4 to 15.1 version (2800 routers), we lost availability of receiving multicast packets on serial dial-up lines.
The serial config is simple:
interface Serial0/0/0
physical-layer async
ip unnumbered Loopback0
ip pim sparse-dense-mode
encapsulation ppp
async mode dedicated
On the other side there is a remote server with pppd daemon , The server is sending multicast packets via a PPP/async serial line.
Multicast packets reach the router but they are dropped:
MFIBv4(0x0): Pkt (10.50.192.11,230.32.7.7) from Serial0/0/0 (PS) Acceptance check failed - dropping
There is no problem with RFP, because sender address (10.50.192.11) is know in the whole network.
We use PIM sparse-mode with Auto-RP and the RP router is reachable in two hops.
I think, this problem is because there is no PIM neighbourhood on dial-up lines.
Is this a simple possibility to restore multicast support?
Regards,
Tom.
