debug - Show all mutlicast packets

[mickd08]

Hello,

I am investigating a multicast issue on a C881 router running 15.3.3M10 

I am looking that the vlan switch port interface.

When things are working correctly, the command "debug ip mfib pak" shows multicast packets arriving at the interface.

Occasionally it seems that the multicast cast traffic is being "filtered" or "dropped" from the interface. Using wireshark I have confirmed that packets are being sent to the interface.

Are there other debug commands that may show if packets are being dropped?

I have tried a "debug ip packet detail" (for a few seconds) but I still do not see the multicast appearing.

There are no ACL's in place.

[Georg Pauwen]

Hello,

debug ip mpacket

debug ip igmp

should display all multicast traffic...

[mickd08]

Thanks for the reply.

I have tried the commands you suggested but I am still unable to see the multicast traffic in question.

It appears the packets are being discarded/dropped before they are reported to the debug ??