Obviously we have a strange problem !
We interconnected two Cat6K Switches with Etherchannels. One Cat6K is used for the Access Devices which are connected to VLAN 40.
A device sends out a multicast (239.0.0.1) which is received on the CAT6K Port but obviously is NOT forwarded on the Ether-Channel Uplink to the other Cat6K (as long as the Ether-Channel is active with 2 physical links).
As soon as one link is disabled all the multicast-packets are forwarded (on the UPLINK) but when the second physical link is enabled again, packets are dropped.
But I am not sure, why those packets are dropped.
I would appreciate any help.
thx
hans
Scenario:
CAT6K (fully-IOS) ==========CAT6K(CatOS)----------AccessDevice