This is the case. We have a IBM blade chassis with 2 * c3120X switches stacked as normal in blade environment.
Goal is link aggregation from AIX server to blade switches.
We have tried:
802.3ad on AIX side - channel-protocol lacp on switch side and mode active. Result: Port-channel link status "down".
Tried to force etherchannel: AIX server "standard" - Cisco with mode on.
Result: port-channel is up. We got connection. Problem: when shutting a port down that is a member of the channel-group we got ping response from uneven ip address numbers. The other way around, shutting down the other port instead we got ping just from even ip address numbers.
Any suggestions? Please let me know and I will fill in more details if needed.