There we go again, I just keep forgettin’ things that every time are obvious. Say you have to change a configuration on a Portchannel interface. How to do it? Since the physical ports must have the same configuration of the Portchannel interface for the Ether Channel to come up there must be a sequence. And ideed there is.
- Change configuration on the physical interfaces in the group
- Change, finally, the configuration on the port channel interface
Long live and prosper.
And if you just need to change allowed vlans on the portchannel simply change che config on the portchannel interface and it’ll be automagically copied to the physical interfaces!