I'm working on a pair of Nexus 3Ks that were previously configured, but have mismatched configuration on the peer-link with respect to allowed vlans. Each has a "switchport trunk allowed vlan X", but the list of vlans is different. There a few other port-channels defined that are trunks with all vlans allowed, and what I've noticed is twice in the last few months we'll see an event in the logs where the port-channel will go down with an error that the vlans are mismatched. It self recovers, but I want to correct it.
Should I anticipate any issues with simply going into the peer-link vpc and adding:
switchport trunk allowed vlan add 123
I can do this during a maintenance window if required. I don't see any routing protocols or L3 so not 100% sure why vlans are being pruned on the peer-link, but don't want to change it in the event there was a reason for it here.
