A new uplink bundle is down on one side and up on the other
TroubleshootingWorking
The ticket
Last night a contractor converted ASW2's two 1G uplinks to DSW1 into an EtherChannel and added VLAN 40 for new cameras. This morning monitoring shows Port-channel1 down on ASW2. Users on ASW2 work normally through its other uplink to DSW2, and DSW1 reports its side of the bundle, Port-channel12, as up.
Step 1 of 4
ASW2 says the bundle is down, DSW1 says it is up, and users are fine. What do you look at first?