Today I noticed a NIC was down on a VM, had a look and noticed it was disconnected:
So I ticked the box and clicked ok and got the follow error:
Failed to connect virtual device ethernet0.
Weird, so I thought I’d check the port ID for that virtual switch:
Looks like something else is on that port id:
Scroll down the list to find a free port ID and then go back to the VM and change the port ID and boom you should be able to connect.
