I have a Cisco 3650 switch and port 24 is trunked to a Nortel baystack switch. Every 2-4 weeks this trunk will go down and "show interface brief" it shows the port is down. If I do a "shutdown" on the port and then "no shutdown" the trunk comes back up.
There is no management on the Nortel so I can't remote into it. It's out of the box, plus this is a remote site in Scotland! :)
Can do anything else?