Symptom
udld port aggressive is enabled on C9300 stack.
After restarting C9300 Active or Standby, Etherchannel optical port of C9300 and peer device will be udld err-disable.
Also, the event Doesn't happen when restarting the whole C9300 stack.
Conditions
-C9300 Stack
-udld port aggressive is enable
-Etherchannel optical port
-restarting Active or Standby
Workaround
port shut /no shut after issue
