Hello, we have a master/standby and 2 local controllers.
The controller is unreachable for a few moments but stays in the 'down' state. unable to ping at first, then i can ping it but it stays down.
During this time I cannot connect via ssh.
this is the command show switches on the master controller
Many thanks for the idea of a ip conflict. This seems to be the problem.
We forgot to exclude the controller IP in the dhcp scope!