I have a problem with my CE520 switches when the main UC520 unit is rebooted.
I have two CE520s attached to the UC520 and whenever I reboot the UC520 the trunk ports on the CE520s both go into a err-disabled state with an error of one-way traffic detected. I have to shutdown the trunk ports and restart to recover.
It makes remote after hours rebooting of the UC520 impossible.
Any ideas how to fix this so that the trunk ports don't shutdown?
Capital IT Pty Ltd