I have inherited a problem with a stack of 4x 3750 switches. There is a TACACS configuration error on the stack that means I am unauthorized to configure any changes. Each switch has one interface connecting to the management network, but these interfaces are all down due to err-disable (channel-misconfig). If these connections were restored the TACACS server would be reachable and then I could configure the necessary changes.
Currently all switches are configured with a priority of 1 and Switch 2 in the stack is currently the master.
I am unable to sh/no sh the interfaces due to the TACACS problem. Is there any other way to clear the err-disable state?