I had a switch go down recently. In replacing said switch i dropped the config onto the replacement, copied running config to start and reloaded.
However, when it had booted back up, i was unable to connect back onto the switch via the console cable.
Its simply states that Con0 is now available, press return to get started. However when i hit return it flashes Authentication failed and then loops back to Con0 is now available, press return to get started.
Can anybody offer me advice on
a)what could be a possible cause of this and
b) how i could resolve the problem.
Thanks in advance