Okay, so I seem to have messed up on a switch. I was configuring a switch to specified parameters printed out for me by somebody else, I was able to duplicate the config exactly and all was great, except the configuration I was copying had the following line:
"aaa authentication login default line enable"
I added that to the new switch, and reloaded.
Now, I'm being prompted for a username, and like a dufus I never set up a username/password in the first place. (In fact, I'm not sure why I'm being prompted for username, since line and enable shouldn't require username authentication.) So, I don't know what to type in for username - the moment I enter anything (like admin, or default, etc) for a username, I get an "authentication failed" message before even being prompted for a password.
Can anyone help?