Username option -l using ssh and putty

Dragon0x40
Dragon0x40 used Ask the Experts™
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I was trying to ssh to a switch from an open putty session on my current switch but I just typed "ssh x.x.x.x" and all I got was a password prompt. When I entered my password it was not accepted. I tried several times.

My TACACS account was locked out.

I should have been typing "ssh -l my_username x.x.x.x" pressing enter and then entering my TACACS password.

My question is how did TACACS know to lock out my account if I was not putting my username in the ssh command?

And if TACACS did know my username then why would it not accept my password?
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Senior infrastructure engineer
Top Expert 2012
Commented:
When not using -l the username with which you are logged on to the current device is used. So if that's a different username you'll get an error.

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Commented:
I only have one username and one password that I use for TACACS. I am not sure how the switch would get a different username. Is there a default username when you don't specify one? If so why was my TACACS username locked out?

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