3945 router password recovery

Unanswered Question
May 21st, 2010

Hi There,

I understand that the password has to be changed the first time we login to Cisco 3945 router but i failed to do that and its not allowing me to connect using default username/password.

Can someone help me in getting this addressed??



I have this problem too.
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Reza Sharifi Fri, 05/21/2010 - 13:08

Hi Nirmal,

You can but you don't have to change the password the first time you login to the 3900.  Are you trying to connect using the console port or telnet?



vnirmal112 Fri, 05/21/2010 - 13:12


Logged onto router via console...was about to configure a new router...I got a clear message saying that i cannot login next time if i dont change password, which i saw after logging off only :-(...



Reza Sharifi Fri, 05/21/2010 - 13:15


What version of IOS are you running?  I have 3945 and it has never asked me to change the password.


Reza Sharifi Fri, 05/21/2010 - 14:00

I am running 12.4.24.

If you have a another flash card, you can put a different IOS on it and boot it with that and see if you can get in.

The other thing you can do is to try the password recovery and see if you can get in that way

did you ever assign any passwords to it?



UN Minustah Thu, 04/12/2012 - 20:08

Hi Reza,

I am also in same situation, here i am using 15.x series(c3900-universalk9-mz.SPA.152-2.T) IOS with rommon version C3900_RM2.srec.SPA.150-1r.M13.

Actually i have upgraded the IOS and Rommon initially and After upgrading rommon i just allowed to restart the router where as before restarting one time password needed to changed as per recommanded process but unfortunatly i missed instructions.

Now after router got restarted its not allowing to login. As you suggested Nirmal that change the config register but how to do that without login?

thanks in advance.


Rajesh Sindhu

osomroy Sun, 12/02/2012 - 03:05

The first time a 3945 is powered up from the factory, it asks you to change the username/password. If that's not done the first time, it will lock you out the next time it boots. If this has happened, use password recovery (link requires cisco account) to regain access.



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