I used Netconfig to change passwords on approximately 1000 switches. I applied this command on several different switch models and IOS versions:
username xxx privilege 15 password 7 *******
After the job got executed, the passwords got corrupted on the 4506s specifically, and I could not log on to them with either the old or the new password. They had a corrupted hash, different from the old and the new one, although the job execution was successful! Most of the rest of the devices worked fine.
I used ciscoworks LMS2.5.1, RME 4.0.4
Can anyone help me to shed some light on this? I am reluctant now on using ciscoworks to change passwords again. what do you propose I should do next time?