Cisco 4500 (sup v-10ge) password recovery

[FedeSaraullo]

Hello everyone! We need to do a password recovery from a Cisco 4500, but we have tried a lot of things to do it, but without success. The command confreg 0x2142 is not valid (usage: confreg). We used this guideline:

https://www.cisco.com/c/en/us/support/docs/switches/catalyst-4000-series-switches/21229-pswdrec-cat4000-supiii-21229.html

We have also tried with the confreg command only in a thousand ways, but it was always reloaded asking for the username.

any ideas?

[Reza Sharifi]

Hi,

It may be that your Rommon version is not up to date.

during the recovery at Rommon before you enter any command try using "unset" command first and then the rest of the commands.

HTH 

[FedeSaraullo]

Hello Reza! How are you? Thanks for your quickly answer. Our rommon version is 12.2(31r)SG3. So, should we run the "unset" command before the confreg?

[Reza Sharifi]

Hi, I am well. Thanks!

I think 12.2(31r)SG3 is an older version.

So, correct. try "unset" before confreg and test.

HTH

[FedeSaraullo]

Hello Reza! We are going to test that tomorrow or on next saturday. If this won´t work, we can try an upgrade of ROMMON. Do you have a procedure to do it?
Thanks!

[Reza Sharifi]

Hi,

Follow this document to upgrade it. Ignore the vss portion.

https://supportforums.cisco.com/t5/network-infrastructure-documents/how-to-upgrade-cisco-4500-sup7-e-sup7l-e-rommon-to-support-vss/ta-p/3145220

HTH

[FedeSaraullo]

Hello! We have solved the issue when we saw that the Switch wanted to boot the image from the standby supervisor, not from active. So we turned off the standby and then it booted without problems.