Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

PIX downgrade basic question

Hi friends,

I am planning to upgrade from PIX 6.3(1) to 7.0.

But if I wish to downgrade later for some reason, I need the old PIX 6.3(1) image again. Right? But's site has only 6.3(5). Can I use the downgrade command to downgrade to 6.3(5) when the actual previously installed version is 6.3(1)?

Or do i need to upgrade first to 6.3(5), then to 7.0, then be able to use the downgrade command to downgrade to 6.3(5)?

Please advise.

thanks a lot


New Member

Re: PIX downgrade basic question

You can tftp the 7.0 image and set the boot vaiable to the 7.0 image and restart the firewall.If you require to downgrade you can restore the earlier image by changing the boot var.

New Member

Re: PIX downgrade basic question

Thanks a lot. I thought that upgrading to PIX will delete the previous image. Hence I need to have the previous image to be able to downgrade.


New Member

Re: PIX downgrade basic question

New Member

Re: PIX downgrade basic question

Do not load an older version of the PIX OS once you've upgraded to 7.x

From the 7.0 release notes:

Downgrade to Previous Version

To downgrade to a previous version of the operating system software (software image), use the downgrade command in privileged EXEC mode.

For more information and a complete description of the command syntax, see the Cisco Security Appliance Command Reference.


Caution Do not load a previous version of software if your PIX security appliance is currently running PIX Version 7.0 or later. Loading a software image from monitor mode, on a PIX security appliance that has a PIX Version 7.0 file system, results in unpredictable behavior and is not supported. We strongly recommend that you use the downgrade command from a running PIX Version 7.0 image that facilitates the downgrade process.