LTM SW downgrade from 11.1.0 to 9.3.1?

I havent reverted back to 9.3.1 from 11, but I have reverted from 10.2.x to 9.4.7 a bunch of times.

 

 

The easiest way to do this is to create a bootable USB drive and boot the bigip from it to do a clean install of 9.3.1. All data will be deleted on HD so be careful. I am not aware of any way to "revert" the configuration from version 11 to 9. Which means you might have to build your config from scratch or hacking the conf files.

 

 

Here are some links that might be helpful.

 

 

https://support.f5.com/kb/en-us/solutions/public/9000/600/sol9661.html

 

https://support.f5.com/kb/en-us/products/big-ip_ltm/releasenotes/umdinstall_9_4_3.html