Does f5mku rekeying work across different BIGIP versions?

If you have an old HA cluster you can extract the master key from any of the old F5s with:

f5mku -K

Example:

[root@f5bigip:Active:Disconnected] config # f5mku -K

aVNFRwSdF2Q38L9fw7jzlC==

You can then reset the master key on the new F5 device:

f5mku -r aVNFRwSdF2Q38L9fw7jzlC==

After that you should be able to load the UCS file without getting the encrypted object errors.

I've done these between different BigIP versions (12.x-->14.x, 14.x-->15.x) and from hardware to VE and viceversa. I don't remember doing it from version 11.x, but I guess it should work ass well since that command existed in that version.

Hope that helps.