Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

Forum Discussion

Sergio000_19532's avatar
Sergio000_19532
Icon for Nimbostratus rankNimbostratus
Apr 24, 2019

Recomendations to upgrade from 10.2.1 to 12.1.2

Hi guys, I have to perform an upgrade from 10.2.1 to 12.1.2 I already checked these links and also iHealth:   https://support.f5.com/csp/article/K16220   https://support.f5.com/csp/article/K673...
application delivery
big-ip
youssef1's avatar
youssef1
Icon for Cumulonimbus rankCumulonimbus
Apr 25, 2019

Hi,

did you check this article:

https://devcentral.f5.com/articles/big-ip-upgrades-part-1-preparation-27269

Here a great procedure for upgrading from 10.x to 11.x:

https://www.thegeekstuff.com/2012/04/upgrade-big-ip-f5-ltm/

Additional point, if you want to specify which version must be running after reboot enter the following command:

switchboot -l
will show you (Current boot image / Default boot image / Available boot image)

and 

switchboot
alone will allow you to select default boot.

keep me in touch if you need more details.

regards