Problems encountered when upgrading from 10.2.4 to 11.5.4

Hi,

did you re-activate license before upgrading? I think in your case from 10.2.4 to 11.5.4 It was a mandatory to re-activate your license...

But in all case you can Check if you need to re-activate the license before upgrading:

https://support.f5.com/csp/article/K7727

Please next time follow this steps:

https://devcentral.f5.com/codeshare/7-steps-checklist-before-upgrading-your-big-ip-1053

Regards,