After the bigip upgrade, the device status is abnormal and the configuration cannot be loaded
My device version is bigip- 18.104.22.168, the upgraded version is 22.214.171.124, ASM and AVR modules are used, and now after switching from version 14 to version 15, the status of the device changes to "UNKNOWN", and the configuration cannot be loaded , the module cannot be displayed and loaded normally, and it will return to normal after returning to version 14. Doing a "load sys config verify" reload also doesn't load properly.
I try to list step before upgrade version, could you try step below before upgrade ?
Check about MA on your F5 BIG-IP device before upgrade version, It’s very important, In case you found any problem after upgrade version that relate the software, You need to open ticket to F5 support for investigate the case
Check hardware compatible with software
Check license information about service check date, Each version of F5 require update about reacitvate license for update date
Download F5 version and check md5sum for confirm every on image version is ok
If posible, Please test upgrade version in your lab before upgrade on production for confirm about behavior or config change on BIG-IP system