After the bigip upgrade, the device status is abnormal and the configuration cannot be loaded

Hi longyuan

I try to list step before upgrade version, could you try step below before upgrade ?

1. 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
2. Check hardware compatible with software
3. Check license information about service check date, Each version of F5 require update about reacitvate license for update date
4. Download F5 version and check md5sum for confirm every on image version is ok  
5. If posible, Please test upgrade version in your lab before upgrade on production for confirm about behavior or config change on BIG-IP system

More information: cloud-ttrust