You can refer Airwave supported guide to check compatibility. Support for 8.5.0.0 is added from 8.2.9 code. Current latest code is 8.2.11.2, which have support for 8.6.0.x & 8.7.0.x code as well.
From 8.2.10, centos version is 7.x code. Your current server can be upgraded till 8.2.10.1 code, to upgrade to 8.2.11.0 and above, we need to migrate centos version to 7.x.
Steps to migrate to Centos 7.
- Upgrade from 8.2.1.1 to 8.2.10.1 which have multiple upgrade paths.8.2.1.1> 8.2.3.1>8.2.4.1>8.2.6.1>8.2.7.1>>8.2.9.1>8.2.10.1 (Note: root access blocked from 8.2.4 code, we will have AMPCLI shell which will have limited access.)
- Take backup of 8.2.10.1 after upgrade.
- Do fresh install of 8.2.10.1 using ISO.
- Restore backup on newly installed server which took in step2.
- Now we will be able to upgrade server to 8.2.11.0 and above.