Administrative Domains : ADOM versions
 
ADOM versions
ADOMs can concurrently manage FortiGate units running both FortiOS version 4.0 MR3 and 5.0, allowing devices running these versions to share a common database. This allows you to continue to manage an ADOM as normal while upgrading the devices within that ADOM.
 
It is recommended that this feature be used only to facilitate upgrading to new firmware and that ADOMs are not regularly run in this mode.
Each ADOM is associated with a specific FortiOS version, based on the firmware version of the devices that are in that ADOM. This version is selected when creating a new ADOM (see “Adding an ADOM”), and can be updated after the all of the devices within the ADOM have been updated to the latest FortiOS firmware version.
The general steps for upgrading an ADOM that contains multiple devices running FortiOS v4.0 MR3 from v4.0 MR3 to v5.0 are as follows:
1. Make sure that the FortiManager unit is upgraded to a version that supports this feature (v5.0 Patch Release 6).
2. In the ADOM, upgrade one of the FortiGate units to FortiOS 5.0, and then resynchronize the device.
All the ADOM objects, including Policy Packages, remain as v4.0 MR3.
3. Upgrade the rest of the FortiGate units in the ADOM to version 5.0 firmware.
4. Upgrade the ADOM to v5.0. See “Upgrading an ADOM” for more information.
All of the database objects will be converted the v5.0 format, and the Web-based Manager content for the ADOM will change to reflect the v5.0 features and behavior.
 
An ADOM can only be upgraded after all the devices within the ADOM have been upgraded.