Onboard Administrator 3.00 and higher provide a user-configurable IEEE 802.1Q tagged VLAN. This feature enables you to completely isolate traffic from the server or the interconnect module by creating a VLAN on the enclosure management network.
VLAN places no requirements or restrictions on the IP address. However, the external router or switch, which the Onboard Administrator is connected to, must be configured as a VLAN trunk access mode to route and pass multiple tagged traffic through the Onboard Administrators external Ethernet interface.
You can refer HPE BladeSystem Onboard Administrator - VLAN Commands if you want to perform action through OA CLI.
https://support.hpe.com/hpesc/public/docDisplay?docLocale=en_US&docId=emr_na-a00040697en_us