airIRRP500UnitConfigUnitRoleOverride 1.3.6.1.4.1.318.1.1.13.3.3.2.2.6.13

When this OID value is (1) automatic, the system determines which units are used as primary units and which units are used as backups. When this OID value is (2) forcedOn, the connected unit is set as a primary unit.