The desired state of the interface. This object can be set only when the ifMainRowStatus of the interface is active. This object has the semantics of the ifAdminStatus of the standard ifTable. When a managed system initializes, all interfaces start with ifMainAdminStatus in the down(2) state, it's a default state also. As a result of either explicit management action or per configuration information retained by the managed system, ifMainAdminStatus is then changed to the up (1) state (or remains in the down(2) state).