Description: The current operational state of the interface. The testing (3) state indicates that no operational packets can be passed - this state is not supported currently.

If ifMainAdminStatus is down (2) then ifMainOperStatus would be down (2). If ifMainAdminStatus is changed to up (1) then ifMainOperStatus should change to up (1) if the interface is ready to transmit and receive work traffic; it should change to dormant (5) the interface is waiting for external actions (such as a serial line waiting for an incoming connection); it should change to lowerLayerDown(7) state if it cannot be made up as the interface sub-layer below it is down; it should remain in the down (2) state if and only if there is a fault that prevents it from going to the up (1) state; it should remain in the notPresent (6) state if the interface has missing (typically, hardware) components.

The status unknown(4) is shown when it is not possible to determine the exact status of the interface - e.g. the interface sub-layer is performing negotiations - during this period the interface is not up but at the same time, it is not a fault condition and hence it cannot be shown as down - in such periods the status is shown as unknown.

This object has the semantics of the ifOperStatus of the standard ifTable.