Description: This object indicates the state of the Hello protocol exchange over this link.

The 'down' state is the initial state of the OSCP Hello finite state machine. This state is also reached when lower-level protocols declare that the wavelength is not usable. No hello packets are sent or received in this state.

The 'attempt' state indicates that either no hellos or hellos with mismatch information have recently been received from the remote switch. In this state, attempts are made to contact the remote switch by periodically sending hellos with period coscpHelloInterval.

The 'oneWay' state indicates that Hellos have recently been received from the remote switch, but the remote switch identifier and the remote port identifier in the remote switch's hello packets were set to zero. This means that the remote switch does not know the identity of this switch.

The 'twoWay' state indicates that hellos have recently been received from the remote switch including the correct remote switch identifier and remote port identifier fields. This means that bi-directional communication with the remote switch over the message channel on this wavelength has been achieved. The link is now capable of becoming the active OSC for a wavelength bundle.

A link that is not in the 'twoWay' state is not capable of becoming the active OSC for a wavelength bundle.