Patent ID: 7565442
Filing Date: 2009-07-21
Classification: H04J

Abstract:
1. A method for communicating state information between a local device and a remote device across a transport network, each of said devices operating independently from one another, the method comprising: enabling Fibre channel distance extension; receiving a protection message comprising K-bytes from one of the local and remote devices at the other of the local and remote devices, the local and remote devices configured for Y-cable, one-way traffic protection between the local and remote devices; identifying a state at the device receiving said protection message based on a Fibre channel distance extension state machine; determining based on the received K-bytes and the identified state, if there is a change in state at one of the devices; and if a change in state is detected, sending a message indicating the change in state from one of the local and remote devices to the other of the local and remote devices.