Recovery mechanism for 10 ge optical transport network wavelength division multiplexing ring

A device, the device being suitable for use in a network ring, the device comprising:

• a plurality of ports, the plurality of ports including a first port and a second port, the first port being changeably configured to be in a forwarding state;
• means for identifying if the first port is interfaced with a failure associated with the network ring;
• means for generating at least a first G.709 frame, the means for generating at least the first G.709 frame being arranged to insert at least one bit into at least the first G.709 frame that indicates that the failure associated with the network ring has been identified if the first port is interfaced with the failure associated with the network ring;
• and
• means for forwarding at least the first G.709 frame through the second port.

A device, the device being suitable for use in a network ring, the device comprising:

• a plurality of ports, the plurality of ports including a first port and a second port, the first port being initially configured to be in a blocking state such that data transmitted by the device is transmitted using the second port and not the first port;
• a detecting arrangement, the detecting arrangement being arranged to detect if a first G.709 frame is received on the first port;
• and
• a processing arrangement, the processing arrangement being arranged to determine if the first G.709 frame indicates that there is a failure within the network ring, wherein if the processing arrangement determines that the first G.709 frame indicates that there is the failure within the network ring, the processing arrangement configures the first port to be in a forwarding state such that the data transmitted by the device is transmitted using the first port and the second port.

A device, the device being suitable for use in a network ring, the device comprising:

• a plurality of ports, the plurality of ports including a first port and a second port, the first port being initially configured to be in a blocking state such that data transmitted by the device is transmitted using the second port and not the first port;
• means for receiving a first G.709 frame received on the first port;
• means for determining if the first G.709 frame indicates that there is a failure within the network ring;
• and
• means for configuring the first port to be in a forwarding state if the first G.709 frame indicates that there is the failure within the network ring, the forwarding state being arranged such that the data transmitted by the device is transmitted using the first port and the second port.

A method for propagating fault information through a wave division multiplexing ring, the method comprising:

• detecting a fault associated with a port of a first node;
• generating at least a first G.709 frame, the at least first G.709 frame including at least one bit that indicates that the fault is detected;
• providing the at least first G.709 frame to a second port of the first node;
• forwarding the at least first G.709 frame from the second port to a second node;
• and
• setting an interface state of the first port to a blocking state.