Patent ID: 8582968

Claim:
A method for advertising a routing protocol message in a wavelength division multiplexing network, the method comprising: obtaining node information and link information of a node, wherein the node information contains port cross-connection capability information of the node, and the link information contains wavelength restriction information and wavelength status information of each link connected to the node; wherein obtaining the node information of the node further comprises obtaining at least one of the following: wavelength conversion capability information of the node, impairment information at node level, or port to port impairment information inside the node; carrying the obtained node information and link information in a Type-Length-Value (TLV) of a routing protocol message, and advertising the routing protocol message in the network; wherein obtaining the link information of the node further comprises obtaining link impairment information on each port of the node; and wherein the wavelength conversion capability information of the node comprises: whether a wavelength converter in the node is connected to an ingress port and an egress port of the node, a range of wavelengths is converted by the wavelength converter, and whether the wavelength converter is available or occupied.