Recovery from control plane failures in GMPLS-controlled optical networks

摘要

The health status of the control plane and the data plane of a GMPLS-controlled optical network is independent in the physically separated control network implementation. In most control plane designs, besides the topology information, the entities of the routing protocol only record the number of available wavelengths on each link. However, the status of each wavelength is maintained by the entities of the signalling protocol. Without recovery ability of the signalling protocol CR-LDP, a failure in the control plane will result in the permanent loss of the status information of wavelengths.