| 主权项 |
1. A method for service instance management in a first network node of a communication network, the method comprising
monitoring a plurality of bidirectional and distinct network paths for carrying a number of service instances from the first network node to a second network node, wherein a number of said network paths form a protection group associated with a respective service instance or group of service instances, said monitoring including: continuously and periodically sending Continuity Check Messages, CCMs, on a monitored network path to the second network node; in response to occurrence of a predetermined event, including an indication bit in the CCMs, which are sent on said monitored network path for a predetermined first period of time after the occurrence of said predetermined event, wherein the indication bit indicates presence of a mismatch information element in the CCM that includes the indication bit, wherein the mismatch information element includes information that specifies, for each protection group that said monitored network path is a member of, traffic status of a working network path and of a protection network path of the protection group. |
