Relationship between the switching detection time of ODUK SNCP protection and a fast SD protection switching condition

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The switching detection time (unit: 10 ms) described in the product documentation is used in cascading scenarios.
The SD enable status for protection determines whether protection switching is triggered when an SD condition is detected.
Fast SD protection switching is based on bit errors and implemented by setting the DEG detection time window (ms) of the SM overhead.

Other related questions:
ODUk SNCP protection switching conditions
ODUk SNCP is classified into SNC/I, SNC/N, and SNC/S. The difference between the three protection schemes lies in that they have different monitoring capabilities and therefore have different trigger conditions.

Switching time of ODUk SNCP protection
The switching time of ODUk SNCP protection cannot exceed 50 ms, excluding the detection time.

Switching conditions of ODU0 SNCP protection
For SNC/N (PM), alarms in the SM and PM sections at the server layer and SF alarms in the PM section at the current layer are used as trigger conditions.

Trigger conditions of ODUk SNCP switching
The conditions for triggering automatic ODUk SNCP switching are as follows: The board cannot be detected (for example, the board is removed or undergoes a cold reset). There are board alarms indicating SF and SD.

Principles of ODUk SNCP protection
Generally, ODUk SNCP protection needs to be configured using one tributary board and two line boards to implement dual feeding and selective receiving of ODUk services in the OTN network.

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