Switching mechanism of the SNCP ring with 1+1 linear MSP

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Switching mechanism of the SNCP ring with 1+1 linear MSP:
The SNCP ring and 1+1 linear MSP are two independent protection modes that do not affect each other.

Other related questions:
Method used to add 1+1 linear MSP for ASON services
Question: On a network where diamond and silver ASON services are provisioned on the OSN 9500, how do I add 1+1 linear multiplex section protection (MSP)? Equipment version: OSN 9500 ASON V100R002 NMS version: T2000 V200R005 Analysis: 1. For traditional services on OSN equipment, you can directly add 1+1 linear MSP. After ASON services are provisioned on the equipment, you need to downgrade the services to static services and then add 1+1 linear MSP. 2. If you downgrade a diamond service to an SNCP service, add 1+1 linear MSP on the access side, and then search for SDH trails, the obtained trails are incomplete and you cannot directly upgrade the service to an ASON service. When this occurs, you need to supplement the service on the NMS. The NMS automatically supplements service cross-connections. In this example, the NMS needs to supplement the cross-connections from line protection timeslots to tributary protection timeslots. Answer: To add 1+1 linear MSP for a silver service, perform the following operations: 1. Downgrade the silver service to a static service. 2. Add 1+1 linear MSP. 3. Search for SDH trails and upgrade the service to a silver service. To add 1+1 linear MSP for a diamond service, perform the following operations: 1. Downgrade the diamond service to a static service. 2. Add 1+1 linear MSP. 3. Supplement the service. 4. Search for SDH trails and upgrade the service to a diamond service. In addition, you can optimize the diamond service to a silver service, and then perform the operations described above for a silver service. However, there are many steps. Suggestion and conclusion: During the operations, ensure that the SDH trail view is correct. Therefore, you are advised to search for new trails after services are optimized, downgraded, or supplemented, ensuring synchronization between the NMS and NEs.

Precautions for changing ring MSP to linear MSP on the Metro 3000
After ring MSP is changed to linear MSP on the Metro 3000, services must be reconfigured.

Msp ring switch to protection theroy
After half time slot on the fiber (channel) protection before half time slot on the fiber channel (work), the rearrangement of fault point on both ends of the bridge, through network elements among them, the business flow to traverse the whole ring

Whether MSP ring protection switching will be triggered by removing a line board
Whether MSP ring protection switching will be triggered by removing a line board: When the protocol status is normal, the MSP ring protection switching will be triggered by removing a line board.

Principles of two-fiber bidirectional MSP ring protection switching
Principles of two-fiber bidirectional MSP ring protection switching: The latter half timeslots (protection channel) in a fiber are used to protect the former half timeslots (working channel). During the switching, the two ends of the failure point are bridged, services pass through the intermediate NEs, and the service flow traverses the entire ring.

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