Method used to add 1+1 linear MSP for ASON services

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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.

Other related questions:
Switching mechanism of the SNCP ring with 1+1 linear MSP
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.

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.

Method used to specify the working and protection trails of an intra-board 1+1 protection group on DCP boards
Select ports 1(RI11/TO11) and 2(RI12/TO12) of the DCP boards as the working and protection trails respectively. Alternatively, select ports 3(RI21/TO21) and 4(RI22/TO22) of the DCP boards as the working and protection trails respectively.

Method used to specify the working and protection trails of an intra-board 1+1 protection group on OLP boards
Select ports 1(RI1/TO1) and 2(RI2/TO2) of the OLP boards as the working and protection trails respectively.

ASON service SLA
ASON service SLAs are classified into diamond, silver, and copper. The service protection policies vary according to service SLAs. Diamond services have the highest priority in the system. That is, the system ensures the normal transmission of diamond services with preference. Silver services have a priority higher than copper services but lower than diamond services.

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