Converting a Non-Protection Service to an SNCP Service

The SNCP service has the dual and fed selective receiving function and is applicable to the protection for the cross-subnet service. When configuring WDM services on a per-NE basis, you can use this method to convert non-protection services that are already configured to SNCP services.

Prerequisites

The non-protection service must be created.
When you convert a non-protection service to an SNCP service, the protection path must be idle.
The non-protection service is in the unlocked status.

Procedure

In the NE Explorer, select an NE and choose Configuration > Electrical Cross-Connection Service Management from the Function Tree.
Select the Electrical Cross-Connection Configuration tab, click Query to query the services on the NE.
Right-click the non-protection service to be converted and choose Convert to SNCP Service from the shortcut menu.
NOTE:
A non-protection service in ANY level cannot be converted to an SNCP service.
In the Convert to SNCP Service dialog box displayed, configure the protection service. Enter the attributes for the protection service and click OK to convert the non-protection service to an SNCP protection service, and thus the protection service route is created.

NOTE:
You need to perform the operation on the source and sink NEs of the service or the NE that is set as a dual fed or selective receiving node that crosses protection subnets.
Click New. In the Create Cross-Connection Service dialog box displayed, configure a unidirectional service from the service source board to the line board of another direction.
NOTE:
You need to perform the operation on the source and sink NEs of the service or the NE that is set as a dual fed or selective receiving node that crosses protection subnets.
On the intermediate NE that protection services pass through, configure bidirectional pass-through services between line boards.
NOTE:
You need to perform this operation on all the intermediate NEs that protection services pass through.

Configuration Example

As shown in Figure 1, project D is a ring network that consists of four optical NEs named A, B, C and D. All optical NEs are OADM stations.

Figure 1 Project D networking design

Figure 2 SNCP service after conversion

As shown in Figure 2, in project D, an ODU1 service is transmitted on station A and dropped on station B. In addition, the SNCP protection is provided on station B. Services are added and dropped through the TOM and NS2 boards on each station.

Before the conversion, the flow of the ODU1 service is as follows: ODU1←→tributary board on station A←→east line board on station A←→west line board on station B←→tributary board on station B←→ODU1.

Through the conversion, the protection service is generated and the flow is as follows: ODU1←→tributary board on station A←→west line board on station A←→east line board on station D←→west line board on station D←→east line board on station C←→west line board on station C←→east line board on station B←→tributary board on station B←→ODU1.

After the conversion on station B, you need to perform the configuration as follows:

On station A, configure unidirectional services from the tributary board to the west line board.
On station C and station D, configure pass-through services between the east and west line boards.