Converting an SNCP Service to a Non-Protection 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 SNCP services that are already configured to non-protection services.

Prerequisites

The SNCP service must be created.

The SNCP service is in the unlocked status.

Context

NOTE:

Converting an SNCP service to a non-protection cross-connection service may interrupt the service.

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 services of the NE.
Right-click on the desired SNCP service and choose Convert to Non-Protection ServiceConvert to Non-Protection Service from the shortcut menu. In the prompt dialog box displayed, click OK. The protection service is deleted automatically.
Right-click a unidirectional service from the service source board to the line board of another direction, and choose Delete from the shortcut menu. In the Confirm dialog box , click OK.
On the intermediate NE that protection services pass through, delete 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 before 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. The protection service flow for the ODU1 service 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.

Through the SNCP Working Service Change to Normal Service, the protection service whose 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 is deleted.

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

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