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Figure 1 SNCP Ring Networking Diagram
Huawei Metro1000 Configuration of SNCP Ring Service Signal Flow and Time Slot Allocation
Figure 1 Signal Flow and Time Slot Allocation Diagram
Huawei Metro1000 Configuration of SNCP Ring Service Configuration Procedure
Prerequisites
- The network physical topology is built.
- The network elements, single boards, and fibers have been created successfully on the network management.
- Understand the service signal flow and time slot allocation sections.
- Configure the SDH service of the source network element in NE1.
Description:- Select network element NE1 in the Network Element Manager and choose "Configuration > SDH Service Configuration" in the Function Tree.
- Click "New SNCP Service" at the bottom of the right window and set the required parameters in the pop-up "New SNCP Service" dialog box. Click OK.
| Parameter | Value in this example | Description | |
|---|---|---|---|
| Service type | SNCP | Sets the "Service Type" to "SNCP". | |
| Level | VC12 | In this example, the service is an E1 service, and set the corresponding service level to "VC12". | |
| Recovery Mode | Recovery Mode | When the network element is in the inverted state, after the working channel returns to normal for a period of time, the network element releases the inverted state and returns to the normal state. | |
| Direction | Bidirectional | In this example, the received and sent services go through the same route, that is, they are bi-directional services. Select "Bidirectional" when setting the service direction. | |
| Delay time (100ms) | 0 | The default value is used without setting a specific delay time. | |
| Wait for recovery time(s) | 600 | Recovery inversion occurs when the duration after the working channel returns to normal reaches 600s. Effective only when "Recovery Mode" is "Recovery". | |
| Working service | Source board position | 1-OI2D-1(SDH-1) | As shown in Figure 1, in this example, OI2D is planned to be used as the source board for work service in slot 1, and different work service source boards can be selected according to the actual situation. |
| Source VC4 | VC4-1 | In this example, the service requires VC12s in the range of 5 time slots, and one VC4 time slot can accommodate 63 VC12s, so it is sufficient to set the first VC4 time slot here. | |
| Source time slot range (e.g., 1, 3-6) | 1-5 | As shown in Figure 1, the total service size planned in this example is 5 E1 services, and since the service class is "VC12", the VC12 of 5 time slots is set here. | |
| Protection Service | Source board position | 3-OI2D-1(SDH-1) | As shown in Figure 1, in this example, OI2D is planned to be used as the source board for the protection service in slot 3, and you can select different source boards for the protection service according to the actual situation. |
| Source VC4 | VC4-1 | In this example, the service requires VC12s in the range of 5 time slots, and one VC4 time slot can accommodate 63 VC12s, so it is sufficient to set the first VC4 time slot here. | |
| Source time slot range (e.g., 1, 3-6) | 1-5 | As shown in Figure 1, the total service size planned in this example is 5 E1 services, and since the service class is "VC12", set the VC12 of 5 time slots here. | |
| Host board position | 6-SP2D | As shown in Figure 1, in this example, SP2D is planned to be used as the host branch single board in slot 6, and different host single boards can be selected according to the actual situation. | |
| Host VC4 | - | - | |
| Host time slot range (e.g., 1, 3-6) | 1-5 | As shown in Figure 1, the total service size planned in this example is 5 E1 services, and since the service level is "VC12", 5 time slots range of VC12 are set here. | |
- Configure the SDH service of the host network element in NE3. Refer to operation 1 to complete the SDH service configuration of network element NE3.
| Parameter items | Value in this example | Description | |
|---|---|---|---|
| Service type | SNCP | Sets the "Service Type" to "SNCP". | |
| Level | VC12 | In this example, the service is an E1 service, and set the corresponding service level to "VC12". | |
| Recovery Mode | Recovery Mode | When the network element is in the inverted state, after the working channel returns to normal for a period of time, the network element releases the inverted state and returns to the normal state. | |
| Direction | Bidirectional | In this example, the received and sent services go through the same route, that is, they are bi-directional services. Select "Bidirectional" when setting the service direction. | |
| Delay time (100ms) | 0 | The default value is used without setting a specific delay time. | |
| Wait for recovery time(s) | 600 | Recovery inversion occurs when the duration after the working channel returns to normal reaches 600s. Effective only when "Recovery Mode" is "Recovery". | |
| Working service | Source board position | 3-OI2D-1(SDH-1) | As shown in Figure 1, in this example, OI2D is planned to be used as the source board of work service in slot 3, and different work service source boards can be selected according to the actual situation. |
| Source VC4 | VC4-1 | In this example, the service requires VC12s in the range of 5 time slots, and one VC4 time slot can accommodate 63 VC12s, so it is sufficient to set the first VC4 time slot here. | |
| Source time slot range (e.g., 1, 3-6) | 1-5 | As shown in Figure 1, the total service size planned in this example is 5 E1 services, and since the service class is "VC12", the VC12 of 5 time slots is set here. | |
| Protection Service | Source board position | 1-OI2D-1(SDH-1) | As shown in Figure 1, in this example, OI2D is planned to be used as the source board for the protection service in slot 1, and you can select different source boards for the protection service according to the actual situation. |
| Source VC4 | VC4-1 | In this example, the service requires VC12s in the range of 5 time slots, and one VC4 time slot can accommodate 63 VC12s, so it is sufficient to set the first VC4 time slot here. | |
| Source time slot range (e.g., 1, 3-6) | 1-5 | As shown in Figure 1, the total service size planned in this example is 5 E1 services, and since the service class is "VC12", set the VC12 of 5 time slots here. | |
| Host board position | 6-SP2D | As shown in Figure 1, in this example, SP2D is planned to be used as the host branch single board in slot 6, and different host single boards can be selected according to the actual situation. | |
| Host VC4 | - | - | |
| Host time slot range (e.g., 1, 3-6) | 1-5 | As shown in Figure 1, the total service size planned in this example is 5 E1 services, and since the service level is "VC12", 5 time slots range of VC12 are set here. | |
- Configure the pass-through service in NE2.
- Select NE2 in the Network Element Manager and choose "Configuration > SDH Service Configuration" in the Function Tree.
- Click "New" at the bottom of the right window, and set the required parameters in the pop-up "New SDH Service" dialog box. Click OK.
| Parameter | Value in this example | Description |
|---|---|---|
| Grade | VC12 | The service in this example is an E1 service, so set the corresponding service "level" to "VC12". |
| Direction | Bidirectional | In this example, the received and transmitted services are routed through the same route, so they are bi-directional services. Select "Bidirectional" when setting the service direction. |
| Source board position | 1-OI2D-1(SDH-1) | As shown in Figure 1, in this example, OI2D is planned to be used as the source board in slot 1, and different source boards can be selected according to the actual situation. |
| Source VC4 | VC4-1 | In this example, the service needs VC12s in the range of 5 time slots, and one VC4 time slot can accommodate 63 VC12s, so it is sufficient to set the first VC4 time slot here. |
| Source time slot range (e.g., 1, 3-6) | 1-5 | As shown in Figure 1, the total service size planned in this example is 5 E1 services, and since the service class is "VC12", set the VC12 of 5 time slots here. |
| Host board location | 3-OI2D-1(SDH-1) | As shown in Figure 1, in this example, OI2D is planned to be used as the host board in slot 3, and different host boards can be selected according to the actual situation. |
| Host VC4 | VC4-1 | The service in this example requires VC12s in the range of 5 time slots, and one VC4 time slot can accommodate 63 VC12s, so it is sufficient to set the first VC4 time slot here. |
| Host timeslot range (e.g., 1, 3-6) | 1-5 | As shown in Figure 1, the total service size planned in this example is 5 E1 services, and since the service class is "VC12", 5 time slots are required to set up VC12 here. |
- Configure the pass-through service in NE4. Refer to operation 3 to complete the SDH service configuration of NE4. The configuration method and parameter settings are consistent with those of NE2.
- Refer to Verifying SDH Service Configuration Correctness to verify the correctness of the service configuration.
- Enable the performance monitoring of the network element; refer to Setting the Performance Monitoring Parameters of the Network Element for the procedure.
- Backup the configuration data of the network element, the operation procedure can be referred to Backup the network element database to the main control board.
There are many similarities between setting up SNCP ring network and MSP, for example, both topologies need to use dual fibers to set up a ring network, and the services on the ring also go through the intermediate nodes from the source network element to the host network element. The biggest difference is that SNCP protection and services do not need to be created separately and can be set up at once on the network management.
As shown in the network diagram in Figure 1, there is an SNCP ring consisting of four devices. In this example, the source network element NE1 and the host network element NE3 on the ring choose SP2D single board as the branch board for up and down services, and OI2D single board as the line board to complete the transmission of SDH services.
Like the MSP ring, in the case of multiple service routes from the source to the host, it is necessary to plan a certain service flow direction for the services on the SNCP ring in advance. In addition, in the time slot division process of SNCP ring service, the time slots of the source board position include the working service source time slot and the protection service source time slot, which need to be configured separately.
The signal flow and time slot allocation of the service are shown in Figure 1. In the actual configuration process, the working channel and protection channel can be planned separately according to the demand. In this example, the working service route is set as NE1-NE2-NE3 and the protection service route is set as NE1-NE4-NE3, and the service size is 5 E1 services.
SNCP ring service and its protection function is created in the network management is completed, the configuration of the source and host network elements on the SNCP service focus to clarify the work of the service and the protection of the service source board position and time gap, in addition to configure the intermediate nodes on the network element through the service can be.
