Configuring Two-Fiber Unidirectional MSP Services
The two-fiber unidirectional MSP services can provide network level protection for the services on NEs on the MSP ring. On the U2000, you can add all the NEs on the MSP ring into the protection subnet to create a two-fiber unidirectional MSP ring.
OptiX OSN 550 supports two-fiber unidirectional MSP services.
- Networking Diagram
The networking diagram of a single two-fiber unidirectional MSP ring is simple. When you construct the network, follow a certain order to create and name these NEs and ensure that the traffic flows in a proper direction. This helps when you plan the traffic direction planning and service configuration in future. - Signal Flow and Timeslot Allocation
To configure the two-fiber unidirectional MSP service, you can configure the services that need to be added to the ring network on the source NE, to pass through the intermediate nodes, and to be dropped from the sink NE if the MSP protection subnet is already created. - Per-NE Configuration Process
This topic describes how to configure the two-fiber unidirectional MSP service. - End-to-End Configuration Process
This topic describes how to configure two-fiber unidirectional MSP services.
Networking Diagram
The networking diagram of a single two-fiber unidirectional MSP ring is simple. When you construct the network, follow a certain order to create and name these NEs and ensure that the traffic flows in a proper direction. This helps when you plan the traffic direction planning and service configuration in future.
As shown in Figure 2-9, the SP3D boards are used on NE1 and NE3 as tributary boards to add and drop services, and the SL1D boards are used as line boards to transmit SDH services.
NOTE: This topic considers the OptiX OSN 550 as an example to describe the board layout. In the case of other products, the configuration method is the same, except for the slots. For the slot information, see the Hardware Description of the relevant product.
Signal Flow and Timeslot Allocation
To configure the two-fiber unidirectional MSP service, you can configure the services that need to be added to the ring network on the source NE, to pass through the intermediate nodes, and to be dropped from the sink NE if the MSP protection subnet is already created.
- Traffic direction from NE1 to NE3: NE1→NE2→NE3
Services are added to the ring on the source NE (NE1), pass through NE2, and finally are dropped from the sink NE (NE3). The capacity of the services is 5xE1.
- Traffic direction from NE3 to NE1: NE3→NE4→NE1
Services are added to the ring on the source NE (NE3), pass through NE4, and finally are dropped from the sink NE (NE1). The capacity of the services is 5xE1.
- VC-12s 1-5 of VC4-1 carry the five E1 services for transmission.
- Traffic direction from NE1 to NE3: NE1→NE4→NE3→NE2→NE3
Services are added to the ring on the source NE (NE1) and switched from the original working path to the protection path. Then, the services pass through NE4 and NE3. After that, the services are switched from the protection path to the working path on NE2. Finally, the services are dropped from NE3.
- The services from NE3 to NE1 are not affected, and the traffic direction is NE3→NE4→NE1.
- The two-fiber unidirectional MSP service uses the diverse routes, whereas the two-fiber bidirectional MSP service uses the uniform route.
- In the case of the two-fiber unidirectional MSP service, different optical fibers are used for the working timeslot and protection timeslot. That is, one optical fiber is used for carrying the working service, and the other optical fiber is used for protection. In the case of the two-fiber bidirectional MSP service, the same optical fiber is used for the working timeslot and protection timeslot. That is, a certain capacity of the optical fiber is used for carrying the working service, and a certain capacity of the optical fiber is used for protection.
Per-NE Configuration Process
This topic describes how to configure the two-fiber unidirectional MSP service.
Prerequisites
- The physical topology of the network must be created.
- The NEs, boards, and fibers must be created on the U2000.
- The created protection subnet must be consistent with the actual network topology. For details about how to create the protection subnet, see Creating an MS Ring Protection Subnet.
- You must be familiar with the information about Signal Flow and Timeslot Allocation.
Procedure
- Configure unidirectional services from NE1 to NE3.
- Configure unidirectional pass-through services on NE2.
Click
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, and select NE2 from the displayed NE Navigator. Click OK.Parameter Value in This Example Description Level VC12 In this example, E1 services are configured. Hence, Level of the E1 services is set to VC12. Direction Unidirectional In this example, the services are transmitted and received on different paths. That is, the services are unidirectional services. Hence, Direction of the services is set to Unidirectional. Source Slot 1-SL1D-2(SDH-2) In this example, the SL1D board in slot 1 is configured as the source line board. See Figure 2-10. You can select different source boards depending on the actual situation. Source VC4 VC4-1 In this example, the services require five VC-12s. Source VC4 is set to VC4-1, because a VC-4 contains 63 VC-12s. Source Timeslot Range(e.g.1,3-6) 1-5 The total capacity of the services is 5xE1 according to the plan. Hence, Source Timeslot Range(e.g.1,3-6) is set to 1-5. Sink Slot 1-SL1D-1(SDH-1) In this example, the SL1D board in slot 1 is configured as the sink line board. See Figure 2-10. Sink VC4 VC4-1 In this example, the services require five VC-12s. Sink VC4 is set to VC4-1, because a VC-4 contains 63 VC-12s. Sink Timeslot Range(e.g.1,3-6) 1-5 The total capacity of the services is 5xE1 according to the plan. Hence, Sink Timeslot Range(e.g.1,3-6) is set to 1-5. Activate Immediately Yes - - Configure SDH services on the sink NE (NE3).
Click
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, and select NE2 from the displayed NE Navigator. Click OK.Parameter Value in This Example Description Level VC12 In this example, E1 services are configured. Hence, Level of the E1 services is set to VC12. Direction Unidirectional In this example, the services are transmitted and received on different paths. That is, the services are unidirectional services. Hence, Direction of the services is set to Unidirectional. Source Slot 1-SL1D-2(SDH-2) In this example, the SL1D board in slot 1 is configured as the source line board. See Figure 2-10. Source VC4 VC4-1 In this example, the services require five VC-12s. Source VC4 is set to VC4-1, because a VC-4 contains 63 VC-12s. Source Timeslot Range(e.g.1,3-6) 1-5 The total capacity of the services is 5xE1 according to the plan. Hence, Source Timeslot Range(e.g.1,3-6) is set to 1-5. Sink Slot 3-SP3D In this example, the SP3D board in slot 3 is configured as the sink tributary board for the unidirectional services from NE1 to NE3. See Figure 2-10. Sink VC4 - - Sink Timeslot Range(e.g.1,3-6) 1-5 The total capacity of the services is 5xE1 according to the planning. Hence, Sink Timeslot Range(e.g.1,3-6) is set to 1-5. Activate Immediately Yes -
- Configure unidirectional pass-through services on NE2.
- Configure unidirectional services from NE3 to NE1.
To configure unidirectional services from NE3 to NE1, refer to 1.
- Check whether the services are configured correctly. For details, see Verifying the Correctness of the SDH Service Configuration.
- Enable the performance monitoring function of the NEs. For details, see Setting Network-Wide Performance Monitoring.
- Back up the configuration data of the NEs. For details, see Backing Up the NE Data to the System Control Board.
, and select NE2 from the displayed Relevant Task
If the services are configured incorrectly and need to be deleted, see Deleting SDH Services.
End-to-End Configuration Process
This topic describes how to configure two-fiber unidirectional MSP services.
Prerequisites
- The physical network topology must be set up.
- NEs, boards, and fibers must be successfully created on the U2000.
- A linear MSP subnet must be created and must be the same as the actual topology. For details about how to create a protection subnet, see Creating an MS Ring Protection Subnet.
- The operator must understand the information provided in Signal Flow and Timeslot Allocation.
Background Information
In end-to-end mode, configuration of two-fiber unidirectional MSP services is similar to configuration of two-fiber bidirectional MSP services. The only difference is that you set Direction to Unidirectional for two-fiber unidirectional MSP services and set Direction to Bidirectional for two-fiber bidirectional MSP services.
Procedure
- Choose from the Main Menu.
- Create a VC4 server trail.
- Set associated parameters as follows. Set Direction to Unidirectional and Level to VC4 Server Trail, and take default values for other parameters.
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- Double-click the source NE (NE1) and sink NE (NE3) on the right of the Main Topology and click Apply. Then, click Close in the Operation Result dialog box that is displayed, if the operation is successful. A unidirectional VC4 server trail is set up from NE1 to NE3.
- Double-click the source NE (NE3) and sink NE (NE1) on the right of the Main Topology, and set up a unidirectional VC4 server trail from NE3 to NE1 using the same method.
- Optional: If the Operation Result dialog box indicates that the operation is successful, you can also click Browse Trail to query the created VC4 server trail.
- Set associated parameters as follows. Set Direction to Unidirectional and Level to VC4 Server Trail, and take default values for other parameters.
- Create VC12 services after setting up VC4 server trails.
- In Create SDH Trail, configure associated parameters as follows. Set Level to VC12, set Direction to Bidirectional, and take default
values for other parameters.
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- Double-click the source NE (NE1) on the right of the Main Topology. The Select Board Port-Source dialog box is displayed. Select the required SP3D board and Tributary Port, and then click OK.
- Double-click the sink NE (NE3) on the right of the Main Topology, and configure NE3 using the same method.
- Select Copy after Creation and click Apply. If the Operation Result dialog box is displayed to indicate that the operation is successful, click Close. Then, the Copy dialog box is displayed.
- In Available Timeslots/Port, select the ports from SP3D-2(SDH_TU-2) to SP3D-5(SDH_TU-5), and click Add, and then click OK.
- If the Operation Result dialog box is displayed to indicate that the operation is successful, click Close.
- Optional: If the Operation Result dialog box is displayed to indicate that the operation is successful, you can also click Browse Trail to query the created VC12 services.
- In Create SDH Trail, configure associated parameters as follows. Set Level to VC12, set Direction to Bidirectional, and take default
values for other parameters.
- Optional: Change WTR Time (s) and SD Condition.
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NOTE: Parameter settings of the sink NE must be the same as those of the source NE.
- Choose from the Main Menu to display the SDH Protection Subnet Common Attributes window.
- Click the Protection Subnet Parameters tab and change parameters such as WTR Time (s) and SD Condition.
- Click Apply. If the Operation Result dialog box is displayed to indicate that the operation is successful, click Close.
- Check whether the service configuration is correct. For details, see Verifying the Correctness of the SDH Service Configuration.
- Enable the performance monitoring function for NEs. For details, see Setting Network-Wide Performance Monitoring.
- Back up the configuration data of the NEs. For details, see Backing Up the NE Data to the System Control Board.
Relevant Task
If the services are configured incorrectly and thus need to be deleted, see Deleting SDH Services.
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