Networking Diagram
You can configure a non-protection ring if the services on the ring do not need to be protected. In this case, all the timeslots on the ring can carry services.
Figure 1 shows a non-protection ring consisting of four pieces of equipment. In this example, the PQ1 boards are used on the source NE (NE1) and the sink NE (NE3) as tributary boards to add and drop services, and the SL16 boards are used as line boards to transmit SDH services.
Figure 1 Networking diagram of the non-protection ring
NOTE:
This topic considers the OptiX OSN 3500 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 services on the non-protection ring, you need to plan the traffic direction and timeslot allocation for the services on the non-protection ring.
Figure 1 shows the signal flow and timeslot allocation. In this example, five E1 services are added to or dropped from NE1 and NE3, and they pass through NE2.
Figure 1 Signal flow and timeslot allocation of the services on the non-protection ring
Configuration Process
Configuration of the services on the non-protection ring is not related to the configuration of the protection subnet. To configure the services on the non-protection ring, configure the SDH services from the tributary board to the line board on the source and sink NEs and the pass-through services on the intermediate NEs if the protection subnet is already created.
Prerequisites
The physical topology of the network must be created.
The NEs, boards, and fibers must be created on the U2000.
Lower order cross-connection resources must meet service configuration requirements. For details on how to query lower order cross-connection resources, see Querying Lower Order Cross-Connection Resources.
The created protection subnet must be consistent with the actual network topology. For details about how to create the protection subnet, see Configuring a Non-Protection Ring.
You must be familiar with the contents in Signal Flow and Timeslot Allocation.
Context
CAUTION:
When the lower order resources are insufficient, do as follows:
Combine available lower order resources.
Use a cross-connect board with a higher lower order cross-connect capacity.
Configure VC-4 services.
Procedure
- At NE1, configure SDH services on the source NE.
- Select NE1 from the NE Explorer, and then choose Configuration > SDH Service Configuration from the Function Tree.
- Click Create on the lower-right pane to display the Create SDH Service dialog box. Set the parameters that are required, and then 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 | Bidirectional | In this example, the services are transmitted and received over the same path. That is, the services areBidirectional services. |
| Source Slot | 2-PQ1 | In this example, the PQ1 board in slot 2 of NE1 is configured as the source tributary board. See Figure 1. |
| Source Timeslot Range(e.g.1,3-6) | 1-5 | In this example, five E1 services are configured between NE1-NE3. Hence, the service source occupies VC-12s 1-5. |
| Sink Slot | 8-N2SL16-1(SDH-1) | In this example, the SL16 board in slot 8 of NE1 is configured as the sink line board. See Figure 1. |
| Sink VC4 | VC4-1 | The service sink uses the timeslots of VC-4-1. |
| Sink Timeslot Range(e.g.1,3-6) | 1-5 | In this example, five E1 services are configured between NE1 and NE2. Hence, the service sink occupies VC-12s 1-5. |
| Activate Immediately | Yes | – |
- At NE3, configure SDH services on the sink NE. Refer to 1. Set the parameters as follows.
| 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 | Bidirectional | In this example, the services are transmitted and received over the same path. That is, the services areBidirectional service. |
| Source Slot | 2-PQ1 | In this example, the PQ1 board in slot 2 of NE3 is configured as the source tributary board. See Figure 1. |
| Source Timeslot Range(e.g.1,3-6) | 1-5 | In this example, five E1 services are configured between NE1-NE3. Hence, the service source occupies VC-12s 1-5. |
| Sink Slot | 11-N2SL16-1(SDH-1) | In this example, the SL16 board in slot 8 of NE2 is configured as the sink line board. See Figure 1. |
| Sink VC4 | VC4-1 | The service sink uses the timeslots of VC-4-1. |
| Sink Timeslot Range(e.g.1,3-6) | 1-5 | In this example, five E1 services are configured between NE1-NE3. Hence, the service sink occupies VC-12s 1-5. |
| Activate Immediately | Yes | – |
- Configure pass-through services on NE2.
- Select NE2 from the NE Explorer, and then choose Configuration > SDH Service Configuration from the Function Tree.
- Click Create on the lower-right pane to display the Create SDH Service dialog box. Set the parameters that are required, and then 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 | Bidirectional | In this example, the services are transmitted and received over the same path. That is, the services areBidirectional services. |
| Source Slot | 11-N2SL16-1(SDH-1) | In this example, the SL16 board in slot 11 of NE2 is configured as the source line board. See Figure 1. |
| Source VC4 | VC4-1 | The service source uses the timeslots of VC-4-1. |
| Source Timeslot Range(e.g.1,3-6) | 1-5 | In this example, five E1 services are configured between NE1-NE3. Hence, the service source occupies VC-12s 1-5. |
| Sink Slot | 8-N2SL16-1(SDH-1) | In this example, the SL16 board in slot 8 of NE2 is configured as the sink line board. See Figure 1. |
| Sink VC4 | VC4-1 | The service sink uses the timeslots of VC-4-1. |
| Sink Timeslot Range(e.g.1,3-6) | 1-5 | In this example, five E1 services are configured between NE1-NE3. Hence, the service source occupies VC-12s 1-5. |
| Activate Immediately | Yes | – |
- Check whether the services are configured correctly. For details, see Verifying the Correctness of the Service Configuration.
- Enable the performance monitoring function of the NEs. For details, see Enabling, Disabling and Setting Performance Monitoring of the NE.
- Back up the configuration data of the NEs. For details, see Backing Up the NE Configuration Data to the SCC Board.
- Relevant Task
If the services are configured incorrectly and need to be deleted, see Deleting SDH Services.
After SDH services are configured on a per-NE basis, you need to perform an SDH trail search so that you can manage configured services by using the trail management function. For details, see Searching for SDH Services.
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