How to configure clocks on OSN 3500 (2)

Configuring clocks on Huawei SDH OSN 3500, OSN 7500, OSN 1500, you should need to do the following steps, we will show you how to configure the clock source protection this article.

1 Configuring the NE Clock Source

2 Configuring the Clock Source Protection

How to Configure the Clock Source Protection

On a complicated clock network, you need to configure the clock protection for all NEs. After you set the clock source and specify the clock priority level for the NEs, you can enable the standard SSM or extended SSM protocol to prevent the NEs from tracing an incorrect clock source. This is how the clocks are protected.

Prerequisites

You must be an NM user with NE operator authority or higher.

Procedure

Step 1 In the NE Explorer, select an NE and choose Configuration > Clock > Physical Layer Clock > Clock Subnet Configuration from the Function Tree.

Step 2 Click the Clock Subnet tab. Click Query to query the existing parameter settings.

Step 3 Select Start Standard SSM Protocol or Start Extended SSM Protocol.

NOTE

The same SSM protection protocol must be used for the same clock protection subnet.

Step 4 Set the subnet number of the clock subnet that the NE belongs to.

NOTE

Allocate the same subnet number to NEs tracing the same clock source.

Step 5 Optional: If the extended SSM protocol is enabled, set the clock ID of the clock source.

Step 6 Click Apply. In the Operation Result dialog box, click Close.

Step 7 Optional: If the clock ID is specified for the line clock of an NE, click the Clock ID Status tab, and set the Enabled Status to Enabled. Click Apply. In the Operation Result dialog box, click Close.

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How to configure clocks on OSN 3500 (1)

A clock is the basis for the normal running of NEs. You must configure clocks for all NEs prior to configuring services. In addition, you need to configure clock protection for complex networks.

Configuring clocks on OSN 3500, OSN 7500, OSN 1500, you should need to do the following steps, we will show you how to configure the NE clock source this article.

1 Configuring the NE Clock Source

2 Configuring the Clock Source Protection

How to configure the NE clock source

Before configuring services, you must configure the NE clock source and specify the priority level to ensure that correct clock tracing relationships are created for all the NEs in the network.

Prerequisites

You must be an NM user with NE operator authority or higher.

Background Information

To implement clock protection, you must configure at least two traceable clock sources for the equipment. Usually, the tributary clock is not used as the clock source for the equipment. After you set the clock sources for all the NEs, query the networkwide clock tracing status again.

Procedure

Step 1 In the NE Explorer, select an NE and choose Configuration > Clock > Physical Layer Clock > Clock Source Priority from the Function Tree.

Step 2 Click Query to query the existing clock source.

Step 3 Click Create. In the Add Clock Source dialog box, select a new clock source and click OK.

Step 4 Optional: If an external clock source is selected, select External Clock Source Mode based on the type of external clock signals. In the case 2 Mbit/s clocks, specify Synchronous Status Byte to deliver SSM messages.

Step 5 Select a clock source, and click

 to adjust its priority level. The clock sources are arranged in descending order. The clock source on top is preferred for the NE.

NOTE

Internal clock sources have the lowest priority because of their low precision.

Step 6 Click Apply. In the Operation Result dialog box, click Close.

NOTE

If the clock tracing relationship changes because of change in the clock source, the Prompt dialog box is displayed, asking you whether to refresh the clock tracing relationship. Click OK. If you select Disable Prompting Next Time, no prompt is displayed even when the clock tracing relationship changes.

Step 7 Optional: If you select the line clock as the phase-locked source, you need to specify the priority table for the phase-locked sources. Click the Priority Table for Phase-Locked Sources of 1^st External Clock Output tab, and then click Create. In the dialog box that is displayed, select the phase-locked source, and click OK.

Step 8 Click Apply. In the dialog box that is displayed, click Close.

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Configuring DNI Protection on OSN 3500

Configuring DNI Protection on OSN 3500

You can create DNI protection for the interworking nodes of two rings, and for the protection of the interworking services between two ring networks. The network can be a combination of equipment from different vendors or different protection modes. Moreover, DNI is also available to fiber and node failures.

Prerequisites

1 You must be an NM user with NE and network maintainer authority or higher.

2 NE data must be configured, and fibers must be properly created.

3 Protection subnets must be created for the two rings for which you want to create DNI

protection.

4 The DNI protection cannot be created on four-fiber rings.

Context

Figure 1 shows a sample networking of DNI protection.

Figure 1 DNI protection example

NE3 or NE5 is the master node while the NE4 or NE6 is the slave node.

Procedure

Step 1 Choose Service > SDH Protection Subnet > Create DNI from the Main Menu to display the Create Protection Subnet dialog box.

Step 2 Enter the name of the protection subnet,

for example, DNI_1.

Step 3 Double-click the icons of NE3 and NE4 on the view, and select them as the master and slave nodes respectively for the DNI protection.

NOTE

When you select DNI nodes on a protection ring, the west node is the master node and the east node is the slave node.

Step 4 Click Next to select the protection subnet to which the nodes are associated. Select the associated protection subnet from the protection subnet list: 2f-MS-SPRING_1.

Step 5 Click Finish to deliver the configuration data.

Step 6 Repeat Steps 2 through 6 to create the master node and the slave node, which are NE5 and NE6.

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Creating a Linear MS Protection Subnet

In a chain network, an NE can protect a service in different sections of the fiber after a linear MS protection subnet is created.

How to creat a Linear MS Protection Subnet on Huawei SDH，such as OSN 3500, OSN 1500 …

Prerequisites

A You must be an NM user with NE and network maintainer authority or higher.

B The NE data must be configured, and fibers must be properly created.

Context

Fibers that are related to a linear MSP cannot be used by other protection subnets. That is, a linear MSP and other subnets cannot create virtual fibers together.

Procedure

Step 1 Choose Service > SDH Protection Subnet > Create 1+1 Linear MSP from the Main Menu to display the Create Protection Subnet dialog box.

NOTE

To create a M:N linear MS protection scheme, choose Service > SDH Protection Subnet > Create M:N Linear MSP from the Main Menu to display the related dialog box.

Step 2 Enter the name of the protection subnet.

The default name is usually used, for example, 1+1_MSP_1.

Step 3 Select the rate of the protection subnet, for example, STM-4.

Step 4 Set Revertive Mode and Switching Mode based on the protection type and requirements.

NOTE

1 For M:N linear MS protection scheme, set the number of working links to N. M indicates the number of protection links and cannot be set. Currently, the value is 1 only.

2 Revertive Mode refers to the handling strategy adopted after the faulty line recovers to normal.

3 Non-Revertive: The service does not automatically revert to the working channel after the faulty line recovers to normal.

4 Revertive: The service automatically reverts to the working channel after the faulty line recovers to normal.

5 Switching Mode refers to the switching strategy adopted after a fault occurs to the line.

6 Single-ended switching: To protect services, switching occurs at the receive end when the receive end is faulty and at the transmit end when the transmit end is faulty.

7 Dual-ended switching: To protect services, the switching occurs at the receive and transmit ends when either end is faulty.

8 If multiple protection subnets uses one port of a board, you need to check the Resource Sharing check box.

If different protection subnets use different ports of a board, do not check this check box.

9 Select the Assigned by VC4 option when there are different VC4s belonging to different protection subnets to achieve MSP only in some channels protection. For example, for an STM-16 fiber, the VC4s 1-4 belong to an STM-4 MSP, and VC4s 5-8 belong to a PP.

Step 5 Add nodes to the protection subnet to be created. Double-click the NE on the Main Topology to add it to the node list in the left-hand pane. Meanwhile, is displayed on the NE icon. If you want to cancel the selection, double-click the NE again.

Step 6 Click Next to proceed to the Select Link of the wizard. Set the Physical Link Information of Working Link and Protection Link.

Step 7 Click Finish to deliver the configuration data. The Operation Result prompt box is displayed. Click Close.

Step 8 Right-click the protection subnet and choose Protection Subnet Attributes from the shortcut menu.

Step 9 Click the Protection Subnet Maintenance tab to check whether the protocol controller starts. If not, do as follows:

1. Select all the NEs of the protection subnet.

2. Right-click and choose Start/Stop Protocol > Start from the shortcut menu.

3. Click Yes in the dialog box that is displayed twice. Ensure that the status of all the values in the Protocol Controller column is Protocol Started.

Step 10 Click the Protection Subnet Parameters tab and set the WTR time and SD condition as needed. Click Apply to deliver the configuration.

NOTE

The WTR time of all NEs in the same protection subnet should be the same.

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Creating an MS Ring Protection Subnet

The OptiX OSN equipment supports various network level protection schemes, including the linear MSP and ring MSP. Configuring the Protection Subnet on Huawei SDH. In this article, we will learn how to Configure a Non-Protection Ring.

The MS ring protection scheme is adopted in a common ring network. Normally, it is adopted to protect a channel to transmit additional services. By running the APS protocol, it achieves the MS level protection.

Prerequisites

A You must be an NM user with NE and network maintainer authority or higher.

B The NE data must be configured, and fibers must be properly created.

Context

A The number of nodes in an MSP ring cannot exceed 16.

B When creating a protection subnet, select SDH NEs only. It is not required to select REG or WDM equipment.

The steps:

Step 1 Choose Service > SDH Protection Subnet > Create 2f_MS_SPRing from the Main Menu.

The Prompt dialog box is displayed. Click OK to display the Create Protection Subnet dialog box.

NOTE

1 To create a four-fiber bidirectional MS shared protection ring, choose Service > SDH Protection Subnet > Create 4f_MS_SPRing from the Main Menu to display the related dialog box.

2 To create a two-fiber unidirectional MS shared protection ring, choose Service > SDH Protection Subnet > Create 2f_MS_DPRing from the Main Menu to display the related dialog box.

Step 2 Enter the name of the protection subnet.

The default name is usually used, for example, 2f_MS SPRing_1.

Step 3 Select the rate of the protection subnet, for example, STM-4.

Step 4 Select Resource Sharing and Assigned by VC4 as needed.

NOTE

1 If multiple protection subnets use one port of a board, you need to check the Resource Sharing check box. If MSP Sharing is enabled, you can check the Resource Sharing check box to map a port of the board to multiple MSPs. If different protection subnets use different ports of a board, do not check this check box.

2 Select the Assigned by VC4 option when there are different VC4s belonging to different protection subnets to achieve MSP only in some channels protection. For example, for an STM-16 fiber, the VC4s

1-4 belong to an STM-4 MSP, and VC4s 5-8 belong to a PP.

3 OptiX OSN 1500/2500/3500/3500 II/7500

/7500 II do not support Transoceanic Protocol.

Step 5 Add nodes to the protection subnet to be created. Double-click the NE on the Main Topology to add it to the node list in the left-hand pane. Meanwhile, is displayed on the NE icon. If you want to cancel the selection, double-click the NE again.

 NOTE

For easy maintenance, the nodes should be added anticlockwise to the protection subnet.

Step 6 Set the attribute of the nodes. Select MSP Node in this example.

Step 7 Click Next to proceed to the Select Link screen of the wizard. Set parameters, such as Physical Link Information.

NOTE

1 If there are multiple fibers between two NEs, select them from the Physical Link Information dropdown list.

2 If Assigned by VC4 is selected, you can select the working and protection VC4 timeslots as needed.

Step 8 Click Finish to deliver the configuration data. Then the Operation Result prompt box is displayed. Click Close.

Step 9 Right-click the protection subnet and choose Protection Subnet Attributes from the shortcut menu.

Step 10 Click the Protection Subnet Maintenance tab to check whether the protocol controller starts. If not, do as follows:

1. Select all the NEs of the protection subnet.

2. Right-click and choose Start/Stop Protocol > Start from the shortcut menu.

3. Click Yes in the dialog box that is displayed twice. Ensure that the status of all the values in the Protocol Controller column is Protocol Started.

Step 11 Click the Protection Subnet Parameters tab and set the WTR time and SD Condition as needed. Click Apply to deliver the configuration. The WTR time of all NEs in the same protection subnet should be the same.

NOTE

The default value is 600s.

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