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OSN 500 550 580 V100R008C50 Commissioning and Configuration Guide 02

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Testing the Network Protection Switching

Testing the Network Protection Switching

The protection switching configured in a network protects the services. To ensure that the protection switching is normal in the case of a network fault, the network protection switching needs to be tested.

Testing the Two-Fiber Bidirectional Ring MSP Switching

When a network is configured with two-fiber bidirectional ring MSP, the services carried by the two-fiber bidirectional multiplex section can be protected. You can verify whether the ring MSP works normally by checking the alarms of the ring MSP before and after the switching.

Prerequisites

  • You are an NM user with Operator Group rights or higher.
  • The U2000 user must log in to the NE.
  • The two-fiber bidirectional ring MSP must be created and configured on the U2000. For the configuration, see the Configuration Guide (SDH Transport Domain).
Tools, Equipment, and Materials

U2000

Connection Diagram for the Test

Set up the connection for testing the two-fiber bidirectional ring MSP switching. See Figure 1-28. Assume that a 2 Mbit/s service is configured from NE1 to NE3. The working service travels from NE1, to NE2, and then to NE3.

Figure 1-28  Connection for testing the two-fiber bidirectional ring MSP switching

NOTE:

The process of testing the two-fiber unidirectional ring MSP switching is similar to this process.

Procedure

  1. Log in to the U2000. Right-click the NE1 icon and select NE Explorer.
    1. Shut down the laser of the east optical port of NE1. Select the corresponding board. Choose Configuration > SDH Interface from the Function Tree. Select By Function and select Laser Switch from the drop-down menu.
    2. Select the port to be closed. Set Laser Switch to Close. Click Apply. A dialog box is displayed. Click OK.
  2. Query the alarms of the NEs. NE1 should report the LASER_CLOSED and APS_INDI alarm, and NE2 should report the APS_INDI alarm. This indicates that the MSP switching occurs on NE1 and NE2.
  3. Refer to steps 1 to switch on the laser.
  4. After the WTR timer (10 minutes by default) expires, query the alarms of the NEs. The alarms reported by NE1 and NE2 should be cleared. This indicates that the MSP switching on NE1 and NE2 ends and that NE1 and NE2 are restored to normal.
  5. Refer to steps 1-4 to test each section of the two-fiber bidirectional ring MSP.

Testing 1:N Linear MSP Switching

When a network is configured with linear MSP, the service in the working path of the linear MSP group can be protected. You can verify whether the linear MSP group works normally by checking the alarms and the state of the working channels before and after the switching.

Prerequisites

  • You are an NM user with Operator Group rights or higher.
  • The U2000 user must log in to the NE.
  • The linear MSP must be created and configured on the U2000. For the configuration, see "Configuring 1+1 Linear MSP Services" and "Configuring 1:1 Linear MSP Services" in the Configuration Guide (SDH Transport Domain).
Tools, Equipment, and Materials

U2000

Connection Diagram for the Test

Set up the connection for testing 1+1/1:N linear MSP switching. See Figure 1-29. Assume that a 2 Mbit/s service is configured from NE1 to NE2.

Figure 1-29  Connection for testing linear MSP switching

Procedure

  1. Log in to the U2000. Right-click the NE1 icon and select NE Explorer.
    1. Shut down the laser the working channel of NE1 to trigger the linear MSP switching. Select the corresponding board. Choose Configuration > SDH Interface from the Function Tree. Select By Function and select Laser Switch from the drop-down menu.
    2. Select the port to be closed. Set Laser Switch to Close. Click Apply. A Confirm dialog box is displayed. Click OK. A Prompt dialog box is displayed. Click OK. Click Close.
  2. Query the alarms of the NEs.

    • If the switching mode of the linear MSP is set to Dual-Ended Switching, NE1 should report the LASER_CLOSED and APS_INDI alarms, and NE2 should report the APS_INDI alarm.
    • If the switching mode of the linear MSP is set to Single-Ended Switching, NE1 should report the LASER_CLOSED alarm, and NE2 should report the APS_INDI alarm.
    NOTE:

    For 1+1 linear MSP, the switching mode can be set to Dual-Ended Switching or Single-Ended Switching. For 1:N linear MSP, the switching mode always takes the default value Dual-Ended Switching.

  3. Refer to step 1 to switch on the laser.
  4. After the WTR timer (10 minutes by default) expires, test the BER by using the BER tester again. Query the alarms of the NEs.

    • If Revertive Mode of the linear MSP is set to Revertive, the alarms of NE1 and NE2 should be cleared.
    • If Revertive Mode of the linear MSP is set to Non-Revertive, do as follows:
      • The APS_INDI alarm persists.
      • Log in to the U2000. Choose Service > SDH Protection Subnet > Maintain SDH Protection Subnet.
      • Select the corresponding linear MS protection subnet. Choose Protection Subnet Maintenance > Start/Stop Protocol > Stop the Protocol Networkwide. A Protection Attributes dialog box is displayed. Click Yes continuously. A Prompt dialog box is displayed. Click OK.
      • Then, choose Start/Stop Protocol > Start the Protocol Networkwide. A Protection Attributes dialog box is displayed. Click Yes continuously. A Prompt dialog box is displayed. Click OK.
      • Click Query. Check the state of the working channels. The state must be Normal.

Testing the SNCP Switching

When a network is configured with SNCP, the path services and cross-subnet services can be protected. You can verify whether the SNCP works normally by checking the alarms and events of the SNCP protection group before and after the switching.

Prerequisites

  • You are an NM user with Operator Group rights or higher.
  • The U2000 user must log in to the NE.
  • The SNCP must be created and configured on the U2000. For the configuration, see "Configuring Services on the SNCP Ring" in the Configuration Guide (SDH Transport Domain).
Tools, Equipment, and Materials

U2000

Connection Diagram for the Test

Set up the connection for testing the SNCP switching. See Figure 1-30. Assume that a 2 Mbit/s service is configured from NE1 to NE3. The route of the working service is as follows: NE1-NE2-NE3; the route of the protection service is as follows: NE1-NE4-NE3.

Figure 1-30  Connection for testing the SNCP switching

Procedure

  1. Log in to the U2000. Right-click the NE1 icon and select NE Explorer.
    1. Shut down the laser of the east optical port of NE1. Select the corresponding board. Choose Configuration > SDH Interface from the Function Tree. Select By Function and select Laser Switch from the drop-down menu.
    2. Select the port to be closed. Set Laser Switch to Close. Click Apply. A dialog box is displayed. Click OK.
  2. Log in to the U2000. NE1 should report the LASER_CLOSED alarm and NE3 should report the SNCP Switching event. It indicates that the SNCP switching occurs.

    NOTE:

    The SNCP switching occurs only when a station fails to receive services. The laser of NE1 is shut down in Step 1. The SNCP switching, however, is performed at NE3, which fails to receive the services from the working channel.

  3. Refer to step 1 to switch on the laser. Wait for the WTR time (10 minutes by default).

    • If the revertive mode of the SNCP is set to Revertive, the alarm of NE1 and the event of NE3 should be cleared.
    • If the revertive mode of the SNCP is set to Non-Revertive, do as follows:
      • Log in to the U2000. Right-click the NE3 icon and select NE Explorer.
      • Choose Configuration > SNCP Service Control from the Function Tree. Select all the services from the working service window. Choose Function > Forced to Working. A dialog box is displayed. Click OK. A second dialog box is displayed. Click Close.
      • Choose Function > Clear. A dialog box is displayed. Click OK. A second dialog box is displayed. Click Close.
      • Choose Function > Query Switching Status. A dialog box is displayed. Click Close. Current Status must be Normal.
      • Query the U2000 the alarm of NE1 and the event of NE3 should be cleared.

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Updated: 2019-01-21

Document ID: EDOC1100020976

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