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ME60 Troubleshooting Guide V1.0 (VRPv8)

This document provides the maintenance guide of the device, including daily maintenance, emergence maintenance, and typical troubleshooting.
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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).
Interface Troubleshooting

Interface Troubleshooting

This chapter describes common causes of interface faults and provides troubleshooting flowcharts and procedures, alarms, and logs to help identify and rectify these faults.

Trap About an Interface Down Event

This chapter describes common causes of an interface Down event and provides troubleshooting flowcharts and procedures, alarms, and logs to help identify and rectify these faults.

Common Causes

Common causes are as follows:

  • Settings of an optical module or a link are incorrect.
  • An optical fiber is not installed properly.
  • The Rx and Tx connectors are incorrectly connected on two ends of an optical fiber.
  • Ports on both ends of an optical fiber have different settings.
Troubleshooting Flowchart

After physical ports of two ME60s are connected, the ports cannot go Up. The display this interface command output shows that the interface is DOWN (port alarm down), which means that a trap about an interface Down event is generated.

The troubleshooting roadmap is as follows:
  • If 10GE WAN ports are used, check that the local settings are correct.
  • If 10GE WAN ports are not used, check that the optical fiber and module are properly corrected.
Figure 4-28 shows the troubleshooting flowchart.
Figure 4-28 Flowchart for troubleshooting an interface Down event

Troubleshooting Procedure

NOTE:

After the commands are configured to troubleshoot the faults, check the configuration validation mode to ensure that the configurations take effect. Unless otherwise specified, this manual defaults to immediate validation mode.

  • In immediate validation mode, the configurations take effect after the commands are entered.
  • In two-phase validation mode, after the commands are configured, the commit command needs to be run to commit the configurations.

Save the results of each troubleshooting step so that if your troubleshooting attempts fail to correct the fault, you will have a record of your actions to present to Huawei.

Procedure

  1. Check the port type.

    • If 10GE WAN ports are used, go to step 2.
    • If ports other than 10GE WAN ports are used, go to step 3.

  2. Check that the connected ports have the same configuration.

    Run the display interface interface-type interface-number command. Check whether the two ports have the same values in the CRC and Scramble fields.

    If the two ports have the same settings, go to step 3.

    If the two ports have different settings, change the configuration on one end to ensure setting consistency. Then run the port-alarm clear command to attempt to clear the trap. If the trap persists, go to step 6.

  3. Check that the input and output optical power values are within a specified range and the number of B1, B2, or B3 error codes is not increased.

    Run the display interface interface-type interface-number command. View the command output before determining an operation:

    • If the optical power of the Tx connector is out of the specified range, replace the optical module.
    • If the optical power of the Rx connector is less than specified receiver sensitivity, properly adjust the link settings or replace the optical module on the remote end.
    • If the statistics on B1, B2, and B3 error codes in the SDH error field increase, perform either of the following operations based on real-world situations:
      • If the statistics on all B1, B2, and B3 error codes increase, check whether the directly connected link and the optical modules on both ends of the link are working stably.

      • If only the number of B3 error codes increases, check whether the link directly connecting the remote ME device and SDH transmission device is working and stable.

    After completing these operations, run the port-alarm clear command to attempt to clear the trap. If the trap persists, go to step 4.

  4. Check whether the optical fiber and module are installed properly.

    Loose-proof pinches are installed on the optical module and fiber. If the installed optical fiber or module produces a click, it is installed properly.

    Run the port-alarm clear command to attempt to clear the trap. If the trap persists, go to step 5.

  5. Check whether the Rx and Tx connectors are connected properly.

    Remove the optical fiber, interchange the Rx and Tx connectors, and install the optical fiber. If the fault is rectified, perform the following operation. If the fault persists, interchange the RX and Tx connectors again.

    Run the port-alarm clear command to attempt to clear the trap. If the trap persists, go to step 6.

  6. Contact Huawei and provide the following information:

    • Results of this troubleshooting procedure
    • Configuration, log, and alarm files

Relevant Alarms and Logs

Relevant Alarms

DEVM_1.3.6.1.4.1.2011.5.25.157.2.1 hwPhysicalPortCrcError

PIC_1.3.6.1.4.1.2011.5.25.157.2.157.7 hwPhysicalPortBip8SdError

Relevant Logs

None

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Updated: 2019-06-11

Document ID: EDOC1000175918

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