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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).
Guide to Handling Emergencies

Guide to Handling Emergencies

This section guides you how to handle emergencies.

Failed to Log in to the System Through the Serial Interface

Fault Symptom

After the serial interface of a PC or a terminal is connected to the console interface of the ME60 through the cable and the relevant parameters are set, nothing is displayed on the terminal.

Fault Information Collection

If you are unable to log in to the system through the serial interface, collect the following information besides the generic information described in the Chapter "Guide to Collecting Fault Information" for future reference.

Table 3-2 Fault information table

No.

Item

Collection Method

1

Communications parameters of the serial interface

Check whether the communication parameters set for the software such as Windows-based HyperTerminal for the communication between serial interfaces are consistent with the communication parameters set on the console port of the ME60, such as the bard rate, data bit, parity check or not, stop bit, and flow control or not.

2

Indicator status

Check the status of the following indicators:
  • RUN, ALM, LINK, and ACT indicators of the main control boards

  • PWR IN, PWR OUT, and ALM indicators of the power modules

  • RUN and ALM indicators of the fans

Processing Procedure
Figure 3-3 Flow chart of solving the problem that users cannot log in to a system through the serial interface

All the following steps are performed only when the customer's services are already interrupted, and therefore have no adverse effect on services. If the customer's services are not interrupted, do not perform the following steps. Instead, collect fault information and feed it back to Huawei engineers for further processing.

Procedure

  1. Check and repair the power supply system.

    When you find that the indicators of all the boards are off and all the fans fail to work (which can be identified by fan's rotating), or the ALM indicator of the power module is on, the power supply system of the device is possibly faulty and need repairing. The power supply system consists of the following:

    • Power supply system of the equipment room, chassis, or cabinet

    • Power module

    • Power supply system of the backplane

    You can solve the problem according to the steps:

    1. Check whether the power module is switched on. When there are multiple power modules, ensure that at least one works normally.
    2. Check whether the PWR IN indicator of the power module is on. If not, it can be concluded that the power input of the power module is abnormal. You can use tools such as a multimeter to check the power supply of the equipment room, chassis, and cabinet. If the power supply is abnormal, ask electricians for help.
    3. Check whether the PWR OUT indicator of the power module is on. If not, it can be concluded that the power output of the power module is abnormal. You can replace the power module to solve the problem.
    4. Check whether the ALM indicator of the power module is on. If so, it can be concluded that the power module is faulty. You can replace the power module to solve the problem.
    5. When none of the preceding problems is found, but the power supply system fails to work, seek Huawei technical support according to Technical Support.
  2. Check and replace the cable.

    Check whether the cable is in good condition. You can replace the cable with a new one to check that you can normally log in.

  3. Check parameters of the serial interface.

    Check whether parameters set for the serial interface are identical with those for the console interface on the ME60. If not, modify the parameters of the serial interface.

    By default, set the baud rate of the console interface on the ME60 to 9600 bit/s, data bit to 8, stop bit to 1, and parity check and flow control to none. When the parameters of the console interface are modified, adopt the modification.

  4. Exchange and replace the MPU.

    If the serial interface, cable, power supply system are normal, the problem may be caused by the fault on the MPU and you need to replace it according to the 'Replacing an MPU' chapter in 'Parts Replacement'.

  5. Reset the system.

    If the fault persists after the preceding steps are performed, you can reset the system by switching off the power module and then switching it on three minutes later to solve the problem. For details, see Guide to Restarting a Device.

  6. Seek Huawei technical support.

    If the fault persists after the preceding steps are performed, you can seek Huawei technical support according to "Technical Support".

Failed to Start the System

Fault Symptom

The system is failed to be started and the prompt may be displayed on the terminal as follows:

  • "The SDRAM testing......FAIL!", which indicates that the self-test of memory fails.

  • "XXXXX selftest......FAIL!", which indicates that the self-test of a certain module fails.

  • The system remains in the phase of file decompression for a long time.

  • The system is repeatedly restarted.

Fault Information Collection
If you are unable to start the system, collect the following information besides the generic information described in the chapter "Guide to Collecting Fault Information" for future reference.
Table 3-3 Fault information table

No.

Item

Collection Method

1

System startup information

Copy system startup information on the console such as the serial interface or Telnet terminal to a txt. file for storage.

2

Name of the startup file

Check the name of the startup file through the Basic Input/Output System (BIOS) menu.

Processing Procedure
Figure 3-4 Flow chart of solving the problem that the system cannot be started

All the following steps are performed only when the customer's services are already interrupted, and therefore have no adverse effect on services. If the customer's services are not interrupted, do not perform the following steps. Instead, collect fault information and feed it back to Huawei engineers for further processing.

Procedure

  1. Check and repair the power supply system.

    When you find that the indicators of all the boards are off and all the fans fail to work (which can be identified by fan's rotating), or the ALM indicator of the power module is on, the power supply system of the device is possibly faulty and need repairing. The power supply system consists of the following:

    • Power supply system of the equipment room, chassis, or cabinet

    • Power module

    • Power supply system of the backplane

    You can solve the problem according to the steps:

    1. Check whether the power module is switched on. When there are multiple power modules, ensure that at least one works normally.
    2. Check whether the PWR IN indicator of the power module is on. If not, it can be concluded that the power input of the power module is abnormal. You can use tools such as a multimeter to check the power supply of the equipment room, chassis, and cabinet. If the power supply is abnormal, ask electricians for help.
    3. Check whether the PWR OUT indicator of the power module is on. If not, it can be concluded that the power output of the power module is abnormal. You can replace the power module to solve the problem.
    4. Check whether the ALM indicator of the power module is on. If so, it can be concluded that the power module is faulty. You can replace the power module to solve the problem.
    5. When none of the preceding problems is found, but the power supply system fails to work, seek Huawei technical support according to Technical Support.
  2. Insert and remove the memory bar.

    When the system displays "The SDRAM testing......FAIL!", the memory bar is possibly loose or is incorrectly inserted (only when there is a single memory bar). You can try the following operations to solve the problem:

    1. Remove the MPU.
    2. Remove the memory bar and then re-insert it. When there is only one memory bar, check whether it is inserted in slot 1. If so, remove it and then insert it in slot 2.
    3. Re-insert the MPU.
  3. Replace the memory bar.

    If the problem cannot be solved by removing and re-insertion of the memory bar, the memory bar is possibly faulty. You can replace the memory bar with a new one of the same specification. For the type and specification of memory bars, contact Huawei technical support personnel.

  4. Exchange and replace the MPU.

    When the system prompts "XX XXX selftest......FAIL!", or the memory self-test still fails after you perform Steps 1 and 2, the MPU is possibly faulty. When there is only one MPU, you can replace it with a spare one.

  5. Upload the startup file through BIOS again.

    When the system remains in the phase of file decompression or is repeatedly restarted, the startup file is possibly incorrect or damaged. You can try to upload the startup file through BIOS.

    It is complicated to upload the startup file through BIOS. Contact Huawei technical support personnel and perform the uploading under their guidance.

  6. Seek Huawei technical support.

    Seek Huawei technical support according to "Technical Support."

Status of Hardware Components Is Abnormal

Fault Symptom
Hardware components refer to hardware modules including board modules, power supply modules, and fan modules. The abnormality of hardware component status includes (one or multiple items):
  • When you run the display device command in any view to view information about a hardware component where services are interrupted, the hardware component status is Abnormal.

  • When you run the display device command in any view to view information about a hardware component where services are interrupted, the hardware component status is Unregistered.

  • The RUN or STATUS indicator of a hardware component blinks or is off, or the ALM indicator of the hardware component is on.

  • The hardware component where services are interrupted is repeatedly restarted.

    NOTE:
    Generally, if the indicator blinks once every 2s (0.5 Hz), the interface board is in the normal state. If the indicator blinks twice every 1s (2 Hz), the interface board is in the alarm state. For details, please refer to HUAWEI ME60 ME device- Hardware Description.
Fault Information Collection
When you find that the status of the hardware component is abnormal, collect the following information besides the generic information described in the Chapter "Guide to Collecting Fault Information" for future reference.
Table 3-4 Fault information table

No.

Item

Collection Method

1

Indicator status of a hardware component

Check that the status of the indicator on a hardware component is off, on, blinking quickly, or blinking slowly. Observe whether the RUN and ALARM indicators of the fan modules and power supply modules are normal. Normally, the RUN indicator is green and the ALARM indicator is off.

2

Detailed information about a hardware component

Run the display device slot-id command in any view to view detailed information about the specified hardware component.

3

Status of a PIC channel

Run the display device pic-status command in any view to collect information about the status of a PIC channel.

Processing Procedure
Figure 3-5 Flow chart of solving the problem that the hardware component status is abnormal

All the following steps are performed only when the customer's services are already interrupted, and therefore have no adverse effect on services. If the customer's services are not interrupted, do not perform the following steps. Instead, collect fault information and feed it back to Huawei engineers for further processing.

Procedure

  1. Reset the hardware component.

    The processing of the hardware component abnormality is complex.

    When you find that the indicators of all the boards are off and all the fans fail to work (which can be identified by fan's rotating), or the ALM indicator of the power module is on, the power supply system of the device is possibly faulty and need repairing. The power supply system consists of the following:

    • Power supply system of the equipment room, chassis, or cabinet

    • Power module

    • Power supply system of the backplane

    You can solve the problem according to the steps:

    1. Check whether the power module is switched on. When there are multiple power modules, ensure that at least one works normally.
    2. Check whether the PWR IN indicator of the power module is on. If not, it can be concluded that the power input of the power module is abnormal. You can use tools such as a multimeter to check the power supply of the equipment room, chassis, and cabinet. If the power supply is abnormal, ask electricians for help.
    3. Check whether the PWR OUT indicator of the power module is on. If not, it can be concluded that the power output of the power module is abnormal. You can replace the power module to solve the problem.
    4. Check whether the ALM indicator of the power module is on. If so, it can be concluded that the power module is faulty. You can replace the power module to solve the problem.
    5. When none of the preceding problems is found, but the power supply system fails to work, seek Huawei technical support according to Technical Support.

    If the abnormality occurs on the fan modules, directly replace the fan modules.

    If a board is abnormal and the situation is urgent, reset and replace the board. Relevant cause location will be performed by Huawei technical support personnel.

    You can reset a board by using the reset slot slot-id command in the user view, pressing the RESET button on the panel, or pulling out and inserting the board.

    NOTE:

    You are recommended not to pull out and insert in the board for resetting. This can avoid damages on the board.

  2. Replace the hardware component.

    When the problem cannot be solved by resetting the hardware component, you can try to replace the hardware component with a spare one.

  3. Cut over services on the board and seek Huawei technical support.

    When the preceding methods cannot solve the problem, you can cut over services on the faulty board to a normal board or a board in a vacant slot. For operation details, contact Huawei technical support personnel or comply with your cutover scheme.

    In addition, report the fault information to the local Huawei office for technical support.

Interface Status Is Abnormal

Fault Symptom
The abnormality of the interface status includes:
  • When the display interface [ interface-type interface-number ] command is run in any view to check an interface where services are interrupted, the interface status is Down.

  • When the display interface [ interface-type interface-number ] command is run in any view to check an interface where services are interrupted, the number of packets transmitted on the interface remains unchanged.

  • When the display interface [ interface-type interface-number ] command is run in any view to check the interface where services are interrupted, a large number of CRC packets are received.

  • The indicator status of an interface is abnormal. For example, the LINK indicator of the interface is off.

Fault Information Collection
When you find the interface status is abnormal, collect the following information besides the generic information described in the chapter "Guide to Collecting Fault Information" for future reference.
Table 3-5 Fault information table

No.

Item

Collection Method

1

Indicator status of an interface

Check whether the indicator (LINK/ACT) on a faulty interface is off, on, or blinking. If the indicator is on, the link is Up. If the indicator is blinking, the data is being received or transmitted. If the indicator is off, the link is Down.

2

Detailed information about an interface

Run the display interface [ interface-type interface-number ] command in any view to collect detailed information about an interface.

3

Brief IP-related information about an interface

Run the display ip interface brief [ interface-type interface-number ] command in any view to collect brief IP-related information about an interface.

4

Brief information about all interfaces

Run the display interface brief command in any view to collect brief information about all interfaces.

Processing Procedure
Figure 3-6 Flow chart of solving the problem that the interface status is abnormal

All the following steps are performed only when the customer's services are already interrupted, and therefore have no adverse effect on services. If the customer's services are not interrupted, do not perform the following steps. Instead, collect fault information and feed it back to Huawei engineers for further processing.

NOTE:
Usually, the interface fault is caused by the problem of the cable or optical module.
  • When the cable is broken or the optical module is damaged, the interface fails to go Up.

  • When the cable or optical module on an interface has been being used for many years, the signal attenuation may be severe. In this case, although the interface is Up, a large number of packets are discarded.

Replace the cable or optical module on the faulty interface. If the problem persists, perform the following operations.

Procedure

  1. Start the interface manually.

    Run the display this in the interface view to check the configuration files of the faulty interface. When you find that an interface is shut down through the shutdown command, run the undo shutdown command in the interface view to start it.

  2. Check the link and rectify the link fault.

    Before checking a link, check whether the LINK indicator of the interface is on.

    If so, it indicates that the physical link is Up and you can detect the link as follows:

    1. Run the display this interface command in the interface view to check whether the interface parameters at both ends of the link are identical, such as the duplex mode and rate.
    2. In the case of optical interfaces, use the optical power meter to check whether the receiving and sending optical signals at both ends are normal. If it is not convenient to use the optical power meter, you can use the optical power detecting function in the optical module: run display this interface in the error interface and compare the parameters in the display information with the optical module parameters, and check whether the power of the send or receive optical signals are in normal range. If optical interfaces only send or receive optical signals, the optical module is possibly faulty or the optical fiber does not match the optical module. Then, you can try to replace the optical module or the optical fiber.
    3. If the interface is an electric interface, observe the pinouts in the RJ-45 connectors on both ends of the case to check whether the cable should be straight-through or crossover cable for the specified interface.

    When you check the receiving and sending of optical signals, do not look into the optical fiber without eye protection. You must use the optical power meter to measure the optical power.

    When the LINK indicator of the interface is off, you can check the link as follows:

    1. Perform a physical loopback test on the device. That is, connect the faulty interface to an interface is in the normal state through an optical fiber or cable in good condition. Pay attention to the two interfaces' type should match with each other.
    2. If the LINK indicator is on, it indicates that the interface is normally. In this situation, you need to check whether the optical fiber or cable is damaged and the trunk link runs normally. Usually, you need to check the optical fibers, cables, and trunk links at the neighboring sites.
    3. If the LINK indicator is off, it indicates that the interface hardware is faulty. When a pluggable optical module is used, you can replace the optical module; otherwise, cut over services on the faulty interface to other interfaces in the normal state.
  3. Conduct a local loopback test.

    When the interface status is Up, but the number of packets transmitted on the interface remains unchanged during a specified period, it indicates that the interface can neither receive nor send any packets. In this situation, you can run the loopback local command on the interface to perform a local loopback test and then run the ping command to initiate a data transmission test to check whether the number of packets changes. After the local loopback test is complete, run the undo loopback command to disable the local loopback.

    NOTE:
    The procedures of testing the receiving and sending of packets through the ping command in Ethernet interfaces are as follows:
    1. Run the arp static ip-address mac-address command in the system view to construct an IP address on the same segment with the faulty interface and a MAC address in the local ARP table. You can select the MAC address at will, but it cannot be the local MAC address, a broadcast or multicast address.
    2. Run the ping command in the view of the faulty interface ( it does not matter that ping succeed or failed. ) to send a certain number of ping packets to the constructed IP address.
    3. Run the display this interface command in the view of the faulty interface to check whether the number of received and sends packets are correct. Because the ARP is just configured, the first ping may discard a few packets. Ping for the second time, the number of received and sent packets will equal. If so, the local loopback test is successful and this indicates that the local interface is normal.
    4. Run undo arp static command to delete the MAC address, and run undo loopback command in the interface view to disable the local loopback.

    Above operation can only location interface faulty. If the interface is OK, maybe the optical module is faulty. You can location optical module faulty as follows: connect the RX and TX ports of optical module with two ends of an optical fiber, and run undo shutdown in interface view to test the receiving and sending of packets again.

  4. Check and modify the data link layer or upper layer protocol.

    If the interface still fails to send and receive packets in the local loopback test, check the data link layer or upper layer protocol. For example, check whether the Point-to-Point Protocol (PPP) at both ends are identical and the routing protocol runs normally.

  5. Reset the interface.

    If the fault persists after the preceding steps are performed, you can reset the interface to solve the problem.

    Run the shutdown command to disable the interface, and then run the undo shutdown command to enable the interface to reset the interface.

  6. Seek Huawei technical support.

    Seek Huawei technical support according to Technical Support.

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Updated: 2019-06-11

Document ID: EDOC1000175918

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