Device Power-On: The Device Restarts Unexpectedly or Repeatedly

Symptom

The device restarts unexpectedly or repeatedly.

Possible Causes

• The hardware is faulty or the software has a bug.
• Other errors occur on the device.

Procedure

1. Check the reasons of a device reset.

   Run the display reset-reason command to check the device reset reason.

   For details about common reset reasons and handling suggestions, see the description of this command in the product documentation.

2. If the fault is not caused by the preceding reasons, a hardware fault occurs or the software has bugs. Contact technical support personnel.
   Collect the following information and provide the information to technical support personnel for fault location.

   Do not power off the device before collecting information.

   1. Collect information according to Information Collection.
   2. Run the following commands to collect information:

      In V200R005C10 and earlier versions:

      <AC> display reset-reason 
      <AC> system-view 
      [AC] diagnose 
      [AC-diagnose] display inspect black-box record 8 0 0 0 
      [AC-diagnose] display inspect black-box record 10 0 0 0 
      [AC-diagnose] display inspect black-box record 12 0 0 0 
      [AC-diagnose] display inspect black-box record 13 0 0 0 
      [AC-diagnose] set kernel-monitor irq 
      [AC-diagnose] display kernel-monitor irq level 1 
      [AC-diagnose] display kernel-monitor irq level 2 
      [AC-diagnose] display kernel-monitor irq level 3 
      [AC-diagnose] display lastwords all

      In V200R006C10 and later versions:

      <AC> display reset-reason 
      <AC> system-view 
      [AC] diagnose 
      [AC-diagnose] display inspect black-box record assert all 
      [AC-diagnose] display inspect black-box record deadloop all 
      [AC-diagnose] display inspect black-box record error all 
      [AC-diagnose] display inspect black-box record exception all 
      [AC-diagnose] set kernel-monitor irq 
      [AC-diagnose] display kernel-monitor irq record-range 1 
      [AC-diagnose] display kernel-monitor irq record-range 2 
      [AC-diagnose] display kernel-monitor irq record-range 3 
      [AC-diagnose] display lastwords all