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S12700 V200R010C00 Configuration Guide - Device Management

This document describes the principles and configurations of the Device Management features, and provides configuration examples of these features.
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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).
What Can I Do If the CPU Usage Is High?

What Can I Do If the CPU Usage Is High?

If a device has a high CPU usage, perform the following operations:
  1. Check whether the CPU usage keeps increasing or increases suddenly. If the CPU usage increases suddenly, an operation may be performed, for example, a card has just started, information about optical modules is read continuously, and traffic volume increases suddenly. This situation does not affect the device operation.
  2. Check which task process causes a high CPU usage and analyze the task.
  3. Check log information and alarm information to determine whether a hardware fault alarm has been generated.
  4. Use log information and alarm information to check whether an interface frequently alternates between Up and Down states. If so, check whether the optical module of the interface is faulty or non-Huawei-certified switch optical module. Additionally, analyze the configuration and traffic volume of the interface.
  5. Check whether network management operations are frequently performed on the device.
  6. Check whether STP or routing protocols flap.
  7. Check whether the network structure changes and whether a loop exists.
  8. Check whether an attack is occurring.

For details about how to locate a high CPU usage, see "CPU Usage of a Device Is High" in the Troubleshooting.

Updated: 2019-08-21

Document ID: EDOC1000142080

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