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Fat AP and Cloud AP V200R008C00 CLI-based Configuration Guide

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Common Configuration Errors

Common Configuration Errors

This section describes the common configuration errors and provides the troubleshooting methods.

Local and Remote Interfaces Have Different Duplex Modes, Rates, and Negotiation modes

Fault Description

An interface frequently alternates between Up and Down.

Troubleshooting Procedure
  1. Run the
    display interface [ interface-type [ interface-number ] ]
    command to check the duplex mode, speed, and negotiation mode of the interface.
    • View the Negotiation field.
      1. ENABLE: indicates that the interface works in auto-negotiation mode.
      2. DISABLE: indicates that the interface works in non-auto negotiation mode.

      The two interfaces must work in the same negotiation mode. Run the negotiation auto command in the interface view to enable auto negotiation on the interfaces. If the fault persists, disable auto negotiation and forcibly set the same speed and duplex mode on the interfaces.

    • View the Speed field. If the two interfaces work at different speeds in the non-auto negotiation state, run the speed command in the interface view to set the same rate on the two interfaces.
    • View the Duplex field. If the two interfaces work in different duplex modes in non-auto negotiation mode, run the duplex command in the interface view to set the same duplex mode on the two interfaces.
Updated: 2019-01-11

Document ID: EDOC1000176006

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