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The Status of the Physical Link Fails to Change to Up

Publication Date:  2012-07-27 Views:  223 Downloads:  0
Issue Description

Run the display interface [ interface-type [ interface-number ] ] command to view the current status of the interface, the status of the physical link cannot change to Up.

Alarm Information
Handling Process
  1. Check the line connection of the interface. If the connection is incorrect or the line is in bad contact, reconnect the line.
  2. In the interface view, run the display this command to check whether the physical attributes of the interfaces at both ends are configured the same. If they are differently configured, modify the parameter configurations.
  3. After modifying the parameter configurations, in this interface view, run the shutdown command, and then run the undo shutdown command to restart the interface.
Root Cause

The possible causes that the status of the physical link cannot change to Up are as follows:

  • The line is incorrectly connected.
  • The interface parameters are incorrectly configured.

When a physical interface is configured, the physical parameters at both ends must be configured the same.