• Supported Platforms
• MX80 Routers

• Related Topics
• MX80 Power System Description
• MX80 Power Supply LED
• Troubleshooting the MX80 Power Supplies
• show chassis environment pem
• show chassis alarms

Maintaining the MX80 Power Supplies

Purpose

For optimum router performance, verify the condition of the power supplies.

Action

On a regular basis:

• Check the status of the power supplies by issuing the show chassis environment pem command. The output is similar to the following:
  
  

  user@host> show chassis environment pem

  PEM 0 status:
    State                      Online
    Temperature                OK
    DC Output:                 OK
  PEM 1 status:
    State                      Online
    Temperature                OK
    DC Output:                 OK
  

• Make sure that the power and grounding cables are arranged so that they do not obstruct access to other router components.
• Routinely check the status LEDs on the power supply faceplates and the front panel to determine if the power supplies are functioning normally.
• Check the alarm LEDs on the front panel. Power supply failure or removal triggers an alarm that causes one or both of the LEDs to light. You can display the associated error messages by issuing the show chassis alarms command:
  
  

  user@host> show chassis alarms

  1 alarm currently active
  Alarm time               Class  Description
  2010-02-03 13:46:31 PST  Major  PEM 0 Not OK

• Periodically inspect the site to ensure that the grounding and power cables connected to the router are securely in place and that there is no moisture accumulating near the router.