Juniper Networks M160 manual User@host show chassis alarms

M160 Internet Router Hardware Guide

NOTE: The messages in the craft interface LCD and the output from CLI show commands refer to the power supply on the right as PEM 0 and the power supply on the left as PEM 1.

For further description of the output from the command, see the JUNOS

Internet Software Operational Mode Command Reference: Protocols, Class of

Service, Chassis, and Management.

Check the red and yellow alarm LEDs and the LCD on the craft interface. Power supply failure or removal triggers an alarm that causes one or both of the LEDs to light and an error message to appear on the LCD. You can display the associated error messages by issuing the following CLI command:

user@host> show chassis alarms

For a list of possible alarm messages, see “Chassis and Interface Alarm

Messages” on page 209.

Verify that the power source has the proper current rating and that each power supply is connected to a separate power source.

Verify that the cable or cord connecting the power supply to the external power source is securely in place and that there is no moisture accumulating near the router.

Verify that the cable or cord from the power source to the router is not damaged. If the insulation is cracked or broken, replace the cable or cord immediately.

Verify that the power cables or cord do not touch or obstruct access to other router components, and that they do not drape where people could trip on them.

Verify that the air flow in and out of cooling system components is not obstructed.

138 Maintaining Power Supplies