Juniper Networks M160 manual Troubleshooting PICs, Troubleshooting the Power System

Troubleshooting Hardware Components

Troubleshooting PICs

To troubleshoot the PICs, follow these guidelines:

To check the status of each port on a PIC, look at the LED located on the PIC faceplate. For information about the meaning of LED states on different PICs, see the M160 Internet Router PIC Guide.

To check the status of a PIC, issue the following CLI command. The PIC slots in the FPC are numbered from 0 through 3, top to bottom:

user@host>	show chassis			fpc pic-status
Slot 0 Online
PIC 0	4x	OC-3	SONET, MM
PIC 1	1x	CSTM1, SMIR
PIC 3	2x	OC-3	ATM,	MM
Slot 1 Online
PIC 0	1x	OC-12 SONET, MM
PIC 1	1x	OC-12 ATM, MM
PIC 2	2x	OC-3	ATM,	MM
PIC 3	2x	OC-3	ATM,	MM

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

Protocols, Class of Service, and System Basics Command Reference.

Troubleshooting the Power System

The following LED states indicate that a power supply is functioning correctly:

On the enhanced power supply, the green LED labeled CB ONand blue LED labeled OUTPUT OK are lit and the amber LED labeled CB OFF is not lit.

On the enhanced power supply, the green LED labeled CB ONand blue LED labeled OUTPUT OK are lit, and the amber LEDs labeled CB OFF and NO AIRFLOW are not lit.

If any other LED states apply, consult the following sections:

All LEDs on Both Supplies Are Off on page 215

All LEDs on One Supply Are Off or LED States Are not Correct on page 216

All LEDs on Both Supplies Are Off

If all LEDs are off on both power supply faceplates, either someone has switched off power to the router or the system temperature has exceeded the acceptable maximum. In the latter case, the host module shuts down both power supplies. There is no power to the router, so the alarm LEDs on the craft interface are not lit and the LCD also goes blank.

Troubleshooting the Power System 215