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Documentation

Replacing an M7i FIC or PIC Cable on page 163•

• Troubleshooting the M7i FIC or PICs on page 205

Maintaining the M7i Power Supplies

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

Action • Check that the green OUTPUT OK LED is lit on the faceplate of both power supplies.

For more information about the LED, see “M7i Power Supply LEDs” on page 61.

• Issue the following CLI command to check the status of the power supplies. As shown

in the sample output, the value OK in the Status column indicates that the power supply

is operating normally:

user@host> show chassis environment

Class Item Status Measurement

Power Power Supply 0 OK

Power Supply 1 OK

Temp Intake OK 24 degrees C / 75 degrees F

PICs OK 27 degrees C / 80 degrees F

Power Supplies OK 27 degrees C / 80 degrees F

CFEB Intake OK 27 degrees C / 80 degrees F

CFEB Exhaust OK 33 degrees C / 91 degrees F

Routing Engine OK 26 degrees C / 78 degrees F

Fans Left Fan Tray Present

Left Tray front fan OK Spinning at normal speed

Left Tray second fan OK Spinning at normal speed

Left Tray third fan OK Spinning at normal speed

Left Tray fourth fan OK Spinning at normal speed

For further description of the output from the command, see the CLI Explorer.

• Check the red and yellow alarm LEDs on the FIC. 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 following CLI command:

user@host> show chassis alarms

For a list of possible alarm messages, see “Hardware and Interface Alarm Messages”

on page 200.

• 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.

M7i Multiservice Edge Router Hardware Guide

Juniper M7i Hardware Guide

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