Troubleshooting PICs

To troubleshoot the PICs:

1. Check the status of the LEDs located on the PIC faceplate. Many PICs have an LED labeled STATUS on their faceplate. Some PICs have additional LEDs, often one per port. For information about the LEDs on each PICs, see the M20 PIC Guide.
2. Issue the following CLI command to check the status of a PIC:
   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 System Basics and Services Command Reference.

   The PIC slots are numbered from 0 through 3, right to left

3. If an LED is lit indicating a problem with the PIC, issue the show chassis alarms CLI command to view a more detailed description of the alarm cause:
   user@host>show chassis alarms

   For a list of messages that can appear in the output, see Table 22.

4. If you are unable to correct the problem, replace the PIC with a spare. For instructions, see Replacing a PIC. If the LEDs light correctly on the spare, the original PIC is faulty. Return it to Juniper Networks for replacement, as described in Contacting Customer Support and Returning Hardware.

Table 22: SONET/SDH Interface Alarm Messages