Solution To troubleshoot the T640 control boards:
1. Check the LEDs on the faceplate of each control board.
2. Check the LEDs on the craft interface.
3. Use the CLI to check for alarms.
• Standalone T640 router—Issue the show chassis alarms command to view the
alarms.
• T640 router in a routing matrix—Issue the show chassis alarms lcc lcc-number
command to view the alarms.
Related
Documentation
T640 Control Boards Description•
• T640 LCC-CB Description on page 61
• T640 LCC-CB LEDs on page 62
• T640 T Series Control Boards (T-CBs) Description on page 64
• T640 T Series Control Boards (T-CBs) LEDs on page 66
• Replacing a T640 LCC-CB on page 310
• Replacing a T640 Standard Control Board or T-CB on page 313
Troubleshooting the T640 FPCs
Problem Description:
The following LEDs indicate a problem:
• The red FAIL LED above the FPC on the craft interface is lit.
• The OK for the FPC on the craft interface is off.
Solution If the red FAIL LED above the FPC is on, look at the display on the craft interface to
check the status of the FPC and the PICs that are plugged into it.
•
• Make sure the FPC is properly seated in the midplane. Verify that each ejector handle
has been turned clockwise and is tight. Use a screwdriver to verify that the screws
inside the ejector handles are tight.
• To check the status of an FPC, use the following CLI command:
user@host> show chassis fpc
To display more detailed information, use the following option:
user@host> show chassis fpc detail
Copyright © 2017, Juniper Networks, Inc.474
T640 Core Router Hardware Guide
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