User Manual

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Ta ble o f C o n t e n t s
ix
Replace the Routing Engine ................................................................................176
Remove the Routing Engine ........................................................................177
Install the Routing Engine............................................................................178
Replace the LS-120 Drive....................................................................................180
Chapter 14
Maintain and Replace Cables and Connectors.................................181
Tools and Parts Required....................................................................................181
Cable Specifications............................................................................................182
Maintain PIC Cables............................................................................................182
Replace PIC Cables .............................................................................................183
Remove a PIC Cable ....................................................................................183
Install a PIC Cable........................................................................................184
Replace Power Supply Cables .............................................................................185
Replace Cables and Wire Connecting to Routing Engine Interface Ports .............186
Replace the Management Ethernet Cable ....................................................186
Replace the Console or Auxiliary Cable........................................................187
Replace Alarm Relay Wire ...........................................................................188
Part 4
Troubleshooting
Chapter 15
Troubleshooting Overview..............................................................................191
Command-Line Interface ....................................................................................191
LEDs ...................................................................................................................192
LEDs on the Craft Interface..........................................................................192
LEDs on Hardware Components..................................................................192
Hardware and Interface Alarm Messages............................................................192
Juniper Networks Technical Assistance Center....................................................194
Chapter 16
Troubleshoot the Power Supplies.............................................................195
All LEDs on Both Supplies are Off .......................................................................195
All LEDs on One Supply are Off or LED States are not Correct............................195
Chapter 17
Troubleshoot the Cooling System.............................................................197
Troubleshoot the Fan Tray and Impeller Assemblies...........................................198
Troubleshoot the Power Supply Fans..................................................................199