Maintaining the MX2020 Control Boards
Purpose
For optimum router performance, verify the condition of the Control Board and Routing Engine (CB-RE).
Action
On a regular basis:
Check the host subsystem LEDs on the craft interface. For more information about the LEDs and the display, see MX2000 Switch Fabric Board LED.
During normal operations:
The green host subsystem ONLINE LED on the craft interface is lit.
The red host subsystem OFFLINE LED on the craft interface is not lit.
Check the LEDs on the control board portion of the CB-RE faceplate.
During normal operations:
The green OK LED on the CB-RE faceplate is lit.
The red FAIL LED on the CB-RE faceplate is not lit.
Issue the
show chassis environment cbcommand to check the status of the CB-REs. The output is similar to the following:user@host> show chassis environment cb CB 0 status: State Online Master IntakeA-Zone0 Temperature 25 degrees C / 77 degrees F IntakeB-Zone1 Temperature 29 degrees C / 84 degrees F IntakeC-Zone0 Temperature 28 degrees C / 82 degrees F ExhaustA-Zone0 Temperature 26 degrees C / 78 degrees F ExhaustB-Zone1 Temperature 28 degrees C / 82 degrees F TCBC-Zone0 Temperature 32 degrees C / 89 degrees F Power 1 1.0 V 1008 mV 1.2 V 1208 mV 1.8 V 1801 mV 2.5 V 2526 mV 3.3 V 3312 mV 5.0 V 5020 mV 5.0 V RE 4995 mV 12.0 V 12123 mV 12.0 V RE 12007 mV Bus Revision 100 FPGA Revision 271 CB 1 status: State Online Standby IntakeA-Zone0 Temperature 30 degrees C / 86 degrees F IntakeB-Zone1 Temperature 25 degrees C / 77 degrees F IntakeC-Zone0 Temperature 39 degrees C / 102 degrees F ExhaustA-Zone0 Temperature 33 degrees C / 91 degrees F ExhaustB-Zone1 Temperature 28 degrees C / 82 degrees F TCBC-Zone0 Temperature 31 degrees C / 87 degrees F Power 1 1.0 V 1015 mV 1.2 V 1211 mV 1.8 V 1814 mV 2.5 V 2545 mV 3.3 V 3345 mV 5.0 V 5066 mV 5.0 V RE 5020 mV 12.0 V 12104 mV 12.0 V RE 12046 mV Bus Revision 100 FPGA Revision 0
For further description of the output from the command, see the Junos OS System Basics and Services Command Reference.