Juniper MX2020 Hardware Manual page 505

To maintain the host subsystem, check the LEDs (RE0 and RE1) on the craft interface. For more information
about the LEDs and the display, see
NOTE: Even though the Routing Engine is combined with a Control Board (CB-RE), separate
LEDs on the craft interface show the status of the routing engines, and separate LEDs show the
status of the Control Board.
For optimum router performance, verify the condition of the Routing Engines and the CB-REs.
Action
On a regular basis:
Check the host subsystem LEDs on the craft interface. For more information about the LEDs, and the
display, see "MX2020 Craft Interface Description" on page
NOTE: Even though the Routing Engine is combined with a Control Board (CB-RE), separate
LEDs on the craft interface show the status of the routing engines, and separate LEDs show
the status of the Control Board.
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 Routing Engine portion of the CB-RE faceplate. During normal operations, the
ONLINE LED is lit steadily green.
Issue the show chassis routing-engine command to check the status of the Routing Engines. The output
is similar to the following:
user@host> show chassis routing-engine
Routing Engine status:
Slot 0:
Current state
Election priority
Temperature
CPU temperature
DRAM
Memory utilization
CPU utilization:
"MX2020 Craft Interface Description" on page
Master
Master (default)
36 degrees C / 96 degrees F
31 degrees C / 87 degrees F
16351 MB (16384 MB installed)
7 percent
31.
31. During normal operations:
486