Maintaining the MX2020 Routing Engines
Purpose
Each host subsystem comprises a Control Board and Routing Engine (CB-RE) functioning together.
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 MX2020 Craft Interface Description.
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. During normal operations:
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-enginecommand 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 Master
Election priority Master (default)
Temperature 36 degrees C / 96 degrees F
CPU temperature 31 degrees C / 87 degrees F
DRAM 16351 MB (16384 MB installed)
Memory utilization 7 percent
CPU utilization:
User 0 percent
Background 0 percent
Kernel 4 percent
Interrupt 1 percent
Idle 95 percent
Model RE-S-1800x4
Serial ID 9009099715
Start time 2012-12-02 23:37:00 PST
Uptime 10 hours, 16 minutes, 36 seconds
Last reboot reason Router rebooted after a normal shutdown.
Load averages: 1 minute 5 minute 15 minute
0.00 0.00 0.00
Routing Engine status:
Slot 1:
Current state Backup
Election priority Backup (default)
Temperature 28 degrees C / 82 degrees F
CPU temperature 26 degrees C / 78 degrees F
DRAM 3313
Memory utilization 22 percent
CPU utilization:
User 0 percent
Background 0 percent
Kernel 0 percent
Interrupt 0 percent
Idle 100 percent
Model RE-S-1800x4
Serial ID 9009099711
Start time 2012-11-30 15:56:39 PST
Uptime 2 days, 17 hours, 56 minutes, 36 seconds
Last reboot reason Router rebooted after a normal shutdown.
Load averages: 1 minute 5 minute 15 minute
0.00 0.00 0.00
For further description of the output from the command, see the Junos OS System Basics and Services Command Reference.