Maintaining the M320 Host Subsystem
Purpose
For optimum router performance, verify the condition of the host subsystem. The host subsystem comprises a Routing Engine and up to two adjacent CBs functioning together.
Action
On a regular basis:
Check the host subsystem LEDs (RE0 and RE1) on the craft interface. If the red RE0 or RE1 LED is lit, look at the LED display to get more information about the cause of the problem. For more information about the LEDs and the display, see M320 Craft Interface Description.
Check the LED display on the craft interface to view information about the router temperature and the status of the Routing Engines.
Check the LEDs on the CB faceplate to see information about the CB.
To check the status of the Routing Engines, issue the show chassis routing-engine command. The output is similar to the following:
user@host> show chassis routing-engineRouting Engine status: Slot 0: Current state Backup Election priority Master (default) Temperature 50 degrees C / 122 degrees F DRAM 2048 MB Memory utilization 10 percent CPU utilization: User 25 percent Background 0 percent Kernel 38 percent Interrupt 4 percent Idle 33 percent Model RE-4.0 Serial ID 212058900125 Start time 2003-09-30 16:34:15 PDT Uptime 18 hours, 57 minutes, 9 seconds Routing Engine status: Slot 1: Current state Master Election priority Backup (default) Temperature 29 degrees C / 84 degrees F DRAM 2048 MB Memory utilization 11 percent CPU utilization: User 0 percent Background 0 percent Kernel 1 percent Interrupt 0 percent Idle 99 percent Model RE-4.0 Serial ID 212047100107 Start time 2003-09-30 13:04:27 PDT Uptime 22 hours, 27 minutes, 8 seconds Load averages: 1 minute 5 minute 15 minute 0.01 0.01 0.00To check the status of the CBs, issue the show chassis environment cb command. The output is similar to the following:
user@host> show chassis environment cbCB 0 status: State Online Standby Temperature 33 degrees C / 91 degrees F Power: 1.8 V 1816 mV 2.5 V 2477 mV 3.3 V 3278 mV 4.6 V 4615 mV 5.0 V 5023 mV 12.0 V 11511 mV 3.3 V bias 3286 mV 8.0 V bias 7257 mV BUS Revision 16 FPGA Revision 39 CB 1 status: State Online Master Temperature 28 degrees C / 82 degrees F Power: 1.8 V 1809 mV 2.5 V 2471 mV 3.3 V 3304 mV 4.6 V 4610 mV 5.0 V 5003 mV 12.0 V 11555 mV 3.3 V bias 3301 mV 8.0 V bias 7413 mV BUS Revision 12 FPGA Revision 15
For more information about using the CLI, see the Junos OS manuals.