Maintaining The M120 Host Subsystem - Juniper Networks Hardware Manual

M120 Multiservice Edge Router Hardware Guide
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Maintaining the M120 Host Subsystem

Purpose
Action
104
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Rear Top Tray Fan 7
Rear Top Tray Fan 8
Rear Bottom Tray Fan 1 OK
Rear Bottom Tray Fan 2 OK
Rear Bottom Tray Fan 3 OK
Rear Bottom Tray Fan 4 OK
Rear Bottom Tray Fan 5 OK
Rear Bottom Tray Fan 6 OK
Rear Bottom Tray Fan 7 OK
Rear Bottom Tray Fan 8 OK
NOTE: The fan numbers are stamped into the fan tray sheet metal next to
each fan.
M120 Cooling System Description on page 32
Replacing an M120 Fan Tray on page 134
Troubleshooting the M120 Cooling System on page 120
For optimum router performance, verify the condition of the host subsystem. The host
subsystem comprises a Routing Engine installed directly into a CB.
On a regular basis:
Check the LEDs on the craft interface to view information about the status of the
Routing Engines. For more information about the LEDs and the display, see "M120 Craft
Interface Description" on page 23.
Check the LEDs on the CB faceplate to see information about them.
Check the LEDs on the Routing Engine faceplate to see information about them.
To check the status of the Routing Engines, issue the
command. The output is similar to the following:
user@host> show chassis routing-engine routing engine status
Routing Engine status:
Slot 0:
Current state
Election priority
Temperature
CPU temperature
DRAM
Memory utilization
CPU utilization:
User
Background
Kernel
Interrupt
OK Spinning at high speed
OK Spinning at high speed
Spinning at high speed
Spinning at high speed
Spinning at high speed
Spinning at high speed
Spinning at high speed
Spinning at high speed
Spinning at high speed
Spinning at high speed
show chassis routing-engine
Master
Master (default)
56 degrees C / 132 degrees F
63 degrees C / 145 degrees F
3584 MB
12 percent
0 percent
0 percent
6 percent
0 percent
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