Maintaining The Mx2020 Cooling System Zones - Juniper MX2020 Hardware Manual

The green LEDs next to the fan trays 0, 1, 2, and 3 on the craft interface light steadily when the fan tray
is functioning normally for that zone.
Issue the show chassis zones command to check the status of the two cooling zones. The output is
similar to the following:
user@host> show chassis zones
ZONE 0 Status
Driving FRU
Temperature
Condition
Num Fans Missing
Num Fans Failed
Fan Duty Cycle
ZONE 1 Status
Driving FRU
Temperature
Condition
Num Fans Missing
Num Fans Failed
Fan Duty Cycle
SEE ALSO
MX2020 Cooling System Description | 45
RELATED DOCUMENTATION
MX2020 Cooling System Description | 45

Maintaining the MX2020 Cooling System Zones

Purpose
For optimum router performance, verify the status of the two cooling zones of the chassis. Both Zone 0
and Zone 1 cool the Control Board and Routing Engine (CB-RE). Zone 1 consist of ten MPCs (10 through
19) and their respective MICs, along with the top half of the CB-REs and SFBs. Zone 1 is cooled by fan
trays 2 and 3. Zone 0 consists of ten MPCs (0 through 9), and their respective MICs, along with the bottom
FPC 9
62 degrees C / 143 degrees F
WARM TEMP
0
0
30
FPC 19
64 degrees C / 147 degrees F
WARM TEMP
0
0
30
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