Maintaining The Mx2020 Cooling System Zones - Juniper MX2020 Hardware Manual

MX2020 3D Universal Edge Router Hardware Guide
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Maintaining the MX2020 Cooling System Zones

Purpose
Action
356
Check the LEDs on the craft interface for upper and lower fan trays. The green status
LEDs labeled and , for lower fan trays, and
0 1
when a fan tray is functioning normally.
During normal operation:
The green LEDs next to the fan trays
when the fan tray is functioning normally for that zone.
Issue the
show chassis 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
MX2020 Cooling System Description on page 53
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 ( through
10
the CB-REs and SFBs. Zone 1 is cooled by fan trays
( through ), and their respective MICs, along with the bottom half of CB-REs and SFBs.
0 9
Zone 0 is cooled by fan trays
two fan trays are at the top of the chassis.
On a regular basis:
Check the LEDs on the craft interface for upper and lower fan trays. The green status
LEDs labeled and , for lower fan trays, and
0 1
when a fan tray is functioning normally.
During normal operation:
The green LEDs next to the fan trays
when the fan tray is functioning normally for that zone.
and for the upper fan trays light steadily
2 3
, , , and on the craft interface light steadily
0 1 2 3
command to check the status of the two cooling zones.
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
) and their respective MICs, along with the top half of
19
2 and
and . Two fan trays are at the bottom of the chassis, and
0 1
and for the upper fan trays light steadily
2 3
, , , and on the craft interface light steadily
0 1 2 3
Copyright © 2015, Juniper Networks, Inc.
3 . Zone 0 consists of ten MPCs