Maintaining the MX2020 Cooling System Zones
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
their respective MICs, along with the top half of the CB-REs and SFBs.
Zone 1 is cooled by fan trays
3. Zone 0 consists of ten MPCs (
9), and their respective MICs, along
with the bottom half of CB-REs and SFBs. Zone 0 is cooled by fan trays
1. Two fan trays are at the
bottom of the chassis, and 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
1, for lower fan trays, and
3 for the upper fan trays light steadily when a fan tray
is functioning normally.
During normal operation:
The green LEDs next to the fan trays
3on 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 FPC 9 Temperature 62 degrees C / 143 degrees F Condition WARM TEMP Num Fans Missing 0 Num Fans Failed 0 Fan Duty Cycle 30 ZONE 1 Status Driving FRU FPC 19 Temperature 64 degrees C / 147 degrees F Condition WARM TEMP Num Fans Missing 0 Num Fans Failed 0 Fan Duty Cycle 30