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CiscoASR 9000 Series Aggregation Services Router Hardware Installation Guide
Chapter4 Troubleshooting the Installation
Troubleshooting the Cooling Subsystem
Table4-8 Chassis Cooling Requirements for Next Generation Line Cards
Fan Tray Operation
The fan trays maintain acceptable operating temperatures for the internal components by drawing
cooling air through a replaceable air filter into the switch fabric and alarm card cage and then through
the line card and RSP card cage.
•See Figure 1-12 for the Cisco ASR 9010Router cooling path, Figure 1-13 for the
Cisco ASR 9006 Router cooling path, and Figure 1-14 for the Cisco ASR 9904 Router cooling path.
•In the Cisco ASR 9922 Router, the fan trays draw cooling air from the front of the chassis into the
middle card cage and then through each of the two line card cages top and bottom (Figure1-15).
The fan tray receives power from the chassis backplane through a wiring harness.
•In the Cisco ASR 9912 Router, the rear-insertion fan trays draw cooling air from the front of the
chassis into the card cage and then up through the chassis to exit out the rear (Figure1-16).
The fan tray contains 12 fans (CiscoASR 9010 Router, Cisco ASR 9904 Router,
Cisco ASR 9922 Router, and CiscoASR 9912 Router) or six fans (Cisco ASR 9006 Router), a
controller card, and one front panel status LED indicator:
•Green—Fan tray is functioning properly.
•Red—There is a fault detected in the fan tray.
If the air temperature inside the chassis rises, blower speed increases to provide additional cooling air to
the internal components. If the internal air temperature continues to rise beyond the specified threshold,
the system environmental monitor shuts down all internal power to prevent equipment damage because
of excessive heat.
If the system detects that one or more of the fans in the fan tray has failed, it displays a warning message
on the system console. In addition, the remaining fans go to full speed to compensate for the loss of the
failed fan.
Chassis Type and Fan Tray 4x100GE 8x100GE
Mod200 (1xNPU)
Low density EP 20x10GE
Mod200
(1xNPU),
2x100GE EP
Cisco ASR 9922, V2 fan tray -5 to 50°C
0 to 1800 m
-5 to 50 °C
0 to 1800 m
-5 to 50°C
0 to 1800 m
-5 to 50°C
0 to 1800 m
-5 to 50°C
0 to 1800 m
Cisco ASR 9912, V1 fan tray -5 to 50°C
0 to 1800 m
-5 to 50°C
0 to 1800 m
-5 to 50°C
0 to 1800 m
-5 to 50°C
0 to 1800 m
-5 to 50°C
0 to 1800 m
Cisco ASR 9910, V2 fan tray, low
power optics (less than 1.5W)
-5 to 50°C
0 to 1800 m
-5 to 50°C
0 to 1800 m
-5 to 50°C
0 to 1800 m
-5 to 50°C
0 to 1800 m
-5 to 50°C
0 to 1800 m
Cisco ASR 9910, V2 fan tray, high
power optics (greater than 1.5W)
-5 to 50°C
0 to 1800 m
-5 to 50°C
0 to 1800 m
-5 to 50°C
0 to 1800 m
-5 to 45°C (SFP+)
0 to 1800 m
-5 to 50°C
0 to 1800 m
Cisco ASR 9006 with baffle, V2
fan tray
-5 to 40°C
0 to 3000 m
-5 to 40°C
0 to 3000 m
-5 to 50°C
0 to 1800 m
-5 to 45°C (SFP+)
0 to 1800 m
-5 to 50°C
0 to 1800 m
Cisco ASR 9904 with baffle, V1
fan tray
-5 to 50°C
0 to 1800 m
-5 to 50°C
0 to 1800 m
-5 to 50°C
0 to 1800 m
-5 to 50°C
0 to 1800 m
-5 to 50°C
0 to 1800 m