Cisco Systems 9000 Manual De Usuario

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 

 for the Cisco ASR 9010 Router cooling path, 

 for the 

Cisco ASR 9006 Router cooling path, and 

 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 (

). 

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 (

The fan tray contains 12 fans (Cisco ASR 9010 Router, Cisco ASR 9904 Router, 
Cisco ASR 9922 Router, and Cisco ASR 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.

Mod200 (1xNPU) 
Low density EP 

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