Figure 9: Airflow Through the J4350 and J6350 Chassis
The cooling system includes three fans at the rear of the chassis. The airflow produced by these fans keeps router components within the acceptable temperature range (see Figure 9). The speed of the fans is adjusted automatically according to current temperature.
An air filter protects the air intake opening at the front of the chassis and must be replaced periodically. For instructions, see Replacing an Air Filter.
The Routing Engine monitors the temperature of the router components. If the ambient maximum temperature specification is exceeded and the router cannot be adequately cooled, the Routing Engine shuts down the hardware components.
An additional fan is part of each power supply. This fan is not regulated by the operating system.
Figure 9: Airflow Through the J4350 and J6350 Chassis