Figure 14: Airflow Through the J4300 and J6300 Chassis
The cooling system includes a fan on the rear of the Routing Engine's processor and a fan at the front of the chassis.
The airflow produced by these fans keeps router components within the acceptable temperature range (see Figure 14). The speed of the fan at the rear of the processor is adjusted automatically according to current temperature.
An additional fan is part of each power supply. This fan is not regulated by the operating system.
Figure 14: Airflow Through the J4300 and J6300 Chassis
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.