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Cooling System and Airflow in an EX4000 Switch

EX4000-12MP has fanless convection cooling. EX4000-24MP and EX4000-48MP have 2 and 3 fixed inbuilt fans respectively. The airflow direction of the fans of the EX4000-24MP and EX4000-48MP switches is front-to-back.

EX4000 Switches with Front-to-Back Airflow

In EX4000 switch models with front-to-back airflow, air enters through vents on the front panel to cool the chassis. The hot air then exits through the vents on the rear panel.

Note:

The front side of a switch is the side where the ports are located. The rear side is where the fans are located.
Figure 1: Front-to-Back Airflow Through the EX4000-24MP Switch Chassis Front-to-Back Airflow Through the EX4000-24MP Switch Chassis
Figure 2: Front-to-Back Airflow Through the EX4000-48MP Switch Chassis Front-to-Back Airflow Through the EX4000-48MP Switch Chassis

How to Position the Switch

Position the switch with front-to-back airflow in such a manner that the air flow out direction of the fans is directed to the hot aisle.

Figure 3: Deployment of Switches with Front-to-Back Airflow Through the Switch Chassis Deployment of Switches with Front-to-Back Airflow Through the Switch Chassis