Cooling System and Airflow in an EX2200 Switch
The cooling system in an EX2200 switch consists of two fans along the rear of the chassis that provide side-to-rear chassis cooling. In switch models with network ports in which PoE is available, there is an additional fan in the power supply.
Figure 1 shows the airflow in an EX2200 switch with network ports in which PoE is available.
Figure 1: Airflow Through PoE Models of EX2200 Switches
Figure 2 shows the airflow in an EX2200 switch with network ports in which PoE is not available.
Figure 2: Airflow Through Non-PoE Models of EX2200 Switches
Under normal operating conditions, the fans operate at reduced speed to reduce noise. Temperature sensors in the chassis monitor the temperature within the chassis. If any fan fails or if the temperature inside the chassis rises above the threshold, the switch raises an alarm and all functioning fans operate at a higher speed than normal. If the temperature inside the chassis rises above the threshold, the switch shuts down automatically.
