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Cooling System and Airflow in SRX2300 Firewalls

The cooling system in SRX2300 firewalls consists of four fan modules. In addition to the fans, an internal fan in each PSU also cools the device components.

Fan Modules

The fan modules in SRX2300 firewalls are hot-insertable and hot-removable field-replaceable units (FRUs). You can install the fan modules in the fan module slots on the rear of the device.

The following figure shows the fan module.

Figure 1: SRX2300 Fan Module
Table 1: Physical Specifications of the SRX2300 Fan Modules
Height Width Depth Weight

1.61 in. (4.1 cm)

1.61 in. (4.1 cm)

4.41 in. (11.2 cm)

0.16 lb (74 g)

The SRX2300 firewalls provide front-to-back airflow. The fan modules pull the air toward them through the front of the chassis, and exhaust it out through the back of the chassis.

Figure 2: Airflow through the SRX2300 Chassis Airflow through the SRX2300 Chassis

SRX2300 Fan Module LEDs

You can examine the LEDs next to each fan module to check the status of the fans.

Figure 3: Fan Module LEDs Fan Module LEDs
Table 2: Fan Module LEDs
LED Color LED State Description
Green On steadily The fan module is operating normally. The system has verified that the module is engaged, that the airflow is in the correct direction, and that the fan is operating correctly.
Red On steadily The system has detected an error in the fan module. Replace the module immediately. Either the fan has failed, or it is seated incorrectly. To maintain proper airflow through the chassis, leave the fan module installed in the chassis until you are ready to replace it.