Figure 87: Fru-To-Port Airflow Through The Qfx3500 Chassis; Figure 88: Port-To-Fru Airflow Through The Qfx3500 Chassis - Juniper QFabric QFX3000-G Hardware Documentation

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QFX3000-G QFabric System Hardware Documentation

Figure 87: FRU-to-Port Airflow Through the QFX3500 Chassis

In the QFX3500 device models that have port-to-FRU airflow, the air intake to cool the

chassis is located on the rear panel of the chassis, the side with access and uplink ports.

Air is pulled into the chassis and pulled through the fan trays and management boards.

Hot air exhausts from the front of the chassis, where the FRUs are installed. See

Figure 88 on page

Each airflow type requires specific fan trays, management boards, and power supplies,

that have fan modules oriented in the proper direction. The fan trays and management

boards are designed so that they can only be inserted into the QFX3500 device model

that supports the same airflow type. The power supplies have labels and arrows on the

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