Cabinet Requirements - Juniper QFX5110 Series Hardware Documentation

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Table 29: Cabinet Requirements for the QFX3500 Device (continued)

Cabinet airflow

When you mount the device in a cabinet, ensure that ventilation through the cabinet is

requirements

sufficient to prevent overheating.

Cabinet Requirements

You can mount the device in a cabinet that contains a 19-in. rack.

Cabinet requirements consist of:

Cabinet size

Clearance requirements

Cabinet airflow requirements

Table 30 on page 121

provides the cabinet requirements and specifications.

Ensure that the cool air supply you provide through the cabinet adequately dissipates the

thermal output of the device (or devices).

Ensure that the cabinet allows the chassis hot exhaust air to exit the cabinet without

recirculating into the device. An open cabinet (without a top or doors) that employs hot air

exhaust extraction from the top allows the best airflow through the chassis. If the cabinet

contains a top or doors, perforations in these elements assist with removing the hot air

The device fans exhaust hot air through the rear of the chassis. Install the device in the

cabinet in a way that maximizes the open space on the fan tray side of the chassis. This

maximizes the clearance for critical airflow.

Route and dress all cables to minimize the blockage of airflow to and from the chassis.

Ensure that the spacing of rails and adjacent cabinets allows for the proper clearance around

the device and cabinet.

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