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Cabinet Requirements for a QFX3100 Director Device


You can mount the QFX3100 Director device in a cabinet that contains a 19-in. rack.

Cabinet requirements consist of:

  • Cabinet size

  • Clearance requirements

  • Cabinet airflow requirements

Table 1 provides the cabinet requirements and specifications for the QFX3100 Director device.

Table 1: Cabinet Requirements and Specifications for the QFX3100 Director Device

Cabinet Requirement


Cabinet size

  • You can mount the QFX3100 Director device in a cabinet that contains a 19-in. rack as defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310-D) published by the Electronics Industry Association.

    Note: The rack must meet the strength requirements to support the weight of the QFX3100 Director device.

  • The minimum cabinet size must be able to accommodate the maximum external dimensions of the QFX3100 Director device.

Cabinet clearance

  • The outer edges of the mounting brackets extend the width of the chassis to 19 in. (48.3 cm).

  • The minimum total clearance inside the cabinet is 29.2 in. (74.17 cm) between the inside of the front door and the inside of the rear door.

Cabinet airflow requirements

When you mount the QFX3100 Director device in a cabinet, ensure that ventilation through the cabinet is sufficient to prevent overheating.

  • Ensure adequate cool air supply to dissipate the thermal output of the QFX3100 Director device or devices.

  • Ensure that the cabinet allows the chassis hot exhaust air to exit the cabinet without recirculating into the QFX3100 Director 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 exhaust.

  • Install the QFX3100 Director device in the cabinet in a way that maximizes the open space on the side of the chassis that has the hot air exhaust. 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 QFX3100 Director device and cabinet.

  • A cabinet larger than the minimum required provides better airflow and reduces the chance of overheating.