Cabinet Requirements For A Qfx3600 Or Qfx3600-I Device - Juniper QFX5110 Series Hardware Documentation

Rack Requirements for a QFX5100 Device | 111
Mount a QFX5100 Device in a Rack or Cabinet | 279

Cabinet Requirements for a QFX3600 or QFX3600-I Device

You can mount a QFX3600 or QFX3600-I device in a cabinet that contains a four-post 19-in. rack as
defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310-D) published by
the former Electronics Industry Association.
Cabinet requirements consist of:
Cabinet size and clearance
Cabinet airflow requirements
Table 28 on page 118 provides the cabinet requirements and specifications for a QFX3600 or QFX3600-I
device.
Table 28: Cabinet Requirements for a QFX3600 or QFX3600-I Device
Cabinet
Requirement Guidelines
Cabinet size and The minimum cabinet size for accommodating a QFX3600 device is 28 in. (71.1 cm) deep.
clearance Large cabinets improve airflow and reduce the chance of overheating.
Cabinet airflow When you mount the device in a cabinet, ensure that ventilation through the cabinet is
requirements sufficient to prevent overheating.
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
exhaust.
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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