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
Guidelines
Cabinet
Requirement
The minimum cabinet size for accommodating a QFX3600 device is 28 in. (71.1 cm) deep.
Large cabinets improve airflow and reduce the chance of overheating.
Cabinet size and
clearance
When you mount the device in a cabinet, ensure that ventilation through the cabinet is
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.
Cabinet airflow
requirements
118
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