Cabinet Requirements for a QFX3500 Device
You can mount the QFX3500 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 Electronics Industry Association.
Cabinet requirements consist of:
- Cabinet size and clearance
- Cabinet airflow requirements
Table 1 provides the
cabinet requirements and specifications for the QFX3500 device.
Table 1: Cabinet Requirements
for the QFX3500 Device
Cabinet Requirement | Guidelines |
|---|
Cabinet size and clearance | The minimum cabinet size for accommodating a QFX3500
device is 36 in. (91.4 cm) deep. Large cabinets improve
airflow and reduce the chance of overheating. |
Cabinet airflow requirements | 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.
|
Published: 2012-03-23
