Juniper QFX3500 - Cabinet Requirements for a QFX3500 Device; Table 22: Cabinet Requirements for the QFX3500 Device

Related
Documentation
Chassis Physical Specifications for a QFX3500 Chassis on page 17•
• Rack-Mounting and Cabinet-Mounting Warnings on page 180
• Clearance Requirements for Airflow and Hardware Maintenance for a QFX3500 Device
on page 53
• Mounting a QFX3500 Device in a Rack or Cabinet on page 77
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 22 on page 52 provides the cabinet requirements and specifications for the
QFX3500 device.
Table 22: Cabinet Requirements for the QFX3500 Device
GuidelinesCabinet Requirement
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 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
Related
Documentation
Clearance Requirements for Airflow and Hardware Maintenance for a QFX3500 Device
on page 53
•
• Rack Requirements for a QFX3500 Device on page 51
• Mounting a QFX3500 Device in a Rack or Cabinet on page 77
Copyright © 2017, Juniper Networks, Inc.52
QFX3500 Device Hardware Documentation