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Related
Documentation
Mounting a QFX3100 Director Device on Four Posts in a Rack or Cabinet on page 217
•
•
Mounting a QFX3100 Director Device on Two Posts in a Rack or Cabinet on page 215
Cabinet Requirements for a QFX3008-I Interconnect Device
You can mount a QFX3008-I Interconnect 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.
Cabinet requirements consist of:
•
Cabinet size and clearance
•
Cabinet airflow requirements
summarizes cabinet requirements and specifications for a QFX3008-I
Interconnect device.
Table 27: Cabinet Requirements and Specifications for a QFX3008-I Interconnect Device
Guidelines for the QFX3008-I Interconnect Device
Cabinet
Requirement
•
The minimum depth required to accommodate a QFX3008-I Interconnect device is 39.52 in. (100.38
cm). Large cabinets improve airflow and reduce the chance of overheating.
A U is the standard rack unit defined in
Cabinets, Racks, Panels, and Associated Equipment
(document
number EIA-310–D) published by the Electronics Industry Association.
•
With adequate cooling air and airflow clearance, you can stack two devices in a cabinet that has at
least 42 U of usable vertical space. In all cases, the rack must meet the strength requirements to support
the weight of the installed devices.
Cabinet size and
clearance
When you mount the device in a cabinet, ensure that ventilation through the cabinet is sufficient to prevent
overheating. Consider the following requirements list when planning for chassis cooling:
•
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. For an illustration of chassis airflow, see
.
•
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 rear 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 racks allows for the proper clearance around the switch
and rack as specified in
“Clearance Requirements for Airflow and Hardware Maintenance for a QFX3008-I
Interconnect Device” on page 100
.
Cabinet airflow
requirements
Related
Documentation
Rack-Mounting and Cabinet-Mounting Warnings on page 179
•
•
Rack Requirements for a QFX3008-I Interconnect Device on page 95
Copyright © 2012, Juniper Networks, Inc.
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