Table 85: Cabinet Requirements And Specifications For A Qfx3008-I Interconnect - Juniper QFabric QFX3000-G Hardware Documentation

QFX3000-G QFabric System Hardware Documentation
Table 85: Cabinet Requirements and Specifications for a QFX3008-I Interconnect Device
Cabinet
Requirement Guidelines for the QFX3008-I Interconnect Device
Cabinet size and The minimum depth required to accommodate a QFX3008-I Interconnect device is 39.52 in. (100.38
clearance 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 airflow When you mount the device in a cabinet, ensure that ventilation through the cabinet is sufficient to prevent
requirements 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
"Clearance Requirements for Airflow and Hardware Maintenance for a QFX3008-I Interconnect Device"
on page
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
Interconnect Device" on page
Related
Documentation
Cabinet Requirements for a QFX5100 Device
240
Cabinet requirements consist of:
Cabinet size and clearance
Cabinet airflow requirements
Table 85 on page 240 summarizes cabinet requirements and specifications for a QFX3008-I
Interconnect device.
246.
"Clearance Requirements for Airflow and Hardware Maintenance for a QFX3008-I
246.
Rack-Mounting and Cabinet-Mounting Warnings on page 343
Rack Requirements for a QFX3008-I Interconnect Device on page 231
Chassis Physical Specifications for a QFX3008-I Interconnect Device on page 45
You can mount the QFX5100 device in an enclosure or cabinet that contains a four-post
19-in. open 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:
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