Table 90: Cabinet Requirements And Specifications For The Switch - Juniper QFabric QFX3000-G Hardware Documentation

Table 90: Cabinet Requirements and Specifications for the Switch

Cabinet
Requirement Guidelines
Cabinet size You can mount the switch 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 (
The minimum cabinet size must be able to accommodate the maximum external dimensions of the
switch.
Cabinet clearance The outer edges of the mounting brackets extend the width of the chassis to 19 in. (48.2 cm).
The minimum total clearance inside the cabinet is 30 in. (76.2 cm) between the inside of the front
door and the inside of the rear door.
Cabinet airflow When you mount the switch in a cabinet, ensure that ventilation through the cabinet is sufficient to
requirements prevent overheating.
Ensure adequate cool air supply to dissipate the thermal output of the switch or switches.
Ensure that the hot air exhaust of the chassis exits the cabinet without recirculating into the switch.
An open cabinet (without a top or doors) that employs hot air exhaust extraction from the top
ensures 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.
Install the switch in the cabinet in a way that maximizes the open space on the side of the chassis
that has the hot air exhaust.
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 is such that there is proper clearance around
the switch and cabinet.
A cabinet larger than the minimum required provides better airflow and reduces the chance of
overheating.
Related
Documentation
Clearance Requirements for Airflow and Hardware Maintenance for a QFX3100 Director
Device
Copyright © 2018, Juniper Networks, Inc.
http://www.ecianow.org/standards-practices/standards/
Clearance Requirements for Airflow and Hardware Maintenance for EX4200 Switches
on page 254
Rack Requirements for EX4200 Switches on page 237
Mounting an EX4200 Switch on Two Posts in a Rack or Cabinet
When planning the site for installing a QFX3100 Director device, you must allow sufficient
clearance around the device.
Allow at least 6 in. (15.2 cm) of clearance on the side between devices that have fans
or blowers installed. Allow 2.8 in. (7 cm) between the side of the chassis and any
non-heat-producing surface such as a wall. For the cooling system to function properly,
the airflow around the chassis must be unrestricted.
airflow through the QFX3100 Director device.
If you are mounting a QFX3100 Director device in a rack or cabinet with other equipment,
or if you are placing it on the desktop or floor near other equipment, ensure that the
exhaust from other equipment does not blow into the intake vents of the chassis.
Chapter 10: Rack and Cabinet Requirements
).
Figure 129 on page 246 shows the
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