Table 81: Rack Requirements For The Qfx3500 Device - Juniper QFabric QFX3000-G Hardware Documentation

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Rack Requirements for a QFX3500 Device

Table 81: Rack Requirements for the QFX3500 Device

Rack Requirement
Rack type
Mounting bracket hole
spacing
Rack size and strength
Copyright © 2018, Juniper Networks, Inc.
Chassis Physical Specifications for QFX3600 and QFX3600-I Devices on page 103
Rack-Mounting and Cabinet-Mounting Warnings on page 343
Clearance Requirements for Airflow and Hardware Maintenance for a QFX3600 or
QFX3600-I Device on page 249
Mounting a QFX3600 or QFX3600-I Device on Four Posts in a Rack or Cabinet on
page 458
Mounting a QFX3600 or QFX3600-I Device on Two Posts in a Rack or Cabinet on
page 455
A QFX3500 device is designed to be installed on four-post racks.
Rack requirements consist of:
Rack type
Mounting bracket hole spacing
Rack size and strength
Rack connection to the building structure
Table 81 on page 235 provides the rack requirements and specifications for the QFX3500
device.
Guidelines
Use a four-post rack. You can mount the device on a four-post rack that provides bracket holes or
hole patterns spaced at 1 U (1.75 in. or 4.45 cm) increments and that meets the size and strength
requirements to support the weight.
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.
The holes in the mounting brackets are spaced at 1 U (1.75 in. or 4.45 cm), so that the device can
be mounted in any rack that provides holes spaced at that distance.
Ensure that the rack complies with the standards for a 19-in. rack as defined in Cabinets, Racks,
Panels, and Associated Equipment (document number EIA-310–D) published by the Electronics
Industry Association.
Ensure that the rack rails are spaced widely enough to accommodate the device chassis' external
dimensions. The outer edges of the front-mounting brackets extend the width to 19 in. (48.26 cm).
The front and rear rack rails must be spaced between 28 in. (71.1 cm) and 36 in. (91.4 cm)
front-to-back.
The rack must be strong enough to support the weight of the device.
Ensure that the spacing of rails and adjacent racks allows for proper clearance around the device
and rack.
Chapter 10: Rack and Cabinet Requirements
235