Table 23: Rack Requirements and Specifications for the QFX3100 Director Device
GuidelinesRack Requirement
Use a two-post rack or a four-post rack. You can mount the switch on any two-post or 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 rack must meet the strength requirements to support the weight of the chassis.
Rack type
The holes in the mounting brackets are spaced at 1 U (1.75 in. or 4.45 cm), so that the QFX3100 Director
device can be mounted in any rack that provides holes spaced at that distance.
Mounting bracket
hole spacing
•
Ensure that the rack complies with one of these standards:
•
A 19-in. rack as defined in Cabinets, Racks, Panels, and Associated Equipment (document number
EIA-310-D) published by the Electronics Industry Association.
•
A 600-mm rack as defined in the four-part Equipment Engineering (EE); European
telecommunications standard for equipment practice (document numbers ETS 300 119-1 through
119-4) published bythe European Telecommunications Standards Institute (http://www.etsi.org).
The horizontal spacing between the rails in a rack that complies with this standard is usually wider
than the QFX3100 Director device’s mounting brackets, which measure 19 in. (48.2 cm) from outer
edge to outer edge. Use approved wing devices to narrow the opening between the railsas required.
•
Ensure that the rack is one of the following standard lengths:
•
23.62 in. (600 mm)
•
30 in. (762 mm)
•
21.5 in. (546 mm)
•
Ensure that the rack rails are spaced widely enough to accommodate the QFX3100 Director device
chassis' external dimensions. The outer edges of the front-mounting brackets extend the width of
the chassis to 19 in. (48.2 cm).
•
The rack must be strong enough to support the weight of the QFX3100 Director device.
•
Ensure that the spacing of rails and adjacent racks allows for the proper clearance around the
QFX3100 Director device and rack.
Rack size and
strength
•
Secure the rack to the building structure.
•
If earthquakes are a possibility in your geographical area, secure the rack to the floor.
•
Secure the rack to the ceiling brackets as well as wall or floor brackets for maximum stability.
Rack connection to
building structure
One pair of mounting brackets for mounting the QFX3100 Director device on two or four
posts of a rack is supplied with each QFX3100 Director device.
Related
Documentation
Chassis Physical Specifications for a QFX3100 Director Device on page 25•
• Cabinet Requirements for a QFX3100 Director Device on page 97
• Rack-Mounting and Cabinet-Mounting Warnings on page 179
• 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
Copyright © 2012, Juniper Networks, Inc.94
QFX3000 Hardware Documentation
To Next Page
Loading...
Need help?
General
