system devices as a single network entity, which enables simplified management of your
data center using the Junos OS command-line interface (CLI).
In a QFX Virtual Chassis, the QFX3500 device can participate with other QFX3500 devices
and QFX3600 devices in a ring topology with up to 10 members.
In a QFX5100 Virtual Chassis Fabric, the QFX3500 device can participate as a leaf device.
Up to a total of 20 devices can participate in the QFX5100 Virtual Chassis Fabric.
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Software on page 4
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Hardware on page 4
Software
QFX Series devices use the Junos operating system (OS), which provides Layer 2 and
Layer 3 switching, routing, and security services. Junos OS is installed on the QFX3500
device’s 8-gigabyte (GB) internal flash drive. The same Junos OS code base that runs
on QFX3500 devices also runs on all Juniper Networks EX Series switches, and J Series,
M Series, MX Series, and T Series routers.
For more information about which features are supported on QFX Series devices, see
Feature Explorer.
When the QFX3500 device is operating as a standalone switch, you manage the switch
using the Junos OS command-line interface (CLI), accessible through the console and
out-of-band management ports on the device.
When a QFX Series device operates as part of a QFabric system, all the devices in the
data center fabric are managed through the Administrator software installed on the
QFX3100 Director devices. Each device in a QFabric system is interconnected in a single
control plane and management network, using the redundant management ports on
each device.
Hardware
The compact QFX3500 device is 1 rack unit (1 U) in size and designed to fit in
industry-standard 19-inch rack-mount enclosures. See Figure 1 on page 5 and
Figure 2 on page 5 and “Chassis Physical Specifications for a QFX3500 Chassis” on
page 17.
NOTE: The standard mounting configuration for the QFX3500 device uses
a two rail mounting system. The QFX3500-RB-ACRB device model uses a
four rail mounting system for installations that need to recess the switch or
need to mount the port (rear) end of the switch forward.
Copyright © 2017, Juniper Networks, Inc.4
QFX3500 Device Hardware Documentation
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