Juniper QFX3500 - Chapter 1 System Overview; System Overview; QFX3500 Device Overview

CHAPTER 1
System Overview
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QFX3500 Device Overview on page 3
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Understanding Redundancy of QFX3500 Device Components and
Functionality on page 7
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Understanding QFX Series Virtual Chassis on page 8
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Understanding QFX Series Virtual Chassis Components on page 11
QFX3500 Device Overview
The Juniper Networks QFX3500 device is a high-speed, multipurpose switch especially
designed for next-generation data centers. The QFX3500 can be configured as a
standalone switch, a Node device in a QFabric system, or as a member of a QFX Virtual
Chassis.
Forty-eight 10-Gbps access ports in the device use small form-factor pluggable plus
(SFP+) transceivers and operate by default as 10-Gigabit Ethernet interfaces. Optionally,
you can choose to configure up to 12 of the ports as 2-Gbps, 4-Gbps, or 8-Gbps
Fibre Channel (FC) interfaces, and up to 36 of the ports as 1-Gigabit Ethernet interfaces.
When used as a standalone switch, four 40-Gbps uplink ports in the device use quad
small form-factor pluggable plus (QSFP+) to four SFP+ copper breakout cables to
support an additional 15 10-Gigabit Ethernet interfaces.
QFX3500 devices can function as a Fibre Channel over Ethernet (FCoE)-FC gateway or
as an FCoE transit switch. FCoE is a method of supporting converged FC and Ethernet
traffic on a data center bridging (DCB) network by encapsulating unmodified FC frames
in Ethernet to transport the FC frames over the physical Ethernet network.
In a QFabric system, a QFX3500 device functions as a Node device, connected to a
QFabric system through 40-Gbps uplink ports to a Juniper Networks QFX3008-I or
QFX3600-I Interconnect device. Together, the QFX3500 Node devices and QFX3008-I
or QFX3600-I Interconnect devices form a multistage, nonblocking switch fabric that
provides a high-performance, low-latency, unified interconnect solution for
next-generation data centers.
TheQFX3500Node devicesand Interconnect devices areconnectedtoJuniper Networks
QFX3100 Director devices in an out-of-band management network through Juniper
Networks EX4200 Ethernet Switches.TheQFX3100 Director devices present the QFabric
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