Juniper QFX Series User Manual

Figure 31: QFX3500 Device Rear
g050001
QSFP+
uplink
ports
SFP+
access
ports
SFP+
access
ports
The QFX3500device hasan LCD panel that displays the device hostname and the number
of active alarms. See “Front Panel of a QFX3500 Device” on page 65. The rear panel has
48 10-Gbps access ports and 4 40-Gbps uplink ports. See “Rear Panel of a QFX3500
Device” on page 66.
SFP+ Access Ports
The QFX3500 device has 48 access ports (0 through 47) that support small form-factor
pluggable plus (SFP+) and small form-factor pluggable (SFP) transceivers, as well as
SFP+ direct attach copper cables, also known as Twinax cables. See “Interface
Specifications for SFP+ Transceivers for QFX3500 Device Access Ports” on page 108 and
“Interface Specifications for SFP+ DAC Cables for QFX3500 Device Access Ports” on
page 117.
•
Up to 48 of the access ports can be used for SFP+ transceivers or SFP+ direct attach
copper cables. You can use 10-Gigabit Ethernet SFP+ transceivers and SFP+ direct
attach copper cables in any access port. You can use 2-Gbps, 4-Gbps, or 8-Gbps
Fibre Channel SFP+ transceivers in ports 0 through 5 and ports 42 through 47.
NOTE: If you use Fibre Channel SFP+ transceivers in ports 0 through 5 or
ports 42 through 47, you must configure the entire block of ports as
Fibre Channel ports. For example, if you use a Fibre Channel SFP+
transceiver in any of the ports 0 through 5, then ports 0 through 5 must be
configured as Fibre Channel ports. If you use a Fibre Channel SFP+
transceiver in any of the ports 42 through 47, then ports 42 through 47 must
be configured as Fibre Channel ports. You then cannot use
10-Gigabit Ethernet SFP+ transceivers in these ports.
•
Up to 36 of the access ports can be used for SFP transceivers. Gigabit Ethernet SFP
transceivers can be used in ports 6 through 41.
CAUTION: Do not place a copper transceiver in an access port directly
above or below another copper transceiver. Internal damage to the access
ports and device can occur. Because of this limitation, a maximum of 18
copper transceivers can be installed in ports 6 through 41. We recommend
using only the top row of access ports for copper transceivers.
61Copyright © 2012, Juniper Networks, Inc.
Chapter 4: QFX3500 Overview

Juniper QFX Series Specifications

General

Category	Switch
Series	QFX
Form Factor	1U, 2U, and modular chassis options
Power Supply	Redundant, hot-swappable power supplies
Cooling	hot-swappable fans
Virtual Chassis	Supported on certain models
Typical Use	Data center, cloud
Operating System	Junos OS
Management	CLI
Key Features	High performance, low latency, automation
Latency	Sub-microsecond latency
Port Density	Varies by model (e.g., QFX5100: up to 48x10GbE + 6x40GbE)