Juniper QFX Series User Manual

Related
Documentation
Field-Replaceable Units in a QFX3500 Device on page 63•
• Front Panel of a QFX3500 Device on page 65
• Access Port and Uplink Port LEDs on a QFX3500 Device on page 399
• Installing and Removing QFX3500 Device Hardware Components on page 361
Cooling System and Airflow for a QFX3500 Device
The cooling system in a QFX3500 device consists of two field-replaceable unit (FRU)
fan trays with two fan modules each (see Figure 37 on page 68) and two fan modules
on the management board FRU (see Figure 38 on page 68). In addition, the power supplies
have internal fans to cool themselves.
Figure 37: Fan Tray for a QFX3500 Device
g050011
Fan modules
EjectorLED
Figure 38: Management Board for a QFX3500 Device
g050021
Management
ports
USB
port
Console
port
Fan modules
Chassis
status LEDs
LCD display
QFX3500-48S4Q
The QFX3500 device provides FRU-side-to-port-side or port-side-to-FRU-side airflow
depending on the device model you purchase. Table 11 on page 69 lists the different
QFX3500 device models and their direction of airflow.
Copyright © 2012, Juniper Networks, Inc.68
QFX3000 Hardware Documentation

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)