Juniper QFX Series User Manual

The HDD modules in the two QFX3100 Director devices operate in a redundant array of
independent disks (RAID) system to synchronize directories or files across the two Director
devices in a QFX3100 Director group. The QFX3100 Director devices are connected
together through two ports on each Director device.
QFX3100 Director Device Component Redundancy
The following hardware components provide redundancy on a QFX3100 Director device:
•
Power supplies—There are two power supplies in a QFX3100 Director device. Each
power supply provides power to all components in the device. The two power supplies
provide full power redundancy to the device. If one power supply fails or is removed,
the second power supply balances the electrical load without interruption.
•
Cooling system—There are three fan modules in a QFX3100 Director device. If a fan
module fails and is unable to keep the QFX3100 Director device within the desired
temperature limits, chassis alarms are triggered and the QFX3100 Director device may
shut down.
•
Hard disk drive (HDD) modules—There are two HDD modules in a QFX3100 Director
device. The HDD modules are fully redundant storage units; each time a directory or
file is stored on one HDD module, the same directory or file is stored on the other HDD
module.
Related
Documentation
AC Power Supply in a QFX3100 Director Device on page 30•
• Cooling System and Airflow in a QFX3100 Director Device on page 27
• HDD Modules in a QFX3100 Director Device on page 29
Chassis Physical Specifications for a QFX3100 Director Device
The QFX3100 Director device provides Routing Engine functionality for the QFX3000
QFabric system. Table 5 on page 25 summarizes the physical specifications of the
QFX3100 Director device.
Table 5: Physical Specifications of the QFX3100 Director Device
ValueDescription
3.5 in. (8.9 cm)Height
17.26 in. (43.7 cm)Chassis width
23.5 in. (59.7 cm)Chassis depth
Chassis with FRUs installed: 41.2 lb (18.7 kg)Weight
Related
Documentation
Cabinet Requirements for a QFX3100 Director Device on page 97•
• Mounting a QFX3100 Director Device on Two Posts in a Rack or Cabinet on page 215
25Copyright © 2012, Juniper Networks, Inc.
Chapter 2: QFX3100 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)