Juniper QFX Series User Manual

You can use DAC cables purchased from a third party. These cables should meet the
specifications described in Table 36 on page 119 and Table 37 on page 122. Table 35 on
page 118 describes the Junos OS software releases that supports third-party DAC cables.
Prior releases do not support third-party DAC cables.
Table 35: Third-Party DAC Cable Support
Third-Party Cable SupportedPlatform
Junos OS Release 11.3R1 or laterQFX3000 QFabric system
Junos OS Release 11.3R4 or laterQFX3500 device as a standalone switch
The cables are hot-removable and hot-insertable. A cable consists of a cable assembly
that connects directly into two SFP+ modules, one at each end of the cable. The cables
use integrated duplex serial data links for bidirectional communication and are designed
for data rates up to 10 Gbps. There are two types of DAC cables:
•
Passive DAC cables have no signal amplification built into the cable assembly. Table
36 on page 119 describes the passive DAC cable specifications.
•
Active DAC cables have signal amplification and equalization built into the cable
assembly. Table 37 on page 122 describes the active DAC cable specifications.
Copyright © 2012, Juniper Networks, Inc.118
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)