Juniper QFX3000-G QFabric, Deployment Manual, Page: 150 / 652

NOTE: The QSFP+ DAC cables consist of a cable assembly terminated with
QSFP+ transceivers on either end. If you use the QSFP+ DAC cable as the
data plane connection between a QFX3600-I and QFX3600 or QFX3500
Node device, the interface is automatically configured to operate at 40 Gbps.
If you use the QSFP+ DAC cable to interconnect a QFX3600 Node device
with another device, the interface is automatically configured to operate as
four 10-Gigabit Ethernet interfaces over one cable.
You can use DAC and DAC breakout cables purchased from a third party. These cables
should meet the specifications described in
Table 39 on page 125 . Table 38 on page 124
describes the Junos OS software releases that supports third-party DAC breakout cables.
Earlier releases do not support third-party breakout cables.
Table 38: Third-Party QSFP+ DAC Cable Support
Third-Party DAC Cable Support Added Platform
Junos OS 12.2X50-D10 QFX3600 Node device in a QFX3000-M QFabric system
Junos OS 12.2X50-D20 QFX3600 device as a standalone switch
Junos OS 12.2X50-D10 QFX3500 Node device in a QFX3000-M QFabric system
Junos OS 12.2X50-D10 QFX3500 device as a standalone switch
NOTE: This topic does not describe which devices support these transceivers.
For information about which transceivers are supported on QFX Series devices,
see the following topics:
•
Interface Support for the QFX3600 Device on page 97
•
Interface Support for the QFX3500 Device on page 100
The cables are hot-removable and hot-insertable. A cable consists of a cable assembly
that connects directly into two QSFP+ 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 40 Gbps. Passive DAC cables have no signal amplification built into
the cable assembly.
Table 39 on page 125 describes the QSFP+ DAC cable specifications.
Copyright © 2015, Juniper Networks, Inc. 124
QFX3000-G QFabric System Deployment Guide