Qfx10002 Network Cable And Transceiver Planning; Determining Transceiver Support For The Qfx10002 - Juniper QFX10002 Hardware Manual

Table 33: Cabinet Requirements for the QFX10002 (continued)
Cabinet Requirement
Cabinet airflow requirements
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Documentation

QFX10002 Network Cable and Transceiver Planning

Determining Transceiver Support for the QFX10002

Copyright © 2019, Juniper Networks, Inc.
Guidelines
When you mount the switch in a cabinet, ensure that ventilation through the cabinet
is sufficient to prevent overheating.
Ensure that the cool air supply you provide through the cabinet adequately
dissipates the thermal output of the switch (or switches).
Ensure that the cabinet allows the chassis hot exhaust air to exit the cabinet
without recirculating into the switch. An open cabinet (without a top or doors)
that employs hot air exhaust extraction from the top allows the best airflow
through the chassis. If the cabinet contains a top or doors, perforations in these
elements assist with removing the hot air exhaust.
Install the switch in the cabinet in a way that maximizes the open space on the
FRU side of the chassis. This maximizes the clearance for critical airflow. The
QFX10002 fans exhaust hot air through the fans and power supplies.
Route and dress all cables to minimize the blockage of airflow to and from the
chassis.
Ensure that the spacing of rails and adjacent cabinets allows for the proper
clearance around the switch and cabinet.
Overview of Installing the QFX10002 on page 89
Installing and Removing QFX10002 Hardware Components on page 109
Mounting a QFX10002 in a Rack on page 92
Before installing the QFX10002, review the following topics to understand the optical
and interface requirements for the system.
Determining Transceiver Support for the QFX10002 on page 73
Cable Specifications for QSFP+ and QSFP28 Transceivers on page 74
Understanding QFX Series Fiber-Optic Cable Signal Loss, Attenuation, and
Dispersion on page 76
Calculating Power Budget and Power Margin for Fiber-Optic Cables on page 77
The QFX10002 has quad small form-factor pluggable plus (QSFP+) ports for use as
uplinks, downlinks, or as access ports. These 40-Gigabit Ethernet ports support QSFP+
transceivers, QSFP28 transceivers, QSFP+ direct-attach copper (DAC) cables, and DAC
breakout cables (DACBO). Each QSFP+ port on either a QFX10002-72Q or a
QFX10002-36Q can be configured to operate as a 10-Gigabit Ethernet interface by using
a breakout cable or as a single 40-Gigabit Ethernet interface.
The QFX10002 also supports using small form-factor pluggable (SFP) and small
form-factor pluggable plus (QSFP+) transceivers to connect the management ports.
These transceivers are not supported for use in the uplinks, downlinks, or access ports.
Chapter 2: Site Planning, Preparation, and Specifications
73