Cisco Nexus 9396TX User manual

Cisco Nexus 9396TX ACI-Mode Switch Hardware Installation Guide
First Published: 2014-11-05
Last Modified: 2019-03-28
Americas Headquarters
Cisco Systems, Inc.
170 West Tasman Drive
San Jose, CA 95134-1706
USA
http://www.cisco.com
Tel: [phone]
800 553-NETS (6387)
Fax: [phone]

THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS REFERENCED IN THIS DOCUMENTATION ARE SUBJECT TO CHANGE WITHOUT NOTICE.
EXCEPT AS MAY OTHERWISE BE AGREED BY CISCO IN WRITING, ALL STATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS DOCUMENTATION ARE
PRESENTED WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED.
The Cisco End User License Agreement and any supplemental license terms govern your use of any Cisco software, including this product documentation, and are located at:
http://www.cisco.com/go/softwareterms.Cisco product warranty information is available at http://www.cisco.com/go/warranty. US Federal Communications Commission Notices are found
here http://www.cisco.com/c/en/us/products/us-fcc-notice.html.
IN NO EVENT SHALL CISCO OR ITS SUPPLIERS BE LIABLE FOR ANY INDIRECT, SPECIAL, CONSEQUENTIAL, OR INCIDENTAL DAMAGES, INCLUDING, WITHOUT
LIMITATION, LOST PROFITS OR LOSS OR DAMAGE TO DATA ARISING OUT OF THE USE OR INABILITY TO USE THIS MANUAL, EVEN IF CISCO OR ITS SUPPLIERS
HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
Any products and features described herein as in development or available at a future date remain in varying stages of development and will be offered on a when-and if-available basis. Any
such product or feature roadmaps are subject to change at the sole discretion of Cisco and Cisco will have no liability for delay in the delivery or failure to deliver any products or feature
roadmap items that may be set forth in this document.
Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network
topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional
and coincidental.
The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based
on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language
that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product.
Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this URL: www.cisco.com
go trademarks. Third-party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any
other company. (1721R)
©2014–2017 Cisco Systems, Inc. All rights reserved.

CONTENTS
Trademarks ?
Preface vii
PREFACE
Audience vii
Documentation Conventions vii
Related Documentation viii
Documentation Feedback x
Obtaining Documentation and Submitting a Service Request x
Overview 1
CHAPTER 1
Overview 1
Preparing the Site 5
CHAPTER 2
Temperature Requirements 5
Humidity Requirements 5
Altitude Requirements 6
Dust and Particulate Requirements 6
Minimizing Electromagnetic and Radio Frequency Interference 6
Shock and Vibration Requirements 7
Grounding Requirements 7
Planning for Power Requirements 7
Airflow Requirements 9
Rack and Cabinet Requirements 10
Clearance Requirements 11
Installing the Chassis 13
CHAPTER 3
Cisco Nexus 9396TX ACI-Mode Switch Hardware Installation Guide
iii

Installation Options with Rack-Mount Kits 13
Install a Rack 13
Unpacking and Inspecting a New Switch 14
Planning How to Position the Chassis in the Rack 15
Installing the Chassis in a Two-Post Rack 16
Attaching Center-Mount Brackets to the Chassis 16
Installing the Chassis in a Two-Post Rack 17
Installing the Chassis in a Four-Post Rack 19
Installing the Switch using the N9K-C9300-RMK Rack-mount Kit 19
Attaching the Bottom-Support Rails to the Rack 19
Attaching Front-Mount Brackets to the Chassis 21
Installing the Chassis in a Four-Post Rack 22
Grounding the Chassis 24
Starting the Switch 26
Connecting the Switch to the ACI Fabric 29
CHAPTER 4
ACI Fabric Topology 29
Preparing to Connect to Other Devices 30
Connecting Leaf Switches to APICs 31
Connecting Leaf Switches to Spine Switches 33
Installing a Gigabit Ethernet module (GEM) 34
Migration of Nodes From a First Generation Switch to a Second Generation Switch 34
Setting Up an Optional Console Interface 36
Setting Up an Optional Management Connection 37
Maintaining Transceivers and Optical Cables 37
Replacing Modules 39
CHAPTER 5
Replacing the Uplink Module 39
Replacing a Fan Module During Operations 40
Replacing a Power Supply Module 42
Removing an AC Power Supply 42
Removing a DC Power Supply 43
Installing an AC Power Supply 43
Installing a DC Power Supply 44
Cisco Nexus 9396TX ACI-Mode Switch Hardware Installation Guide
iv
Contents

Wiring a 48 V DC Electrical Connector Block 45
Rack Specifications 47
APPENDIX A
Overview of Racks 47
General Requirements for Cabinets and Racks 47
Requirements Specific to Standard Open Racks 48
Requirements Specific to Perforated Cabinets 48
Cable Management Guidelines 48
System Specifications 49
APPENDIX B
Environmental Specifications 49
Switch Dimensions 49
Switch and Module Weights and Quantities 50
Transceiver and Cable Specifications 50
Switch Power Input Requirements 50
Power Specifications 51
650-W AC Power Supply Specifications 51
930-W DC Power Supply (Port-Side Intake) Specifications 51
930-W DC Power Supply (Port-Side Exhaust) Specifications 52
Power Cable Specifications 52
Power Cable Specifications for AC Power Supplies 53
DC Power Cable Specifications 54
Regulatory Standards Compliance Specifications 54
LEDs 57
APPENDIX C
Switch Chassis LEDs 57
Uplink Module LEDs 58
Fan Module LEDs 58
Power Supply LEDs 58
Additional Kits 61
APPENDIX D
Rack Mount Kit N9K-C9300-RMK 61
Site Preparation and Maintenance Records 63
APPENDIX E
Cisco Nexus 9396TX ACI-Mode Switch Hardware Installation Guide
v
Contents

Site Preparation Checklist 63
Contact and Site Information 64
Chassis and Module Information 65
Cisco Nexus 9396TX ACI-Mode Switch Hardware Installation Guide
vi
Contents

Preface
•Audience, on page vii
•Documentation Conventions, on page vii
•Related Documentation, on page viii
•Documentation Feedback, on page x
•Obtaining Documentation and Submitting a Service Request , on page x
Audience
This publication is for hardware installers and network administrators who install, configure, and maintain
Cisco Nexus switches.
Documentation Conventions
Command descriptions use the following conventions:
DescriptionConvention
Bold text indicates the commands and keywords that you enter literally
as shown.
bold
Italic text indicates arguments for which the user supplies the values.Italic
Square brackets enclose an optional element (keyword or argument).[x]
Square brackets enclosing keywords or arguments separated by a vertical
bar indicate an optional choice.
[x | y]
Braces enclosing keywords or arguments separated by a vertical bar
indicate a required choice.
{x | y}
Nested set of square brackets or braces indicate optional or required
choices within optional or required elements. Braces and a vertical bar
within square brackets indicate a required choice within an optional
element.
[x {y | z}]
Indicates a variable for which you supply values, in context where italics
cannot be used.
variable
Cisco Nexus 9396TX ACI-Mode Switch Hardware Installation Guide
vii

DescriptionConvention
A nonquoted set of characters. Do not use quotation marks around the
string or the string will include the quotation marks.
string
Examples use the following conventions:
DescriptionConvention
Terminal sessions and information the switch displays are in screen font.screen font
Information you must enter is in boldface screen font.boldface screen font
Arguments for which you supply values are in italic screen font.italic screen font
Nonprinting characters, such as passwords, are in angle brackets.< >
Default responses to system prompts are in square brackets.[ ]
An exclamation point (!) or a pound sign (#) at the beginning of a line
of code indicates a comment line.
!, #
Related Documentation
The Application Centric Infrastructure documentation set includes the following documents that are available
on Cisco.com at the following URL:
https://www.cisco.com/c/en/us/support/cloud-systems-management/application-policy-infrastructure-controller-apic/tsd-products-support-series-home.html.
Web-Based Documentation
•Cisco APIC Management Information Mode Reference
•Cisco APIC Online Help Reference
•Cisco APIC Python SDK Reference
•Cisco ACI Compatibility Tool
•Cisco ACI MIB Support List
Downloadable Documentation
•Knowledge Base Articles (KB Articles)are available at the following URL:
https://www.cisco.com/c/en/us/support/cloud-systems-management/application-policy-infrastructure-controller-apic/products-configuration-examples-list.html
•Cisco Application Centric Infrastructure Controller Release Notes
•Cisco Application Centric Infrastructure Fundamentals Guide
•Cisco APIC Getting Started Guide
•Cisco ACI Virtualization Guide
•Cisco APIC REST API User Guide
•Cisco APIC Command Line Interface User Guide
Cisco Nexus 9396TX ACI-Mode Switch Hardware Installation Guide
viii
Preface
Related Documentation

•Cisco APIC Faults, Events, and System Messages Management Guide
•Cisco ACI System Messages Reference Guide
•Cisco APIC Layer 4 to Layer 7 Services Deployment Guide
•Cisco APIC Layer 4 to Layer 7 Device Package Development Guide
•Cisco APIC Layer 4 to Layer 7 Device Package Test Guide
•Cisco ACI Firmware Management Guide
•Cisco ACI Troubleshooting Guide
•Cisco ACI Switch Command Reference, NX-OS Release 11.0
•Cisco Verified Scalability Guide for Cisco ACI
•Cisco ACI MIB Quick Reference
•Cisco Nexus CLI to Cisco APIC Mapping Guide
•Application Centric Inftrastructure Fabric Hardware Installation Guide
•Cisco NX-OS Release Notes for Cisco Nexus 9000 Series ACI-Mode Switches
•Cisco Nexus 9000 Series ACI Mode Licensing Guide
•Cisco Nexus 93108TX-EX ACI-Mode Switch Hardware Installation Guide
•Cisco Nexus 93108TX-FX ACI-Mode Switch Hardware Installation Guide
•Cisco Nexus 93120TX ACI-Mode Switch Hardware Installation Guide
•Cisco Nexus 93128TX ACI-Mode Switch Hardware Installation Guide
•Cisco Nexus 93180LC-EX ACI-Mode Switch Hardware Installation Guide
•Cisco Nexus 93180YC-EX ACI-Mode Switch Hardware Installation Guide
•Cisco Nexus 93180YC-FX ACI-Mode Switch Hardware Installation Guide
•Cisco Nexus 9332PQ ACI-Mode Switch Hardware Installation Guide
•Cisco Nexus 9336PQ ACI-Mode Switch Hardware Installation Guide
•Cisco Nexus 9372PX and 9372PX-E ACI-Mode Switches Hardware Installation Guide
•Cisco Nexus 9372TX and 9372TX-E ACI-Mode Switches Hardware Installation Guide
•Cisco Nexus 9396PX ACI-Mode Switch Hardware Installation Guide
•Cisco Nexus 9396TX ACI-Mode Switch Hardware Installation Guide
•Cisco Nexus 9504 ACI-Mode Switch Hardware Installation Guide
•Cisco Nexus 9508 ACI-Mode Switch Hardware Installation Guide
•Cisco Nexus 9516 ACI-Mode Switch Hardware Installation Guide
Cisco Nexus 9396TX ACI-Mode Switch Hardware Installation Guide
ix
Preface
Preface

Cisco Application Centric Infrastructure (ACI) Simulator Documentation
The following Cisco ACI Simulator documentation is available at
https://www.cisco.com/c/en/us/support/cloud-systems-management/application-centric-infrastructure-simulator/tsd-products-support-series-home.html.
•Cisco ACI Simulator Release Notes
•Cisco ACI Simulator Installation Guide
•Cisco ACI Simulator Getting Started Guide
Cisco Nexus 9000 Series Switches Documentation
The Cisco Nexus 9000 Series Switches documentation is available at
https://www.cisco.com/c/en/us/support/switches/nexus-9000-series-switches/tsd-products-support-series-home.html.
Cisco Application Virtual Switch Documentation
The Cisco Application Virtual Switch (AVS) documentation is available at
https://www.cisco.com/c/en/us/support/switches/application-virtual-switch/tsd-products-support-series-home.html.
Documentation Feedback
To provide technical feedback on this document, or to report an error or omission, please send your comments
to [email protected]. We appreciate your feedback.
Obtaining Documentation and Submitting a Service Request
For information on obtaining documentation, using the Cisco Bug Search Tool (BST), submitting a service
request, and gathering additional information, see What's New in Cisco Product Documentation, at:
https://www.cisco.com/warp/public/687/Directory/DirTAC.shtml.
Subscribe to What's New in Cisco Product Documentation, which lists all new and revised Cisco technical
documentation as an RSS feed and delivers content directly to your desktop using a reader application. The
RSS feeds are a free service.
Cisco Nexus 9396TX ACI-Mode Switch Hardware Installation Guide
x
Preface
Documentation Feedback

CHAPTER 1
Overview
•Overview, on page 1
Overview
The Cisco Nexus 9396TX switch (N9K-C9396TX) is a 2-RU, fixed-port switch designed for spine-leaf-APIC
deployment in data centers. This switch has 48 fixed 1- and 10-GBASE-T APIC-facing ports and a choice of
6- or 12-port uplink modules for connections to spine switches. The chassis for this switch includes the
following user-replaceable components:
• Uplink modules (one of either of the following for uplink ports)
• M6PQ uplink module (6-port, 40-Gigabit Ethernet module)
• M6PQ-E uplink module (6-port, 40-Gigabit Ethernet module)
• M12PQ uplink module (12-port, 10/40-Gigabit Ethernet module)
• Fan modules (three—two for operations and one for redundancy [2+1]) with the following airflow
choices:
• Port-side intake version with burgundy coloring (N9K-C9300-FAN2)
• Port-side exhaust version with blue coloring (N9K-C9300-FAN2-B)
• Power supplies (two—one for operations and one for redundancy [1+1]) with the following airflow
choices:
• 650-W AC power supply with port-side intake airflow (burgundy coloring) (N9K-PAC-650W)
• 650-W AC power supply with port-side exhaust airflow (blue coloring) (N9K-PAC-650W-B)
• 930-W DC power supply with port-side intake airflow (green coloring) (UCSC-PSU-930WDC)
• 930-W DC power supply with port-side exhaust airflow (gray coloring) (UCS-PSU-6332-DC)
Do not mix AC and DC power supplies in the same chassis.
Note
Cisco Nexus 9396TX ACI-Mode Switch Hardware Installation Guide
1

All fan modules and power supplies must use the same airflow direction during
operations.
Note
The switch supports the Fabric Extenders (FEXs) listed at
https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/hw/interoperability/fexmatrix/fextables.html.
The following figure shows the hardware features seen from the port side of the chassis.
M6PQ, M6PQ-E, or M12PQ uplink module
(M12PQ uplink module shown).
6Console port (RS232 port)1
6- or 12-port 40-Gigabit Ethernet Quad Small
Form-Factor Plugable (QSFP+) optical ports for
connections to spine switches (12-port uplink
module shown)
7Chassis LEDs
• Beacon (BCN)
• Status (STS)
• Environment (ENV)
2
Notch in both sides of the chassis for locking the
power supply end of the chassis to the
bottom-support rails
8Two USB ports used for saving or copying
functions
USB support is limited to USB 2.0
devices that use less than 2.5 W
(less than 0.5 A inclusive of surge
current). Devices, such as external
hard drives, that instantaneously
draw more than 0.5 A are not
supported.
Note
3
Screw holes (4) for attaching a center-mount rack
bracket for two-post racks (one bracket for each
of two sides)
9Out-of-band management port (RJ-45 port)4
Cisco Nexus 9396TX ACI-Mode Switch Hardware Installation Guide
2
Overview
Overview

Screw holes (2) for attaching a front-mount
bracket for four-post racks (one bracket on each
of two sides)
1048 10GBASE-T copper ports (supporting
100-Megabit, 1-Gigabit, and 10-Gigabit speeds)
for connections to Application Policy
Infrastructure Controllers (APICs)
5
To determine which transceivers, adapters, and cables are supported by this switch, see the Cisco Transceiver
Modules Compatibility Information document.
The following figure shows the hardware features seen from the fan side of the chassis.
Chassis LEDs are as follows:
• Beacon (BCN)
• Status (STS)
5Screw holes (2) for attaching the grounding lug.1
Screw holes (4) for attaching a center-mount rack
bracket for two-post racks (one bracket for each of
two sides).
6Notch in both sides of the chassis for locking the fan
end of the chassis to the bottom-support rails.
2
Screw holes (2) for attaching a front-mount bracket
for 4-post racks (1 bracket on each of 2 sides).
7Two power supply modules (AC power supply shown)
Power supply slots are numbered 1 on the left and 2
on the right (as seen when looking at the power
supplies).
3
Three fan modules (2 used for operations and one
used for redundancy) of the following types:
Fan slots are numbered 1 (leftmost slot) to 3
(rightmost slot).
4
Depending on whether you plan to position the ports in a hot or cold aisle, you can order the fan and power
supply modules with port-side intake or port-side exhaust airflow. For port-side intake airflow, the fan and
AC power supply modules have burgundy coloring (DC power supply modules have green coloring). For
port-side exhaust airflow, the fan and AC power supplies have blue coloring (DC power supply modules have
gray coloring).
Cisco Nexus 9396TX ACI-Mode Switch Hardware Installation Guide
3
Overview
Overview

The fan and power supply modules are field replaceable and you can replace one fan module or one power
supply module during operations so long as the other modules are installed and operating. If you have only
one power supply installed, you can install the replacement power supply in the open slot before removing
the original power supply.
All of the fan and power supply modules must have the same direction of airflow. Otherwise, the switch can
overheat and shut down. If you are installing a dual-direction power supply, that module will automatically
use the same airflow direction as the other modules in the switch.
Note
If the switch has port-side intake airflow (burgundy coloring for fan modules), you must locate the ports in
the cold aisle. If the switch has port-side exhaust airflow (blue coloring for fan modules), you must locate the
ports in the hot aisle. If you locate the air intake in a hot aisle, the switch can overheat and shut down.
Caution
Cisco Nexus 9396TX ACI-Mode Switch Hardware Installation Guide
4
Overview
Overview

CHAPTER 2
Preparing the Site
•Temperature Requirements, on page 5
•Humidity Requirements, on page 5
•Altitude Requirements, on page 6
•Dust and Particulate Requirements, on page 6
•Minimizing Electromagnetic and Radio Frequency Interference, on page 6
•Shock and Vibration Requirements, on page 7
•Grounding Requirements, on page 7
•Planning for Power Requirements, on page 7
•Airflow Requirements, on page 9
•Rack and Cabinet Requirements, on page 10
•Clearance Requirements, on page 11
Temperature Requirements
The switch requires an operating temperature of 32 to 104 degrees Fahrenheit (0 to 40 degrees Celsius). If
the switch is not operating, the temperature must be between –40 to 158 degrees Fahrenheit (–40 to 70 degrees
Celsius).
Humidity Requirements
High humidity can cause moisture to enter the switch. Moisture can cause corrosion of internal components
and degradation of properties such as electrical resistance, thermal conductivity, physical strength, and size.
The switch is rated to withstand from 5- to 95-percent (nonoperating) and 5- to 90-percent (operating) relative
humidity.
Buildings in which the climate is controlled by air-conditioning in the warmer months and by heat during the
colder months usually maintain an acceptable level of humidity for the switch equipment. However, if the
switch is located in an unusually humid location, use a dehumidifier to maintain the humidity within an
acceptable range.
Cisco Nexus 9396TX ACI-Mode Switch Hardware Installation Guide
5

Altitude Requirements
Altitude rating is based on power supply installed; see critical components list in the system CB report for
altitude rating.
Dust and Particulate Requirements
Exhaust fans cool power supplies and system fans cool switches by drawing in air and exhausting air out
through various openings in the chassis. However, fans also ingest dust and other particles, causing contaminant
buildup in the switch and increased internal chassis temperature. Dust and particles can act as insulators and
interfere with the mechanical components in the switch. A clean operating environment can greatly reduce
the negative effects of dust and other particles.
In addition to keeping your environment free of dust and particles, follow these precautions to avoid
contamination of your switch:
• Do not permit smoking near the switch.
• Do not permit food or drink near the switch.
Minimizing Electromagnetic and Radio Frequency Interference
Electromagnetic interference (EMI) and radio frequency interference (RFI) from the switch can adversely
affect other devices, such as radio and television (TV) receivers. Radio frequencies that emanate from the
switch can also interfere with cordless and low-power telephones. Conversely, RFI from high-power telephones
can cause spurious characters to appear on the switch monitor.
RFI is defined as any EMI with a frequency above 10 kHz. This type of interference can travel from the switch
to other devices through the power cable and power source or through the air as transmitted radio waves. The
Federal Communications Commission (FCC) publishes specific regulations to limit the amount of EMI and
RFI that are emitted by computing equipment. Each switch meets these FCC regulations.
To reduce the possibility of EMI and RFI, follow these guidelines:
• Cover all open expansion slots with a blank filler plate.
• Always use shielded cables with metal connector shells for attaching peripherals to the switch.
When wires are run for any significant distance in an electromagnetic field, interference can occur to the
signals on the wires with the following implications:
• Bad wiring can result in radio interference emanating from the plant wiring.
• Strong EMI, especially when it is caused by lightning or radio transmitters, can destroy the signal drivers
and receivers in the chassis and even create an electrical hazard by conducting power surges through
lines into equipment.
To predict and prevent strong EMI, you need to consult experts in radio frequency interference (RFI).
Note
Cisco Nexus 9396TX ACI-Mode Switch Hardware Installation Guide
6
Preparing the Site
Altitude Requirements

The wiring is unlikely to emit radio interference if you use a twisted-pair cable with a good distribution of
grounding conductors. If you exceed the recommended distances, use a high-quality twisted-pair cable with
one ground conductor for each data signal when applicable.
If the wires exceed the recommended distances, or if wires pass between buildings, give special consideration
to the effect of a lightning strike in your vicinity. The electromagnetic pulse that is caused by lightning or
other high-energy phenomena can easily couple enough energy into unshielded conductors to destroy electronic
switches. You will want to consult experts in electrical surge suppression and shielding if you had similar
problems in the past.
Caution
Shock and Vibration Requirements
The switch has been shock- and vibration-tested for operating ranges, handling, and earthquake standards.
Grounding Requirements
The switch is sensitive to variations in voltage that is supplied by the power sources. Overvoltage, undervoltage,
and transients (or spikes) can erase data from memory or cause components to fail. To protect against these
types of problems, ensure that there is an earth-ground connection for the switch. You can connect the grounding
pad on the switch either directly to the earth-ground connection or to a fully bonded and grounded rack.
When you properly install the chassis in a grounded rack, the switch is grounded because it has a metal-to-metal
connection to the rack. Alternatively, you can ground the chassis by using a customer-supplied grounding
cable that meets your local and national installation requirements. For U.S. installations, we recommend
6-AWG wire. Connect your grounding cable to the chassis with a grounding lug (provided in the switch
accessory kit) and to the facility ground.
You automatically ground AC power supplies when you connect them to AC power sources. For DC power
supplies, you must connect a grounding wire when wiring the power supply to the DC power source.
Note
An electrical conducting path shall exist between the product chassis and the metal surface of the enclosure
or rack in which it is mounted or to a grounding conductor. Electrical continuity shall be provided by using
thread-forming type mounting screws that remove any paint or non-conductive coatings and establish a
metal-to-metal contact. Any paint or other non-conductive coatings shall be removed on the surfaces between
the mounting hardware and the enclosure or rack. The surfaces shall be cleaned and an antioxidant applied
before installation.
Note
Planning for Power Requirements
The switch includes two power supplies (1-to-1 redundancy with current sharing) in one of the following
combinations:
Cisco Nexus 9396TX ACI-Mode Switch Hardware Installation Guide
7
Preparing the Site
Shock and Vibration Requirements

• Two 650-W AC power supplies
• Two 930-W DC power supplies
Both power supplies must be the same type. Do not mix AC and DC power supplies in the same chassis.
Note
For n+1 redundancy, you can use one or two power sources for the two power supplies. For n+nredundancy,
you must use two power sources and connect each power supply to a separate power source.
Note
The power supplies are rated to output up to 650 W (AC power supplies) or up to 930 W (DC power supplies),
but the switch requires less than those amounts of power from the power supply. To operate the switch, you
must provision enough power from the power source to cover the requirements of both the switch and a power
supply. Typically, this switch and a power supply require about 427 W of power input from the power source,
but you must provision as much as 712 W power input from the power source to cover peak demand.
Some of the power supply modules have rating capabilities that exceed the switch requirements. When
calculating your power requirements, use the switch requirements to determine the amount of power that is
required for the power supplies.
Note
To minimize the possibility of circuit failure, make sure that each power-source circuit that is used by the
switch is dedicated to the switch.
For AC input application, please refer to the following statement:
Note
Statement 1005—Circuit Breaker when using AC power supplies
This product relies on the building's installation for short-circuit (overcurrent) protection. Ensure that the
protective devices are rated not greater than 20A (North America), 16A (Europe), and 13A (UK).
Warning
For DC input application, please refer to the following statement:
Note
Cisco Nexus 9396TX ACI-Mode Switch Hardware Installation Guide
8
Preparing the Site
Planning for Power Requirements

Statement 1005—Circuit Breaker when using DC power supplies
This product relies on the building's installation for short-circuit (overcurrent) protection.
• Ensure that the protective devices are rated not greater than 30A when the switch is powered with regular
DC power supplies (rated 48-60VDC).
• Ensure that the protective devices are rated not greater than 10A when the switch is powered with HVDC
power supplies (rated 240-350VDC).
Warning
Statement 1033
Connect the unit only to DC power source that complies with the Safety Extra-Low Voltage (SELV)
requirements in IEC 60950 based safety standards.
Warning
We recommend 8-AWG wire for DC installations in the U.S.
Note
For the power cables to use with the power supplies, see Power Cable Specifications, on page 52.
Note
Airflow Requirements
The switch is positioned with its ports in either the front or the rear of the rack depending on your cabling
and maintenance requirements. You must have fan and power supply modules that move the coolant air from
the cold aisle to the hot aisle in one of the following ways:
• Port-side exhaust airflow—Cool air enters the chassis through the fan and power supply modules in the
cold aisle and exhausts through the port end of the chassis in the hot aisle.
• Port-side intake airflow—Cool air enters the chassis through the port end in the cold aisle and exhausts
through the fan and power supply modules in the hot aisle.
You can identify the airflow direction of each fan and power supply module by its coloring as follows:
• Blue coloring indicates port-side exhaust airflow.
• Burgundy coloring indicates port-side intake airflow.
• White coloring on HVAC/HVDC power supplies indicates dual-direction airflow.
• Gray coloring on DC power supplies indicates port-side exhaust airflow.
• Green coloring on DC power supplies indicates port-side intake airflow.
Cisco Nexus 9396TX ACI-Mode Switch Hardware Installation Guide
9
Preparing the Site
Airflow Requirements

To prevent the switch from overheating and shutting down, you must position the air intake for the switch in
a cold aisle. The fan and power supply modules must have the same direction of airflow (even if their coloring
is different). If you must change the airflow direction for the switch, you must shutdown the switch before
changing the modules.
Note
Rack and Cabinet Requirements
You can install the following types of racks or cabinets for your switch:
• Standard perforated cabinets
• Solid-walled cabinets with a roof fan tray (bottom-to-top cooling)
• Standard open four-post Telco racks
• Standard open two-post Telco racks
Installation into a two-post rack in not suggested, nor is it earthquake safe nor
NEBS compliant
Note
Work with your cabinet vendors to determine which of their cabinets meet the following requirements or see
the Cisco Technical Assistance Center (TAC) for recommendations:
• Use a standard 19-inch (48.3-cm), four-post Electronic Industries Alliance (EIA) cabinet or rack with
mounting rails that conform to English universal hole spacing per section 1 of the ANSI/EIA-310-D-1992
standard.
• The depth of a four-post rack must be 24 to 32 inches (61.0 to 81.3 cm) between the front and rear
mounting rails (for proper mounting of the bottom-support brackets or other mounting hardware).
• Required clearances between the chassis and the edges of its rack or the interior of its cabinet are as
follows:
• 4.5 inches (11.4 cm) between the front of the chassis and the interior of the cabinet (required for
cabling).
•3.0 inches (7.6 cm) between the rear of the chassis and the interior of the cabinet (required for airflow
in the cabinet if used).
• No clearance is required between the chassis and the sides of the rack or cabinet (no side airflow).
Also, you must have power receptacles that are located within reach of the power cords that are used with the
switch.
Cisco Nexus 9396TX ACI-Mode Switch Hardware Installation Guide
10
Preparing the Site
Rack and Cabinet Requirements