HP aruba 9300-32D Series User manual

HPE Aruba Networking 9300-
32D Switch Series
Installation and Getting Started Guide

|2
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Contents
Contents
Contents 3
About this Document 5
Applicable Products 5
Related Publications 5
Introducing the Switches 6
Overview 6
Front of the Switches 6
Network Ports 7
Split Mode (QSFP-DD) 7
Management Ports 8
Console Port 8
Out-of-band Management (OOBM) Port 8
USB-A Aux Port 9
Chassis and Port LEDs on the front of the switch 9
LED Behavior 10
Switch Product Label 12
Back of the Switch 12
Power Supplies 13
Power Supply Instructions 15
Power Supply Status LED 16
Load Sharing 16
Redundancy 16
Hot Swapping 16
Fan Trays 16
Fan Tray Status LED 18
Switch Features 18
Installing the switch 19
Included Parts 19
Installation Procedures for 9300-32D Switches 19
Installation Precautions and Guidelines 20
Prepare the Installation Site 21
Install Power Supplies 21
Install Fan Trays 22
Power-on the switch and check LEDs 23
Power off the switch 23
Mount the Switch 23
Two-post Rack Mount Option 23
Four-Post Rack Mount Option 25
Install Transceivers 30
Connect the Switch to a Power Source 31
Setup for Initial Configuration 32
Connect Network Cables 32
Using RJ-45 Out-of-band Management Port 32
Connecting Cables to Transceivers 33
HPE Aruba Networking 9300-32D Switch Series | Installation and Getting Started Guide
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Contents |4
Initial Configuration with an Out-of-Band Serial Connection 34
Terminal Configuration 34
Connect to a Console Port 34
Console Cable Pinout 34
RJ-45 to DB-9 pinouts 35
Replacing Components 36
Replacing a Power Supply 36
Replacing a Fan Tray 37
Troubleshooting 40
Basic Troubleshooting Tips 40
Diagnosing with the LEDs 40
LED Patterns for General Switch Troubleshooting 41
Diagnostic Tips 41
Hardware Diagnostic Tests 43
Testing the switch by resetting it 43
Checking the Switch LEDs 44
Checking Console Messages 44
Testing Switch-to-Device Network Communications 44
Testing End-to-End Networking Communications 44
Specifications 45
Physical 45
Electrical 45
Power Cords 46
Power Consumption 46
Environmental Specifications 46
Acoustics 47
RoHS 47
Safety and Regulatory Information 47
Connectivity Standards 48
Support and other resources 49
Accessing Aruba Support 49
Accessing Updates 49
Aruba Support Portal 50
My Networking 50
Warranty Information 50
Regulatory Information 50
Documentation Feedback 50

Chapter 1
About this Document
About this Document
This document is intended for network administrators and support personnel.
The display and command line illustrated in this document are examples and might not exactly match your
particular switch or environment.
The switch and accessory drawings in this document are for illustration only, and may not exactly match your
particular switch and accessory products.
Applicable Products
R9A29A Aruba 9300-32D 32p 100/200/400G QSFP-DD 2p 10G SFP+ Front-to-Back 6
Fans 2 AC PSU Bundle
R9A30A Aruba 9300-32D 32p 100/200/400G QSFP-DD 2p 10G SFP+ Back-to-Front 6
Fans 2 AC PSU Bundle
R8Z96A Aruba 9300-32D 32p 100/200/400G QSFP-DD 2p 10G Switch
R8Z97A Aruba 9300 1500W 100-240VAC Front-to-Back AC Power Supply
R8Z98A Aruba 9300 1500W 100-240VAC Back-to-Front AC Power Supply
R8Z99A Aruba 9300 Front-to-Back Fan
R9A00A Aruba 9300 Back-to-Front Fan
Related Publications
nStart Here: Installation, Safety, and Regulatory Information for the Aruba 9300-32D Switches
nArubaOS-Switch and ArubaOS-CX Transceiver Guide
nArubaOS-CX software manuals
To view and download these publications, visit the Aruba Support Portal at
https://asp.arubanetworks.com/downloads.
HPE Aruba Networking 9300-32D Switch Series | Installation and Getting Started Guide
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Chapter 2
Introducing the Switches
Introducing the Switches
The Aruba CX 9300 Switch Series is a next-generation 25.6Tbps, 1U fixed configuration switch supporting
32-ports of 100/200/400GbE. The switch is an ideal solution for flexible, cost-effective, high-density 400GbE
connectivity server, storage, and intra-fabric connectivity.
This chapter describes these switches with the following information:
Front of switches:
nNetwork ports
nManagement ports
nChassis and Port LEDs
nLED behavior
nSwitch product label (Pull tab)
Back of switches:
nChassis grounding location
nPower supplies
nFan trays
Overview
The Aruba 9300 Switch Series is a family of premium networking switches, ideal for enterprise data centers,
network aggregation and core. They provide the foundation for high-performance networks supporting IoT,
mobile, and cloud applications.
These switches are intended for indoor use only. They are for use in commercial applications. A typical
installation is in an environmentally controlled data center. The end use environment may or may not be a
restricted access location.
Front of the Switches
Figure 1 Example of an 9300-32D switch
HPE Aruba Networking 9300-32D Switch Series | Installation and Getting Started Guide
6

Introducing the Switches |7
Label Description
1Clock output connector
2Out-of-Band Management port
3USB Type-A auxiliary port
4QSFP56-DD ports
5SFP+ ports
6Switch product label. Pull the tab out to view the product label information.
7Reset button
8RJ-45 console port
9 Micro USB console port
Network Ports
Switch Model name QSFP-DD ports SFP+ ports
R8Z96A Aruba 9300-32D 32-port 100/200/400G
QSFP-DD 2-port 10G SFP+ Switch 32 2
For supported transceivers, see the latest version of the ArubaOS-Switch and ArubaOS-CX Transceiver Guide.
Split Mode (QSFP-DD)
QSFP-DD ports on the Aruba 9300-32Dswitch series are capable of operating as “split port” using the
CLI command:
split [<count>] [<speed>] [confirm]
The <count> indicates how many split “ends” are to be configured, and what <speed> those “ends” will be
running.
<count> of
Split ‘ends’
<speed> of
the ‘ends’
Example product (see datasheet for more)
“*” are the solution on the far end of the link
4100G R9B48A Aruba 400G Q-DD to 4xQSFP56 100G 7m AOC
R9B42A Aruba 400G Q-DD MPO12 eDR4 2km SMF XCVR
* R9B63A ARUBA 100G QSFP28 LC FR1 2KM SMF XCVR
2200G R9B53A Aruba 400G Q-DD to 2xQSFP56 200G 7m AOC
* connect to HPE Server Adapters that are 200G QSFP56

HPE Aruba Networking 9300-32D Switch Series | Installation and Getting Started Guide 8
<count> of
Split ‘ends’
<speed> of
the ‘ends’
Example product (see datasheet for more)
“*” are the solution on the far end of the link
2100G R9B58A 200G QDD to 2xQSFP28 100G 7m AOC
425G (845420-B21)HPE QSFP28 to 4x25G SFP28 7m AOC (HPE Server product)
JL309A Aruba 100G QSFP28 MPO SR4 MMF XCVR
* JL309A Aruba 100G QSFP28 MPO SR4 100m MMF XCVR
410G (845420-B21) HPE QSFP28 to 4x25G SFP28 7m AOC {HPE Server product}
* connect to ports that are 10G SFP capable
JH233A HPE X142 40G QSFP+ MPO eSR4 300M XCVR
* J9150D Aruba 10G SFP+ LC SR 300m MMF XCVR
The 400G to 400G products do not need the “split” command.
Management Ports
The following section provides information about the Console Port, Out-of-band Management (OOBM)
Port, and the USB-A Aux port.
Console Port
Aruba 9300-32D switches include an RJ-45 serial console port on the front of the switch. This port is used to
connect a console to the switch by using an RJ-45 serial cable (not supplied). A DB9-to-RJ-45 console cable
can be ordered from HPE: JL448A, Aruba X2C2 RJ45 to DB9 Console Cable or R9G48A Aruba USB-A to RJ45
PC-to-Switch Cable; R9J32A Aruba USB-A to USB-C PC-to-Switch Cable ; R9J33A Aruba USB-C to USB-C PC-
to-Switch Cable.
The 9300-32D switches also include a micro-USB port on the front of the switch. This port can be used to
connect a console to the switch by using a standard micro-USB cable (not supplied). The micro-USB has
precedence for input. If both cables are plugged in, the console output is echoed to both the RJ-45 and the
micro-USB ports, but the input is only accepted from the micro-USB port.
nUse of the micro-USB port may require the installation of a standard USB driver. New Windows installs
include the driver by default.
nUSB driver available from Aruba:
https://support.arubanetworks.com/ToolsResources/tabid/76/DMXModule/514/Default.aspx?EntryId=7512
For more information on the console connection, see Setup for Initial Configuration on page 32. The
console can be a PC or workstation running a VT-100 terminal emulator, or a VT-100 terminal.
The Aruba CX mobile app and the Aruba USB-A Bluetooth adapter (separately orderable SKU# S1H23A)
enable you to configure your switch from your mobile device. For information about using the Aruba CX
mobile app to configure the switch, see the Fundamentals Guide for your switch and software release.
Out-of-band Management (OOBM) Port
This RJ-45 port is used to connect a dedicated management network to the switch. To use it, connect an RJ-
45 network cable to the management port to manage the switch through Telnet from a remote PC or a
UNIX workstation.

Introducing the Switches |9
To use this port, the switch must have an IP address. IP settings can be configured through a console port
connection or automatically from a DHCP/Bootp server.
A networked out-of-band connection through the management port allows you to manage data network
switches from a physically and logically separate management network.
For more information, see the Fundamentals Guide for your switch.
USB-A Aux Port
The USB-A port is used for file management, downloading switch software or use of Aruba accessories. This
port uses a USB Type-A connector.
Chassis and Port LEDs on the front of the switch
Figure 1 Chassis and Port LEDs for the Aruba 9300-32D
Label Description
1Unit Identification/Locator LED
2Global Status LED
3Power Supply 1 Status LED
4Power Supply 2 Status LED
5Fan Status LED
6Reserved for future use
7 Out-Of-Band-Management Link/Activity LED
8QSFP56-DD port indicator LEDs
9SFP+ port indicator LEDs

HPE Aruba Networking 9300-32D Switch Series | Installation and Getting Started Guide 10
LED Behavior
LEDs Function Switch
Behavior LED State Meaning
QSFP-DD port
indicator
Displays
Link
information
for the
port.
Startup On Green OS-CX: Default
SVOS: Default
Normal OFF No valid link
Normal On Green Valid link indication
Fault FLASH Amber blinks
with Global Status LED.
Fault
QSFP-DD port
indicator in split
mode, all lanes
correspond to the
single LED
Displays
Link
information
for the
port.
Startup On Green OS-CX: Default
SVOS: Default
Normal OFF No valid link
On Green Valid link indication on one or
more lanes.
Fault OFF No fault
FLASH Amber blinks
with Global Status LED.
Fault on one or more lanes
Out-Of-Band-
Management
Link/Activity
Displays
Link and
Activity
information
for the
OOBM
port.
Normal OFF OOBM port is not connected, no
link established
On Green Valid link indication
Activity Flicker Green Indicator of traffic activity. The
blink time is roughly proportional
to the % of full bandwidth
utilization of the port.
Fault Not Implemented No fault defined

Introducing the Switches |11
LEDs Function Switch
Behavior LED State Meaning
Global Status
Indicator
Displays
overall
health
status for
the unit.
Startup Flash Green OS-CX: ArubaOS loading
FLASH Green SVOS: Self test in progress
Normal ON Green OS-CX: Self test PASS, Fans and
PSUs OK
Fault FLASH Amber OS-CX: Fault Indicates Power
supply, Fan tray or Port fault by
FLASHING with faulted device.
Can also blink alone to indicate
thermal or endurance issues. See
Event Logs for more detail on all
faults.
SVOS: Self test failure
Unit
Identification/Locator
Customer
selectable
through CLI
to help
ID/Locate
unit.
Normal Off User defined the locator led:OFF
On/Flashing Blue User define the locator led:
On/Flash
Fault Not implemented No fault defined
PSU 1 and PSU 2 Indicates
status of
modular
PSUs on
the back of
the switch.
Normal On Green Normal operation
Fault FLASH Amber Blinks
with Global Status LED. The PSU is missing or power is not
connected to the PSU, invalid AC
input or invalid DC output or, if
power is connected, the PSU is in
protection mode due to a voltage,
current, thermal, or short-circuit
condition.
Fan Health Status Indicates
status of
modular
fans on the
back of the
switch.
Normal On Green Normal Operation
Fault Flash Amber with
Global Status LED
Fan fault by missing fan tray, fan
tray with misconfiguration of air
flow, or faulty fan.
Fan tray indicator Indicates
status of
the fan
tray.
Normal On Green Normal operation
Fault Flash Amber Fan fault, fan has
misconfiguration of air flow, or
fan is missing.
PSUModule
indicator
Indicates
status of
PSU
module.
Normal
operation
On Green Normal operation

HPE Aruba Networking 9300-32D Switch Series | Installation and Getting Started Guide 12
LEDs Function Switch
Behavior LED State Meaning
Fault Flash Green PSUFWupgrade in progress.
Off PSUfan faults, no ACto both PSU,
PSUin protection mode or system
did not send PSOK.
Switch Product Label
The switch product label is located on the orange pull tab on the bottom right side of the switch front panel.
Pull the tab out to view the product label information.
The product label information includes the part number, model number, serial number, and MAC address.
The information and bar codes are duplicated on the top and bottom of the product label tab.
Figure 1 Aruba 9300-32D switch product label (pull tab)
Label Description
1 Country of origin and Serial number
2 Part number, Serial number and MAC address
Back of the Switch
The back of 9300-32D switches include two power supply units and six fan trays.
Figure 1 Fans and power supplies on the back of the switch

Introducing the Switches |13
Label Description
1 Power Supply 1
2 Fan Tray 1
3 Fan Tray 2
4 Fan Tray 3
5 Fan Tray 4
6 Fan Tray 5
7 Fan Tray 6
8 Power Supply 2
9 Power Supply vents
Figure 2 LEDs and components on the back of the switch
Label Description
1 Optional Ground Lug mounting locations
2 Power Supply status LED
3AC Inlet (C14 Socket)
4 Fan Tray status LED
Power Supplies
The Aruba 9300-32D switch does not have a power switch; it is powered on when at least one installed
power supply is connected to an active AC power source. The power supplies automatically adjust to any
voltage between 100-127 and 200-240 volts and either 50 or 60 Hz. There are no voltage range settings
required.
WARNING: 9300-32D PSUs can use High Line or Low Line. However, using a Low Line source limits the
supported optical QSFP-DD transceivers only to 8. Attempting to use more than 8 QSFP-DD transceivers
can cause the 9300-32D to reboot, after getting in a brown-out condition. The 9300-32D may continue to
experience a reboot loop until adequate power is provided to its PSUs, or when the PSU uses High Line. For
production environment, the 9300-32D requires High Line to ensure proper operations.
Never insert or remove a power supply while the power cord is connected. Verify that cord has been disconnected
from the power supply before installation or removal.

HPE Aruba Networking 9300-32D Switch Series | Installation and Getting Started Guide 14
The Aruba 9300-32D switch power supplies adapt electrical power for use with the switch. The chassis has
two slots that can hold individual power supplies to support load sharing, redundancy, and fault tolerance.
System airflow direction is configured automatically at system initialization and cannot be reconfigured by the user.
System airflow direction is determined by the power supply type installed in PS1 at initialization time (or PS2 if PS1
is absent or faulted). Any fan tray or power supply of conflicting airflow type will be disabled by the system. Ensure
only matching fan trays and power supplies are used at any given runtime.
Figure 1 Aruba 9300-32D power supplies
Label Description
1 Power Supply status LED
2 Release Latch
The Aruba 9300-32D switch is shipped with two hot-swappable, field-replaceable, AC power supplies. Each
power supply has a country-specific power cord for connection to an AC power outlet. The switch can
continue to operate with one active power supply if the other one fails, however, two power supplies are
recommended for redundancy, fault tolerance, and cooling. Depending on your configuration, the switch is
compatible with one of the following power supplies:

Introducing the Switches |15
n(R8Z99A) Aruba 9300 1500W 100-240VAC Front-to-Back AC Power Supply
n(R9A00A) Aruba 9300 1500W 100-240VAC Back-to-Front AC Power Supply
Power Supply Instructions
For indoor use only. The switch, AC power cord and all connected cables are not designed for outdoor use.
During installation, ensure that the ACpower cord is NOT connected to the power supply being installed.
Shock hazard. To completely remove power from the switch, disconnect all power cords.

HPE Aruba Networking 9300-32D Switch Series | Installation and Getting Started Guide 16
For important safety, environmental, and regulatory information, see Safety and Compliance Information for
Server, Storage, Power, Networking, and Rack Products, available at http://www.hpe.com/support/Safety-
Compliance-EnterpriseProducts
Brazil Statement Este equipamento deve ser conectado obrigatoriamente em tomada de rede de energia
elétrica que possua aterramento (três pinos), conforme a Norma NBR ABNT 5410,
visando a segurança dos usuários contra choques elétricos.)
Power Supply Status LED
Chassis LEDs Function State Meaning
Status LED Displays power
supply status
ON green The power supply is operating normally.
FLASH green PSU FW upgrade in progress.
OFF PSU fan faults, no AC to both PSU, PSU in
protection mode or system did not send
PSOK.
Load Sharing
Load sharing occurs when two power supplies are installed in the switch and turned on. Load sharing divides
the total power load of the switch among both power supplies.
Redundancy
With power redundancy, the Aruba 9300 switch can continue normal operation even when one power
supply fails or is powered off. When two power supplies are installed, if one becomes unavailable (failed,
powered off, or removed) the remaining power supply provides full power for the device. While the switch
can continue normal operation, the Global Status and PS1/PS2 LEDs will blink in Amber to notify user that
there is a fault on either PS1/PS2.
Even though the switch will run with one power supply removed, for thermal integrity reasons it is highly
recommended not to remove a failed power supply, until the replacement can be installed.
Hot Swapping
Hot swapping allows you to replace one failed power supply while the other provides full power. This makes
it unnecessary to shut down the switch during the replacement procedure.
Never insert or remove a power supply while the power cord is connected. Verify that the cord has been
disconnected from the power supply before installation or removal.
Fan Trays
The switch is equipped with six field-replaceable, hot-swappable fan trays. Each fan tray features individual
fans that pull air through the chassis from front to back or back to front.

Introducing the Switches |17
n(R8Z99A) Aruba 9300 Front-to-Back Fan
n(R9A00A) Aruba 9300 Back-to-Front Fan
In the event of a single fan tray missing, misconfigured airflow direction, and/or faulted fans, the switch will try to
maintain adequate cooling by increasing fan speeds and/or disabling misconfigured devices. If adequate cooling
cannot be maintained, the switch will reboot and assess cooling capabilities.
Fan trays and power supplies installed in a 9300-32D switch must have the same cooling air flow direction. Air flow
direction in an 9300-32D switch is not controlled by software. To change the air flow direction, replace the power
supplies and fan trays with power supplies and fan tray units supporting the air flow direction you require.
The system will automatically shut down if overheating is detected. If fewer than 6 working fan trays are detected,
the Global status and fan LEDs on the front of the switch and the corresponding Fan tray LEDs will FLASH amber.
If one fan tray is missing for more than two minutes the system will shut down. If two or more fan trays are missing,
faulted and/or misconfigured the system will reboot to reassess cooling capabilities.
System airflow direction is configured automatically at system initialization and cannot be reconfigured by the user.
System airflow direction is determined by the power supply type installed in PS1 at initialization time (or PS2 if PS1
is absent or faulted). Any Fan tray or Power supply of conflicting airflow type will be disabled by the system. Ensure
only matching Fan trays and Power supplies are used at any given runtime.
Figure 1 Aruba 9300-32D fan trays

HPE Aruba Networking 9300-32D Switch Series | Installation and Getting Started Guide 18
The switch can tolerate the failure of a single fan tray while maintaining a safe operating temperature. The
switch may continue to operate with one failed fan tray. If the switch reaches a critical temperature
condition, the switch will shut down. For best operation, the failed fan tray should be replaced as soon as
possible.
If one fan tray has failed, the Global status, Failed Fan tray LED and the Fan LEDon the front of the switch
will FLASH amber.
If multiple fan trays have failed, the switch will reboot and reassess cooling capabilities.
The Aruba 9300-32D switch is not compatible with fan trays from other Aruba hardware platforms.
Fan Tray Status LED
Fan tray LED Function State Meaning
Status LED To display fan tray
status.
ON green The fan tray is operating normally
FLASH amber (OS-
CX)
The fan tray is faulted by the system
due to a failed fan, insertion of an illegal
fan tray or other fault.
All fault events that occur in OS-CX will
correspond to a warning available in
the Event Log.
Use the show environment fan command for fan tray status information. (See the Fundamentals Guide
for your switch).
Switch Features
The features of the 9300-32D switches include:
nQSFP-DD, QSFP28, SFP28, SFP+.
oFor a secure environment, all ports are disabled by default.
nDual power supplies: Adding a second power supply provides redundant system power. If one of the
power supplies fails, the second power supply continues to provide the power necessary to keep the
switch running. The Global Status LED and PS1/PS2 LED flashes Amber when 1 PSU at fault state.
nEasy management of the switch through several available interfaces:
oCommand line interface: A full-featured, easy-to-use, VT-100 terminal interface for out-of-band
switch management.
oWeb browser interface: An easy-to-use built-in graphical interface that can be accessed from
common web browsers.
nSupport for up to 4094 IEEE 802.1Q-compliant VLANs so you can divide the attached end nodes into
logical groupings that fit your business needs.
nSupport for many advanced features to enhance network performance: For a description, see the OS-CX
guides for your switch.
nAbility to update the switch software. To download product updates, go to the Aruba Support Portal.

Chapter 3
Installing the switch
Installing the switch
The following sections show how to install the switch. For mounting options, see Mount the Switch on page
23 or contact your Aruba representative or Aruba authorized reseller.
Included Parts
The 9300-32Dswitch is shipped with the following components:
nDocumentation kit
nJL482C, Aruba Universal 2-Post Rack Mount Kit
nPower cord: The following (part number or J-number/SKU) are orderable through Aruba purchasing. Two
power cords are required per switch.
Argentina 8121-0729 J9891A Israel 8121-1004 J9899A
Australia/New Zealand 8121-0837 J9883A Japan 8121-1143 J9893A
Brazil 8121-1071 J9894A Switzerland 8121-0738 J9898A
Chile 8121-0735 J9886A South Africa 8121-0737 J9897A
China 8121-0943 J9890A Taiwan 8121-0964 J9887A
Continental Europe/South Korea 8121-0731 J9885A Philippines/Thailand 8121-0734 J9895A
Denmark 8121-0733 J9888A UK/Hong
Kong/Singapore/Malaysia
8121-0739 J9884A
India 8121-0564 J9892A US/Canada/Mexico 8121-1141 J9896A
NA Hi-Voltage (non-locking) C13
to NEMA 6-20
8120-3996 J9936A PDU NA/Japan/TW/Rest of
World
142263-001 JL697A
PDU India-only P09371-001 JL671A
Installation Procedures for 9300-32D Switches
1. Prepare the Installation Site on page 21
2. Install Power Supplies on page 21
3. Install Fan Trays on page 22
4. Power-on the switch and check LEDs on page 23
5. Power off the switch on page 23
HPE Aruba Networking 9300-32D Switch Series | Installation and Getting Started Guide
19

Installing the switch |20
6. Mount the Switch on page 23
7. Install Transceivers on page 30 (optional)
8. Connect the Switch to a Power Source on page 31
9. Setup for Initial Configuration on page 32
Installation Precautions and Guidelines
To help avoid personal injury or product damage when installing your switch, read the following installation
precautions and guidelines.
nCAUTION
nDo not mount the switch on a wall, under a table, or under any other horizontal surface.
nMount devices installed in a rack or cabinet as low as possible. Put the heaviest devices at the bottom and
progressively lighter devices positioned higher.
nTo prevent the rack or cabinet from becoming unstable and/or falling over, ensure that it is adequately secured.
nThe switch may use more than one power supply cable. To fully power down the switch, you must disconnect all
power supply cables from the switch.
nWARNING
nDo not ship any switch in a rack without checking for restrictions in the latest Aruba Installation and Getting
Started Guide. Otherwise, you may void the switch warranty.
nEnsure the power source circuits are properly grounded, then connect the switch to the power source by using
the power cord supplied with the switch. For more information on power cords, see Power Cords on page 46.
nWhen installing the switch, the AC outlet should be near the switch and be easily accessible in case the switch
must be powered off.
nEnsure that the power cord and network cables at the switch mounting location do not create a tripping hazard.
nDo not install the switch in an environment where the operating ambient temperature exceeds its specification.
See the environmental operating temperature information in the Environmental Specifications on page 46
section of this guide.
nEnsure that the switch does not overload the power circuits, wiring, and over-current protection. To determine
the possibility of overloading the supply circuits, add the ampere ratings of all devices installed on the same
circuit as the switch. Then compare the total with the rating limit for the circuit. The maximum ampere ratings
for a device are usually printed near the device AC power connectors.
nDo not block any ventilation openings on the front or rear of the switch.
nLeave a minimum of 6 inches (15.24 cm) for cooling at the front and back of the switch. For the air flow direction,
see the Fan Trays on page 16 section of this guide.
nIf a power supply or fan tray must be removed and reinstalled, wait at least 5 seconds before reinstallation.
Otherwise, damage to the switch may occur. The power supply needs this time to discharge any retained power.