NSFOCUS NFNX3 Series User manual

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NSFOCUS NFNX3 Firewall Series
Installation Guide
NSFOCUS Technologies, Inc.
Document version: 6W100-20230111

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■ Copyright © 2022 NSFOCUS Technologies, Inc. All rights reserved.
Unless otherwise stated, NSFOCUS Technologies, Inc. holds the copyright for the content of this document,
including but not limited to the layout, figures, photos, methods, and procedures, which are protected under the
intellectual property and copyright laws. No part of this publication may be reproduced or quoted, in any form
or by any means, without prior written permission of NSFOCUS Technologies, Inc.

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Preface
This document describes the installation procedure for the NSFOCUS NFNX3 Firewall Series It
covers preparing for installation, installing the firewall, accessing the firewall, hardware replacement,
hardware management and maintenance, and troubleshooting.
This preface includes the following topics about the documentation:
•
Audience.
•
Conventions.
Audience
This documentation is intended for:
•
Network planners.
•
Field technical support and servicing engineers.
•
Network administrators.
Conventions
The following information describes the conventions used in the documentation.
Command conventions
Convention
Description
Boldface Bold text represents commands and keywords that you enter literally as shown.
Italic Italic text represents arguments that you replace with actual values.
[ ] Square brackets enclose syntax choices (keywords or arguments) that are optional.
{ x | y | ... }
Braces enclose a set of required syntax choices separated by vertical bars, from which
you select one.
[ x | y | ... ]
Square brackets enclose a set of optional syntax choices separated by vertical bars,
from which you select one or none.
{ x | y | ... } *
Asterisk marked braces enclose a set of required syntax choices separated by vertical
bars, from which you select a minimum of one.
[ x | y | ... ] *
Asterisk marked square brackets enclose optionalsyntaxchoices separated by vertical
bars, from which you select one choice, multiple choices, or none.
&<1-n> The argument or keyword and argument combination before the ampersand (&) sign
can be entered 1 to n times.
# A line that starts with a pound (#) sign is comments.
GUI conventions
Convention
Description
Boldface Window names, button names, field names, and menu items are in Boldface. For
example, the New User window opens; click OK.
> Multi-level menus are separated by angle brackets. For example, File > Create >
Folder.

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Symbols
Convention
Description
WARNING!
An alert that calls attention to important information that if not understood or followed
can result in personal injury.
CAUTION:
An alert that calls attention to important information that if not understood or followed
can result in data loss, data corruption, or damage to hardware or software.
IMPORTANT:
An alert that calls attention to essential information.
NOTE:
An alert that contains additional or supplementary information.
TIP:
An alert that provides helpful information.
Network topology icons
Convention
Description
Represents a generic network device, such as a router, switch, or firewall.
Represents a routing-capable device, such as a router or Layer 3 switch.
Represents a generic switch, such as a Layer 2 or Layer 3 switch, or a router that
supports Layer 2 forwarding and other Layer 2 features.
Represents an access controller, a unified wired-WLAN module, or the access
controller engine on a unified wired-WLAN switch.
Represents an access point.
Represents a wireless terminator unit.
Represents a wireless terminator.
Represents a mesh access point.
Represents omnidirectional signals.
Represents directional signals.
Represents a security product, such as a firewall, UTM, multiservice security
gateway, or load balancing device.
Represents a security module, such as a firewall, load balancing, NetStream, SSL
VPN, IPS, or ACG module.
Examples provided in this document
Examples in this document might use devices that differ from your device in hardware model,
configuration, or software version. It is normal that the port numbers, sample output, screenshots,
and other information in the examples differ from what you have on your device.
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T
T
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Contents
1 Preparing for installation·············································································1
Safety recommendations ···································································································································1
Safety symbols···········································································································································1
General safety recommendations··············································································································1
Electrical safety··········································································································································2
Laser safety················································································································································2
Handling safety ··········································································································································2
Examining the installation site····························································································································3
Weight support···········································································································································3
Temperature and humidity·························································································································3
Cleanliness·················································································································································3
Cooling system···········································································································································4
ESD prevention··········································································································································5
EMI·····························································································································································5
Lightning protection····································································································································5
Power supply··············································································································································6
Installation tools ·················································································································································6
Accessories························································································································································6
Pre-installation checklist·····································································································································7
2 Installing the firewall ···················································································9
Installation flow···················································································································································9
Mounting the firewall on a workbench··············································································································10
Installing the firewall in a standard 19-inch rack ······························································································10
Rack-mounting the firewall by using front mounting brackets··································································11
Rack-mounting the firewall by using front and rear mounting brackets ···················································12
Grounding the firewall······································································································································15
Grounding the firewall with a grounding strip···························································································16
Grounding the firewall with the grounding terminal on the rack·······························································16
Installing a Micro SD card································································································································17
Installing a power supply··································································································································17
Installing an interface module ··························································································································19
Installing a drive···············································································································································20
Installing a drive for an NFNX3-HDB1180 or NFNX3-HDB1480 firewall ·················································20
Installing a drive for other firewalls than the NFNX3-HDB1080, NFNX3-HDB1780, NFNX3-HDB3080, and
NFNX3-HDB3280·····································································································································20
Connecting Ethernet cables·····························································································································21
Connecting a copper Ethernet port··········································································································21
Connecting a fiber port·····························································································································21
Connecting power cords ··································································································································23
Connecting an AC power cord·················································································································23
Connecting a DC power cord···················································································································24
Connecting the power adapter for an NFNX3-HDB680 firewall·······························································25
Verifying the installation···································································································································25
3 Accessing the firewall ············································································3-26
Starting the firewall········································································································································3-26
Pre-start checking·································································································································3-26
Starting the firewall and observing the initial startup conditions····························································3-26
Logging in to the firewall ·······························································································································3-27
Logging in from the Web interface········································································································3-27
Logging in from the console port···········································································································3-28
Logging in through Telnet ·····················································································································3-28
4 Hardware replacement···········································································4-30
Replacing a power supply·····························································································································4-30
Replacing an interface module ·····················································································································4-30

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Replacing a drive ··········································································································································4-31
Replacing a drive for an NFNX3-HDB1180 or NFNX3-HDB1480 firewall·············································4-31
Replacing a drive for the NFNX3-HDB1080, NFNX3-HDB1780, NFNX3-HDB3080, or NFNX3-HDB3280
firewall···················································································································································4-32
Replacing a transceiver module····················································································································4-32
5 Hardware management and maintenance·············································5-34
Displaying detailed information about the firewall·························································································5-34
Displaying the software and hardware version information for the firewall···················································5-34
Displaying the electrical label information for the firewall··············································································5-35
Displaying the CPU usage of the firewall······································································································5-35
Displaying the memory usage of the firewall·································································································5-36
Displaying the temperature information of the firewall··················································································5-36
Displaying the operational statistics of the firewall························································································5-37
Displaying transceiver module information ···································································································5-38
Rebooting the firewall····································································································································5-38
6 Troubleshooting·····················································································6-40
Power supply failure······································································································································6-40
Configuration terminal display issue ·············································································································6-40
Password loss···············································································································································6-40
Cooling system failure···································································································································6-41
Software loading failure·································································································································6-41
7 Appendix A Chassis views and technical specifications························6-42
Chassis views···············································································································································6-42
NFNX3-HDB680····································································································································6-42
NFNX3-HDB1080··································································································································6-43
NFNX3-HDB1180/NFNX3-HDB1480····································································································6-43
NFNX3-HDB1780/NFNX3-HDB3080····································································································6-44
NFNX3-HDB3280··································································································································6-45
Interface modules··········································································································································6-46
NIC-NF-GE-SFP4 ·································································································································6-47
NIC-NF-10GE-SFPP6···························································································································6-47
Drives····························································································································································6-47
Power supplies··············································································································································6-48
AC power supplies································································································································6-48
DC power supplies································································································································6-48
Dimensions and weights·······························································································································6-49
Chassis ·················································································································································6-49
Interface modules··································································································································6-49
Drives····················································································································································6-49
Storage media···············································································································································6-50
Power consumption·······································································································································6-50
Chassis ·················································································································································6-50
Interface modules··································································································································6-50
Drives····················································································································································6-51
Power supply specifications··························································································································6-51
Port specifications·········································································································································6-51
Console port··········································································································································6-51
GE copper port······································································································································6-52
GE fiber port··········································································································································6-52
10 GE fiber port·····································································································································6-52
8 Appendix B LEDs··················································································6-53
NFNX3-HDB680············································································································································6-53
NFNX3-HDB1080··········································································································································6-53
NFNX3-HDB1180/NFNX3-HDB1480············································································································6-54
NFNX3-HDB1780, NFNX3-HDB3080, NFNX3-HDB3280 ············································································6-55
9 Appendix C Cables···············································································6-56
Console cable ···············································································································································6-56

iii
Ethernet twisted pair cable····························································································································6-57
Introduction ···········································································································································6-57
Making an Ethernet twisted pair cable··································································································6-60
Optical fiber···················································································································································6-60

1
1 Preparing for installation
This document is applicable to the following firewall models:
•
NFNX3-HDB680
•
NFNX3-HDB1080
•
NFNX3-HDB1180
•
NFNX3-HDB1480
•
NFNX3-HDB1780
•
NFNX3-HDB3080
•
NFNX3-HDB3280
Safety recommendations
To avoid any equipment damage or bodily injury, read the following safety recommendations before
installation. Note that the recommendations do not cover every possible hazardous condition.
Safety symbols
When reading this document, note the following symbols:
WARNING means an alert that calls attention to important information that if not understood or
followed can result in personal injury.
CAUTION means an alert that calls attention to important information that if not understood or
followed can result in data loss, data corruption, or damage to hardware or software.
General safety recommendations
•
Do not place the firewall on an unstable case or desk. The firewall might be severely damaged
in case of a fall.
•
Make sure the ground is dry and flat and anti-slip measures are in place.
•
Keep the chassis and installation tools away from walk areas.
•
Keep the chassis clean and dust-free.
•
Do not place the firewall near water or in a damp environment. Prevent water or moisture from
entering the firewall chassis.
•
Ensure good ventilation of the equipment room and keep the air inlet and outlet vents of the
firewall free of obstruction.
•
Make sure the operating voltage is in the required range.
•
Use a screwdriver, rather than your fingers, to fasten screws.
•
Stack devices according to the sizes of and packing symbols on the packages.

2
Figure1-1 Packing symbols
Symbol
Description
Stored with a maximum stack of n units.
Transported and stored with the arrows up.
Transported and stored with care.
Transported and stored avoiding humidity, rains and wet floor.
Electrical safety
•
Carefully examine your work area for possible hazards such as moist floors, ungrounded power
extension cables, and missing safety grounds.
•
Locate the emergency power-off switch in the room before installation. Shut the power off at
once in case accident occurs.
•
Do not work alone when the firewall has power.
•
Always verify that the power has been disconnected.
Laser safety
WARNING
!
Disconnected optical fibers or transceiver modules might emit invisible laser light. Do not stare into
beams or view directly with optical instruments when the firewall is operating.
The firewall is a Class 1 laser device.
•
Before you disconnect the fiber connector, execute the shutdown command in interface view
to disable the optical source.
•
Install dust caps to disconnected optical fiber connectors and ports on disconnected transceiver
modules to avoid damage caused by built-up dust.
•
Insert a dust plug into empty fiber ports.
Handling safety
When you move the firewall, follow these guidelines:
•
Move and unpack the firewall carefully to avoid firewall damage.
•
Unpack the firewall at least half an hour and power on the firewall at least two hours after you
move it from a place below 0°C (32°F) to the equipment room. This prevents condensation and
even damage to the firewall.
•
Use a safety hand truck when you move multiple firewalls.

3
•
Before you move the firewall, remove all cables and mounting brackets.
•
For long-distance transportation, remove all the removable components, such as power
supplies and interface modules, and package them separately, and install the filler panels
supplied with the firewall. For short-distance transportation, make sure all the removable
components are securely seated in the slots and the screws are fastened.
•
When you move or lift the firewall chassis, support the bottom of the chassis, rather than
holding any removable component. Make sure the accessories of the firewall are not lost or
damaged during firewall moving.
Examining the installation site
The firewall can only be used indoors. To make sure the firewall operates correctly and to prolong its
service lifetime, the installation site must meet the following requirements.
Weight support
Make sure the floor can support the total weight of the rack, chassis, modules, and all other
components. For more information, see "Dimensions and weights."
Temperature and humidity
Maintain appropriate temperature and humidity in the equipment room.
•
Lasting high relative humidity can cause poor insulation, electricity leakage, mechanical
property change of materials, and metal corrosion.
•
Lasting low relative humidity can cause washer contraction and ESD and bring problems
including loose captive screws and circuit failure.
•
High temperature can accelerate the aging of insulation materials and significantly lower the
reliability and lifespan of the firewall.
For the temperature and humidity requirements of the firewall, see Table1-1.
Table1-1 Temperature/humidity requirements
Temperature
Relative humidity
•Operating:
Without drives: 0°C to 45°C (32°F
to 113°F)
With drives: 5°C to 40°C (41°F to
104°F)
•Storage: –40°C to +70°C (–40°F to
+158°F)
•Operating:
Without drives: 5% to 95%, noncondensing
With drives: 10% to 90%, noncondensing
•Storage: 5% to 95%, noncondensing
Cleanliness
Dust buildup on the chassis might result in electrostatic adsorption, which causes poor contact of
metal components and contact points, especially when indoor relative humidity is low. In the worst
case, electrostatic adsorption can cause communication failure.
Table1-2 Dust concentration limit in the equipment room
Substance
Concentration limit (particles/m
3
)
Dust particles ≤ 3 × 104(No visible dust on desk in three days)

4
Substance
Concentration limit (particles/m
3
)
NOTE:
Dust particle diameter ≥ 5 µm
The equipment room must also meet strict limits on salts, acids, and sulfides to eliminate corrosion
and premature aging of components, as shown in Table1-3.
Table1-3 Harmful gas limits in an equipment room
Gas
Max. (mg/m
3
)
SO20.2
H2S 0.006
NH30.05
Cl20.01
NO20.04
Cooling system
For adequate cooling of the firewall, follow these guidelines:
•
Plan the firewall installation position for the airflow direction of the firewall to match the
ventilation designs at the installation site.
•
Reserve a minimum clearance of 80 mm (3.15 in) around the inlet and outlet air vents.
•
Make sure the installation site has a good cooling system.
•
When installing the firewall in a standard 19-inch rack, reserve a distance of 1U (44.45 mm, or
1.75 in) between the chassis and other devices.
The NFNX3-HDB680 and NFNX3-HDB1080 firewalls use passive cooling.
The NFNX3-HDB1180 and NFNX3-HDB1480 firewalls provide front side-intake and rear
side-exhaust airflow for heat dissipation.
The NFNX3-HDB1780, NFNX3-HDB3080, and NFNX3-HDB3280 firewalls provide left side-intake
and right side-exhaust airflow for heat dissipation.
Figure1-2 Airflow through the NFNX3-HDB1180/NFNX3-HDB1480 firewall chassis

5
Figure1-3 Airflow through the NFNX3-HDB1780/NFNX3-HDB3080/NFNX3-HDB3280 firewall
chassis
ESD prevention
To prevent electrostatic discharge (ESD), follow these guidelines:
•
Make sure the firewall, the workbench, and the rack are reliably grounded.
•
Take dust-proof measures for the equipment room. For more information, see "Cleanliness."
•
Maintain the humidity and temperature at an acceptable level. For more information, see
"Temperature and humidity."
•
Put the removed interface modules away on an ESD workbench, with the PCB upward, or put
them in ESD bags for future use.
•
Always wear ESD clothing, ESD gloves, and an ESD wrist strap.
EMI
All electromagnetic interference (EMI) sources, from outside or inside of the firewall and application
system, adversely affect the firewall in the following ways:
•
A conduction pattern of capacitance coupling.
•
Inductance coupling.
•
Electromagnetic wave radiation.
•
Common impedance (including the grounding system) coupling.
To prevent EMI, use the following guidelines:
•
If AC power is used, use a single-phase three-wire power receptacle with protection earth (PE)
to filter interference from the power grid.
•
Keep the firewall far away from radio transmitting stations, radar stations, and high-frequency
devices.
•
Use electromagnetic shielding, for example, shielded interface cables, when necessary.
•
To prevent signal ports from getting damaged by overvoltage or overcurrent caused by lightning
strikes, route interface cables only indoors. If part of the network cable of an Ethernet port must
be routed outdoors, connect a lightning arrester to the cable before you plug the cable into the
port.
Lightning protection
To protect the firewall from lightning better, follow these guidelines:
•
Make sure the grounding cable of the chassis is reliably grounded.
•
Make sure the grounding terminal of the AC power receptacle is reliably grounded.

6
•
Install a lightning arrester at the input end of the power supply to enhance the lightning
protection capability of the power supply.
Power supply
Verify that the power system at the installation site meets the requirements of the power supplies,
including the input method and rated input voltage. For more information, see "Appendix A Chassis
views and technical specifications."
Installation tools
All installation tools are user supplied.
Flat-head screwdriver Phillips screwdriver Needle-nose pliers Marker
Diagonal pliers ESD wrist strap Wire stripper Crimping tool
Accessories
NFNX3-HDB680/NF
NX3-HDB1080/NFN
X3-HDB1180/NFNX
3-HDB1480
mounting bracket
NFNX3-HDB1480,
NFNX3-HDB1780,
NFNX3-HDB3080,
NFNX3-HDB3280 mounting
brackets (including M4 shoulder
screws)
Cage nut M6 screw
M4 screw Rubber feet Grounding cable Console cable
Power adapter for
the NFNX3-HDB680
Power cord for the
NFNX3-HDB1080,
NFNX3-HDB1180,
NFNX3-HDB1480,
NFNX3-HDB1780,
NFNX3-HDB3080,
NFNX3-HDB3280
Power cord retainer

7
Pre-installation checklist
Table1-4 Checklist before installation
Item
Requirements
Result
Installation
site
Ventilation
•There is a minimum clearance of 80 mm (3.15 in)
around the inlet and outlet air vents for heat
dissipation of the firewall chassis.
•A good ventilation system is available at the
installation site.
•When installing the firewall in a standard 19-inch
rack, reserve a distance of 1U (44.45 mm, or 1.75 in)
between the chassis and other devices.
Temperature
•Operating:
Without drives: 0°C to 45°C (32°F to 113°F)
With drives: 5°C to 40°C (41°F to 104°F)
•Storage: –40°C to +70°C (–40°F to +158°F)
Relative humidity
•Operating:
Without drives: 5% RH to 95% RH,
noncondensing
With drives: 10% RH to 90% RH, noncondensing
•Storage: 5% RH to 95% RH, noncondensing
Cleanness •Dust concentration ≤ 3 × 104particles/m3
•No dust on desk within three days
ESD prevention
•The equipment, workbench, and rack are reliably
grounded.
•The equipment room is dust-proof.
•The humidity and temperature are at an acceptable
level.
•Wear an ESD wrist strap and make sure it makes
good skin contact and is reliably grounded when
installing removable components.
•Put the removed interface modules away on an ESD
workbench, with the PCB upward, or put them in ESD
bags for future use.
•Touch only the edges, instead of electronic
components when observing or moving a removed
interface module.
EMI prevention
•
Take effective measures to protect the power system
from the power grid system.
•Separate the protection ground of the firewall from
the grounding device or lightning protection
grounding device as far as possible.
•Keep the firewall far away from radio stations, radar
and high-frequency devices working in high current.
•Use electromagnetic shielding when necessary.
Lightning
protection
•The grounding cable of the chassis is reliably
grounded.
•The grounding terminal of theAC power receptacle is
reliably grounded.
•(Optional.) A power lightning arrester is installed.
Electricity safety •Equip a UPS.

8
Item
Requirements
Result
•Locate the power switch in the equipment room. In
case of emergency during operation, switch off the
power switch.
Rack-mounting
requirements
•Make sure the cabinet is equipped with a good
ventilation system.
•The rack is sturdy enough to support the weight of the
firewall and installation accessories.
•The size of the rack is appropriate for the firewall.
•The front and rearof the rack are a minimum of 0.8 m
(31.50 in) away from walls or other devices.
Safety
precautions
•The firewall is far away from any moist area and heat source.
•The emergency power switch in the equipment room is located.
Tools and
accessories
•Installation accessories supplied with the firewall
•User-supplied tools
Reference •Documents shipped with the firewall
•Online documents

9
2 Installing the firewall
WARNING!
Keep the tamper
-
proof seal on a mounting screw on the chassis cover intact, and if you want to open
the chassis, contact
NSFOCUS for permission. Otherwise, NSFOCUS shall not be liable for any
consequence.
The installation procedure is similar for the NFNX3-HDB680, NFNX3-HDB1080, NFNX3-HDB1180,
NFNX3-HDB1480, NFNX3-HDB1780, NFNX3-HDB3080, and NFNX3-HDB3280 firewalls.
The firewall appearance varies by model. The following figures are for illustration only.
Installation flow
Table2-1 Installation flow for the firewall
Step
Description
1. Start Before installation, make sure all requirements on the checklist
are met and the firewall is powered off.
2. Mounting the firewall on a
workbench Verify that the workbench is sturdy and reliably grounded.
Ensure a minimum clearance of 80 mm (3.15 in) around the air
inlet and outlet vents of the chassis.
3. Installing the firewall in a standard
19-inch rack To avoid bodily injury and device damage, use a minimum of
two people to rack-mount the firewall.
4. Grounding the firewall Before installation, make sure the firewall and rack are
grounded correctly and you wear an ESD wrist strap.
5. Installing a Micro SD card Install a Micro SD card on the firewall.
6. Installing a power supply Before you install a power supply, make sure the power supply
is not connected to any power source and the grounding cable
of the firewall is connected reliably.
7. Installing an interface module Install compatible interface modules on the firewall.
8. Installing a drive Install compatible drives on the firewall.
9. Connecting Ethernet cables The firewall provides various ports. Choose compatible
transceiver modules and cables as required. To avoid bodily
injury or device damage, read the restrictions and guidelines
carefully before connection.
10. Connecting power cords Connect compatible power cords to the power supplies.
11. Verifying the installation Verify that the firewall is installed securely and reliably
grounded, and that the power supplies are as required.

10
Mounting the firewall on a workbench
IMPORTANT:
•
Ensure good ventilation and a minimum clearance of 80 mm (3.15 in)
around the chassis for heat
dissipation.
•
Avoid placing heavy objects on the firewall.
•
To stack firewalls, make sure a minimum distance of 15 mm (0.59 in) is available between two
adjacent firewalls.
If a standard 19-inch rack is not available, you can place the firewall on a workbench.
To mount the firewall on a workbench:
1. Verify that the workbench is sturdy and reliably grounded.
2. Place the firewall upside down on the workbench and clean the four round holes in the chassis
bottom with a dry cloth.
3. Attach the four rubber feet to the round holes in the chassis bottom.
4. Place the firewall with upside up on the workbench.
Figure2-1 Mounting the firewall on a workbench
Installing the firewall in a standard 19-inch rack
WARNING
!
To avoid bodily injury and device damage, use a minimum of two persons to rack-mount the firewall.
CAUTION:
For adequate heat dissipation, ensure a minimum clearance of
80 mm (3.15 in)
around the air inlet
and outlet vents of
the chassis and a distance of 1U (44.45 mm, or 1.75 in) between the
chassis and
other devices in the rack.

11
Rack-mounting the firewall by using front mounting brackets
The NFNX3-HDB680, NFNX3-HDB1080, NFNX3-HDB1180, and NFNX3-HDB1480 firewalls
support this installation method.
To install the firewall in a standard 19-inch rack by using front mounting brackets:
1. Wear an ESD wrist strap and make sure the wrist strap makes good skin contact and is reliably
grounded.
2. Unpack the firewall and accessories.
3. Mark the cage nut installation positions on the rack posts by using the mounting brackets.
4. Install cage nuts.
Figure2-2 Installing cage nuts
5. Attach the front mounting brackets to both sides of the firewall with M4 screws provided with the
firewall.
Figure2-3 Attaching the front mounting brackets to the firewall
6. Mount the firewall in the rack. Use M6 screws to secure the mounting brackets to the front rack
posts.
1 2 3

12
Figure2-4 Mounting the firewall in the rack
Rack-mounting the firewall by using front and rear mounting
brackets
The NFNX3-HDB1780, NFNX3-HDB3080, and NFNX3-HDB3280 firewalls support this installation
method.
To install the firewall in a standard 19-inch rack:
1. Wear an ESD wrist strap and make sure the wrist strap makes good skin contact and is reliably
grounded.
2. Unpack the firewall and accessories.
3. Mark the cage nut installation positions on the rack posts by using the mounting brackets.
4. Install cage nuts.
Figure2-5 Installing cage nuts
5. Attach the front mounting brackets and shoulder screws to both sides of the firewall with M4
screws provided with the firewall.
123

13
Figure2-6 Attaching mounting brackets and shoulder screws to the firewall
6. Attach the rear mounting brackets to the rear rack posts. The rear mounting brackets can be
attached to the rear rack posts with the wide flange inside or outside the rack.
Table2-2 Installation methods for rear mounting brackets
Distance between the front and rear rack
posts
Rear mounting bracket installation
method
405 to 569 mm (15.94 to 22.40 in) With the wide flange inside the rack.
247 to 411 mm (9.72 to 16.18 in)
With the wide flange outside the rack.
Caution:
To prevent the rear mounting brackets from
obstructing the closing of the rack door, ensure a
distance greater than 153 mm (6.02 in) between
the rear rackposts and the interior side of the rack
door.