H3C S5170-EI Series User manual

i
Contents
1 Preparing for installation··········································································1-1
Safety recommendations ································································································································1-2
Examining the installation environment ··········································································································1-2
Cleanliness··············································································································································1-4
Corrosive gas limit···································································································································1-4
Examining the installation site·························································································································1-5
Checking power distribution or power supply environment·············································································1-6
Laser safety·····················································································································································1-6
Installation tools ··············································································································································1-7
Installation accessories···································································································································1-7
2 Installing the switch··················································································2-1
Installing the switch in a 19-inch rack··············································································································2-2
Installation methods································································································································2-2
Installation procedure at a glance···········································································································2-3
Rack-mounting the switch by using front mounting brackets··································································2-3
Rack-mounting the switch by using front and rear mounting brackets····················································2-6
Mounting the switch on a workbench··············································································································2-9
Grounding the switch ······································································································································2-9
Grounding the switch by using a grounding strip··················································································2-10
Grounding the switch by using a grounding conductor buried in the earth ground·······························2-11
Verifying the connection after grounding the switch··············································································2-12
Installing and removing a power supply········································································································2-12
Installing a CA-70A12, PSR75-12A, or PSR150-D1 power supply·······················································2-13
Removing a CA-70A12, PSR75-12A, or PSR150-D1 power supply·····················································2-14
Installing a PSR180-56A, PSR360-56A, PSR560-56D, PSR720-56A, or PSR1110-56A power supply
······························································································································································2-15
Removing a PSR180-56A, PSR360-56A, PSR560-56D, PSR720-56A, or PSR1110-56A power supply
······························································································································································2-16
Connecting the power cord···························································································································2-17
Connecting the power cord for a built-in power supply·········································································2-18
Connecting the power cord for a CA-70A12 or PSR75-12A power supply···········································2-18
Connecting the power cord for a PSR150-D1 or PSR560-56D power supply······································2-20
Connecting the power cord for a PSR180-56A, PSR360-56A, PSR720-56A, or PSR1110-56A power
supply····················································································································································2-21
Verifying the installation································································································································2-21
3 Accessing the switch for the first time······················································3-1
Connecting the switch to a configuration terminal···························································································3-1
Connecting a DB9-to-RJ45 console cable······························································································3-2
Connecting a USB-to-RJ45 console cable······························································································3-3
Setting terminal parameters····························································································································3-4
Starting the switch···········································································································································3-4
Pre-start checklist····································································································································3-4
Powering on the switch···························································································································3-5
4 Setting up an IRF fabric···········································································4-1
IRF fabric setup flowchart ·······························································································································4-1
Planning IRF fabric setup································································································································4-2
Planning IRF fabric size and the installation site·····················································································4-2
Identifying the master switch and planning IRF member IDs··································································4-2
Planning IRF topology and connections··································································································4-3
Identifying physical IRF ports on the member switches··········································································4-4
Planning the cabling scheme··················································································································4-4
Configuring basic IRF settings························································································································4-6
Connecting the physical IRF ports··················································································································4-6
Verifying the IRF fabric setup··························································································································4-6

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5 Maintenance and troubleshooting····························································5-1
Power supply failure········································································································································5-1
Built-in power supply failure····················································································································5-1
Removable power supply failure·············································································································5-1
Fan tray failure················································································································································5-2
Configuration terminal display issues··············································································································5-2
No display ···············································································································································5-2
Garbled display·······································································································································5-2

1-1
1 Preparing for installation
This document is applicable to the following Ethernet switches:
Table1-1 Switch series and models
Switch series Model Product code (PID)
S5170-EI switch series
S5170-28S-EI LS-5170-28S-EI
LS-5170-28S-EI-GL
S5170-54S-EI LS-5170-54S-EI
LS-5170-54S-EI-GL
S5170-54S-EI-DP LS-5170-54S-EI-DP
S5170-28S-HPWR-EI LS-5170-28S-HPWR-EI
LS-5170-28S-HPWR-EI-GL
S5170-54S-PWR-EI LS-5170-54S-PWR-EI
LS-5170-54S-PWR-EI-GL
S5170-36F-EI LS-5170-36F-EI
S5170-36F-EI-DP LS-5170-36F-EI-DP
S5570S-EI switch series
S5570S-28S-EI LS-5570S-28S-EI
LS-5570S-28S-EI-GL
S5570S-54S-EI LS-5570S-54S-EI
LS-5570S-54S-EI-GL
S5570S-28S-HPWR-EI LS-5570S-28S-HPWR-EI
S5570S-54S-PWR-EI LS-5570S-54S-PWR-EI
S5570S-36F-EI LS-5570S-36F-EI
LS-5570S-36F-EI-GL
S5570S-54F-EI LS-5570S-54F-EI
LS-5570S-54F-EI-GL
S5570S-30MS-UPWR-EI LS-5570S-30MS-UPWR-EI
NOTE:
•
Switches of the same model but different PIDs might differ in hardware and software features.
You can view the PID of a switch on the label located on its rear panel or top panel.
•
The available chassis models and accessories vary by country and region. This document
describes only the preceding models. For the chassis models and accessori
es available in your
country or region, contact the local H3C marketing personnel.

1-2
Safety recommendations
To avoid any equipment damage or bodily injury caused by improper use, read the following safety
recommendations before installation. Note that the recommendations do not cover every possible
hazardous condition.
•
Before cleaning the switch, remove all power cords from the switch. Do not clean the switch
with wet cloth or liquid.
•
Do not place the switch near water or in a damp environment. Prevent water or moisture from
entering the switch chassis.
•
Do not place the switch on an unstable case or desk. The switch might be severely damaged in
case of a fall.
•
Ensure good ventilation of the equipment room and keep the air inlet and outlet vents of the
switch free of obstruction.
•
Make sure the power input voltage is as required by the power supply.
•
To avoid electrical shocks, do not open the chassis while the switch is operating or when the
switch is just powered off.
•
During switch installation, wear an ESD wrist strap. Make sure the strap makes good skin
contact and is reliably grounded.
Examining the installation environment
To ensure correct operation of your switch, make sure the installation environment meets the
requirements listed in Table1-2.
Table1-2 Checking list for the installation environment
Item Requirements
Ventilation and heat dissipation
CAUTION:
To ensure correct operation of your device, make sure the installation
environment is adequately ventilated to prevent the switch from
overheating.
•Ensure a minimum clearance of 10 cm (3.94 in) around the chassis.
•Do not install the device near a heat source, for example, a stove or
heater.
•Ensure air ventilation in the installation environment.
•Do not block the ventilation holes in the device or power adapter.
Anti-moisture
CAUTION:
Water or moisture might damage the circuits of the device.
•Do not place the device near water or in a damp environment.
•Install the switch in a clean, dry, and ventilated place where
temperature is controlled in a stable range.
•Make sure
the installation environment is free from waterleakage or
condensat
ion. If required, install a dehumidification device (such as
an air conditioner with a dehumidification function or a dedicated
dehumidifier).
•Do not operate the device under or near the water source, such as
the wash basin, laundry room, or areas with high humidity.
•Do not touch the device with wet hands.
Temperature/humidity For correct operation and long service life of your switch, maintain the
temperature and humidity in the equipment room at acceptable ranges.

1-3
Item Requirements
•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 cause issues including loose mounting screws and circuit
failure.
•High temperature can accelerate the aging of insulation materials
and significantly lower the reliability and lifespan of the switch.
For the temperature and humidity requirements of the switch, see
technical specifications in S5170-EI & S5570S-EI Switch Series
Hardware Information and Specifications.
Lightning protection
CAUTION:
Ground the switch correctly and verify the grounding. For more
information, see "Grounding the switch."
•If you ground the switch by using a grounding strip, make sure the
grounding resistance of the grounding strip in the equipment roomis
less than 1Ω.
•If you ground the switch by using a grounding conductor buried in
the earth ground, make sure the grounding resistance of the
grounding conductor in the ground is less than 10Ω.
•Route the signal cables along indoor walls, bury the cables in the
earth ground, or thread the cables through steel tubes. Install a
signal lightning arrester with a nominal discharge current for a
corresponding network interface.
•Keep the signal cables far from power cords and lightning rod down
conductors.
•As a best practice, route power cords indoors. If anAC power cord
is routed from outdoors, connect theAC power cord first to a power
lightning arrester before leading it to theAC power port on the
switch. Make sure the power lightning arrester has a nominal
discharge current and the total length of the power cord from the
power lighting arrester to the power port on the switch is less than 5
m (16.40 ft).
•
Ground the switch, rack, independent power supplies, and lightning
arresters separately.
•You must ground optical fibers with reinforcing metal stiffener from
outdoors on an optical distribution frame (ODF) or fiber splice
enclosure.
Cable routing
CAUTION:
Do not run an Ethernet cable and power cord in parallel.
•Route different types of cables separately.
•Keep power cords a minimum of 5 cm (1.97 in) away from other
cables.
ESD prevention
•Ground the switch correctly.
•To avoid ESD damage to the device or FRUs, always wear an ESD
wrist strap when you install or remove the device or FRUs.
•Make sure the wrist strap has good skin contact and is reliably
grounded.
Cleanliness For more information, see "Cleanliness."
Corrosive gas prevention The installation site must be free from corrosive gases such as acid gases and alkaline gases. For more information, see "Corrosive gas
limit."
EMI •If AC power is used, use a single-phase three-wire power receptacle

1-4
Item Requirements
with protection earth (PE) to filter interference from the power grid.
•Keep the device far away from radio transmitting stations, radar
stations, and high-frequency devices.
•Use electromagnetic shielding, for example, shielded interface
cables, when necessary.
Cleanliness
Dust buildup on the chassis might cause electrostatic adsorption and dust corrosion, resulting in
poor contact of metal connectors and contact points. This might shorten the device's lifetime and
even cause device failure in the worst case. Table1-3 describes the switch requirement for
cleanliness.
Table1-3 Switch requirement for cleanliness
Substance Particle diameter Concentration limit
Dust particles ≥ 0.5 µm ≤ 1.8 × 107particles/m3
To maintain cleanliness in the equipment room, follow these guidelines:
•
Keep the equipment room away from pollution sources. Do not smoke, eat, or drink in the
equipment room.
•
Use double-layer glass in windows and seal doors and windows with dust-proof rubber strips.
Use screen doors and window screens for doors and windows open to the outside and make
sure the external windows are air tight.
•
Use dustproof materials for floors, walls, and ceilings and use wallpaper or matt paint that does
not produce powders.
•
Clean the equipment room regularly and clean the air filters of the rack each month.
•
Wear ESD clothing and shoe covers before entering the equipment room, keep the ESD
clothing and shoe covers clean, and change them frequently.
Corrosive gas limit
Corrosive gases can accelerate corrosion and aging of metal components. Make sure the corrosive
gases do not exceed the concentration limits as shown in Table1-4.
Table1-4 Corrosive gas concentration limits
Gas Average concentration (mg/m3) Maximum concentration (mg/m3)
SO20.3 1.0
H2S 0.1 0.5
Cl20.1 0.3
HCI 0.1 0.5
HF 0.01 0.03
NH31.0 3.0
O30.05 0.1
NOX0.5 1.0

1-5
CAUTION:
As a best practice, control the
corrosive gas concentrations in the equipment room at their
average
values
. Make sure the corrosive gas concentrations do not exceed 30 minutes per day at their
maximum values.
To control corrosive gases, use the following guidelines:
•
As a best practice, do not build the equipment room in a place with a high concentration of
corrosive gases.
•
Make sure the equipment room is not connected to sewer, vertical shaft, or septic tank pipelines
and keep it far away from these pipelines. The air inlet of the equipment room must be away
from such pollution sources.
•
Use environmentally friendly materials to decorate the equipment room. Avoid using organic
materials that contains harmful gases, such as sulfur or chlorine-containing insulation cottons,
rubber mats, sound-proof cottons, and avoid using plasterboards with high sulfur concentration.
•
Place fuel (diesel or gasoline) engines separately. Do not place them in the same equipment
room with the device. Make sure the exhausted air of the engines will not flow into the
equipment room or towards the air inlet of the air conditioners.
•
Place batteries separately. Do not place them in the same room with the device.
•
Employ a professional company to monitor and control corrosive gases in the equipment room
regularly.
Examining the installation site
Before you install the switch, verify that the installation site meets the installation requirements. The
switch can operate correctly in an A1 or A2 installation site. Availability issues might occur if you
install the switch in an A3, B1, B2, or C installation site.
Table1-5 Installation sites
Category Definition Example
A1: indoor controlled
environment
•Indoor environments where
temperature and humidity are
controlled.
•Completely enclosed or shielded
indoor environments.
Central equipment rooms, IDC
equipment rooms, mobile cabins
with air conditioners, outdoor air
conditioner cabinets, and heat
exchanger cabinets.
A2: indoor partially
controlled
environment
•Indoor environments where
temperature and humidity are partially
controlled.
•Incompletely enclosed or shielded
places.
•Places far from pollution sources.
Simple equipment rooms, ordinary
houses, garages, corridors, and
direct ventilation cabinets far from
pollution sources, houses without
direct exposure to sunlight or rain,
railway station platforms, and
stadiums.
A3: indoor
uncontrolled
environment
•Indoor environments where
temperature and humidity are
uncontrolled.
•Incompletely enclosed or shielded
places.
•Places near pollution sources.
Simple equipment rooms, ordinary
houses, garages, corridors, and
direct ventilation cabinets near
pollution sources, houses without
direct exposure to sunlight or rain,
railway station platforms, stadiums,
uncleaned rooms after decoration,
and rooms under decoration.
B1: outdoor general
environment
•Unshielded places where the
temperature and humidity are not
controlled.
•Places far from pollution sources.
Completely exposed outdoor places
far from pollution sources.

1-6
Category Definition Example
B2: harsh
environment
•Unshielded places where the
temperature and humidity are not
controlled.
•Sea environments or outdoor land
environments near pollution sources.
Islands, ships, and completely
exposed outdoor places near
pollution sources.
C: special
environments Special application environments Buried, underwater, or undersea
environments and manholes.
Table1-6 Pollution sources
Category Radius range
Saline water areas such as oceans and saline lakes ≤3.7 km (2.30 miles)
Serious pollution sources suchas metallurgic plants,coal mines, and
heat and power plants ≤3 km (1.86 miles)
Medium pollution sources
such as chemical factories, rubber plants,
and electroplating factories ≤2 km (1.24 miles)
Light pollution sources, such as food factories, tanneries, and
heating boilers ≤1 km (0.62 miles)
Checking power distribution or power supply
environment
Table1-7 Requirements for power distribution or power supply environment
Item Requirements
Preparation The power supply must be available before you install the switch.
Voltage The voltage provided to the switch must be within the operating voltage range.
For the operating voltage range, see S5170-EI & S5570S-EI Switch Series
Hardware Information and Specifications.
Power receptacle and
cables
•If the externalpower supply system provides an AC power outlet, prepare a
country-specificAC power cord yourself. Make sure the PE wire of the AC
power supply is grounded reliably.
•
If the externalpowersupplysystem providesa DC distribution box, prepare
DC power cords yourself.
•Do not use the power cord provided with the switch on other devices.
Laser safety
WARNING
!
The switch is Class 1 laser device.
Disconnected optical fibers or transceiver modules might emit
invisible laser light. Do not stare into beams or view directly with optical instruments when the switch
is operating.

1-7
Installation tools
No installation tools are provided with the switch. Prepare the following tools yourself as required:
•
ESD wrist strap
•
Flat-blade screwdriver
•
Phillips screwdriver
•
Needle-nose pliers
•
Marker
Installation accessories
Before installation, make sure you have all the required installation accessories. If an installation
accessory is damaged or lost, purchase a new one by using the BOM code in Table1-8.
Table1-8 Installation accessories
Code Description Quantity Applicable device models
N/A
Front mounting kit, including a
pair of front mounting brackets
and eight M4 screws
1 pair,
provided All models
N/A
Rear mounting bracket kit,
including a pair of rear mounting
brackets and two shoulder
screws
1 pair,
provided
S5570S-28S-HPWR-EI
S5570S-54S-PWR-EI
S5570S-30MS-UPWR-EI
N/A M6 screw and cage nut User supplied All models
N/A
Rubber feet
Four, provided All models
N/A
Grounding cable
1, provided All models
N/A Grounding screw 1, provided All models
N/A Power module filler panel 1, provided S5570S-28S-EI S5570S-54S-EI
S5570S-36F-EI

1-8
Code Description Quantity Applicable device models
S5570S-54F-EI
N/A
Power module filler panel
1, provided S5570S-28S-HPWR-EI S5570S-54S-PWR-EI
S5570S-30MS-UPWR-EI
N/A
AC power cord
The appearance and parameters
for AC power cords vary
depending on countries and
regions. The AC power cord in
this table is a standard AC power
cord in China.
1, provided for
the switch with
a built-in
power supply
1, provided
with
removable
power supplies
All models
N/A
DC power cord
1, provided
with DC power
supplies S5570S-EI series
N/A
AC power cord bail latch
The appearance of the bail latch
might differ.
1, provided
with the
CA-70A12 and
PSR75-12A
power supplies
S5570S-28S-EI
S5570S-54S-EI
S5570S-36F-EI
S5570S-54F-EI
04042967
DB9-to-RJ45 console cable
1, optional All models
0404A1EE
USB-to-RJ45 console cable
1, optional All models

2-1
2 Installing the switch
CAUTION:
Keep the tamper
-
proof seal on a mounting screw on the chassis cover intact, and if you want to open
the chassis, contact H3C for permission. Otherwise, H3C shall not be liable for any consequence.
Figure2-1 Hardware installation flow
Start
Install the switch
Ground the switch
Connect thepower cords
Verify the installation
Turn on circuit breakers
Operating correctly?Turn off the
circuit breakers
Troubleshoot
Yes
No
End
Connect ports and cables
Removable power
supplies?
No
Yes
Install power supplies

2-2
Installing the switch in a 19-inch rack
Installation methods
Table2-2 Installation methods
Applicable
switch models Installation method Requirements and guidelines Installation procedure
S5170-28S-EI
S5170-54S-EI
S5170-54S-EI-DP
S5170-28S-HPW
R-EI
S5170-54S-PWR-
EI
S5170-36F-EI
S5170-36F-EI-DP
S5570S-28S-EI
S5570S-54S-EI
S5570S-36F-EI
S5570S-54F-EI
Using front
mounting brackets
Select an installation position for
the front mounting brackets as
required: near the power supply
side or port side. For the
S5170-28S-EI, S5170-54S-EI,
S5170-36F-EI, and
S5170-36F-EI-DP switches, the
front mounting brackets can be
installed only near the port side.
See "Rack-mounting the
switch by using front
mounting brackets."
S5570S-28S-HP
WR-EI
S5570S-54S-PW
R-EI
S5570S-30MS-U
PWR-EI
Using front and
rear mounting
brackets
•Select an installation position
for the front mounting
brackets as required: near the
power supply side or port
side.
•Install the rear mounting
brackets based on the rack
depth (distance between the
front and rear rack posts).
If the rack depth is in the
range of 429 to 595 mm
(16.89 to 23.43 in), orient
the rear mounting
brackets with the wide
flange inside the rack.
If the rack depth is in the
range of 274 to 440 mm
(10.79 to 17.32 in) and the
distance from the rear
rack posts to the inner
surface of the cabinet
door is greater than 153
mm (6.02 in), orient the
rear mounting brackets
with the wide flange
outside the rack.
•If you are to install a
PSR1110-56A power supply,
make sure the rack depth is
larger than 600 mm (23.62 in)
See "Rack-mounting the
switch by using front and
rear mounting brackets."
IMPORTANT:
For the rack doors to close easily after switch installation, make sure the distance requirements

2-3
described in Table2-2 are met.
Installation procedure at a glance
Figure2-2 Procedure for installing the switch in a 19-inch rack by using front mounting
brackets
Figure2-3 Procedure for installing the switch in a 19-inch rack by using front and rear
mounting brackets
NOTE:
If a rack shelf is available, you can put the switch on the rack shelf, slide the switch to an appropriate
location, and attach the switch to the rack by using the mounting brackets.
Rack-mounting the switch by using front mounting brackets
The installation procedures are the same for the S5170-EI series and S5570S-EI series except for
the S5570S-28S-HPWR-EI, S5570S-54S-PWR-EI, and S5570S-30MS-UPWR-EI. The following
uses the S5570S-54F-EI as an example.
Attaching the front mounting brackets to the switch
For the S5170-28S-EI, S5170-54S-EI, S5170-36F-EI, and S5170-36F-EI-DP switches, you can
install front mounting brackets only at the port side.
The switch has one mounting position near the network ports and the other mounting position near
the power supplies for the front mounting brackets. Select one position as needed.
To attach the front mounting brackets to the chassis:
1. Place the wide flange of the mounting bracket against the chassis side panel. Align the
mounting bracket installation holes with the screw holes in the chassis.
To install the mounting brackets at the port-side mounting position, see Figure2-4.
To install the mounting brackets at the power supply-side mounting position, see Figure2-5.
2. Fasten the M4 screws to secure the mounting bracket to the switch. As a best practice, use a
torque of 12 kgf-cm (1.18 Nm) to fasten the M4 screws.
3. Attach the front mounting bracket to the other side of the chassis in the same way.
Attach the front
mounting brackets to
the switch
Select an installation position
for the front mounting brackets
(near the port side or power supply side) Mount the switch
in the rack
Attach the front
mounting
brackets to the
switch
Attach the
shoulder
screws to the
switch
Attach the
rear mounting
brackets to
the rack
Select an installation position
for the front mounting brackets
(near the port side or power
supply side)
Mount the
switch in the
rack

2-4
Figure2-4 Attaching the front mounting brackets to the port-side mounting position
Figure2-5 Attaching the front mounting brackets to the power supply-side mounting position
Mounting the switch in the rack
This task requires two people.
To mount the switch in the rack:
1. Wear an ESD wrist strap and make sure it makes good skin contact and is reliably grounded.
2. Verify that the front mounting brackets have been securely attached to the switch chassis. See
"Attaching the front mounting brackets to the switch."
3. Attach cage nuts to the front rack posts.
4. One person supports the bottom of the switch, and moves the switch to an appropriate
position based on the installation positions of the front mounting brackets.
5. Another person uses user supplied M6 screws and cage nuts to attach the mounting brackets
to the rack and verifies that the brackets are level and secure. As a best practice, use a torque
of 30 kgf-cm (2.94 Nm) to fasten the M6 screws.

2-5
Figure2-6 Mounting the switch in the rack (port-side mounting position for the front
mounting brackets)
Figure2-7 Mounting the switch in the rack (power supply-side mounting position for the front
mounting brackets)

2-6
Rack-mounting the switch by using front and rear mounting
brackets
The installation procedures are the same for the S5570S-28S-HPWR-EI, S5570S-54S-PWR-EI, and
5570S-30MS-UPWR-EI. The following uses the S5570-28S-HPWR-EI as an example.
Attaching the front mounting brackets and shoulder screws to the switch
The switch provides two installation positions on its side for the front mounting brackets. One is near
the power supply side and one is near the port side. The following procedure attaches the front
mounting brackets to the installation position near the port side. The power supply-side mounting is
similar.
To attach the front mounting brackets and shoulder screws to the switch:
1. Wear an ESD wrist strap. Make sure the strap makes good skin contact and is reliably
grounded.
2. Align the round holes in the wide flange of one front mounting bracket with the screw holes in
the chassis. See Figure2-8.
3. Use M4 screws (supplied with the switch) to attach the mounting bracket to the chassis. As a
best practice, use a torque of 12 kgf-cm (1.18 Nm) to fasten the M4 screws.
4. Repeat the preceding two steps to attach the other mounting bracket to the chassis.
5. Unpack the shoulder screws and attach them to the chassis. As a best practice, use a torque
of 12 kgf-cm (1.18 Nm) to fasten the shoulder screws.
Two installation positions as red-marked in Figure2-8 are available for shoulder screws. Select
one as required.
Figure2-8 Attaching the front mounting brackets and shoulder screws to the chassis
Attaching the rear mounting brackets to the rack
1. Determine the switch installation position in the rack.
2. Install cage nuts (user-supplied) in the rear rack posts. Make sure the corresponding cage
nuts on the left and right rear rack posts are at the same height.
3. Orient the rear mounting brackets with the wide flange inside or outside the rack as required.
4. Use M6 screws (user-supplied) to attach the rear mounting brackets to the rear posts, as
shown in Figure2-9. As a best practice, use a torque of 30 kgf-cm (2.94 Nm) to fasten the M6
screws.
Do not fully tighten the M6 screws before mounting the switch in the rack.

2-7
Figure2-9 Attaching the rear mounting brackets to the rack with the wide flange inside the
rack
Figure2-10 Attaching the rear mounting brackets to the rack with the wide flange outside the
rack
Mounting the switch in the rack
1. Wear an ESD wrist strap. Make sure the strap makes good skin contact and is reliably
grounded.

2-8
2. Make sure the front mounting brackets and shoulder screws are securely attached to the two
sides of the switch.
3. Attach cage nuts to the front rack posts. Make sure the corresponding cage nuts on the left
and right front rack posts are at the same height.
4. One person supports the chassis bottom with one hand, holds the front part of the chassis with
the other, and pushes the chassis into the rack gently. Make sure the shoulder screws rest
firmly on the upper edge of the rear mounting brackets. See Figure2-11 and Figure2-12.
5. The other person attaches the front mounting brackets by using M6 screws and cage nuts to
the front rack posts. Make sure the switch is installed securely in the rack. See Figure2-11 and
Figure2-12. As a best practice, use a torque of 30 kgf-cm (2.94 Nm) to fasten the M6 screws.
Figure2-11 Mounting the switch in the rack (with the wide flange of the rear mounting
brackets inside the rack)

2-9
Figure2-12 Mounting the switch in the rack (with the wide flange of the rear mounting
brackets outside the rack)
Mounting the switch on a workbench
IMPORTANT:
•
Reserve a minimum clearance of 10 cm (3.9 in) around the chassis for heat dissipation.
•Do not place heavy objects on the switch.
To mount the switch on a workbench:
1. Verify that the workbench is sturdy and reliably grounded.
2. Place the switch with bottom up, and clean the round holes in the chassis bottom with dry
cloth.
3. Attach the rubber feet to the four round holes in the chassis bottom.
4. Place the switch with upside up on the workbench.
Grounding the switch
WARNING
!
•
Correctly connecting the grounding cable is crucial to lightning protection and ESD and EMI
protection. You must connect the grounding cable correctly and reliably for the switch.
•
For information about lightning protection for the switch, see H3C Network Devices Lightning
Protection Guide.
The power input end of the switch has a noise filter, whose central ground is directly connected to the
chassis to form the chassis ground (commonly known as PGND). You must securely connect this

2-10
chassis ground to the earth to minimize the potential for system damage, maximize the safety at the
site, and minimize EMI susceptibility of the system.
Select a grounding method based on the installation environment.
NOTE:
The power and grounding terminals in this section are for illustration only.
Grounding the switch by using a grounding strip
CAUTION:
•
Connect the grounding cable to the grounding strip
in the equipment room. Do not connect it to a
fire main or lightning rod.
•
To guarantee the grounding effect and avoid switch damage, use the grounding cable provided
with the switch to connect the switch to a grounding strip in the equipment room.
If a grounding strip is available at the installation site, use the grounding cable provided with the
switch to connect the switch to the grounding strip.
Connecting the grounding cable to the chassis
1. Remove the grounding screw from the grounding hole in the chassis.
2. Use the grounding screw to attach the ring terminal of the grounding cable to the grounding
screw hole. Fasten the screw. As a best practice, use a torque of 5 kgf-cm (0.49 Nm) to fasten
the grounding screw.
IMPORTANT:
Orient the grounding cable as shown in
Figure2-13 so that you can easily install or remove
the
removable components.
Figure2-13 Connecting the grounding cable to the chassis
(1) Grounding screw
(2) Ring terminal
(3) Grounding sign
(4) Grounding hole
(5) Grounding cable