H3C S6825 Series User manual

H3C S6825 Switch Series
Installation Guide
New H3C Technologies Co., Ltd.
http://www.h3c.com
Document version: 5W100-20200810

Copyright © 2020, New H3C Technologies Co., Ltd. and its licensors
All rights reserved
No part of this manual may be reproduced or transmitted in any form or by any means without prior written
consent of New H3C Technologies Co., Ltd.
Trademarks
Except for the trademarks of New H3C Technologies Co., Ltd., any trademarks that may be mentioned in this
document are the property of their respective owners.
Notice
The information in this document is subject to change without notice. All contents in this document, including
statements, information, and recommendations, are believed to be accurate, but they are presented without
warranty of any kind, express or implied. H3C shall not be liable for technical or editorial errors or omissions
contained herein.
Environmental protection
This product has been designed to comply with the environmental protection requirements. The storage, use,
and disposal of this product must meet the applicable national laws and regulations.

Preface
H3C S6825 Switch Series Installation Guide describes the appearance, installation, power-on,
maintenance, and troubleshooting of the H3C S6825 Switch Series.
This preface includes the following topics about the documentation:
•Audience.
•Conventions.
•Documentation feedback.
Audience
This documentation is intended for:
•Network planners.
•Field technical support and servicing engineers.
•Network administrators working with the S6825 switch series.
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 optional syntax choices 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.

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.
T
T
T
T

Documentation feedback
You can e-mail your comments about product documentation to [e-mail].
We appreciate your comments.

i
Contents
1 Preparing for installation·······························································1-1
Safety recommendations··········································································································1-1
Examining the installation site····································································································1-1
Temperature/humidity ·······································································································1-1
Cleanliness·····················································································································1-2
EMI ······························································································································· 1-2
Laser safety ···················································································································· 1-3
Installation tools······················································································································ 1-3
Installation accessories ············································································································1-3
2 Installing the switch·····································································2-5
Installing the switch in a 19-inch rack ·························································································· 2-6
Accessories for switch rack-mounting ···················································································2-6
Rack-mounting procedure at a glance···················································································2-7
Chassis dimensions and rack requirements ···········································································2-7
Attaching the mounting brackets, chassis rails, and grounding cable to the chassis························2-8
Connecting the grounding cable to the chassis ····································································· 2-11
Attaching the slide rails to the rack····················································································· 2-12
Mounting the switch in the rack ························································································· 2-13
Grounding the switch by using a grounding strip·········································································· 2-15
Installing and removing a fan tray····························································································· 2-16
Installing a fan tray ········································································································· 2-16
Removing a fan tray········································································································ 2-16
Installing and removing a power supply ····················································································· 2-17
Precautions··················································································································· 2-17
Installing a power supply·································································································· 2-17
Removing a power supply································································································ 2-18
Connecting the power cord ····································································································· 2-20
Connecting the power cord for a PSR450-12A/PSR450-12A1 power supply ······························· 2-21
Connecting the power cord for a PSR450-12AHD power supply··············································· 2-21
Connecting the DC power cord for a PSR450-12D power supply·············································· 2-22
Verifying the installation·········································································································· 2-22
3 Accessing the switch for the first time············································ 3-24
Setting up the configuration environment ··················································································· 3-24
Connecting the serial console cable ··················································································· 3-24
Connecting a mini USB console cable················································································· 3-25
Setting terminal parameters······························································································ 3-27
Starting the switch················································································································· 3-27
4 Setting up an IRF fabric ····························································· 4-29
IRF fabric setup flowchart ······································································································· 4-29
Planning IRF fabric setup········································································································ 4-30
Planning IRF fabric size and the installation site···································································· 4-30
Identifying the master switch and planning IRF member IDs ···················································· 4-30
Planning IRF topology and connections··············································································· 4-31
Identifying physical IRF ports on the member switches··························································· 4-32
Planning the cabling scheme ···························································································· 4-32
Configuring basic IRF settings ································································································· 4-34
Connecting the physical IRF ports ···························································································· 4-34
Accessing the IRF fabric to verify the configuration ······································································ 4-34
5 Maintenance and troubleshooting················································· 5-35
Power supply failure ·············································································································· 5-35
Symptom······················································································································ 5-35
Solution························································································································ 5-35
Fan tray failure ····················································································································· 5-35

ii
Symptom······················································································································ 5-35
Solution························································································································ 5-35
Configuration terminal display issues ························································································ 5-35
No display on the configuration terminal·············································································· 5-35
Garbled display on the configuration terminal ······································································· 5-36
6 Appendix A Chassis views and technical specifications····················· 6-37
Chassis views ······················································································································ 6-37
S6825-54HF·················································································································· 6-37
Technical specifications·········································································································· 6-38
7 Appendix B FRUs and compatibility matrixes·································· 7-40
Power supplies····················································································································· 7-40
Fan trays····························································································································· 7-41
8 Appendix C Ports and LEDs························································ 8-42
Ports·································································································································· 8-42
Console port·················································································································· 8-42
Management Ethernet port······························································································· 8-42
USB port ······················································································································ 8-43
SFP28 port ··················································································································· 8-43
QSFP28 port················································································································· 8-46
LEDs·································································································································· 8-48
System status LED········································································································· 8-48
SFP28 port LED············································································································· 8-49
QSFP28 port LED ·········································································································· 8-49
Management Ethernet port LEDs······················································································· 8-49
Fan tray alarm LEDs······································································································· 8-50
9 Appendix D Cooling system ························································ 9-50
Index························································································ 9-52

1-1
1 Preparing for installation
This document is applicable to H3C S6825-54HF switch (BOM code: 0235A2LJ, product code:
LS-6825-54HF).
Safety recommendations
To avoid any equipment damage or bodily injury caused by incorrect 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.
•Connect the yellow-green protection grounding cable before power-on.
•Make sure the operating voltage is in the required range.
•To avoid electrical shocks, do not open the chassis while the switch is operating or when the
switch is just powered off.
•When replacing FRUs, including power supplies and fan trays, wear an ESD wrist strap to avoid
damaging the units.
Examining the installation site
The switch must be used indoors. Mount your switch in a rack and verify the following items:
•Adequate clearance is reserved at the air inlet and outlet vents for ventilation.
•The rack has a good ventilation system.
•Identify the hot aisle and cold aisle at the installation site, and make sure ambient air flows into
the switch from the cold aisle and exhausts to the hot aisle.
•Identify the airflow designs of neighboring devices, and prevent hot air flowing out of the bottom
device from entering the top device.
•The rack is sturdy enough to support the switch and its accessories.
•The rack is reliably grounded.
To ensure correct operation and longservice life of your switch, install it in an environment that meets
the requirements described in the following subsections.
Temperature/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.

1-2
•Lasting low relative humidity can cause washer contraction and ESD and cause problems
including loose 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 different switch models, see "Appendix A Chassis
views and technical specifications."
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.
Table1-1 Dust concentration limit in the equipment room
Substance Particle diameter Concentration limit
Dust particles ≥ 5 µm ≤ 3 x 104particles/m3
(No visible dust on desk in three days)
Dust (suspension) ≤75 µm ≤0.2 mg/m3
Dust (sedimentation) 75 µm to 150 µm ≤1.5 mg/(m2h)
Sand ≥ 150 µm ≤30 mg/m3
The equipment room must also meet strict limits on salts, acids, and sulfides to eliminate corrosion
and premature aging of components, as shown in Table1-2.
Table1-2 Harmful gas limits in the equipment room
Gas Maximum concentration (mg/m3)
SO20.2
H2S 0.006
NH30.05
Cl20.01
EMI
All electromagnetic interference (EMI) sources, from outside or inside of the switch and application
system, adversely affect the switch 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 switch far away from radio transmitting stations, radar stations, and high-frequency
devices.
•Use electromagnetic shielding, for example, shielded interface cables, when necessary.

1-3
•To prevent signal ports from getting damaged by overvoltage or overcurrent caused by lightning
strikes, route interface cables only indoors.
Laser safety
WARNING
!
Disconn
ected optical fibers or transceiver module
s might emit invisible laser light. Do not stare into
beams or view directly with optical instruments when the switch is operating.
The switch is a Class 1M laser device.
Installation tools
No installation tools are provided with the switch. Prepare the following tools yourself:
•Phillips screwdriver.
•Flathead screwdriver.
•ESD wrist strap.
•Marker.
Installation accessories
Before installation, make sure you have all the required installation accessories. If any accessory is
damaged or missing, use the part No. provided in this table to purchase a new one.
Table1-3 Installation accessories
Part No. Description Quantity
0223A19T
Mounting brackets
1 kit (provided)
2150A050
1U rack mounting rail kit A (long slide rails)
1 kit (provided)
2150A0CP
1U rack mounting rail kit B (super-short slide rails)
Optional
N/A M6 screw and cage nut User supplied

1-4
Part No. Description Quantity
0404A0KM
Grounding cable
1 (provided)
N/A Grounding screw 2 (provided)
2114A09C
Power supply filler panel
1 (provided)
N/A Releasable cable tie User supplied
04042967
Serial console cable
1 (provided)
14990101
SFP port dust plug
Same number as
the SFP28 ports
1499A01G
QSFP port dust plug
Same number as
the QSFP28 ports

2-5
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
caused thereby.
CAUTION:
When installing the switch, always wear an ESD wrist strap and
make sure the wrist strap makes
good skin contact and is reliably grounded.
Figure2-1 Installation flow
Start
Install the switch
Ground the switch
Connect power cords
Verify the installation
Turn on the circuit breakers
Operating correctly? Turn off the circuit
breakers
Troubleshoot the switch
Yes
No
End
Install fan trays
Install power supplies

2-6
Installing the switch in a 19-inch rack
Accessories for switch rack-mounting
Table2-2 Accessories for switch rack-mounting
Mounting brackets Rack mounting rail kit
1U high, one pair
(provided). See Figure2-2.
•1U rack mounting rail kit A, including one pair of chassis rails and one
pair of long slide rails (provided). See Figure2-3.
•1U rack mounting rail kit B, including one pair of chassis rails and one
pair of super-short slide rails (optional). See Figure2-4.
Figure2-2 Mounting brackets
Figure2-3 1U rack mounting rail kit A (long slide rails)
(1) Chassis rail
(2) Long slide rail
Figure2-4 1U rack mounting rail kit B (super-short slide rails)
(1) Chassis rail
(2) Super-short slide rail
12
12

2-7
Rack-mounting procedure at a glance
Figure2-5 Rack-mounting procedure
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 with the mounting brackets.
Chassis dimensions and rack requirements
Figure2-6 Chassis dimensions with the mounting brackets installed at the port side
(1) Power supply handle
(2) Mounting bracket
Figure2-7 Chassis dimensions with the mounting brackets installed at the power supply side
(1) Power supply handle
(2) Mounting bracket
Follow these guidelines when you install the switch in a 19-inch rack:
•The distance between the front and rear posts of the rack must meet the requirements
described in Table2-3.
•To secure the switch to the rack, you must install not only mounting brackets, but also chassis
rails and slide rails.
Select an installation
position for the mounting
brackets (near the power
supply side or port side)
Attach the
mounting
brackets to the
switch
Attach the
chassis rails to
the switch
Connect the
grounding cable to a
grounding point
Attach the slide
rails to the rack Mount the switch
in the rack

2-8
Table2-3 Distance requirements between the front and rear rack posts
Installation method Distance between the front and rear rack posts
Using mounting brackets and rack
mounting rail kit A (long slide rails) 621 mm to 793 mm (24.45 in to 31.22 in)
Using mounting brackets and rack
mounting rail kit B (super-short slide rails,
narrow-spacing installation) 330 mm to 505 mm (12.99 in to 19.88 in)
Using mounting brackets and rack
mounting rail kit B (super-short slide rails,
wide-spacing installation) 438 mm to 632 mm (17.24 in to 24.88 in)
Table2-4 Chassis dimensions and rack depth requirements
Chassis dimensions Rack depth requirement
•Height—44 mm (1.73 in) (1 RU)
•Width—440 mm (17.32 in).
•Total depth—425 mm (16.73 in)
25 mm (0.98 in) for the power
supply or fan tray handle
400 mm (15.75 in) for the
chassis.
To ensure that the rack door can be closed easily after cables are
connected, make sure the rack meets the following requirements:
•A minimum of 800 mm (31.50 in) in depth (recommended)
•A minimum of 130 mm (5.12 in) from the front rack post to
the front door
•A minimum of 449 mm (17.68 in) from the front rack post to
the rear door
Attaching the mounting brackets, chassis rails, and
grounding cable to the chassis
The switch has two mounting bracket installation positions on its two side panels: one near the
network port side and one near the power supply side.
The switch provides a primary grounding point (with a grounding sign) and an auxiliary grounding
point.

2-9
Figure2-8 Mounting bracket installation positions and grounding point positions
(1) Mounting bracket installation position near the power supply side
(2) Primary grounding point
(3) Auxiliary grounding point
(4) Mounting bracket installation position near the port side
Attaching the mounting brackets and chassis rails to the chassis
IMPORTANT:
M4 screws are used to secure the mounting brackets and chassis rails to the switch.
As a best
practice, use a torque of 12 kgf-cm (1.18 Nm) to fasten M4 screws.
To attach the mounting brackets and chassis rails to the chassis:
1. Place the wide flange of a mounting bracket against a side panel of the chassis and align the
round holes in the wide flange of the front mounting bracket with the screw holes in the side
panel. Then use M4 screws (provided) to attach the mounting bracket to the chassis.
To install the mounting brackets at the port side, see Figure2-9, Figure2-10, and Figure2-11.
To install the mounting brackets at the power supply side, see Figure2-12,Figure2-13, and
Figure2-14.
2. Determine the chassis rail installation position based on the mounting bracket installation
position.
3. Place the chassis rail against the side panel of the chassis and align the installation holes in the
chassis rail with rail mounting holes in the chassis. Then use M4 screws (provided) to attach the
chassis rail to the chassis.
For installation of chassis rails of rack mounting rail kitA(long slide rails), see Figure2-9 and
Figure2-12.
The chassis rails of rack mounting rail kit B (super-short slide rails) support narrow-spacing
installation and wide-spacing installation. Select narrow-spacing (as shown in Figure2-10
and Figure2-13) or wide-spacing (as shown in Figure2-11 and Figure2-14) installation
based on the distance between the front and rear rack posts.
4. Follow the same procedure to attach another mounting bracket and chassis rail to the opposite
side.

2-10
Figure2-9 Attaching the mounting brackets and chassis rails to the chassis (mounting
brackets installed near the port side, rack mounting rail kit A)
Figure2-10 Attaching the mounting brackets and chassis rails to the chassis (mounting
brackets installed near the port side, rack mounting rail kit B, narrow-spacing installation)
Figure2-11 Attaching the mounting brackets and chassis rails to the chassis (mounting
brackets installed near the port side, rack mounting rail kit B, wide-spacing installation)

2-11
Figure2-12 Attaching the mounting brackets and chassis rails to the chassis (mounting
brackets installed near the power supply side, rack mounting rail kit A)
Figure2-13 Attaching the mounting brackets and chassis rails to the chassis (mounting
brackets installed near the power supply side, rack mounting rail kit B, narrow-spacing
installation)
Figure2-14 Attaching the mounting brackets and chassis rails to the chassis (mounting
brackets installed near the power supply side, rack mounting rail kit B, wide-spacing
installation)
Connecting the grounding cable to the chassis
IMPORTANT:
The primary and auxiliary grounding point
s are located on the left side panel of the
chassis. The two
grounding points might be not reachable after the switch is mounted in the rack. Connect the

2-12
grounding cable to a grounding point before you mount the switch in the rack.
Select the primary or auxiliary grounding point as required. The procedure is the same for connecting
the grounding cable to the primary and auxiliary grounding points. The following procedure connects
the grounding cable to the primary grounding point (near the power supply side).
To connect the grounding cable to a grounding point:
1. Unpack the grounding cable and grounding screws (applicable to both the primary and auxiliary
grounding points).
2. Use the grounding screws to attach the two-hole grounding lug to the grounding point and then
fasten the screws, as shown in Figure2-15.
As a best practice, use a torque of 20 kgf-cm (1.96 Nm) to fasten the grounding screws.
Figure2-15 Attaching the grounding cable to the primary grounding point
Attaching the slide rails to the rack
IMPORTANT:
M
6 screws and cage nuts are used to attach the slide rails to the rack. P
repare M6 screws and cage
nuts yourself. As a best practice, use a torque of 30 kgf-cm (2.94 Nm) to fasten the M6 screws.
Before mounting the switch in the rack, you must attach slide rails to the rack.
The installation procedure is the same for different types of slide rails. The following procedure
attaches 1U long slide rails to the rack.
To attach the slide rails to the rack:
1. Identify the slide rail installation position on the rack based on the switch installation position.
2. Install cage nuts (user-supplied) in the mounting holes in the rack posts.
3. Align the screw holes in one slide rail with the cage nuts in a rear rack post, and then use M6
screws (user-supplied) to attach the slide rail to the rack, as shown in Figure2-16.
4. Attach the other slide rail to the rear rack post on the opposite side.
Make sure the two slide rails are at the same height and can slide into the chassis rails
smoothly.

2-13
Figure2-16 Installing the 1U long slide rails
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 mounting brackets and chassis rails have been securely attached to the switch
chassis.
3. Verify that the slide rails have been correctly attached to the rear rack posts.
4. Attach cage nuts (user-supplied) to the front rack posts and make sure they are at the same
level as the slide rails.
5. One person performs the following operations:
a. Supporting the bottom of the switch, aligns the chassis rails with the slide rails on the rack
posts.
b. Pushes the switch slowly for the slide rails to slide into the chassis rails smoothly until the
mounting brackets are flush against the front rack posts.
−For long slide rails of rack mounting rail kit A and slide rails of rack mounting rail kit C,
make sure the front ends of the slide rails reach out of the chassis rails.
−For super-short slide rails of rack mounting rail kit B, make sure the slide rails slide a
minimum length of 90 mm (3.54 in) into the chassis rails.
6. The other person uses screws (user-supplied, rust-proofed) to attach the mounting brackets to
the rack.