H3C S9825 Series User manual

i
Contents
1 Preparing for installation·············································································1
Safety recommendations ···································································································································1
Examining the installation site····························································································································1
Temperature/humidity································································································································2
Cleanliness·················································································································································2
Corrosive gas limit······································································································································2
EMI·····························································································································································3
Laser safety················································································································································3
Installation tools ·················································································································································3
Installation accessories······································································································································3
2 Installing the switch··················································································2-6
Installing the switch in a 19-inch rack··············································································································2-7
Rack-mounting procedure at a glance····································································································2-7
Chassis dimensions································································································································2-7
Rack requirements··································································································································2-8
Installation accessories···························································································································2-9
Mounting brackets, chassis rails, and grounding cable installation positions ·······································2-10
Attaching mounting brackets and chassis rails to the switch································································2-12
Connecting the grounding cable to the switch ······················································································2-14
Rack-mounting the switch·····················································································································2-16
Grounding the switch ····································································································································2-21
Installing/removing fan trays ·························································································································2-22
Installing a fan tray································································································································2-22
Removing a fan tray······························································································································2-23
Installing and removing power supplies········································································································2-24
Installing a power supply·······················································································································2-25
Removing a power supply·····················································································································2-26
Connecting power cords ·······························································································································2-27
Verifying the installation································································································································2-28
3 Accessing the switch for the first time····················································3-29
Connecting the switch to a configuration terminal·························································································3-29
Connecting the serial console cable ·····································································································3-29
Setting terminal parameters··················································································································3-30
Powering on the switch·································································································································3-30
4 Maintenance and troubleshooting··························································4-32
Power supply failure······································································································································4-32
Symptom···············································································································································4-32
Solution·················································································································································4-32
Fan tray failure··············································································································································4-32
Symptom···············································································································································4-32
Solution·················································································································································4-32
Configuration terminal display issues············································································································4-32
No output···············································································································································4-32
Garbled output ······································································································································4-33

1
1 Preparing for installation
The H3C S9825 & S9855 switch series include the following models:
Series Product model Product code
H3C S9825 and
S9855 switch series
S9825-64D •LS-9825-64D
•LS-9825-64D-H1
S9855-48CD8D LS-9855-48CD8D
S9855-24B8D LS-9855-24B8D
The S9825-64D is a 400G high-density aggregation switch. The S9855-48CD8D is a 100G
high-density ToR switch. The S9855-24B8D is a 200G high-density ToR switch. These switches are
designed for high-performance data centers and provide powerful hardware forwarding capacity and
abundant data center features.
The switch series provides the following ports and removable components:
•
400G QSFP-DD ports, 100G DSFP ports, and 200G QSFP56 ports.
•
Removable fan trays that can be configured in redundancy mode.
•
Removable power supplies that can be configured in redundancy mode.
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 in the equipment room and keep the air inlet and outlet vents of the
switch free of obstruction.
•
Make sure the operating voltage is in the required range.
•
To avoid electrical shocks, do not open the chassis while the switch is operating. As a best
practice, do not open the chassis even if the switch is powered off.
•
To avoid ESD damage, always wear an ESD wrist strap when replacing a removable
component such as a power supply or fan tray.
Examining the installation site
The switch must be used indoors. Make sure the installation site meets the following requirements:
•
Adequate clearance is reserved at the air inlet and outlet vents for ventilation.
•
The rack has a good ventilation system.

2
•
Identify the hot aisle and cold aisle layout 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
neighboring devices 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 long service life of your switch, install it in an environment that meets
the requirements described in the following subsections.
Temperature/humidity
Maintain the temperature and humidity in the equipment room in the acceptable ranges.
•
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 problems
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 information about the temperature and humidity requirements, see H3C S9825 & S9855 Switch
Series Hardware Information and Specifications.
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. Table1-1 describes the switch requirement for
cleanliness.
Table1-1 Switch requirement for cleanliness
Substance Particle diameter Concentration limit
Dust particles ≥ 0.5 µm ≤ 1.8 × 107particles/m3
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 Table1-2.
Table1-2 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

3
Gas Average concentration (mg/m3) Maximum concentration (mg/m3)
NOX0.5 1.0
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.
•
To prevent signal ports from getting damaged by overvoltage or overcurrent caused by lightning
strikes, route interface cables only indoors.
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 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.
•
ESD wrist strap.
•
Marker.
Installation accessories
Before installation, make sure you have all the required installation accessories. If an accessory is
damaged or lost, use its part No. to purchase a new one. You can find the part No. for the
accessories in Table1-3.
Table1-3 Installation accessories
Part No. Description Quantity Applicable switch
models
2150A0H4 Mounting brackets 1 kit, provided S9825-64D

4
Part No. Description Quantity Applicable switch
models
2150A0AN
Mounting brackets
1 kit, provided •S9855-48CD8D
•S9855-24B8D
2150A05D
1U rack-mount rail kit (short slide
rails)
Provided •S9855-48CD8D
•S9855-24B8D
N/A
LSVM1BSR10 bottom support
rails
Optional S9825-64D
N/A M6 screw and cage nut User supplied
•S9855-48CD8D
•S9825-64D
•S9855-24B8D
0404A0KM
Grounding cable
1, provided
•S9855-48CD8D
•S9825-64D
•S9855-24B8D
26010553 Grounding screw 2, provided
•S9855-48CD8D
•S9825-64D
•S9855-24B8D
2114A0EE
Power supply filler panel
1, provided •S9855-48CD8D
•S9855-24B8D
2, provided S9825-64D
N/A Releasable cable tie User supplied
•S9855-48CD8D
•S9825-64D
•S9855-24B8D
04042967
Console cable
User supplied
•S9855-48CD8D
•S9825-64D
•S9855-24B8D
14990101 SFP port dust plug Same number as the
DSFP ports S9855-48CD8D

5
Part No. Description Quantity Applicable switch
models
1499A01G
QSFP port dust plug
Same number as the
QSFP-DD ports
•S9855-48CD8D
•S9825-64D
•S9855-24B8D

2-6
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.
Figure2-1 Installation flow
Yes No
Start
Mount the switch in the rack
Connect the grounding cable
Connect power cords
Verify the installation
Power on the switch Troubleshoot the switch
Power off the switchOperating correctly?
End
Install fan trays
Install power supplies
Attach the installation accessories
to the switch and rack

2-7
Installing the switch in a 19-inch rack
Rack-mounting procedure at a glance
Figure2-2 Rack-mounting procedure
NOTE:
If a rack shelf is available, you can put the switch on the rack shelf and slide the switch to a position
so that the mounting brackets
are flush against
the front rack posts. Then use screws to secure the
mounting brackets to the rack.
Chassis dimensions
S9825-64D switches with the LS-9825-64D and LS-9825-64D-H1 product codes have the same
chassis dimensions. Figure2-3 shows the dimensions of an S9825-64D switch with the LS-9825-64D
product code that has mounting brackets installed.
Figure2-3 Dimensions of an S9825-64D switch with the LS-9825-64D product code that has
mounting brackets installed
(1) Fan tray handle
(2) Mounting bracket
Figure2-4 and Figure2-5 shows the dimensions of the S9855-48CD8D/S9855-24B8D switch.
Attach the
mounting
brackets to the
switch
(Optional.) Attach
the chassis rails
to the switch
Connect the
grounding cable
to the switch
Select an installation position
for the mounting brackets
(near the port side or power
supply side)
Mount the
switch in the
rack
Attach the slide
rails or bottom
support rails to
the rack

2-8
Figure2-4 S9855-48CD8D/S9855-24B8D switch dimensions with mounting brackets installed
at the port side
(1) Fan tray handle
(2) Mounting bracket
Figure2-5 S9855-48CD8D and S9855-24B8D switch dimensions with mounting brackets
installed at the power supply side
(1) Fan tray handle
(2) Mounting bracket
Rack requirements
To mount the switch in a 19-inch rack, make sure the rack meets the requirements in Table2-1.
Table2-2 Rack requirements
Switch model Installation
method Chassis dimensions
Requirements
for the distance
between the
front and rear
rack posts
Rack depth
requirements
S9825-64D Bottom
support rails
(optional)
•Height—175
mm (6.89 in)/4
RU
•Width—440 mm
(17.32 in)
•Depth—810 mm
(31.89 in)
760 mm
(29.92 in) for
the chassis
50 mm (1.97
in) for the fan
tray handles
630 to 900 mm
(24.80 to 35.43 in)
•A minimum of
1000 mm (39.37
in) in depth
(recommended)
•A minimum of
130 mm (5.12 in)
between the front
rack post and the
front door.
•A minimum of
850 mm (33.46
in) between the
front rack post
and the rear
door.
•S9855-48CD
8D
•S9855-24B8
Mounting
brackets and
short slide rails
•Height—44 mm
(1.73 in)/4 RU
•Width—440 mm
472 to 828 mm
(18.58 to 32.60 in)
•A minimum of
1000 mm (39.37
in) in depth

2-9
Switch model Installation
method Chassis dimensions
Requirements
for the distance
between the
front and rear
rack posts
Rack depth
requirements
D
(provided)
(17.32 in)
•Depth—691 mm
(27.20 in)
660 mm
(25.98 in) for
the chassis
31 mm (1.22
in) for the fan
tray handles
(recommended)
•A minimum of
130 mm (5.12 in)
between the front
rack post and the
front door.
•A minimum of
750 mm (29.53
in) between the
front rack post
and the rear
door.
IMPORTANT:
To reserve enough cabling space and close the rack door easily, make sure the rack meets the
depth requirements.
Installation accessories
Table2-3 Installation accessories for rack-mounting the switch
Switch model Mounting brackets
(provided) Rack mounting rail kit Rack mounting
rail kit part No.
S9855-48CD8D
S9855-24B8D 1U high, one pair. See
Figure2-6.
1U high, including one pair of short
slide rails and one pair of chassis
rails (provided). See Figure2-8 2150A05D
S9825-64D 2U high, one pair. See
Figure2-7.
2U high, including one pair of
bottom support rails (optional). See
Figure2-9. N/A
Figure2-6 Mounting brackets provided with the S9855-48CD8D and S9855-24B8D switches

2-10
Figure2-7 Mounting brackets provided with the S9825-64D switch
Figure2-8 1U short slide rails and chassis rails
Figure2-9 2U bottom support rails
(1) Front end mark (FRONT) (2) Guide rail (3) Installation hole
Mounting brackets, chassis rails, and grounding cable
installation positions
S9825-64D switches with the LS-9825-64D and LS-9825-64D-H1 product codes have the same
mounting bracket and grounding cable installation positions. The S9825-64D switch with the
LS-9825-64D product code has one grounding point as shown in Figure2-10.

2-11
The S9855-48CD8D and S9855-24B8D switches each provides two grounding points: primary
grounding point (with a grounding sign) and auxiliary grounding point, as shown in Figure2-11.
Select installation positions for the mounting brackets, chassis rails, and grounding cable as
required.
Figure2-10 Mounting brackets and grounding cable installation positions on the S9825-64D
switch
(1) Mounting bracket installation position
(2) Grounding point
Figure2-11 Mounting brackets and grounding cable installation positions on the
S9855-48CD8D/S9855-24B8D switch
(1) Power supply-side installation position for the mounting bracket
(2) Primary grounding point
(3) Auxiliary grounding point
(4) Port-side installation position for the mounting bracket

2-12
Attaching mounting brackets and chassis rails to the switch
IMPORTANT:
•
The S9855-64D switch uses 2U bottom support rails for rack mounting. You are not required to
attach chassis rails to it.
•
M4 screws are used to attach 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 the mounting bracket against the chassis side panel. Align the
mounting bracket installation holes with the screw holes in the side panel. Then use the
provided M4 screws to attach the mounting bracket to the chassis.
To install the mounting brackets at the port-side mounting position, see Figure2-12 and
Figure2-13.
To install the mounting brackets at the power supply-side mounting position, see
Figure2-14.
For the S9855-48CD8D and S9855-24B8D switches, use the four installation holes at the
narrow side of the mounting brackets for installation.
2. Determine the installation position of the chassis rails based on the position of mounting
brackets and the distance between the front and rear rack posts.
Table2-4 Chassis rail installation position
Switch model Mounting bracket
position Distance between the front and rear rack posts
Chassis rail
installation
position
S9825-64D (2U
bottom support
rails) See Figure2-12.630 to 900 mm (24.80 to 35.43 in) N/A
S9855-48CD8D
S9855-24B8D
(short slide rails)
Port-side installation
position for mounting
brackets, as shown in
Figure2-13.
650 × 828 mm (25.59 × 32.60 in) Position a
585 × 763 mm (23.03 × 30.04 in) Position b
520 × 698 mm (20.47 × 27.48 in) Position c
Power supply-side
installation position for
mounting brackets, as
shown in Figure2-14.
580 × 758 mm (22.83 × 29.84 in) Position d
515 × 693 mm (20.28 × 27.28 in) Position e
472 × 628 mm (18.58 × 24.72 in) Position f
3. Place the chassis rail against the chassis side panel. Align the chassis rail installation holes with
the screw holes. Use the provided M4 screws to attach the chassis rail to the chassis. See
Figure2-13 to Figure2-14.

2-13
Figure2-12 Attaching the mounting brackets to the S9825-64D switch
Figure2-13 Attaching the mounting brackets and chassis rails to the
S9855-48CD8D/S9855-24B8D switch (port-side mounting position for the mounting brackets)

2-14
Figure2-14 Attaching the mounting brackets and chassis rails to the
S9855-48CD8D/S9855-24B8DF switch (power supply-side mounting position for the
mounting brackets)
NOTE:
The mounting bracket and chassis rail installation procedures are
the same for the left and right
chassis side panels.
Connecting the grounding cable to the switch
IMPORTANT:
As a best practice, use a torque of 20 kgf-cm (1.96 Nm) to fasten the grounding screws.
Connecting the grounding cable for the S9825-64D switch
The S9825-64D switch has one grounding point on the rear panel. S9825-64D switches with the
LS-9825-64D and LS-9825-64D-H1 product codes have the same grounding cable connection
method. The following uses an S9825-64D switch with the LS-9825-64D product code as an
example.
To connect the grounding cable to the S9825-64D switch:
1. Unpack the grounding cable and grounding screws.
2. Use the grounding screws to attach the two-hole grounding lug of the grounding cable to the
grounding holes at the grounding point. Then use a screwdriver to fasten the screws. See
Figure2-15.

2-15
Figure2-15 Connecting the grounding cable to an S9825-64D switch
Connecting the grounding cable for the S9855-48CD8D/S9855-24B8D switch
IMPORTANT:
After the switch is mounted in the rack, the grounding points on the side panel will not be reachable.
Connect the grounding cable to a grounding point before installing the switch in the rack.
The S9855-48CD8D and S9855-24B8D switches each provide two grounding points: primary
grounding point (with a grounding sign) and auxiliary grounding point on the left side panel.
Select the grounding point based on the mounting bracket installation positions.
•
If you install the mounting brackets at the port side, connect the grounding cable to the
grounding point (auxiliary) at the port side.
•
If you install the mounting brackets at the power supply side, connect the grounding cable to the
grounding point (primary) at the power supply side.
The grounding cable connection procedure is similar for using the primary or auxiliary grounding
point. The primary grounding point is used as an example in the following figure:
1. Unpack the grounding cable and grounding screws.
2. Use the grounding screws to attach the two-hole grounding lug of the grounding cable to the
grounding holes at the grounding point. Then use a screwdriver to fasten the screws. See
Figure2-16.

2-16
Figure2-16 Connecting the grounding cable to an S9855-48CD8D/S9855-24B8D switch
Rack-mounting the switch
Attaching slide rails or bottom support rails to the rack
IMPORTANT:
M6 screws and cage nuts are used to attach
slide rails or bottom support rails to the rack. Prepare
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 or bottom support rails to the rack.
To attach slide rails or bottom support rails to the rack:
1. Identify the installation position of the slide rails and bottom support rails on the rack based on
the switch installation position.
2. Attach cage nuts (user-supplied) to the mounting holes in the rack posts.
3. (Applicable to the 1U slide rails.) 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 Figure2-17.
4. (Applicable to the bottom support rails.) Align the screw holes in the two ends of a bottom
support rail with the cage nuts in the front and rear rack posts, and then use M6 screws
(user-supplied) to attach the slide rail to the rack, as shown in Figure2-18.
5. Attach the other slide rail or bottom support rail to the other rear rack post.
Make sure the two slide rails or bottom support rails are at the same height.

2-17
Figure2-17 Installing the 1U slide rails

2-18
Figure2-18 Installing the bottom support rails
Mounting 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 or bottom support 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 or bottom support rails.
5. (Applicable to the S9855-48CD8D and S9855-24B8D switches) 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 smoothly slide into the chassis rails until the
mounting brackets are flush against the front rack posts. To ensure installation security,
make sure the slide rails slide out of the chassis rails a minimum of 20 mm (0.79 in).
6. (Applicable to the S9825-64D switch) One person places the switch on the bottom support rails
attached to the rack. Then push the switch slowly into the rack until the mounting brackets are
flush against the front rack posts.
7. The other person uses M6 screws (user-supplied, rust-proofed) to attach the mounting brackets
to the rack. Make sure the switch is installed level and secure.
As a best practice, use a torque of 30 kgf-cm (2.94 Nm) to fasten the M6 screws.

2-19
Figure2-19 Mounting an S9825-64D switch in the rack
Figure2-20 Mounting an S9855-48CD8D switch in the rack (mounting brackets installed at the
port side)