H3C S9820-8C and S9820-8C-SAN switches are high-density intelligent 100G/400G switches developed for data centers, providing powerful hardware forwarding capacity and abundant data center features.

This document is applicable to the following switch models:

Product model	Product code
S9820-8C	LS-9820-8C
S9820-8C-SAN	LS-9820-8C-SAN

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 power supplies, fan modules, and interface modules.

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.

· 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 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 S9820-8C & S9820-8C-SAN Ethernet Switches 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 × 107 particles/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 Table1-2.

Table1-2 Corrosive gas concentration limits

Gas	Average concentration (mg/m3)	Maximum concentration (mg/m3)
SO2	0.3	1.0
H2S	0.1	0.5
Cl2	0.1	0.3
HCI	0.1	0.5
HF	0.01	0.03
NH3	1.0	3.0
O3	0.05	0.1
NOX	0.5	1.0

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.

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 BOM code to purchase a new one. You can find the BOM codes for the accessories in Table1-3.

Table1-3 Installation accessories

BOM code	Description	Quantity
0223A1B0	Mounting brackets	1 kit (provided). The mounting bracket with a round hole in the narrow flange supports hanging a fixed asset tag.
0231A2VL	Bottom support rails	1 kit. You must purchase bottom support rails for rack-mounting the switch.
0231ACWW	Cable management frame	1 or 2 (optional)
N/A	M6 screw and cage nut	As required (user supplied)
0404A1RB (single-hole grounding lug) or 0404A162 (two-hole grounding lug)	Grounding cable with a single-hole grounding lug Grounding cable with a two-hole grounding lug	1 (provided)
26010553	Grounding screw	2 (provided)
2113A2TU	Interface module filler panel	8 (provided)
2114A0CK	Power supply filler panel	2 (provided)
N/A	Releasable cable tie	As required (user supplied)
04042967	Console cable	Optional
0404A1EE	USB-to-RJ45 console cable	Optional
N/A	Mini USB console cable	User supplied
14990101	SFP port dust plug	1 (provided)

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

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 make close contact with the front rack posts. Then use screws to secure the mounting brackets to the rack.

Rack requirements

To mount the switch in a 19-inch rack, the rack must meet the requirements in Table2-2.

Figure2-3 S9820-8C/S9820-8C-SAN chassis dimensions

(1) Fan module handle	(2) Interface module ejector lever

Table2-2 Rack requirements

Switch model	Chassis dimensions	Distance between the front and rear rack posts	Rack requirements
S9820-8C S9820-8C-SAN	· Height—130.5 mm (5.14 in)/3 RU · Width—440 mm (17.32 in) · Depth—837 mm (32.95 in) ¡ 760 mm (29.92 in) for the chassis ¡ 27 mm (1.06 in) for the interface module ejector levers ¡ 50 mm (1.97 in) for the fan module handles	630 to 900 mm (24.80 to 35.43 in)	· A minimum of 1200 mm (47.24 in) in depth (recommended) · A minimum of 150 mm (5.91 in) between the front rack post and the front door. · A minimum of 840 mm (33.07 in) between the front rack post and the rear door.

Switch model

Chassis dimensions

Distance between the front and rear rack posts

Rack requirements

S9820-8C

S9820-8C-SAN

· Height—130.5 mm (5.14 in)/3 RU

· Width—440 mm (17.32 in)

· Depth—837 mm (32.95 in)

¡ 760 mm (29.92 in) for the chassis

¡ 27 mm (1.06 in) for the interface module ejector levers

¡ 50 mm (1.97 in) for the fan module handles

630 to 900 mm (24.80 to 35.43 in)

· A minimum of 1200 mm (47.24 in) in depth (recommended)

· A minimum of 150 mm (5.91 in) between the front rack post and the front door.

· A minimum of 840 mm (33.07 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

Item	Quantity and requirements
Mounting bracket (provided)	1 kit. See Figure2-4. The mounting bracket with a round hole in the narrow flange supports hanging a fixed asset tag.
Cable management frame (optional)	You can purchase one or two cable management frames for the switch as required. See Figure2-5.
Bottom support rails (not provided)	1 kit. You must purchase bottom support rails for rack-mounting the switch. See Figure2-6.

Figure2-4 Mounting brackets

Figure2-5 Cable management frame

Figure2-6 Bottom support rails

(1) Installation hole	(2) Guide rail
(3) Front end mark (FRONT)

Attaching the m ounting brackets to the chassis

As shown in Figure2-7, the switch provides one installation position for mounting brackets.

Figure2-7 Installation position for mounting brackets

(1) Installation position for mounting brackets

To attach the mounting brackets to the chassis:

1. Place the wide side of a mounting bracket against its installation position on the chassis. Align the mounting holes in the mounting bracket with the screw holes in the chassis.

2. Use the provided M4 screws 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.

3. Attach the other mounting bracket to the other side of the chassis in the same way.

Figure2-8 Attaching the mounting brackets to the switch

Attaching cage nuts and bottom support rails to the rack

1. Identify and mark the cage nut installation holes on the rack for securing mounting brackets and bottom support rails.

The LSVM1BSR10 slide rails occupy 2U rack space, as shown in Figure2-9.

In a standard 1U rack space, there are three installation holes, one in the middle for auxiliary installation and one at either end for standard installation. The spacing between two adjacent standard installation holes is slightly smaller than the distance between a standard installation hole and the middle, auxiliary installation hole.

Figure2-9 Slide rail installation position on the rack

(1) Positioning tab

(2) Bottom square hole in the 2U rack space

2. Install cage nuts (user-supplied) in the marked mounting holes in the rack posts.

3. Align the screw holes in one bottom support rail with the installation holes in the rack posts at one side. Use the user-supplied M6 screws to attach the bottom support rail to the posts, as shown in Figure2-10.

As a best practice, use a torque of 30 kgf-cm (2.94 Nm) to fasten the M6 screws.

4. Perform the same procedure to attach the other bottom support rail to the rack posts at the other side.

Make sure the two bottom support rails are at the same height so that the bottom support rails can slide into the chassis rails steadily.

Figure2-10 Installing bottom support rails

Mounting the switch in the rack

This task requires two people.

To mount the switch in the rack:

1. Verify that the mounting brackets have been securely attached to the switch chassis.

2. Verify that the bottom support rails and cage nuts have been correctly attached to the rack posts.

3. One person performs the following operations:

a. Supporting the bottom of the switch, aligns the chassis with the bottom support rails.

b. Pushes the switch slowly into the rack so that the mounting brackets are flush against the rack posts.

4. Another person uses screws of appropriate size to attach the mounting brackets to the rack.

You need to prepare these screws yourself. Make sure the screws are anti-corrosive.

Figure2-11 Mounting the switch in the rack

Attaching the cable management frame to the rack

You can purchase one cable management frame for the switch and install it on the rack posts immediately above or below the switch as required. For more organized cabling, you can purchase two cable management frames so that the switch has a cable management frame installed both above and below it.

To attach a cable management frame to the switch:

1. Verify that the cage nuts for securing the cable management frame have been correctly attached to the rack posts. For more information, see "Attaching cage nuts and bottom support rails to the rack."

2. Determine to install the cable management frame above or below the switch based on the cabling requirements.

3. Use screws of appropriate size to attach the cable management frame securely to the front rack posts.

Figure2-12 Attaching a cable management frame to the front rack posts

Connecting the grounding cable to the chassis

Use M5 grounding screws to attach a grounding cable that has a two-hole grounding lug or single-hole grounding lug to the grounding point on the switch. If the grounding cable length or terminal type cannot meet your requirement, make an applicable grounding cable or contact H3C Support.

As shown in Figure2-13, the switch provides one grounding point at the rear panel.

Figure2-13 Grounding point

(1) Grounding point

To connect the grounding cable to the chassis:

1. Unpack the grounding cable and grounding screws.

2. Use grounding screws to attach the two-hole grounding lug or single-hole grounding lug of the grounding cable to the grounding point, and then fasten the screws. As a best practice, use a torque of 30 kgf-cm (2.94 Nm) to fasten the grounding screws.

Figure2-14 Attaching the grounding cable that has a single-hole grounding lug to the grounding point on the switch

Figure2-15 Attaching the grounding cable that has a two-hole grounding lug to the grounding point on the switch

Grounding the switch

WARNING!

· Correctly connecting the grounding cable is crucial to lightning protection and EMI protection.

· Connect the grounding cable to the grounding system in the equipment room. Do not connect it to a fire main or lightning rod.

CAUTION:

To guarantee the grounding effect, connect the switch to a grounding strip in the equipment room by using the grounding cable provided with the switch.

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 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.

You can ground a switch by using a grounding strip at the installation site.

NOTE:

The grounding terminals in this section are for illustration only.

To ground the switch by using a grounding strip:

1. Attach the two-hole grounding lug of the grounding cable to the grounding point on the chassis. For more information, see "Connecting the grounding cable to the chassis."

2. Remove the hex nut of a grounding post on the grounding strip.

3. Attach the ring terminal at the other end of the grounding cable to the grounding post on the grounding strip, and secure the ring terminal to the grounding post with the hex nut.

Figure2-16 Connecting the grounding cable to a grounding strip

(1) Hex nut	(2) Ring terminal
(3) Grounding post	(4) Grounding strip

Installing/removing fan modules

CAUTION:

The switch has five fan module slots. For adequate heat dissipation, follow these guidelines:

· The switch comes with the fan module slots empty. As a best practice for adequate heat dissipation of the switch, fully configure the switch with fan modules of the same model. If the number of installed fan modules is less than the minimum required number, the device will output an error message and does not power up.

· Make sure each slot has a module or filler panel installed when the switch is operating.

· If multiple fan modules fail on the operating switch, do not remove the fan modules at the same time. Replace the fan modules one after another and finish replacing a fan module within 3 minutes.

CAUTION:

· Do not touch any bare cables or terminals on the fan module.

· Do not place the fan module in a wet area, and prevent liquid from entering into the fan module.

· When an internal circuit or component of the fan module fails, contact H3C Support. Do not remove any component from the fan module yourself.

The switch uses a front-rear air aisle and supports the FAN-80B-1-B fan module. The FAN-80B-1-B fan module provides port side-intake and power supply side-exhaust airflow and its handle is red.

Before installing a fan module, make sure the airflow direction provided by the fan module meets the ventilation requirements.

Installing a fan module

CAUTION:

To prevent damage to the fan module or the connectors on the backplane, insert the fan module gently. If you encounter a hard resistance while inserting the fan module, pull out the fan module and insert it again.

IMPORTANT:

Before powering on the switch, make sure the fan module airflow direction and the preferred airflow direction of the switch are the same. If they are not the same, the system generates traps and logs. You can use the fan prefer-direction command to configure the preferred airflow direction for the switch. By default, the preferred airflow direction of the switch is from the port side to the power supply side. For more information about the fan prefer-direction command, see device management in H3C S9820-8C & S9820-8C-SAN Ethernet Switches Fundamentals Command Reference.

Select appropriate fan modules as needed. For the optional fan modules and their specifications, see H3C S9820-8C & S9820-8C-SAN Ethernet Switches Hardware Information and Specifications.

The switch supports shipping with fan modules and power supplies installed. If your switch came with fan modules preinstalled, skip this section.

To install a fan module:

1. Wear an ESD wrist strap and make sure it makes good skin contact and is reliably grounded.

2. Unpack the fan module and verify that the fan module model is correct.

3. Orient the fan module with the adapter facing upwards. Grasp the handle of the fan module with one hand and support the fan module bottom with the other. Slide the fan module along the guide rails into the slot until the fan module is fully seated in the slot and has a firm contact with the backplane. See Figure2-17.

The fan module and the fan module slot each have an alignment hole. Orient the fan module as indicated by alignment holes. Ensure that the alignment hole in the fan module is aligned with that in the switch after the fan module installation.

Figure2-17 Installing a FAN-80B-1-B fan module

Removing a fan module

WARNING!

· Ensure electricity safety and never touch the rotating fans when you hot-swap a fan module.

· To prevent a fan from causing loud noise, do not touch the fan blades and rotation axis, even if the fan is not rotating.

To remove a fan module:

1. Wear an ESD wrist strap and make sure it makes good skin contact and is reliably grounded.

2. Press the red part of the handle with one hand and pull the fan module part way out of the slot. Supporting the fan module bottom with the other, pull the fan module completely out of the slot along the guide rails.

3. Put the removed fan module in an antistatic bag.

Figure2-18 Removing a FAN-80B-1-B fan module

Installing and removing power supplies

WARNING!

· To avoid bodily injury or device damage, strictly follow the procedures in Figure2-19 and Figure2-20 to install and remove a power supply.

· Provide a separate circuit breaker for each power supply.

CAUTION:

Make sure each slot has a filler panel or module installed when the switch is operating.

The switch has four power supply slots at the rear panel. It is shipped with power supply slots PWR1 and PWR2 empty and power supplies slots PWR3 and PWR4 each installed with a filler panel.

The switch supports 2+1 and 2+2 power supply redundancy. You can install two to four power supplies for the switch as needed. For information about the power supplies available for the switch, see H3C S9820-8C & S9820-8C-SAN Ethernet Switches Hardware Information and Specifications.

Figure2-19 Power supply installation procedure

Figure2-20 Power supply removal procedure

Safety guidelines

To prevent device damage and even bodily injury, follow these restrictions and guidelines when you install or remove a power supply:

· Always wear an ESD wrist strap and make sure the strap makes good skin contact.

· Before installing a power supply, make sure the voltage of the power source is as required by the power supply, and the output voltage of the power supply is as required by the device.

· Do not touch any bare cables or terminals on the power supply.

· Do not place the power supply in a wet area, and prevent liquid from entering the power supply.

· To avoid power supply damage, do not open the power supply. When an internal circuit or component of the power supply fails, contact H3C Support.

Installing a power supply

The switch supports shipping with fan modules and power supplies installed. If your switch came with power supplies preinstalled, skip this section.

To install a power supply:

1. Remove the filler panel, if any, from the target power supply slot, as shown in Figure2-21.

Figure2-21 Removing a filler panel

2. Unpack the power supply and verify that the power supply model is correct.

3. Correctly orient the power supply with the lettering on it upward. Grasping the power supply handle with one hand and supporting the module bottom with the other, slide the power supply slowly into the slot along the guide rails. Make sure the power supply connectors have firm contact with the backplane.

If you insert the power supply into the slot upside down, the power supply output connectors might be damaged during the inserting or removing process.

If you encounter a hard resistance while inserting the power supply, pull out the power supply, orient it correctly, and then insert it again. Do not insert the power supply forcibly.

Figure2-22 Installing a power supply (PSR1600B-12A-B)

IMPORTANT:

Keep the filler panel for power supply slots and packaging boxes and bags of power supplies secure for future use.

Removing a power supply

CAUTION:

The switch supports 2+1 or 2+2 power supply redundancy. When the switch is configured with four power supplies, removing one or two power supplies does not affect the operation of the switch. When the switch has only two power supplies installed, removing power supplies powers off the switch or causes power insufficiency.

To remove a power supply:

1. Turn off the circuit breaker for power input.

2. Remove the power cord from the power supply.

3. As shown in Figure2-23, use one hand to hold the power supply handle, press the latch towards the handle, and then pull the power supply part way out of the slot. Supporting the power supply with the other hand, pull it completely out of the slot.

4. Put the removed power supply in an antistatic bag for future use.

5. If you are not to install a new power supply, install a filler panel in the slot to ensure good ventilation in the switch.

Figure2-23 Removing the power supply

(1) Press the latch towards the handle	(2) Pull the power supply out

Connecting the power cord for a power supply

WARNING!

· Make sure each power cord has a separate circuit breaker.

· Before you connect a power cord, make sure the circuit breaker for the power cord is switched off.

The switch uses PSR1600B-12A-B power supplies. To connect the AC power cord for a PSR1600B-12A-B power supply:

1. Insert the female connector of the AC power cord supplied with the power supply into the power receptacle on the power supply.

2. Use a releasable cable tie to secure the power cord to the handle of the power supply, as shown in Figure2-24.

3. Connect the other end of the power cord to an AC power source.

4. Observe the status LED on the power supply. If the LED is flashing green or steady green, the power cord is connected correctly. If the LED is not on or is orange, check the installation carefully, and try again after eliminating faults until the LED is normal.

Figure2-24 Connecting the AC power cord for a PSR1600B-12A-B power supply

(1) Releasable cable tie
(2) Lock the cable tie to secure the power cord to the handle of the power supply

Installing and removing interface modules

CAUTION:

When you install or remove an interface module, follow these guidelines:

· Never touch the components on the interface module.

· Do not use excessive force.

· The interface modules are hot swappable. Do not install or remove an interface module during startup of the switch.

· Attach dust plugs to the empty ports on the interface modules to prevent dust from entering the ports.

The switch provides eight interface module slots. For the interface modules available for the switch and the interface module specifications, see H3C S9820-8C & S9820-8C-SAN Ethernet Switches Hardware Information and Specifications. The following installation and removal procedures use an LSWM116H interface module as an example.

Installing an interface module

1. Wear an ESD wrist strap and make sure the wrist strap makes good skin contact and is reliably grounded.

2. Remove the filler panel, if any, from the target interface module slot. As shown in Figure2-25, put your thumb and forefinger into the two holes of the filler panel. Then press down the metal tab in the top hole and pull out the filler panel along the guide rails.

Figure2-25 Removing the filler panel from the interface module slot

Keep the removed filler panel secure for future use.

3. Unpack the interface module.

4. Press down and hold the latch of the ejector lever to pull the ejector lever out.

Figure2-26 LSWM116H interface module

(1) Latch	(2) Ejector lever

5. Insert the module slowly into the slot along the guide rails, as shown by callout 1 in Figure2-27.

6. Press down and hold the latch of the ejector lever to rotate the ejector lever to its original place, and then release the grip on the latch to lock the ejector lever in place, as shown by callout 2 in Figure2-27.

Figure2-27 Installing an LSWM116H interface module

Removing an interface module

CAUTION:

If you are not to install a new interface module after removing the original one, install a filler panel in the slot to prevent dust and ensure good ventilation.

To remove an interface module:

1. Prepare an anti-static bag.

2. Wear an ESD wrist strap and make sure the wrist strap makes good skin contact and is reliably grounded.

3. To avoid cable damage, remove cables from the interface module before removing the module.

4. Press down and hold the latch of the ejector lever to pull the ejector lever out.

5. Open the ejector lever to disengage the interface module from the device connector.

6. Use both hands to slowly take the module out.

7. Place the removed interface module on an anti-static mat or in an anti-static bag.

Figure2-28 Removing an LSWM116H interface module

Verifying the installation

After you complete the installation, verify the following items:

· There is enough space around the switch for heat dissipation.

· The rack is sturdy and stable.

· The grounding cable is securely connected.

· The power supplies are as required by the switch.

· The power cords are correctly connected.

· The network cable is routed indoors. The switch does not support outdoor cable routing.

3 Accessing the switch for the first time

Connecting the switch to a configuration terminal

The following options are available for connecting the switch to a configuration terminal:

· Use a serial console cable to connect the serial console port on the switch to a configuration terminal.

· Use a mini USB console cable to connect the mini USB console port on the switch to a configuration terminal.

Only the mini USB console port is active if you connect both the serial console port and mini USB console port.

The example uses a serial console cable to connect a console terminal (PC) to the serial console port on the switch.

Figure3-1 Connecting the serial console port to a terminal

As shown in Table3-1, three types of console cables can be used for connecting the switch to a configuration terminal. The switch is not provided with a serial console cable or a mini USB console cable.

Table3-1 Connection methods and console cables

Connection method	Console cable type	Configuration terminal-side connector	Switch-side connector
Using the serial console port for connection	DB9-to-RJ45 console cable	DB-9 female connector	RJ-45 connector
Using the serial console port for connection	USB-to-RJ45 console cable	USB connector	RJ-45 connector
Using the mini USB console port for connection	Mini USB console cable	USB connector	USB mini-Type B connector

The signal pinout for the RJ-45 connector of a serial console cable varies by vendor. To avoid abnormal configuration terminal display, use a serial console cable provided by H3C. For more information, see Table3-2. To prepare a serial console cable yourself, make sure the signal pinout for the RJ-45 connector is the same as that shown in Table3-3.

Table3-2 Console cable views

Console cable type	Console cable view	Product code for the recommended H3C console cable
DB9-to-RJ45 console cable		04042967
USB-to-RJ45 console cable		0404A1EE
Mini USB console cable		User supplied,

Connecting the console cable

Connecting a DB9-to-RJ45 console cable

CAUTION:

· Identify the mark on the serial console port and make sure you are connecting to the correct port.

· The serial ports on PCs do not support hot swapping. To connect a PC to an operating switch, first connect the PC end. To disconnect a PC from an operating switch, first disconnect the switch end.

A serial console cable is an 8-core cable, with a crimped RJ-45 connector at one end for connecting to the serial console port of the switch, and a DB-9 female connector at the other end for connecting to the serial port on the console terminal.

Figure3-2 Serial console cable

Table3-3 Console port signaling and pinout

RJ-45	Signal	DB-9	Signal
1	RTS	8	CTS
2	DTR	6	DSR
3	TXD	2	RXD
4	SG	5	SG
5	SG	5	SG
6	RXD	3	TXD
7	DSR	4	DTR
8	CTS	7	RTS

To connect a configuration terminal (for example, a PC) to the switch through a DB9-to-RJ45 console cable:

1. Plug the DB-9 female connector of the DB9-to-RJ45 console cable to the serial port on the PC.

2. Connect the RJ-45 connector to the serial console port on the switch.

Connecting a USB-to-RJ45 console cable

IMPORTANT:

· To use a USB-to-RJ45 console cable to connect the switch to a configuration terminal, first download and install the USB-to-RJ45 console driver on the configuration terminal and then connect the USB-to-RJ45 console cable to the configuration terminal.

· If you have connected a USB-to-RJ45 console cable to the configuration terminal before driver installation, you must remove and reconnect the USB-to-RJ45 console cable to the configuration terminal.

For information about the signal pinout for the RJ-45 connector of a USB-to-RJ45 console cable, see Table3-3.

The following procedure describes how to install the driver on the Windows system. To install the driver on other operating systems, see the installation guide in the driver compression package named by the corresponding operating system.

To connect the switch to the configuration terminal through a USB-to-RJ45 console cable:

1. Click the following link, or copy it to the address bar on your browser and download the USB-to-RJ45 console driver.

http://www.h3c.com/en/home/USB_to_RJ45_Console/

2. View the TXT file Read me in the Windows folder to check whether the Windows system of the configuration terminal supports the driver.

3. If the Windows system supports the driver, install PL23XX-M_LogoDriver_Setup_v200_20190815.exe.

4. Click Next on the welcome page of the driver installation wizard.

Figure3-3 Driver installation wizard

5. Click Finish after the drive installation is completed.

Figure3-4 Finishing the driver installation

6. Connect the standard USB connector of the cable to the USB port of the configuration terminal.

7. Connect the RJ-45 connector of the cable to the console port of the switch.

Connecting a mini USB console cable

A mini USB console cable has a USB mini-Type B connector at one end to connect to the mini USB console port of the switch, and a standard USB Type A connector at the other end to connect to the USB port on the configuration terminal.

To connect to the mini USB console port on the switch to a configuration terminal:

1. Connect the standard USB Type A connector to the USB port of the configuration terminal.

2. Click the following link, or copy it to the address bar on the browser to log in to download page of the USB console driver, and download the driver.

http://www.h3c.com/en/home/USB_Console/

3. Run Installer to preinstall the driver. After the preinstallation finishes, the system pops up a dialog box to indicate a successful preinstallation.

4. Connect the USB mini-Type B connector to the Mini USB console port on the switch. The system installs the driver automatically.

Setting terminal parameters

To configure and manage the switch through the console port, you must run a terminal emulator program, TeraTermPro or PuTTY, on your configuration terminal. You can use the emulator program to connect a network device, a Telnet site, or an SSH site. For more information about the terminal emulator programs, see the user guides for these programs

The following are the required terminal settings:

· Bits per second—9600.

· Data bits—8.

· Stop bits—1.

· Parity—None.

· Flow control—None.

Powering on the switch

1. Before powering on the switch, verify that the following conditions are met:

¡ All the fan module slots have a fan module installed.

¡ The power cords are connected correctly.

¡ The input power voltage is as required by the switch.

¡ The console cable is connected correctly.

¡ The configuration terminal (a PC, for example) has started, and its serial port settings are consistent with the console port settings on the switch.

2. Power on the switch.

During the startup process, you can access BootWare menus to perform tasks such as software upgrade and file management. The BootWare interface and menu options vary by software version. For more information about BootWare menu options, see the software-matching release notes for the device.

3. After the startup completes, you can access the CLI to configure the switch.

For more information about the configuration commands and CLI, see H3C S9820-8C & S9820-8C-SAN Ethernet Switches Configuration Guides and H3C S9820-8C & S9820-8C-SAN Ethernet Switches Command References.

4 Setting up an M-LAG system

Multichassis Link Aggregation (M-LAG) virtualizes two physical devices into one system through multichassis link aggregation to provide device-class high availability and load sharing.

Compared to IRF, M-LAG offers higher network reliability and shorter service interruption during upgrade.

You cannot configure IRF and M-LAG on the same network.

IMPORTANT:

· In Release 6635 and earlier, M-LAG is called DRNI and uses the DRNI set of command keywords in the CLI.

· In Release 6710 and later, the device supports both the M-LAG set and DRNI set of command keywords in the CLI by default. The two sets of commands are consistent in the service configuration methods, functions, and output, with only differences in the command keywords. For the differences in the command keywords, see M-LAG configuration in H3C S9820-8C & S9820-8C-SAN Ethernet Switches Layer 2—LAN Switching Configuration Guide.

M-LAG system setup flowchart

Figure4-1 M-LAG system setup flowchart

To set up an M-LAG system:

Step	Description
1. Plan for setting up the M-LAG system.	Plan for setting up the M-LAG system based on the network and device conditions: · Determine the installation locations of the switches. · Reserve physical ports for M-LAG connections. · Plan the cable connection scheme. For more information, see "Planning for setting up an M-LAG system."
2. Install M-LAG member switches.	See "Installing the switch in a 19-inch rack".
3. Connect grounding cable and power cords for the member switches.	See "Grounding the switch" and "Connecting the power cord."
4. Power on the switches.	N/A
5. Configure the M-LAG system settings.	For detailed information about M-LAG, see M-LAG configuration in H3C S9820-8C & S9820-8C-SAN Ethernet Switches Layer 2—LAN Switching Configuration Guide.
6. Connect the member switches.	Select cables or transceiver modules and optical fibers matching the rate of the physical ports of the peer link and keepalive link for connection.

Planning for setting up an M-LAG system

Determining device installation locations

An M-LAG system can be set up with only two devices. Reserve sufficient space in the rack for installation of the devices.

You can place the two switches in one cabinet. Alternatively, you can install the switches in two cabinets if you're seeking a top-of-rack access solution in the data center.

Reserving physical ports for M-LAG connection

To set up an M-LAG system, you must establish a peer link and a keepalive link between the two devices.

The M-LAG member devices exchange protocol packets and transmit data traffic over the peer link. An M-LAG system has only one peer link. You can create a peer-link interface on each M-LAG member device, and the link between the two peer-link interfaces is the peer link.

The M-LAG member devices exchange keepalive packets over the keepalive link to detect multi-active collisions when the peer link is down.

Peer link

In addition to protocol packets, the peer link also transmits data packets between the M-LAG member devices when an uplink fails. When you set up the peer link, follow these restrictions and guidelines:

· As a best practice, use interfaces on multiple interface expansion modules as member ports of the peer-link link aggregation group. Make sure at least one member port resides on a different slot than the uplink interfaces.

· The member ports in the aggregation group for the peer-link interface must have the same speed.

· If an M-LAG system is attached to a large number of servers by using non-M-LAG interfaces, take the size of the traffic sent among those servers into account when you determine the bandwidth of the peer link.

Keepalive link

The M-LAG member devices exchange keepalive packets over the keepalive link to detect multi-active collisions when the peer link is down.

As a best practice, establish a dedicated direct link between two M-LAG member devices as a keepalive link. Do not use the keepalive link for any other purposes. Make sure the M-LAG member devices have Layer 2 and Layer 3 connectivity to each other over the keepalive link.

You can use management Ethernet interfaces, Layer 3 Ethernet interfaces, Layer 3 aggregate interfaces, or interfaces with a VPN instance bound to set up the keepalive link.

As a best practice, do not use VLAN interfaces for keepalive link setup. If you have to use VLAN interfaces, remove the peer-link interfaces from the related VLANs to avoid loops.

Do not use the same module to provide interfaces for setting up the keepalive link and peer link.

Planning the cable connection scheme

Select cables or transceiver modules and optical fibers matching the rate of physical ports of the peer link and the keepalive link for connection.

Cables are short but with high performance and stability, suitable for short-distance connections in the equipment room. Transceiver modules and optical fibers can be combined flexibly and is suitable for longer distance connections.

For information about the transceiver modules and cables supported by the switch, see H3C S9820-64H & S9820-8C & S9820-8C-SAN Ethernet Switches Transceiver Module Compatibility Matrixes.

This following section describes several cable connection schemes that use QSFP28 cables and QSFP28 transceiver modules and optical fibers.

NOTE:

The physical port locations in the following figures are for illustration only.

Connecting the member switches in one rack

If two M-LAG member devices are installed in the same rack, use the following connection method to connect them as a best practice.

Figure4-2 Connecting two M-LAG member devices are installed in the same rack

Figure4-3 Connection topology of two M-LAG member devices in the same rack

Top of rack connection scheme

You can install M-LAG member switches in two different racks side by side to deploy a top of rack (ToR) solution as shown in Figure4-4. Use transceiver modules and optical fibers for connection if a large distance exists between the member switches.

Figure4-4 Top of rack connection scheme

Configuring the M-LAG system settings

After you install the M-LAG member switches, start and log in to each member switch to configure basic M-LAG system settings, including:

· M-LAG system MAC address.

· M-LAG system ID.

· M-LAG system priority.

· Peer-link interface settings.

· Keepalive parameters.

For information about logging in to the switch, see H3C S9820-8C & S9820-8C-SAN Ethernet Switches Fundamentals Configuration Guide.

For information about configuring the M-LAG system settings, see M-LAG configuration in H3C S9820-8C & S9820-8C-SAN Ethernet Switches Layer 2—LAN Switching Configuration Guide.

Restrictions and guidelines

You can set up an M-LAG system with only two member devices. For the M-LAG member devices to be identified as a single M-LAG system, you must configure the same M-LAG system MAC address and M-LAG system priority for them. To distinguish between the two member devices, assign them different M-LAG system IDs.

Make sure the MAC address of the M-LAG system is unique.

For correct packet forwarding, delete M-LAG configuration from an M-LAG member device if it leaves its M-LAG system.

When you bulk shut down physical interfaces on an M-LAG member device for service changes or hardware replacement, shut down the physical interfaces used for keepalive detection prior to the physical member ports of the peer-link interface. If you fail to do so, link flapping will occur on the member ports of M-LAG interfaces.

You must configure the keepalive link interfaces (including physical ports and logical interfaces) as M-LAG reserved interfaces. This ensures that these interfaces will not be MAD down when the peer link fails.

For more configuration restrictions and guidelines and typical configuration examples for the M-LAG system, see H3C Data Center Switches M-LAG Configuration Guide.

Connecting the M-LAG member switches

CAUTION:

Wear an ESD wrist strap when you connect the M-LAG member switches. Make sure the strap makes good skin contact and is reliably grounded.

Connect the M-LAG member switches based on the network topology and cable connection scheme. For the installation method and restrictions and guidelines for connecting cables or transceiver modules and optical fibers, see the installation guide for them.

Verifying the configuration

To verify the running status of the M-LAG system:

1. Create a Layer 3 interface on a member device, assign it an IP address, and make sure the device and the remote network management station can reach each other.

2. Use Telnet or SNMP to access the device remotely. For more information, see H3C S9820-8C & S9820-8C-SAN Ethernet Switches Fundamentals Configuration Guide.

3. Display the running status of the M-LAG system by using the display commands in any view.

Table4-1 Displaying and maintaining M-LAG system configuration and running status

Task	Command
Display M-LAG member device role information.	display m-lag role
Display M-LAG interface summary information.	display m-lag summary
Display M-LAG system information.	display m-lag system
Display detailed information about M-LAG interfaces.	display m-lag verbose [ interface interface-number ]

CAUTION:

· In an M-LAG system, all management Ethernet ports on the primary and secondary devices are available for use. From the perspective of the network management system, the two devices in the M-LAG system are independent and you must log in and manage them separately.

· To prevent network failures caused by M-LAG system splitting, configure HA after the M-LAG system is set up. For more information, see H3C Data Center Switches M-LAG Configuration Guide.

5 Maintenance and troubleshooting

Power supply failure

Symptom

The status LED on a power supply is not steady green (active state) or flashing green (standby state)

For more information about the power supply LED, see H3C S9820-8C & S9820-8C-SAN Ethernet Switches Hardware Information and Specifications.

Solution

To resolve the issue:

1. Verify that the power cord is connected correctly.

2. Verify that the power source is as required by the switch.

3. Verify that the operating temperature of the switch is in the acceptable range and adequate ventilation is available for the power supply.

4. If the issue persists, contact H3C Support.

To replace a power supply, see "Installing and removing ."

Configuration terminal display issues

No output

Symptom

The configuration terminal does not have any output when the switch is powered on.

Solution

To resolve the issue:

1. Verify that the power system is operating correctly.

2. Verify that the console cable is connected correctly.

3. Verify that the console cable does not have any problems and the terminal settings are correct.

4. If the issue persists, contact H3C Support.

Garbled output

Symptom

The output of the configuration terminal is garbled.

Solution

To resolve the issue:

1. Verify that configuration terminal settings are correct:

¡ Baud rate—9600.

¡ Data bits—8.

¡ Parity—None.

¡ Stop bits—1.

¡ Flow control—None.

2. If the issue persists, contact H3C Support.

H3C S9820-8C Switch Installation Guide-6W106

1 Preparing for installation

Safety recommendations

Grounding the switch

Installing/removing fan modules

Installing and removing power supplies

Connecting the power cord for a power supply

Connecting the console cable

Powering on the switch

4 Setting up an M-LAG system

Planning for setting up an M-LAG system

Peer link

Keepalive link

Connecting the member switches in one rack

Top of rack connection scheme

Configuring the M-LAG system settings

Configuration terminal display issues

Symptom

Solution

Garbled output

Symptom

Solution

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