q-Tech QSW-6900-56LF Series Installation and operating manual

Installation Manual
0. Preface 1
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QSW-6900-56LF Series Switches
Hardware Installation and Reference
Guide
QSW-6900-56LF

Installation Manual
0. Preface 2
www.qtech.ru
Copyright Statement
QTECH ©2020
QTECH reserves all copyrights of this document. Any reproduction, excerption, backup,
modification, transmission, translation or commercial use of this document or any portion of this
document, in any form or by any means, without the prior written consent of QTECH is
prohibited.
Exemption Statement
This document is provided “as is”. The contents of this document are subject to change without
any notice. Please obtain the latest information through the QTECH website. QTECH endeavors
to ensure content accuracy and will not shoulder any responsibility for losses and damages
caused due to content omissions, inaccuracies or errors.

Installation Manual
0. Preface 3
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PREFACE
Thank you for using our switches. This guide will help you install and use the switches.
Scope
This manual describes the functions and physical features of the switches, and presents the
installation procedure, troubleshooting procedure, technical specifications, and specifications
and usages rules of cables and connectors. It is intended for the users that have some experience
in installing and maintaining network hardware and want to learn the above information. At the
same time, it is assumed that the users of this switch are already familiar with the related terms
and concepts of Ethernet.
Obtaining Technical Assistance
❖QTECH Website: https://www.qtech.ru
❖Technical Support Website: https://helpdesk.qtech.ru
Related Documents
Documents
Description
Configuration Guide
Describes network protocols and related mechanisms that
supported by the product, with configuration examples.
Command Reference
Describes the related configuration commands, including
command modes, parameter descriptions, usage guides, and
related examples.
Symbol Conventions
Means reader take note. Notes contain helpful suggestions or references.
Means reader be careful. In this situation, you might do something that could result in
equipment damage or loss of data.

Installation Manual
1. Product Overview 4
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1PRODUCT OVERVIEW
QSW-6900-56LF switches are data center oriented high density 10G access switches, providing
10G/100G access, low latency, and complete data center features. QSW-6900-56LF switches,
with up to 48 10G ports and 8 100G ports, can be used to compose a high-performance and high-
reliability data center network.
The QSW-6900-56LF Series Switches:
Model
100G
QSFP28
Ethernet
Port
10G SFP+
Ethernet
Port
10GBase-T
Ethernet
Port
Extension
Module
Slot
Redundant
Fan
Redundant
Power
Supply
QSW-
6900-
56LF
8
48
N/A
N/A
3+1
1+1
An SFP+ port supports 10GBase-R and can be downward compatible with 1000Base-X.
A QSFP28 port supports both 100G/40G mode and 4x25G/4x10G mode.
Specifications
Model
QSW-6900-56LF
CPU
Quad-core processer, 1.2GHz
BOOT ROM
16MB
FLASH Memory
8GB
SDRAM
DDR4 4GB (Compatibility: 8GB)
Extension
Module Slot
Unsupported
Extension
Module
Unsupported
Fan Slot
4 (support 3+1 redundancy, configure at least 3 fan modules in one switch)
Fan Module
QSW-M-6900LF-FAN

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Power Supply
Slot
2 (support 1+1 redundancy)
Power Module
QSW-M-6900LF-PWR
Power Supply
Input
AC input
Rated voltage range: 100V AC to
240V AC
Maximum voltage range: 90V AC to
264V AC
Frequency: 50/60 Hz
Rated current: 3.5A to 7.2A
High voltage direct current (HVDC)
input:
Input voltage range: 192V DC to 288V
DC
Input current range: 3.6A
Power
Consumption
Less than 300 W
Optical Module
The supported modules update at any time, contact QTECH for details.
SFP+ Port
Supported
QSFP28 Port
Supported
FC Port
Unsupported
10GBASE-T Port
Unsupported
Temperature
Warning
Support temperature warning and over-temperature protection.
EMC Standards
GB9254-2008 CLASS A
Safety
Standards
GB4943-2011
Working
Temperature
0°C to 45°C (32°F to 113°F)
Storage
Temperature
-40°C to 70°C (-40°F to 158°F)
Working
Humidity
10% to 90% RH (non-condensing)
Weight
Net weight: 8 kg (including 4 fan modules and 2 power modules)

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Dimensions
(L x W x H)
442 mm x 387 mm x 44 mm, 1RU
QSW-6900-56LF switch is a class A product. In a domestic environment, this product may
cause radio interference in which case the user may be required to take adequate measures.
The 10G/100G Ethernet port of the QSW-6900-56LF switch supports DAC.
Product Appearance
The hardware of the QSW-6900-56LF includes the chassis, the power supply system and the heat
dissipation system.
❖The power supply system: Provides two power supply slots, which support 1+1 power supply
redundancy. It is recommended users configure power supply redundancy.
❖The heat dissipation system: Provides four fan module slots, which support 3+1 fan
redundancy. It is recommended users configure all fans redundancy.
Figure 1-1 Appearance of the QSW-6900-56LF
Front Panel
Figure 1-2 Front Panel of the QSW-6900-56LF
Notes:
1. Switch status indicator
2. Switch locator indicator
4. SFP+ port status indicator
5. QSFP28 port

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3. SFP+ port
6. QSFP28 port status indicator
The QSW-6900-56LF supports 100G QSFP28 module and 10G SFP+ module.
Back Panel
Figure 1-3 Back Panel of the QSW-6900-56LF
Notes:
1. Power supply module slot
2. Fan module slot
3. Locator indicator
4. MGMT port
5. USB 2.0 port
6. Grounding point
7. Asset label
8. Switch status indicator
9. Console port
Asset Management Label
The asset management label is next to the switch status indicator of the switch back panel. The
label is movable and can be withdrawn from the device. Users can mark the information such as
asset name, category, code and registration date on the label which helps to improve asset
management accuracy and efficiency.
Figure 1-4 Asset Management Label of the QSW-6900-56LF
External Ports
The QSW-6900-56LF provides the following ports:
❖Universal serial bus (USB) port: This port can connect with USB memory to save logs, host
versions, warnings and other diagnostic messages. Therefore, it is more convenient to
upgrade the software version of the switch on line and save the log information.

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To protect the data and avoid device damage, use qualified USB flash disks of good brands.
At the same time, the local USB port is compatible with most of the USB controllers except
some USB flash disks.
QSW-6900-56LF series switches support debugging, configuration, maintenance,
management and host software uploading of Console ports.
❖Console port: Use RS-232 interface electrical level and standard RJ45 connector. This
interface is connected with the serial port of terminal PC to perform system debugging,
configuration, maintenance, management, and host software uploading.
❖MGMT port: This is an out-band Ethernet port, which uses standard RJ45 connector. This
interface is connected with Ethernet port of a PC to perform program downloading.
❖SFP+ port: There are 48 10G SFP+ ports, which support optical modules and DAC copper
cables (1000BASE-X compatible).
❖QSFP28 port: There are 8 100G QSFP28 ports, which support optical modules and DAC
copper cables. These ports can also work in 4x10G mode.
Indicator
Indicator
Panel
Identificati
on
Status
Meaning
Switch status
indicator
(Front panel/Back
panel)
Status
Off
The system is not powered up.
Solid red
One of the modules of the system fails.
There are less than 3 fans.
The internal or partial temperature exceeds
the warning working temperature, and the
switching service resets.
Blinking green.
The system is initializing.
Solid green
The system is operational.
Solid yellow
The temperature gets to the warning
threshold.
Only 3 fans are in the position.
One of the dual powers is not connected
with the AC power cord.
Switch locator
indicator
(Front panel/Back
panel)
ID
Off
Device location is disabled.
Solid blue
Device location is enabled.

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MGMT port
indicator
MGMT
Off
The port is not connected.
Green
The port is connected at
10M/100M/1000Mbps.
Blinking
The port is transmitting or receiving data.
SFP+ port status
indicator
1F-48F
Off
The port is not connected.
Solid green
The port is connected at 10Gbps.
Blinking green
The port is transmitting or receiving data at
10Gbps.
QSFP28 port status
indicator
49F-56F
Off
The port is not connected.
Solid green
The port is connected at 40G/100Gbps.
Blinking green
The port is transmitting or receiving data at
40G/100Gbps.
Power Supply
The QSW-6900-56LF series switches support power supply the QSW-M-6900LF-PWR. The smart
power supply module supports power management, and the host can read input power, input
current, and temperature in real time. The power supply module supports hot swapping.
The QSW-6900-56LF series switches support 1+1 power supply redundancy. To improve the
stability and reliability of the entire system, it is recommended to configure 1+1 power
supply redundancy. When the two power supply modules work normally, the switch is in the
status of current sharing.
It requires at least one power supply module to work normally. Filler panels need to be
installed in the unoccupied power supply module slots to ensure ventilation and heat
dissipation and avoid dusts.
Heat Dissipation
The working temperature of the QSW-6900-56LF switches is 0°C to 45°C, or 32°F to 113°F, and
the heat dissipation design needs to ensure the stability, safety and maintainability in such
environment. The QSW-6900-56LF series switches adopt fan ventilation and forced convection
to ensure the device can work normally in specified environment. Dust the device every three
months to avoid blocking the ventilation openings.
The QSW-6900-56LF supports QSW-M-6900LF-FAN and provides fan speed regulation, fan
failure warning, and fan hot swapping.
Figure 1-5 Ventilation and Heat Dissipation of the QSW-6900-56LF

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Figure 1-6 Ventilation and Heat Dissipation of the QSW-6900-56LF
Leave sufficient space in the front and at the back of the chassis (at least 20 cm) for
ventilation.
It requires at least three fan modules to work normally. Filler panels need to be installed in
the unoccupied fan module slots to ensure ventilation and heat dissipation and avoid dusts.
Power modules and fan modules with different air direction cannot be used together.

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2. Preparation before Installation 11
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2PREPARATION BEFORE INSTALLATION
2.1 Safety Precautions
To avoid body injury and device damage, please carefully read the safety precautions before
you install the QSW-6900.
The following safety precautions do not cover all possible dangers.
2.1.1 Installation Safety
❖Keep the chassis clean and dust-free.
❖Do not place the device in walking areas.
❖Do not wear loose clothes, ornaments or any other things that may be hooked by the chassis
during the installation and maintenance.
❖Turn off all power supplies and unplug all power cords and cables before the installation or
the dismantling.
2.1.2 Removal Safety
❖Avoid frequent removals after the device is installed.
❖Turn off all power supplies and unplug all power cords and cables before the installation or
the dismantling.
❖When removing the device, pay attention to the balance and avoid hurting legs and feet or
straining the back.
When the device is being removed, do not hold the power supply handle or the fan handle
for these parts are not designed for bearing the entire weight of the device. It will cause
damage to the device or to your body if you hold these parts when removing the device.
To reduce the weight of the chassis during the removal, dismantle the extension module, fan
module and the power supply module first.
Install and operate the device in places where removing is restricted.
2.1.3 Electric Safety
❖Observe local regulations and specifications when electric operations are performed.
Relevant operators must be qualified.
❖Carefully check any potential danger in the working area, such as ungrounded power supply,
unreliable grounding of the power supply, and damp/wet ground.
❖Find out the location of the emergency power supply switch in the room before installation.
First cut off the power supply in the case of an accident.
❖Be sure to make a careful check before you shut down the power supply.
❖Do not place the device in a damp location. Do not let any liquid enter the chassis.
Any nonstandard and inaccurate electrical operation can cause accidents such as fires or
electrical attacks, thus causing severe, or even fatal damages to human bodies and the
devices.

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Direct or indirect touch through a wet object on high-voltage and mains supply can bring a
fatal danger.
2.1.4 Electrostatic Discharge Damage Precautions
The QSW-6900-56LF designing gives a great consideration to prevent electrostatic discharge
damage and adopts multiple measures. But if the electrostatic exceeds certain limit, it can still
cause great damages to the circuitry and the device. In networks connected by the QSW-6900-
56LF, the major sources of electrostatic induction are outdoor high voltage transmission cables,
lightening, indoor floor materials and the machine structure.
Pay attention to the following tips:
❖The device and the floor are well grounded.
❖Take dust prevention measures in the room.
❖Maintain an appropriate humidity.
❖When the pluggable modules of the switch are being installed, wear antistatic wrist strap
and make sure the antistatic wrist strap is well grounded.
❖Do not use bare hand to directly touch the components and the printed-circuit board (PCB)
when the boards are used.
❖Use an anti-static shielding bag to properly store the board.
❖Do not let any clothes touch a circuit board. An antistatic wrist strap can only prevent human
static electricity from damaging the circuit board, but cannot prevent any static electricity
on clothes.
2.1.5 Laser Safety
Among the modules supported by the QSW-6900-56LF, there are a great number of optical
modules that are Class I laser product.
Precautions:
❖When a fiber transceiver works, ensure that the port has been connected with a fiber or has
been covered by a dust cap so as to keep out dust and prevent it from burning your eyes.
❖Do not stare at any fiber port.
Do not stare at any fiber port under any circumstances, as this may cause permanent damage
to your eyes.
2.2 Installation Site Requirements
Install the QSW-6900-56LF indoor. To ensure normal operation and a prolonged service life of
the device, the installation site must meet the following requirements.
2.2.1 Rack Mounting Requirements
Make sure the cabinet complies with the following conditions if the QSW-6900-56LF is installed
in the cabinet:
❖Install the switch in an open cabinet as much as possible. If you install the switch inside a
closed cabinet, be sure that the cabinet has a good ventilation and heat dissipation system.

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❖Be sure that the cabinet is firm enough to bear the weight of the QSW-6900-56LF and its
installation accessories.
❖Be sure that the dimensions of the cabinet is appropriate for installation of the QSW-6900-
56LF that can reserve a certain space for the front, back, left and right panels for heat
dissipation.
❖The cabinet should be properly grounded.
2.2.2 Ventilation Requirements
For the QSW-6900-56LF series products, leave sufficient space in the front and at the back of the
chassis (at least 20cm) for ventilation. After various cables are connected, bundle the cables or
place them in the cable management bracket to avoid blocking air inlets. Dust the device every
three months to avoid blocking the ventilation openings.
2.2.3 Temperature and Humidity Requirements
To ensure the normal operation and a prolonged service life of the QSW-6900-56LF, maintain an
appropriate temperature and humidity in the equipment room. The equipment room with too
high or too low temperature and humidity for a long period of time may damage the equipment.
❖In an environment with high relative humidity, the insulating material may have bad
insulation or even leak electricity. And sometimes the materials may suffer from mechanical
performance change and metallic parts may get rusted.
❖On the other hand, in an environment with low relative humidity, the insulating strip may
dry and shrink, and static electricity may occur easily and endanger the circuit on the device.
❖In an environment with high temperature, the equipment is subjected to even greater harm,
as its performance may degrade significantly and its service life may be shortened at high
temperature for long that expedites the aging process.
Temperature and humidity requirements of the QSW-6900-56LF:
Model
Working Temperature
Working Humidity
QSW-6900-56LF
0ºC to 45ºC / 32ºF to 113ºF
10% to 90%
The ambient temperature and humidity are measured at the point that is 1.5 m above the
floor and 0.4 m before the device when there is no protective plate in front or at the back of
the device rack.
2.2.4 Cleanness Requirements
Dust poses the top threat to the running of the device. The indoor dust falling on the device may
be adhered by the static electricity, causing poor contact of the metallic joint. Such electrostatic
adherence may occur more easily when the relative humidity is low, not only affecting the
service life of the device, but also causing communication faults. The following table shows the
requirements for the dust content and granularity in the equipment room.

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Substance
Concentration Limit
(particles/m3)
Dust particles (diameter ≥0.5μm)
≤3.5×106
Dust particles (diameter ≥5μm)
≤3×104
Apart from dust, the salt, acid and sulfide in the air in the equipment room must also meet strict
requirements; as such poisonous substances may accelerate the corrosion of the metal and the
aging of some parts. The equipment room should be protected from the intrusion of harmful
gases (for example, SO2, H2S, NO2and Cl2), whose requirements are listed in the following table.
Gas
Average (mg/m3)
Maximum (mg/m3)
SO2
0.3
1.0
H2S
0.1
0.5
NO2
0.5
1.0
Cl2
0.1
0.3
The Average refers to the average limit of harmful gas in one week. The Maximum value is
the upper limit of the harmful gas in one week, and maximum value can last for up to 30
minutes every day.
2.2.5 System Grounding Requirements
A good grounding system is the basis for the stable and reliable operation of the QSW-6900-
56LF. It is the key to prevent lightning stroke and resist interference. Please carefully check the
grounding conditions on the installation site according to the grounding requirements, and
perform grounding properly as needed.
Safety Grounding
The device using AC or HVDC power supply must be grounded by using the yellow/green safety
grounding cable. Otherwise, when grounding fault happens in the high voltage circuit inside the
device, electric shock may occur.
The building installation shall provide a means for connection to protective earth, and the
device is to be connected to that means.
Lightning Grounding
The lightning protection system of the facility is an independent system that consists of the
lightning rod, down lead conductor and the connector to the grounding system, which usually
shares the power reference ground and yellow/green safety cable ground. The lightning
discharge ground is for the facility only, not for the device.

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For lightning protection, refer to Appendix C.
EMC Grounding
The ground required for EMC design includes shielding ground, filter ground, noise and
interference suppression, and level reference. All the above constitute the comprehensive
grounding requirements. The grounding resistance should be less than 1Ω. There is one
grounding connector at the right bottom of the chassis of QSW-6900-56LF series switches. The
grounding connector is pasted with conspicuous warning labels.
Figure 2-1 EMC grounding
2.2.6 EMI Consideration
Various interference sources, from either outside or inside the device or application system,
affect the system in the conductive ways such as capacitive coupling, inductive coupling, and
electromagnetic radiation. There are two types of electromagnetic interferences: radiated
interference and conducted interference, depending on the type of the propagation path. When
the energy, often RF energy, from a component arrives at a sensitive component via the space,
the energy is known as radiated interference. The interference source can be either a part of the
interfered system or a completely electrically isolated unit. Conducted interference results from
the electromagnetic wire or signal cable connection between the source and the sensor.
Interference along the cable the interference is transmitted from one unit to another. Conducted
interference often affects the power supply of the device, but can be controlled by a filter.
Radiated interference may affect any signal path in the device, and is difficult to shield.
❖Effective measures should be taken for the power system to prevent electric grid
interference.
❖The working ground of the routers should be properly separated and kept as far as possible
from the grounding device of the power device or the anti-lightning grounding device.
❖Keep the device away from high-power radio transmitter, radar transmitting station, and
high-frequency large-current device.
❖Measures must be taken to isolate static electricity.

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2.3 Precaution for Fiber Connection
Before connecting the fibers, you should ensure that the type of optical connector and the type
of fibers match the type of the optical interface used. Moreover, you should pay attention to the
Tx and Rx directions of the fiber. The Tx end of this device should be connected to the Rx end of
the peer device, and the Rx end of this device to the Tx end of the peer device.
2.4 Installation Tool
Common Tools
Cross screwdrivers, related electric and optical cables, bolts, diagonal
pliers, straps
Special-purpose Tools
Anti-static gloves, stripping pliers, crimping pliers, crystal head crimping
pliers, wire cutters
Fiber optic cleaning
Tools
Air-laid paper, fiber end microscope
Meter
Multimeter, errormeter, optic-power meter
QSW-6900-56LF series is not shipped with a tool kit. You need to prepare a tool kit by
yourself.
2.5 Unpacking and Checking
Goods Checklist
Chassis
Carton
Chassis, Yellow/green grounding cables; Quick installation guide; Packing list,
Pouched documents
Module
Carton
Various modules; Packing list; Quick installation guide
A normal delivery should contain the above mentioned items, which may differ from the
actual delivery, depending on purchase contracts. Please check your goods carefully
according to the packing list or purchase contract. If you have any questions or there are any
errors, please contact your distributor.

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3PRODUCT INSTALLATION
QSW-6900-56LF series Ethernet switch must be used and fixed in the room.
Make sure you have carefully read part 2, and be sure that the requirements set forth in part
2 have been met.
3.1 Installation Procedure
3.2 Installation Verification
Carefully plan and arrange the installation location, networking mode, power supply, and wiring
before installation. Verify the following requirements before installation:
❖The installation location provides sufficient space for heat dissipation.
❖The installation location meets the temperature and humidity requirements of the
equipment.
❖The qualified power supply and current required are available at the installation location.
Preparation
Install the cabinet
Mount the device into the cabinet
Ground the system
Insert various modules
Connect external port cables or fibers of various modules
Bind cables or fibers
Installation check
End
Connect the power supply

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❖The related network cables have already been deployed at the installation location.
3.3 Cabinet Installation
Precautions
When you install the cabinet, pay attention to the following requirements:
❖All expansion bolts for fastening the cabinet base to the ground should be installed and
tightened in sequence from bottom up (large plain washer, spring washer, and nut), and the
installation holes on the base and the expansion bolts should be well aligned.
❖After the cabinet is installed, it should be stable and still.
❖After the cabinet is installed, it should be vertical to the ground.
❖When multiple cabinets are placed side by side in the room, they should be aligned in a
straight line, with an error less than 5 mm.
❖The front/back doors of the cabinet should be properly installed. You can open and close
them smoothly. The locks should work normally, and all keys should be complete.
❖There should be no unnecessary and informal labels inside the cabinet and on various
boards.
❖Blank panels should be installed completely.
❖Fastening screws of various devices in the cabinet of the same model should be ready and
tightened.
❖Various boards of the equipment should be installed securely, and the fastening screws on
the panel should be tightened.
❖All wiring inlets at the top and bottom of the cabinet should be installed with rodent-
resistant nets with seams no more than 1.5 cm in diameter, to prevent rodents and other
small animals from entering the cabinet.
❖Antistatic wrist straps should be provided in the cabinet.
Installation Steps
1. Plan the available space before installing the cabinet. You must reserve sufficient space for
front and back doors for maintenance.
2. Mount and fasten the cabinet at the designed location as planned.
3. Install the appropriate chute and cables.
4. Install the tray and wiring layer on the rack according to the configuration of one rack with
one cabinet installed or one rack with multiple cabinets installed.
3.4 Mounting into the Cabinet
Precautions
Before mounting QSW-6900-56LF into the cabinet, first verify that the front and back brackets
of the cabinet are at the right locations. If the bracket is too far forward, the front panel of the
equipment may be too close to the front door, so that the front door cannot be closed when the
equipment is connected with network cables and pigtail fibers. Usually, you should reserve space
of at least 10mm between the front panel of the equipment and that of the cabinet after
installation. Before mounting into a cabinet, you need to make sure the following conditions are
met:

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❖Fasten the cabinet.
❖Insert various modules in the frame properly.
❖Remove any obstacle in the frame and the surrounding environment.
❖Prepare the equipment to be installed and move it to the place near the cabinet where you
can handle it easily.
Installing Mounting Brackets
Take out the two L-shape brackets and eight M4*8FMO countersink screws from the plastic
package.
Install the brackets at the side panels of the switch, and fix the brackets with four M4*8FMO
countersink screws at each side.
Figure 3-1 Installing Mounting Brackets
Mounting the Switch to a Rack
The QSW-6900-56LF series switches are qualified for EIA standard and can be installed in 19-inch
wiring cabinet. During the process of installation, keep the front panel of the switch forward. It
is recommended use tray to install the QSW-6900-56LF series switches and fix the tray on the
bracket, or use the rear bracket provided with the switches.
Figure 3-2 Mounting the Switch to a Rack

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The mounting brackets are located at the four of the six screw holes at both sides on the
back panel of the host.
Distinguish the left and the right rear brackets according to the marked directions.
The rear brackets provided are only applicable for cabinets with depth of 800mm - 1200mm.
Mounting the Switch to a Workbench
In some cases, users do not have the 19-inch standard cabinet. The common solution is to place
the switch on a clean workbench. The operation is simple as follows:
Attach the four rubber pads to the four corners on the switch bottom.
Place the switch on the workbench and ensure good ventilation condition around the switch.
Figure 3-3 Mounting the Switch on a Workbench