FS S3950-4T12S-R User manual

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S3950-4T12S SWITCH WEB MANAGEMENT GUIDE
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S3950-4T12S-R Switch
Install Guide
Model: S3950-4T12S-R

S3950-4T12S-R SWITCH INSTALL GUIDE
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Contents
1. Overview...............................................................................................................................................................................................................................3
1.1 Product Model...........................................................................................................................................................................................................................................3
1.2 Front Panel................................................................................................................................................................................................................................................. 3
1.3 Rear Panel................................................................................................................................................................................................................................................... 3
2. Installation............................................................................................................................................................................................................................4
2.1 Preparation for Installation................................................................................................................................................................................................................... 4
2.2 Packing List.................................................................................................................................................................................................................................................5
2.3 Installation.................................................................................................................................................................................................................................................. 5
2.4 Grounding Connection.........................................................................................................................................................................................................................7
3. Interface Module and Cable Connection Description....................................................................................................................................................8
3.1 Interface Module Description............................................................................................................................................................................................................8
3.2 Recommended Interface Module...................................................................................................................................................................................................... 8
4. Initial Power-on & Start-up of Switch............................................................................................................................................................................... 9
4.1 Building Configuration Platform and Connecting Cable.......................................................................................................................................................... 9
4.2 Setting Terminal Parameter (Windows super terminal):........................................................................................................................................................... 9
4.3 Switch Power-on......................................................................................................................................................................................................................................9
5. Upgrade of uBoot..............................................................................................................................................................................................................10
6. Upgrade of Operating System.........................................................................................................................................................................................11
7. Maintenance and Troubleshooting................................................................................................................................................................................12
7.1 Loading Failure Processing:..............................................................................................................................................................................................................12
7.2 User Password Lost..............................................................................................................................................................................................................................12
7.3 Power System Troubleshooting:.......................................................................................................................................................................................................12
7.4 Configuration System Troubleshooting:.......................................................................................................................................................................................12
8.Instructional safeguard..................................................................................................................................................................................................... 13

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1. Overview
The S3950-4T12S-R 12-Port Ethernet layer 2+ switch features 12x 10Gb SFP+ and 4x 10/100/1000BASE-T. This managed enterprise switch
delivers 248 Gbps switching capacity and 184.5 Mpps forwarding rate for superior processing performance and network reliability. With
comprehensive Layer 2 function, MLAG, ARP, VRRP, Static Routing, and a suite of security and management features, S3950-4T12S-R is
ideal for large-scale campus network accesses, small and medium-sized network cores and aggregations to meet the needs of high-
speed, safe, intelligent enterprise networks and Internet bar market, and can be used for scenarios that require high-speed transmission
and long-distance connectivity, such as data centers, remote offices and WAN extensions.
1.1 Product Model
S3950 Series Routing Switch size & weight
ITEM S3950 -4T12S-R
SIZE(HxWxD) 40x440x220 mm
WEIGHT 2.80KG
1.2 Front Panel
Front Panel Sketch Map of S3950-4T12S-R
1: Power LED
2: System LED
3: Ports Status LED
4: Management Ethernet Interface (ETH) Status LED
5: 1G Base-T ports
6: 10G SFP+ ports
7: Management Ethernet Interface (ETH)
8: RJ45 Console Port (CON)
1.3 Rear Panel
Rear Panel Sketch Map of S3950-4T12S-R
1: Grounding Screw
2: Single built-in AC power supply

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2. Installation
2.1 Preparation for Installation
2.1.1 Safety Precaution
The following precautions should be followed to avoid equipment damage and personal injury caused by improper use:
Power source should be removed before cleaning switches.
Do not use wet rags to wipe switches and clean switches with liquid.
Do not place switches near water or in a wet environment, and prevent water or moisture from entering switch chassis.
Do not place switches on an unstable case or table, since the dropping would cause serious harm to switches.
Maintain good indoor ventilation and clear air holes of switches.
Switches shall work normally under correct voltage, so make sure the operating voltage agrees with the voltage marked on switches.
To reduce the risk of electric shock, do not remove its enclosure when a switch is working, and don’t do so at will even if it is not powered.
Anti-static gloves must be worn when replacing interface board to prevent static electricity from damaging veneer.
During equipment transport and installation, prevent the equipment from colliding with objects like doors, walls, or shelves.
Do not touch unpainted metal surfaces of equipment components with wet or contaminated gloves.
Do not place other objects on the chassis.
2.1.2 Installation Site
To ensure a normal work environment, S3950 series switches should have the following requirements for workplace:
Ensure that there are some spaces at the inlet and outlet of switch for heat dispersion of switch chassis.
Ensure that rack and working platform have good ventilation and heat dispersion systems.
Ensure that rack and working platforms are firm enough to support the weight of a switch and its accessories for installation.
Ensure rack and working platforms are well earthed.
To ensure switches maintain a long-term stable work, the installation workplace should also meet the following requirements:
Temperature:0～45℃
Humidity:10%～95%
2.1.2.1 Cleanliness Requirements:
Dust is a big hazard to the safe operation of switches. Indoor dust falling on the switch body can cause electrostatic adsorption to make
poor contact of metal connectors or metal contacts. Especially when the indoor relative humidity is lower, electrostatic adsorption is easily
formed, which will not only affect equipment service life, but also easily lead to communication failure.
Dust Content Requirements in Switch Room
Unit:Particle/m3
Concentration limit:≤ 3 X 104 (No visible dust on the tabletop for three days)
Note: The dust particle size is ≥ 5 μm
Besides dust, there are rigorous limits on the content of harmful substances that can accelerate the corrosion and aging of metals, such as
salts, acids, and sulfides in the air in the equipment room, and the equipment room must be protected against ingression of harmful gases
such as SO2, H2S, NH3, and Cl2. For the specific requirement, see the following table.
GAS
Maximum concentration (mg/m3)
OS2 0.2
H2S
0.006
NH3 0.05
CI2
0.01
2.1.2.2 Electromagnetic Susceptibility
Switches may be affected by the interferences from outside the system, which will have an effect on devices through conduction of
capacitance coupling, inductive coupling, electromagnetic wave radiation, common impedance (including ground system) coupling and
wires (power wire, signal wire and output signal wire, etc.). The following attention should be paid to:

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AC power supply system is TN system, and AC power socket should be single-phase 3-wire outlet with protective earth (PE) so that filter
circuit on devices can effectively filter interference from electric grid.
Places where switches work should be kept away from strong-power radio transmitting station, radar transmitting station, high-frequency
high-current devices.
Electromagnetic shielding should be adopted when necessary, i.e. interface cables use shielded cables.
Interface cables are required to be arranged indoors instead of outdoors to prevent signal ports of devices from being damaged by over
voltage and over current generated from lightning.
2.1.2.3 Laser Use Safety
S3950 series switches are Class 1 laser devices.
Do not stare at the optical interfaces directly when the optional optical interfaces of S3950 series switches are in operating mode, since
light beam emitting from fiber has high energy which may be harmful to retina.
2.1.3 Installation Tool
Prepare the following tools before installation:
Flathead screwdrivers
Phillips screwdrivers
ESD-preventive wrist strap
The installation tools are not provided with S3950 Series Switch.
2.2 Packing List
1. S3950 Series Routing Switch: 1pc;
2. Power cable: 1-2pcs; 1.8M ; 0.75mm2; 250V/10A; Packing with 1 cable for single AC models; Packing with 2 cables for dual AC models.
Notice: there is no cable for DC models by default.
3. Console cable: 1pc; DB9 to RJ45; 1.5M
4. Ethernet cable: 1pc; Cat 5e; 1.5M
5. Grounding cable: 1pc; 0.5M
6. Screw: 6-8pcs; M4; Use this M4 screws to fix Front Mounting Brackets and switch. 6 screws for S3950-4T12-R and 8 screws for other
models. Need M6 screws to fix Front Mounting Brackets and rack(There’s no M6 screws in the package by default)
7. Adhesive pedestal: 4pcs; 12.7*3.5mm
8. Mounting bracket: 2pcs; 80*43.6*20.3mm or 43*43*21mm; 43*43*21mm is for S3950-4T12-R
9. Warranty card: 1pc;
10. Certificate of qualification: 1pc;
2.3 Installation
S3950 series switches can be installed in the following 2 ways:
Install the Switch into a Rack with Front Mounting Brackets (19” standard rack)
Install the Switch on a Workbench
2.3.1 Introduction of Mounting Brackets
Mounting Brackets(S3950 )
Appearance Sketch Map of Front Mounting Brackets (left side of the device)
Description:
(1): Screw hole for fixing Front Mounting Brackets and rack (Using M6 screw)
(2): Screw hole for fixing Front Mounting Brackets and switch (Using M4 screw)

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Front Mounting Brackets are only used to fix switches, but unable to bear the weight.
Figure 2-1 shows the mounting bracket for the left side of the device (The device is right side up, we define the side with interface as “front”
and the side with fan and power module as “Rear”). The mounting bracket for the right side is symmetric with the one for the left side.
Mounting Brackets for S3950-4T12X are similar with the one in Figure 2-1, which shape is like the character “L”. Left and right Mounting
Brackets for S3950-4T12-R are equal.
2.3.2 Introduction of Mounting Brackets Install the switch into a Rack with Front Mounting Brackets
Installation Process(S3950 )
Wear ESD-preventive wrist strap, and check the grounding and stability of rack.
Fix the tray to a proper position of rack horizontally.
Take out screw (complete package with front hangers), and install one end of the Front Mounting Brackets on switch.
Installation Sketch Map of Front Mounting Brackets
Place switch on the tray horizontally, push it slightly into the rack along the tray, and fix the other end of Front Mounting Brackets upon the
front hold strip of rack using screw and its matching floating nut.
Installation Sketch Map of Front Mounting Brackets with Tray
2.3.3 Install the Switch on a Workbench
In many cases, users do not have a standard 19” rack, so people often place switches on a cleaning working platform. Such operation is
relatively simple, and the only following aspects should be concerned during operation:
Ensure the working platform is stable and well earthed.
A 10 cm space around switch is left for heat dissipation.
Do not place heavy objects on switches.
There are 4 foot pads that come with the device. Paste them onto the bottom near the corners of the switch, as shown below:
Installation Sketch Map of the foot pads
2.3.4 Installation and Removal of Power Module
Installation Process
The power modules for S3950 series switches (24X2C / 24X2Q / 48T4X / 48S4X / 16T16XY2Q) are pluggable. Installation process of power
modules is as follows:
Wear ESD-preventive wrist strap, and confirm that the anti-static wrist strap is well earthed.
Maintain correct up-down direction of power module (in line with the positive direction of characters, if turned upside down, the power
module cannot be inserted to the end due to structural limit specially designed inside chassis).
Grip the handle on the front end of power module to be installed with one hand and support the bottom of power module with another
hand, and insert the power module by smoothly sliding along the power slot until the plug of power module comes into full contact with
the socket inside chassis.
Tighten the screws of the Power Supply Unit
Installation Sketch Map of AC power module
Description:
(1): Handle of the Power Supply Unit
(2): The screws to fix the Power Supply Unit.
2.3.5 Removal Process
The power modules for S3950 series switches are pluggable. Removal process of power modules is as follows:
Wearing anti-static wrist strap, and confirm that the anti-static wrist strap is well earthed.
Disconnect all power connectors of the switch.
Loosen the screws of the Power Supply Unit
Hold the handle of the Power Supply Unit with one hand and press on the top of the switch with another hand.
Pull out the power module by smoothly sliding along the power slot until the plug of power module is completely separated from the
socket inside chassis.
Removing Sketch Map of AC power module
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The S3950 switch can be installed with two power supply modules as hot backup. When one of the two power modules failure, user can
replace the bad power module on line (Without interruption for Switch power supply).
2.4 Grounding Connection
A noise filter is connected on the power input of switch, whose central earthing is connected directly to the cabinet, which is called
enclosure earthing (that is PE). This cabinet must be well grounded to enable the safe flow of influence electricity and leakage into the
earth and increase the anti-electromagnetic interference of switch.
Correct way of Grounding is as follows:
Connect one end of the yellow and green PE cable of switch to the terminal of grounding bar and screw up the fastening nut when there is
a grounding bar in the installation environment of Ethernet switches.
Note:
It is an incorrect option to be grounded with fire mains and a lightning rod in a building, so the ground wires of Ethernet switches should
be connected to the works in switch room and grounded.
Grounding Installation Sketch When A Grounding Bar is in Switch Room
Description:
(1): Ground terminal of switch
(2): Protective grounding cable
(3): Grounding bar of the switch room
The ground connection of Switch is very important for lightning and anti-interference protection, so please user must connect the
grounding wire correctly.
The grounding connection figure provided in this guide is for reference only, please following the real installation situation to connect the
grounding wire of the Switch correctly.

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3. Interface Module and Cable Connection Description
3.1 Interface Module Description
Ethernet Port
S3950 series switches are integrated with out-of-band Ethernet ports whose interfaces are 100/1000 Base-T. It is recommended to use the
net line included.
Console Port
Console port uses an 8-pin RJ-45 connector. When connecting the console port of switch to a computer, we need an RJ-45-to-DB-9 adapter
cable. It is recommended to use the serial line enclosed in the installation package.
DB9 to RJ45 console cable
Specific pin information can be found in the table below:
RJ-45-to-DB-9 cable sequence
3.2 Recommended Interface Module
To ensure device compatibility，and make it work at its optimum performance，we recommend that you use the interface module
provided by original vendor.
If you use other interface modules, you may have the following problems:
Some unauthenticated interface modules do not conform to the MSA protocol, causing a port to be inserted into the optical module and
its adjacent port cannot be inserted into the optical module. The golden finger of some unauthenticated interface modules is not
reasonable, resulting a short circuit in the interface.
Some unauthenticated optical modules are not properly designed in the data bus, which can lead to the abnormal data of the device bus,
and even the data on the data bus cannot be read again.
Some unauthenticated optical modules are not reasonable in temperature monitoring, leading to incorrect temperature alarm information
on the system. Or the operating temperature range of the interface module does not meet the requirements, and the low power of the
high temperature times even leads to business interruption.
Some unauthenticated optical modules are not reasonable in register setting, so the data bus cannot read the parameters and diagnostic
information correctly.
Some unauthenticated optical modules are not designed to satisfy EMC, not only meet the electromagnetic interference, but also influence
the surrounding equipment.

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4. Initial Power-on & Start-up of Switch
4.1 Building Configuration Platform and Connecting Cable
Building Local Configuration Platform Through Console Port
Connect DB-9 hole-type plug of configuration cable to the serial port for configuring switch.
Connect RJ-45 end of configuration cable to the console port of switch.
Please use the DB-9 to RJ-45 Console cable which we provide together with this device.
Use the DB-9 to RJ-45 Console cable from other vendors maybe can’t access this device.
4.2 Setting Terminal Parameter (Windows super terminal):
Turn on PC and run emulator program (eg. Windows system has its own super terminal) on PC.
Set terminal parameters (take the super terminal setting of Windows XP as an example).
Click "Start Program Attachment Communication Super Terminal" to enter the Super Terminal window and establish a new connection,
then a connection description interface will pop up as the following figure show.
Type the name of the new connection in the Name text box (For example: Network) and click OK. The following dialog box appears. Select
the serial port to be used from the Connect using drop-down lists.
When the Network Properties dialog box is displayed as shown in following figure. Set Bits per second to 115200, Data bits to 8, Parity to
None, Stop bits to 1, and Flow control to None. (In other Windows operating systems, bits per second may be described as baud rate and
data stream control may be described as traffic control.)
Click OK after setting the serial port parameters and the system enters the Hyper Terminal window.
Click Properties in the Hyper Terminal window to enter the Network Properties dialog box. Click the Settings tab, set the emulation to
VT100, and then click OK.
Please use the DB-9 to RJ-45 Console cable which we provide together with this device.
Use the DB-9 to RJ-45 Console cable from other vendors maybe can’t access this device.
4.3 Switch Power-on
After the switch is powered on and starts up, self-check information on equipment will display on the terminal. Users are prompted to type
Enter after self-check, then command line DOS prompts (such as (Switch)) will appear.
Type a command, configure Ethernet switches or view the running state of Ethernet switches. Enter "?" whenever you need a help. See the
subsequent chapters of this manual for specific configuration commands.

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5. Upgrade of uBoot
The traditional switch software loading is serial loading, but it is slow and time-consuming, and it cannot realize remote loading and is
inconvenient for operation. To address these problems, TFTP module is introduced to switch to facilitate software loading and file
download via Ethernet. Specific operations are as follows:
Enter uBoot operation mode
To enter uBoot operation mode, press the combined key Ctrl + b during the switch startup when “Press ctrl + b to stop autoboot:” is
prompted; startup information is as follows:
Restarting system.
U-Boot 3.0.2 (Development build) (Build time: May 10 2011 - 17:14:19)
P1010 board revision major:1, minor:0, serial #:
P1010 pass 1.1, Core clock: 533 MHz, DDR clock: 265 MHz (530 Mhz data rate)
Board descriptor tuple not found in eeprom, using defaults
DRAM: 1 GB
Clearing DRAM...... done
Flash: 2 GB
BIST check passed.
Net: octeth0, octeth1
Press ctrl+b to stop autoboot: 3 – Press Ctrl + b to enter uBoot operation mode
Identify a PC as loading server, connect the administration port of switch and the PC with net line; set IP address of the PC and
administration IP address of the switch for the same network segment; specific operations are as follows:
Use the command help open_all to open all commands;
Use the command setenv ipaddr address to set the administration IP address of the switch; the switch will copy image files to the switch
from TFTP server using this address;
Use the command setenv serverip address to set the IP address of TFTP server; the switch will copy image files from this TFTP server; Use
the command ping to check if the switch communicates with the loading server;
Can use the command printenv to view the current environment variables of switch;
Can use the command saveenv to save the current environment variables of switch to FLASH;
Can use the command reenv to restore the environment variables of switch to default value.
Run TFTP Server program on PC as a server, and set the directory where loading files are located; uBoot file supposed to be upgraded is
u_boot_v1.0.bin.
Run the command upgrade_uboot u_boot_v1.0.bin to upgrade uBoot; here the filename is u_boot_v1.0.bin.
Run the command reset to complete the upgrade of uBoot.

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6. Upgrade of Operating System
S3950 Series Ethernet Switches can support new features and enhance system performance without replacing hardware by upgrading the
operating system.
Upgrade Operating System
Copy the upgrading Image file to switch
In the privilege mode of switch, use the command COPY to copy the mirror files on TFTP server to the boot directory of switch flash.
Switch# copy mgmt-if tftp://10.10.29.160/SwitchOS-v7.4.4.it.r.bin flash:/boot/SwitchOS-v7.4.4.it.r.bin
When copying, check if the switch has enough space; if the space is not enough, you can delete redundant mirror.
Set the mirror that will be loaded when switch starts next time
After copying the mirror to a relevant directory of switch, you can use the command boot to set the mirror that will be loaded when switch
starts next time;
Switch(config)# boot system flash:/boot/ SwitchOS-v7.4.4.it.r.bin
View the mirror that will be loaded when switch starts next time
After setting the mirror that will be loaded when switch starts next time, you can use the command SHOW to check if the setting is valid;
Switch# show boot images
System image files list:
Current boot image version: 7.4.4
Create Time Version File name
======================================================================
2019-12-01 15:03:30 7.4.4 SwitchOS-7.4.4.it.r.bin
Among them, the files marked with * are image files that will be loaded when switch starts next time.

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7. Maintenance and Troubleshooting
7.1 Loading Failure Processing:
After loading fails, the system will keep running in the original version. At this time, users should re-check if physical port connections are
good firstly. If some ports are not connected, then re-connect them to ensure that physical connections are correct, and begin re-loading. If
physical connections are correct, then check the loading process information displayed on the super terminal to verify if there are input
errors. If there are input errors, correct them and re-load. For example, when using TFTP protocol, we enter incorrect IP addresses of Server
and Switch, name of loading software, do not specify the correct working path of correct TFTP server and so on; if physical connections are
good, and there are no input errors in the loading process but the loading fails finally, please contact agents for help.
7.2 User Password Lost
If system password is lost or forgotten, the following method can be used to reset password:
Enter uBoot operation mode; see Chapter 5 for how to enter;
Input boot_flash_nopass command to start system in uBoot mode;
After using boot_flash_nopass command, system will clear up the startup-config files; before starting this operation, the startup-config files
will be stored in flash:/startup-config.conf.old file.
7.3 Power System Troubleshooting:
Switch can judge if its power system is faulty according to the SYS indicator on the front panel: when power system works normally, the
SYS indicator shall always keep lighting; when the SYS indicator is off, please check if:
The power line of switch is connected correctly.
EPS of switch matches the power required by switch.
7.4 Configuration System Troubleshooting:
After the switch is powered on, if system is normal, the startup information will be displayed on the configuration terminal; If the
configuration system is faulty, the configuration terminal may display no information or hashes.
No information on the terminal
After power-on, if no display information on configuration terminal appears, please check if:
The power is normal.
The cable of configuration port (Console) is properly connected.
If no problems have been found after the above checks, it is possible that configuration cable is faulty or the parameter setting of terminal
(such as super terminal) are incorrect, please check accordingly.
Troubleshooting for the terminal displaying hashes:
If the configuration terminal displays hashes, it is probable that the parameter setting of terminal (such as super terminal) are incorrect
Please confirm the parameter setting of terminal (such as super terminal): baud rate: 115200, data bit: 8, parity: no, stop bit: 1, flow control:
NA, selecting terminal emulation: VT100.

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8.Instructional safeguard
Caution: Shock hazard/Attention: Danger of electric shock
Disconnect all power sources.
The EUT (Equipment Under Test) must be connected to an external fuse or circuit breaker with a rating of 20A.