The S3900 series switches consist of three models: S3900-24T4S, S3900-24F4S, S3900-48T4S, which are fully managed stackable Gigabit switches, equipped with Broadcom chips, supporting 10G SFP+ uplinks, designed for SMB, campus and enterprise networks.
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FS S3900 series switches are L2/L2+ managed switches that feature L3 routing, 10G speed, physical stacking, etc., designed to meet the needs of the convergence or access layer. For S3900 series managed switches, there are four login methods: console port, Telnet, SSH and Web browser. This article will give a detailed configuration guide of them.
Basically, you can manage the S3900 series switches through CLI (command line interface) and web GUI (Graphical User Interface) system. Console port login, Telnet and SSH configuration are run commands in CLI interface, and web system provides users an easy way to manage and maintain the switch on a GUI. However, console port login is the basis of the other three login modes. Telnet, SSH and web services must be enabled first before you use them.
Different methods have their own applied conditions. Here are the advantages and disadvantages of them.
Login Method | Advantages | Disadvantages | Applications |
---|---|---|---|
Console Port | Simple and easy to log in with a console cable. | Users cannot manage devices remotely. | Log in to a switch for the first time; no network is available; remote switch login fails. |
Web System | Provide users an easy way to manage and maintain the switch on a GUI, which is user-friendly. | It only provides basic management functions. | When a device functions as a server, or users do not familiar with CLI commands. |
Telnet | Offer a way to manage switches remotely without connecting a terminal to each switch. | Data is transmitted using TCP in plain text, which may cause security problems. | Users need to manage devices remotely, and do not require high-level security. |
SSH (Secure Shell) | Provide a more secure remote login way to manage devices effectively. | SSH configuration is complex. | Users need to manage devices remotely with high requirements of security. |
Some users may get confused about the Telnet and SSH because both of them can be used to login remotely.
More details about Telnet and SSH can be found here: Which Client Software Is Better for Telnet and SSH? And in the following part, the four login configuration will be explained. All the configurations can apply to the three modes of S3900 series switches. Here take S3900-48T4S switch as an example.
FS provides the RS232 to RJ45 console cable, if you use a laptop or PC, you should prepare one RS232 to USB converter cable for your laptop or PC.
Prepare the terminal emulation software on your computer. The commonly used emulation software are SecureCRT and Putty. Here take SecureCRT for example.
FS S3900 series switches provide EIA/TIA-232 asynchronous serial console port.
Connect the computer and S3900-48T4S via the RS232 to RJ45 console cable as shown in the following figure.
Tips for finding the corresponding COM port on the computer:
Pressing the Windows Key + R to open the Device Manager, then type “devmgmt.msc” and press "Enter".
Expand the Ports (COM & LPT) section to view which COM port you have used.
2. Start the terminal emulation software SecureCRT, select the serial login mode and set the terminal communication parameters as follows:
3. Click “Connect” and the following interface will be displayed. Enter the default username (admin) and password (admin), then you can run commands to configure the switch.
Username: admin
password:
CLI session with the S3900-48T4S is opened.
To end the CLI session, enter [Exit]
S3900-48T4S#
HTTP service must be enabled in CLI environment.
To use the web management function, users need to open a browser and enter the IP address that set in the CLI interface.
S3900-48T4S #configure terminal
S3900-48T4S(config)#interface Craft
S3900-48T4S(config-if)#ip address 192.168.1.1/24
S3900-48T4S(config-if)#exit
S3900-48T4S(config)#server http enable
S3900-48T4S (config)#end
S3900-48T4S#show ip interface vlan 1
VLAN 1 is Administrative Up - Link Down
Address is 00-00-00-00-02-02
Index: 1001, MTU: 1500
Address Mode is User specified
Proxy ARP is disabled
DHCP Client Vendor Class ID (text): S3900-48T4S
DHCP Relay Server:
Craft interface is Administrative Up
IP Address: 192.168.1.1 Mask: 255.255.255.0
Telnet service must be enabled in the console port login before you use it.
S3900-48T4S #configure
S3900-48T4S (config)#interface Craft
S3900-48T4S(config-if)#ip address 192.168.1.1/24
S3900-48T4Sconfig-if)#exit
S3900-48T4S(config)#server telnet enable
S3900-48T4S (config)#end
SSH function must be enabled via console port or Telnet before you use it.
S3900-48T4S #configure
S3900-48T4S (config)#interface Craft
S3900-48T4S(config-if)#ip address 192.168.1.1/24
S3900-48T4Sconfig-if)#exit
SW#ip ssh crypto host-key generate (Earlier than 1.6.9, you need to create a key first to start ssh.)
SW(config)#ip ssh server enable
Hi, is there a way to set a default gateway for the Management Interface - or is the accesss only possible from the same network Segment? By Sebastian.Schubert on October 19, 2020
Hello, the s3900 management port is not isolated from the service interface, so you only need to write a default route. For example: IP route 0.0.0.0 0.0.0.0 10.32.133.254 By FS on October 20, 2020
My switches are running the most recent release of the software available, but the ssh server implementation is so ancient that it cannot interoperate with even a four-year-old Ubuntu 16.04 client. When can this be fixed? By Garrett.Wollman on August 26, 2020
Hello, our switch supports ssh2.0, please describe in detail "the implementation of sh server is so old". Asymmetric encryption support: RSA1, DSA2 Symmetric encryption support: AES-128, AES-192, AES-256, 3DES, des_cbc, Blowfish HASH support: MD5, SHA1 By FS on August 27, 2020
After the S3900 switches are stacked, the device has lost the stacking port. What is the reason? By henson on June 19, 2020
After the S3900 switch is successfully stacked and you check the port status through the commands, the two stacking ports of the device will disappear which is a normal situation. It is mainly to prevent misoperation. Please don't worry. By FS on June 19, 2020
Why is the calendar set time of the switch restored after restarting? By Emoef on June 18, 2020
The time of calendar set is not saved in the configuration file so it will not continue counting after the device is turned off. It is recommended to use the ntp service to synchronize the system time, so that after the switch restarts, you only need to set the next restart time, and don‘t need to set the system time again. By FS on June 18, 2020
When multiple S3900 switches are stacked, one of them will go down. Will it affect the normal operation of other switches? By Soucie on June 16, 2020
If the master is down, it will re-elect, the election process is the same as the first stack. If it is a slave downtime, there will be no impact. By FS on June 16, 2020
Can the stacking and LACP functions of the S3900 be used together? By Helfer on June 15, 2020
Yes, after the S3900 switches are stacked, they are logically one device and can implement LACP with other devices. By FS on June 15, 2020
Hello, why do I fail to upload firmware to the S3900 switch when upgrading the switch? By Dennis Haislip on June 12, 2020
The S3900 series switches only support a maximum of 2 firmwares. Please use the command dir to check whether there are currently two firmwares. If so, you need to delete one and add the new one. If there is only one, please check whether the firmware is damaged. It is recommended to download and install again. By FS on June 12, 2020
Does the S3900 switch support https import certificates? By Shuford on June 11, 2020
Yes, but there are some requirements for the size of the certificate, the maximum is 5KB and the key is 2KB. By FS on June 11, 2020
When configuring QinQ, how many QinQ can be configured for each port? By Jimmina on June 10, 2020
The S3900 series are the access layer switches, which have certain restrictions on the hardware, so the maximum entry for QinQ is 24 per port. By FS on June 10, 2020
Hello, i see you need a solution for your network; our tech and salers can help you design your whole network solution with best quality and price. And we recommend the S3900-24T4S for you to connect to the server. The function of the core switch is more abundant than that of the access layer switch. So as for the core switch, we recommend S5800-8TF12S for the core switch. By FS on June 9, 2020