My account manager told me S3900 series switch only support stacking in the same model, and S3910 series switch support stacking in the same series By FS on September 9, 2021

It supports up to 6 Units (Same Models) stacking, two of my switches stacking are working well. By FS on August 23, 2021

I think the S3900-24T4S can fully meet your 24 port requirements, and the 24 ports of this switch are all 10/100/1000M speed ports, which can be well connected to various wired terminals in your network. It also has 4*10Gb uplinks. By FS on August 4, 2021

Yes, FS S3900-24T4S has a low compatibility restriction and Extreme optics will work on it. By FS on August 2, 2021

I tried it and it works. By FS on August 2, 2021

FS S39 series could support LACP and work across the stack. For example, the 2nd port of device 1 and 2nd port of device 2 could achieve LACP with the 3rd ports of device 3 & device 4, The prerequisite is that the stack of device 1 & 2 have been done. By FS on July 25, 2021

One advantage I am aware of is that fully managed switches support Stacking or MLAG, but the smart managed pro switches do not. By FS on July 19, 2021

I have purchsed this switch, and it includes rack mount kits. By FS on July 20, 2021

You can do it through CLI but not web, the command will be S3900-24T4S(config)#management ip address 192.168.1.7/24 By FS on July 12, 2021

Recommended use #S3900-24T4S, Fanless, suitable for your use. By FS on July 6, 2021

I am using S3900-24T4S, it has got 24 x Gigabit RJ45, with 4 x 10Gb SFP+. I guess it could be good as a replacement. By FS on June 25, 2021

The functions were all activated When I received the device, I can use it directly without license activation. By FS on June 18, 2021

FS has their own FS OS system, also convenient and reliable. By FS on June 11, 2021

Please use the command: Switch-1#configure terminal , Switch-1(config)#management ip address 192.168.1.1/24 , Switch-1(config)#ip route 0.0.0.0 0.0.0.0 192.168.254. By FS on May 31, 2021

It seems 6 is the most... By FS on May 31, 2021

As far as I know, most of the FS switches are AC power supplies. By FS on May 28, 2021

I see from their datasheet that this switch supports SNTP/NTP. By FS on May 22, 2021

I bought some pcs and they are working well. A cost-effective choice. By FS on May 18, 2021

Hi Bro, I met the same issue with you. Maybe you can check if this one switch is doing stacking. The FS tech guys provide the following commands to fix it: S3900-24T4S-1(config)#no stacking enable 1 S3900-24T4S-1#reboot By FS on May 14, 2021

I have tried before, S3900-24T4S supports VLAN, L3 Static Routing，QOS functions, and can have traffic segmentation according to your requirements. By FS on May 13, 2021

S3900-24T4S supports Web, CLI, Telnet, SSH management. By FS on May 14, 2021

Max Power Consumption is 21W, the idle or average watt consumption is around 60% of maximum power consumption. By FS on May 12, 2021

I have also encountered this situation. After testing the S3900 stack, the stack will renegotiate after the standby device is powered off and restarted. During the negotiation process, services will be temporarily interrupted.This is caused by the stack negotiation mechanism and is a normal phenomenon. Hope this helps. By FS on May 10, 2021

Both cat6 or cat6a cable will work. By FS on May 10, 2021

In page 4 of the link of datasheet: https://img-en.fs.com/file/datasheet/s3900-series-switches-datasheet.pdf, you can find 802.1x authentication is supported. By FS on May 10, 2021

check this one: https://img-en.fs.com/file/user_manual/s3900-series-switches-configuration-guide.pdf By FS on May 10, 2021

Yes, the two end ports (27 and 28) can be used for 10G connection. I used these two ports to link with our servers. By FS on May 8, 2021

You may download their datasheet and have a look. Most of important parameters are listed, and it shows MTBF (Hours) is more than 100,000. Isn't it vey convenient? By FS on May 7, 2021

I'd suggest keeping both sides with the same speed. That is, if the one end switch for 10G rate, the othe end device should for 10G as well. By FS on May 8, 2021

Here you go! You can find all the related documents here. https://www.fs.com/products_support/c/1g-10g-switches-3256?model=S3900-24T4S By FS on May 6, 2021

It seems that it only supports flow control not IGMP v3, but the working performance is really great~ By FS on May 5, 2021

It doesn't support OSPF dynamic routing. By FS on May 10, 2021

You can normally stack two switches A and B, and you can select the 24-port of A and the 24-port of B to form an LACP port By FS on February 8, 2021

I asked the same question last week, and my account manager told me YES. By FS on April 29, 2021

Of course! I use all the SFP+ ports to connect other switches in our lab. No only for stacking. By FS on April 28, 2021

By FS on

I think the answer is yes as this is what I do By FS on May 5, 2021

Yes. Ports 27 and 28 can be used as regular ports. They don't have to be used for stacking. By FS on April 7, 2021

Hello, 2.5G is not supported. By FS on March 18, 2021

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

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 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

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

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

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

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

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

The S3900 series switches don't support no vlan tags or add double vlan tags yet, but the S58 series switches support these. By FS on June 9, 2020

After the switch is configured with sflow function, the configuration file will not display the sflow configuration. When you check the Sflow configuration command, it will show sFlow. By FS on June 8, 2020

In order to make IGMP snooping effective on the S3900 series switches, you need to use the command: ip igmp snooping querier to make the switch actively send down Query. By FS on June 6, 2020

Yes, the 100M transceiver modules are supported on the Gigabit ports of S3900 series switches, but the version needs to be upgraded to V1.6.9 or higher (including V1.6.9). By FS on June 3, 2020

S3900 series switches don‘t support web interface to change the management port IP. We would recommend the S58 series switches, which could support this function. By FS on June 1, 2020

The command example is as follows: Run the following commands in sequence: Switch(config)#ip igmp snooping Switch(config)#ip igmp snooping vlan 1 Switch(config)#ip igmp snooping querier By FS on May 28, 2020

Yes, the S3900-24T4S switch supports dot1q encapsulation in trunk and trunk modes. By FS on May 22, 2020

The S3900 switch uses the last two 10G ports as stack ports, and the connection method is cross-connect (daisy chain). By FS on May 20, 2020

It is not recommended to use different models of S3900 series for stacking because there is a problem with data forwarding. The model and software version of the two switches to be stacked must be consistent. By FS on May 19, 2020

The IP address of the management port cannot be modified through the web currently, but can be modified through CLI commands. By FS on May 14, 2020

The S3900 series switches currently support 10G ports to view DDM information. By FS on May 8, 2020

S3900 series switches, S5900-24S4T2Q switch, S5500-48T8SP switch support stacking. But FS equipment can be stacked only in the same model and version. By FS on May 2, 2020

Yes, the LACP can be achieved with a client for redundancy purpose after two S3900-24T4S switches are stacked. The specific operations of LACP can be referred on page 6 of the S3900 Series Configuration Guide and the stacking can be referred on page 134. By FS on April 30, 2020

Hello, the SFP+ interface of the S3900 can not only be connected to upstream devices, but also be connected to computers and other devices. By FS on April 23, 2020

Hello, S3900-24T4S can create up to 26 groups of LACP, and the maximum number of ports in each group is 8. By FS on April 16, 2020

Yes, you can. This could work, and you can refer on page 24 and 25 of the S3900 Series Switches Configuration Guide . By FS on April 13, 2020

Yes, the normal aging time of mac-address-table is 300s. But if you set static device to "0", the mac-address-table won't get aged. By FS on April 7, 2020

Yes, the S3900-24T4S switch can meet your need well. When the switch implements the above configuration, DHCP information can be filtered out. At this point, no matter what IP address DHCP obtains, as long as the traffics are obtained through DHCP, they will be completely filtered out. The specific configuration guide can be referred on page 137 of the S3900 Series Switches CLI Reference Guide . By FS on March 18, 2020

Hello, you could download the Microsoft Office and choose the VisioPro on the “Main Window” of the Office, then you could open this visio stencils. By FS on February 20, 2020

Yes, S3900 series and S5800 series switches are compatible with your HP Procurve switches because LACP is a public standard protocal and our devices support it. The max aggregated links of S3900 series is 8 and S5800 series is 16. By FS on February 18, 2020

Yes, S3900-24T4S supports QinQ and vlan translation. And all #S39 and S58 series switches support both QinQ and vlan translation. By FS on February 12, 2020

S3900-24T4S switch could support the creation of up to 4096 vlans, which could meet your need for forwarding multiple vlans to another device connected to an SFP port. By FS on January 31, 2020

S3900-24T4S switch does not support slowing down the 10G SFP+ port to 2.5G. By FS on January 31, 2020

Yes, you can. But it should be noted that only the last two 10G ports of the S3900-24T4S switch can be used for stacking. And you can use the other two 10G ports to connect the server and nas. By FS on November 27, 2019

S3900 series switches support port-based isolation. The detailed configuration guide, please kindly check the page 415 of the S3900 Series CLI Reference Guide. By FS on November 16, 2019

Hello, the S3400-24T4FP switch can not be stacked with the S3900 series switches. First, the S3400-24T4FP doesn't support stacking. Second, it should be noted that the model and software version of the two switches to be stacked must be same. By FS on October 20, 2019

The S3900-24T4S switch is not available with DC power supplies. It is equipped with 2 built-in AC power supplies by default. If you need the switches with DC power, FS S58 series switches (except the S5850-48T4Q) can provide the DC power modules. By FS on October 3, 2019

The S3900-24T4S switch supports Trunk and Dot1Q. You can get the detailed configuration guide in the Web Management Manual and CLI Reference Guide. By FS on September 23, 2019

The S3900-24T4S switch can be used to connect computers and 10G network card (Mellanox) together by using SFP+ ports to transfer files. It can be used as a 4-port 10G switch for your home. We recommend the module #11552 to connect the terminal or connect the switch. By FS on July 22, 2019

The S3900-24T4S switch can support CLI and web management, but it doesn't allow access to the Linux command line. By FS on July 9, 2019

The S3900-24T4S switch's SFP+ ports can be compatible with 10GBASE-T modules, such as FS P/N: SFP-10G-T. #66613 recommended. By FS on May 10, 2019

Hello, the S3900-24T4S switch can work with the Cisco compatible C60 10G DWDM SFP+ transceiver modules. By FS on April 24, 2019

S3900 series switches support port-based isolation. The detailed configuration guide, please kindly check the page 415 of the S3900 Series CLI Reference Guide. By FS on April 8, 2019

The default IP adderess is 192.168.1.1. The login information is--username: admin, password: admin. More detailed configuration guide, please check the web and CLI manual in the “Download” section of the product page. By FS on April 5, 2019

Yes, the #72944 S3900-24T4S can be compatible with SFP-GE-L transceiver modules. By FS on March 14, 2019

Yes, S3900-24T4S is the smallest switch with 10G SFP uplink, and 24 10/100/1000BASE-T ports which can meet the demand as you required. So we recommend the S3900-24T4S for you. Thanks! By FS on March 4, 2019

The S3900-24T4S does not have a POE version. POE requires hardware support. You can try POE switch#73459, the four optical ports of it is 1G SFP. By FS on January 31, 2019

A S3900-24T4S switch can only be stacked with other S3900-24T4S switches. It can not be stacked with other brands or other models. By FS on January 23, 2019

You can do most of basic configuration through Webui including bandwidth limiting, port settings, vlan settings and etc. By FS on January 21, 2019

When this switch running SNMP, if the PSU fail, you will receive the Alarm information to be noticed for it. By FS on January 21, 2019

Our S3900-24T4S switch can support LACP and MSTP. By FS on January 11, 2019

Kindly noted that this switch does not support the POE, you can look through the 24 port POE switch from this item #73459. By FS on December 4, 2018

For the MDI/MDIX function, it is auto negotiating the RJ45 network cables. No matter crossover or straight through network cables you use, they all can be recognized. It is a basic function of switch. Our every port can support MDI/MDI-X, and the rate is 1000Mbps. You just need to use the normal network cables, then the port can work well. By FS on November 28, 2018

Yes, 10G SFP Ports are not only available for normal use, but also can support 6pcs switches in stacking mode at the same time. By FS on November 15, 2018

Yes, it is suitable to use with SFP1G-SX-31 transceiver. Pls rest assured. By FS on November 14, 2018

This switch can configure via console and the operation procedure is similar to Cisco, and the firmware update will informed through on FS website. By FS on October 4, 2018

Hello, your Account Manager will send the relevant documents to you by email. Thanks By FS on September 25, 2018

The S3900-24T4S can support stacking. There are 10G fiber port on switch, the stacking cables are 10G DAC. By FS on September 21, 2018