FS S3900 SERIES SWITCHES

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FS S3900 SERIES SWITCHES

Overview

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.

S3900-24T4S S3900-24F4S S3900-48T4S

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Product Guideline : Product Guideline

Case Study

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FAQ

 Basic Information: Overview; Test Report; EOM, EOFS and EOS Date; Supported Module & Cable

 Configuration Guide: Switch Stack; Voice VLAN; STP Configuration; Interface-based VLAN; IP Subnet-based VLAN; Protocol-based VLAN; Traffic Segmentation; Log in Guide; Port Mirroring; MAC Address-based VLAN; LACP; SNMP; DHCP Snooping

IP Subnet-based VLAN Configuration on FS S3900 Series Switches

Posted on 2019-09-27 17:14:46 By FS.COM

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A VLAN(virtual LAN) is any broadcast domain that is partitioned and isolated in a computer network at the data link layer which groups devices from different physical LANs into a single logical network, improving simplicity, security, traffic management, or economy.

There are four types of VLAN configuration, which consists of interface-based VLAN, MAC address-based VLAN, IP subnet-based VLAN, protocol-based VLAN, and policy-based VLAN. Among these configurations, assigning VLAN based on IP subnets applies to scenarios where there is a high requirement for mobility and simplified management but a low requirement for security. This article will guide you to learn about the IP subnet-based VLAN feature of FS S3900 series L2+ switches.

IP Subnet-based VLAN Application on FS S3900 Series Switches

A data center has multiple services, which use varying IP subnets. Different services need to be allocated to different VLANs and distributed to different remote networks based on VLAN IDs. For example, the diagram below shows a FS S3900-24T4S switch with three ports configured to handle the traffic for three VLANs. Through IP subnet-based VLAN Configuration, the three different IP addresses are separately assigned to VLAN 10, VLAN 20 and VLAN 30 so that interface ethernet 1/0/5-1/0/7 of the switch can transmit packets with different VLAN IDs to devices which are received from the router.

IP subnet-based VLAN application.png

In this example, IP subnet-based VLAN assignment reduces traffic and thereby speeds up the network. What’s more, generally, each subnet corresponds with a VLAN. The port configured with IP subnet-based VLAN will assign the packet to a VLAN based on its source address of the packet even if the port changes, which shows the flexibility of IP subnet-based VLAN feature.

Hardware Connection Guide for IP Subnet-based VLAN

In the following example, FS S3900-24T4S switch is configured for an IP subnet-based VLAN. PC-1, PC-2, and PC-3 respectively belongs to different IP subnets. The interface ethernet 1/1-3 on the switch are configured as hybrid ports. Untagged packets for VLAN 10, VLAN 20, and VLAN 30 are transmitted and received on these ports.

IP subnet-based VLAN connection.png

Note:

The IP subnet-based VLAN Configurations are only applicable on hybrid ports.
The IP subnet-based VLAN Configurations are only applied to untagged packets.

IP Subnet-based VLAN Configuration Roadmap

To configure IP subnet-based VLAN on FS S3900 series switches, these guidelines should be followed:

Create VLANs on the switch and configure IP address.
Configure hybrid interfaces and assign them to corresponding VLANs in an untagged mode.
Configure pinging gateway test on the three PCs respectively.
Check the VLAN interface on the switch to see if the PC can ping the gateway IP address.

FS S3900 Switch IP Subnet-based VLAN Configuration via CLI

1. Create IP subnet-based VLANs on S3900-24T4S switch.

S3900-24T4S#configure terminal
S3900-24T4S(config)#subnet-vlan subnet 10.1.1.0 255.255.255.0 vlan 10
S3900-24T4S(config)#subnet-vlan subnet 10.1.2.0 255.255.255.0 vlan 20
S3900-24T4S(config)#subnet-vlan subnet 10.1.3.0 255.255.255.0 vlan 30
S3900-24T4S(config)#exit

2. Verify IP subnet-based VLAN configuration.

S3900-24T4S#show subnet-vlan
IP subnet.png

3. Create VLAN 10, VLAN 20 and VLAN 30 on the switch.

S3900-24T4S#configure terminal
S3900-24T4S(config)#vlan database
S3900-24T4S(config-vlan)#vlan 10
S3900-24T4S(config-vlan)#vlan 20
S3900-24T4S(config-vlan)#vlan 30
S3900-24T4S(config-if)#exit

4. Configure IP address on the switch.

S3900-24T4S(config)#interface vlan 10
S3900-24T4S(config-if)#ip add 10.1.1.1/24
S3900-24T4S(config-if)#exit
S3900-24T4S(config)#int vlan 20
S3900-24T4S(config-if)#ip add 10.1.2.1/24
S3900-24T4S(config-if)#exit
S3900-24T4S(config)#interface vlan 30
S3900-24T4S(config-if)#ip add 10.1.3.1/24
S3900-24T4S(config-if)#exit

5. Configure Ethernet 1/1, Ethernet 1/2, and Ethernet 1/3 as hybrid interfaces and permit packets of VLAN 10, 20, and 30 to pass through in an untagged mode.

S3900-48T4S(config)#interface ethernet 1/1
S3900-48T4S(config-if)#switchport mode hybrid
S3900-48T4S(config-if)#switchport hybrid allowed vlan add 10 untagged
S3900-48T4S(config-if)#switchport hybrid allowed vlan add 20 untagged
S3900-48T4S(config-if)#switchport hybrid allowed vlan add 30 untagged
S3900-24T4S(config-if)#exit
S3900-48T4S(config)#int ethernet 1/2
S3900-48T4S(config-if)#switchport mode hybrid
S3900-48T4S(config-if)#switchport hybrid allowed vlan add 30 untagged
S3900-48T4S(config-if)#switchport hybrid allowed vlan add 20 untagged
S3900-48T4S(config-if)#switchport hybrid allowed vlan add 10 untagged
S3900-24T4S(config-if)#exit
S3900-48T4S(config)#int ethernet 1/3
S3900-48T4S(config-if)#switchport mode hybrid
S3900-48T4S(config-if)#switchport hybrid allowed vlan add 10 untagged
S3900-48T4S(config-if)#switchport hybrid allowed vlan add 20 untagged
S3900-48T4S(config-if)#switchport hybrid allowed vlan add 30 untagged
S3900-24T4S(config-if)#exit

6. Configure pinging gateway test on PC-1, PC-2 and PC-3 respectively.

C:UsersDell>ping 10.1.1.1
Pinging 10.1.1.1 with 32 bytes of data:
Reply from 10.1.1.1: bytes=32 timeReply from 10.1.1.1: bytes=32 timeReply from 10.1.1.1: bytes=32 timeReply from 10.1.1.1: bytes=32 timePing statistics for 10.1.1.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms
C:UsersDell>ping 10.1.2.1 Pinging 10.1.2.1 with 32 bytes of data:
Reply from 10.1.2.1: bytes=32 timeReply from 10.1.2.1: bytes=32 timeReply from 10.1.2.1: bytes=32 timeReply from 10.1.2.1: bytes=32 timePing statistics for 10.1.2.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms
C:UsersDell>ping 10.1.3.1
Pinging 10.1.3.1 with 32 bytes of data:
Reply from 10.1.3.1: bytes=32 timeReply from 10.1.3.1: bytes=32 timeReply from 10.1.3.1: bytes=32 timeReply from 10.1.3.1: bytes=32 timePing statistics for 10.1.3.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms

7. Check the VLAN interface on S3900-24T4S switch.

S3900-24T4S#show vlan all
VLAN ID : 1
Name : DefaultVlan
Type : Static
Members : Eth1/ 1(S) Eth1/ 2(S)Eth1/ 3(S) Eth1/ 4(S) Eth1/ 5(S)
Eth1/ 6(S) Eth1/ 7(S) Eth1/ 8(S) Eth1/ 9(S) Eth1/10(S)
Eth1/11(S)Eth1/12(S)Eth1/13(S) Eth1/14(S) Eth1/15(S)
Eth1/16(S) Eth1/17(S) Eth1/18(S) Eth1/19(S) Eth1/20(S)
Eth1/21(S) Eth1/22(S) Eth1/23(S) Eth1/24(S) Eth1/25(S)
Eth1/26(S) Eth1/27(S) Eth1/28(S) Eth1/29(S) Eth1/30(S)
Eth1/31(S) Eth1/32(S) Eth1/33(S) Eth1/34(S) Eth1/35(S)
Eth1/36(S) Eth1/37(S) Eth1/38(S) Eth1/39(S) Eth1/40(S)
Eth1/41(S) Eth1/42(S) Eth1/43(S) Eth1/44(S) Eth1/45(S)
Eth1/46(S) Eth1/47(S) Eth1/48(S) Eth1/49(S) Eth1/50(S)
Eth1/51(S) Eth1/52(S)
VLAN ID : 10
Name :
Type : Static
Members : Eth1/ 1(S) Eth1/ 2(S) Eth1/ 3(S)
VLAN ID : 20
Name :
Type : Static
Members : Eth1/ 1(S) Eth1/ 2(S) Eth1/ 3(S)
VLAN ID : 30
Name :
Type : Static
Members : Eth1/ 1(S) Eth1/ 2(S) Eth1/ 3(S)

Interface-based VLAN Configuration on FS S3900 Series Switches
Voice VLAN Configuration on FS S3900 Series Switches

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Date

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S3900-24T4S S3900-24F4S S3900-48T4S

See Full Details

Q:
Can a port group be a downlink port if the group is a trunk? By Chavers on May 1, 2022

A:
Yes, if the port group is trunk type, it can also be used as a downlink port. By FS on May 2, 2022
Q:
How loud is it? I plan to use it in a homelab office and need to know if I will be able to sit next to it all day. Thanks By Harlan on March 14, 2022

A:
It is fanless, so it's suitable for deployment in work areas or home scenes. By FS on March 15, 2022
Q:
Does this switch requires liscensing like the cisco types? By Aaron Laymon on March 14, 2022

A:
It does not require a license, all the features listed are available directly on the switch. By FS on March 14, 2022
Q:
What are the dimensions? By Kilby on March 10, 2022

A:
Physical dimensions 44 x 440 x 280mm(1.73'' x 17.32'' x 11.02''), this fits a standard19"rack slot with a minimum of 1U height. By FS on March 11, 2022
Q:
Does this switch come with rack mount ears and screws? By Herbert on March 9, 2022

A:
Mine come with the ears and screws for the ears. By FS on March 11, 2022
Q:
Does the 10G Uplink port of this switch support the electrical interface module of FS? What happens to the rate? By Colby on January 1, 2022

A:
The 10G port of S3900-24T4S switch can use FS electrical interface module, which has no impact on the rate. It only says that the electrical interface module is used with network cables, and the optical module is used with fiber optic cables. By FS on January 1, 2022
Q:
Does the switch support other operating systems besides FSOS? By Keith Carter on December 30, 2021

A:
S3900-24T4S is a hardware and software integrated switch. It cannot be installed and adapted to other operating systems. By FS on December 30, 2021
Q:
Could you provide inter-VLAN routing and relevant documents? By Bruck on December 25, 2021

A:
Hello, S3900-24T4S supports inter VLAN routing, You can refer to section 3.1 of this document: S3900 Series Switches Configuration Guide . By FS on December 25, 2021
Q:
Can the S3900-24T4S switch connect two routers and then segment the network? By Jacob on December 21, 2021

A:
S3900-24T4S supports VLAN, L3 Static Routing, and QoS, which can meet your requirements for network segmentation. By FS on December 21, 2021
Q:
DHCP Server can be configured on S3900-24T4S switches, correct? By Goulet on December 17, 2021

A:
I'm sorry you can't, it doesn't support DHCP Server. By FS on December 17, 2021
Q:
How about the noise of this switch? By Irving on December 12, 2021

A:
I bought this switch and used it in my office without noise because it’s fanless. By FS on December 12, 2021
Q:
Does the S3900-24T4S allow loopback testing? By Gainer on December 4, 2021

A:
Yes, my sales told me that this switch supports it. By FS on December 4, 2021
Q:
I have a project that needs 10GbE fanless switch. Do you have any recommendations? Don't need too many ports, 16-24 is enough. By Poulin on December 1, 2021

A:
We recommend S3900-24T4S and S3900-24T4S-R. You can check their datasheets for further information. S3900-24T4S: S3900 Series Switches Datasheet ; S3900-24T4S-R: S3900-R Series Switches Datasheet . By FS on December 1, 2021
Q:
It's a gigabit hub of S3900-24T4S, but convert SPF to rj45. Can I connect to 0Ghub, connect a computer to 1G RJ45, and use it without any special settings? By Miranda on November 20, 2021

A:
S3900-24T4S features 24x 10/100/1000Base-T RJ45, 4x 10G SFP+, which can be directly connected to the computer through the network cable. If the optical port is needed to be connected to the electrical port, it is necessary to insert a fiber optic transceiver on the optical port, such as #11773. And the speed is reduced to 1G, then you can use the network cable to connect the computer. The following describes the command for reducing speed: S3900-24T4S-1#configure terminal S3900-24T4S-1(config)#interface ethernet 1/28 S3900-24T4S-1(config-if)#speed-duplex 1000full By FS on November 20, 2021
Q:
I do not know a lot of CLI when it comes to switches. How is the GUI on this switch? By Smit on November 18, 2021

A:
You can refer to the web configuration manual: S3900 Series Switches Web Management Configuration Guide . If you are confused about the reference manual, or do not feel intuitive, we can provide remote experience for you:Request Demo, operate the Web in the remote environment set up in the laboratory. By FS on November 18, 2021
Q:
Can the S3900-24T4S four SFP+ ports be arbitrarily configured for both uplink and use for connected servers? Or, are ports 27/28 reserved/limited config for stacking and uplink only? By Cyril Opara on November 14, 2021

A:
The four SFP+ ports on this switch can be used for any uplinks or server connection not only for stacking ports. There are no restrictions on port usage. By FS on November 14, 2021
Q:
Can I use any port or only the uplinks for stacking? By Bode on November 8, 2021

A:
S3900-24T4S can be stacked only through the last two 10G optical ports (ports 27&28), and the stack links must be cross-connected. Stack links can be established in module + fiber optical cables or in DAC/AOC. By FS on November 8, 2021
Q:
Does S3900-24T4S LACP work across the stack? So, for example, one port from one switch and one port from another as part of the same port-channel? By Brad Medina on November 7, 2021

A:
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 November 8, 2021
Q:
Hello, I want to know how long it will take to produce this product, I need it urgently By Ekaterine on November 7, 2021

A:
I also asked my account manager, she said it has enough stock. By FS on November 8, 2021
Q:
Can I connect the two switches S3900-24T4S using the 10GBASE-SR and the 30m (98ft) LC UPC to LC UPC Duplex OM3 Multimode Cable? By Timothy on November 7, 2021

A:
I tried it and it works. By FS on November 7, 2021
Q:
Do you have a recommendation on which of the smaller models would be a good unit to test? For requirements I’d say nothing bigger than 24 ports and is managed. Layer3 isn’t a requirement. 1 or 10GB uplink. By Jeffrey Vogt on November 7, 2021

A:
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 November 8, 2021
Q:
LACPインターフェースを作成したいので、設置方法を教えてください。 By on November 6, 2021

A:
LACPの設置方法はhttps://img-en.fs.com/file/user_manual/s3900-series-switches-cli-reference-guide.pdf の197ページからご参照ください。 By FS on November 7, 2021
Q:
The S3900 series switch support stacking, may I know if I can stack them of the same series? such as stack S3900-24T4S with S3900-48T4S By Ashbaugh on November 6, 2021

A:
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 November 8, 2021
Q:
it stated that prot 27 and port 28 are for stacking, if i connect a server or storage on that port 27 and port 28, and i connect a machine on the another port on the same switch, can i ping the machine connected on port 27 and 28? or those two ports are only for stacking By Alec George on November 6, 2021

A:
Yes. Ports 27 and 28 can be used as regular ports. They don't have to be used for stacking. By FS on November 7, 2021
Q:
Are rack mount kits included on the switch #72944? By Guinn on November 6, 2021

A:
I have purchsed this switch, and it includes rack mount kits. By FS on November 8, 2021
Q:
I've had a look through the switches that you offer and the S3900-24T4S appear to be the closest to what I will need. But I wanna know what's the difference between S3900-24T4S and MikroTik's CSS326-24G-2S+RM? By Gudino on November 6, 2021

A:
The CSS326-24G-2S+RM provides two 10G uplink ports and supports web management but not CLI management. It supports only simple layer 2 functions but does not support stacking. The advantage of this switch is that it has high-cost performance in the switch with 10G port, especially for small office networks; S3900-24T4S has four 10G uplink ports, supports web/ CLI management, and completes layer 2 functions, it can stack up to six devices. The advantage of this switch is that it is more convenient to expand port rate, link bandwidth, and adapt to a variety of complex network environments for fast-growing enterprises. By FS on November 6, 2021
Q:
We need to reset the password as we have lost it, or factory reset and reconfigure the switch. I have been looking through the documentation but have been unable to find the relevant commands. Is there a way to recover the switch, please? By Satasiya on November 3, 2021

A:
There are two ways to recover the switch: 1. There is a reset button on the switch, after a long press for 10 seconds, it will factory reset automatically. 2. You can also delete the configuration in the command line, refer to the command: delete file name startup-config. By FS on November 4, 2021
Q:
The S3900-24T4S switch, can I make VLAN? Can I do static routing? By Lennie on November 3, 2021

A:
S3900-24T4S supports creating VLANS and configuring static routes. You can learn more about the software functions of s3900-24T4S through the online products datasheet:S3900 Series Switches Datasheet . By FS on November 3, 2021
Q:
I see the S3900-24T4S comes with a 4-year warranty, does this apply to all parts of the hardware (like power supply)? By Matthew on November 1, 2021

A:
It is excluding power supplies and fans whose warranty is only one year. If the power supplies of the switch fail, you should only return the hot-swappable power supplies rather than the whole switch for repair and vice versa. Notably, it has two built-in power supplies. By FS on November 1, 2021
Q:
What is the difference between #134655(S3900-24T4S) and #72944(s3900-24T4S)? By Lovelace on October 26, 2021

A:
The difference lies in 1. Stack number: 24T4S-R can support 8 stacks while 24T4S only can support 6 stacks of the same model; 2. Hardware: 24T4S-R supports more memory than 24T4S; The former DRAM: 256MB, the latter DRAM: 128MB 3. Functions: 24T4S-R supports layer-3 routing functions such as RIP and OSPF, and supports DHCP Server. 24T4S does not support such layer-3 routing functions. By FS on October 26, 2021
Q:
I currently have a fs S3900-24T4S switch that was given to me by my former employer . He was not able to give me the Mounting brackets (L-shape rack ears) for the switch as they were replaced with other devices. Are you able to get me those or guide me in the right direction so I can purchase them? By Roy Owens on October 1, 2021

A:
Yes, we can provide them by offline. You can consult your account manager. By FS on October 1, 2021
Q:
Hello, Can this switch be directly connected to the cat6 patch cables? By Laverna on September 8, 2021

A:
Sure, they can work well. By FS on September 9, 2021
Q:
How many switch stacks does it support? I will have a Ring link needs to be built By Schauer on August 23, 2021

A:
It supports up to 6 Units (Same Models) stacking, two of my switches stacking are working well. By FS on August 23, 2021
Q:
Does S3900-24T4S support FS.com Extreme optics (10301-compatible)? By AFI.IT Dept on August 1, 2021

A:
Yes, FS S3900-24T4S has a low compatibility restriction and Extreme optics will work on it. By FS on August 2, 2021
Q:
Can you give me a pointer on how to change that to 192.168.1.7 via the webinterface? By Demar on July 12, 2021

A:
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
Q:
We plan to install the switch in an open environment. We don't want to be bothered by the noise of the network switch, so silence is the most important thing. Any suggestions? By Bushnell on July 6, 2021

A:
Recommended use S3900-24T4S, Fanless, suitable for your use. By FS on July 6, 2021
Q:
Can you recommend a substitute for MikroTik CSS610-8G-2S+IN (CSS610-8G-2SPLIN)? By Kujawa on June 23, 2021

A:
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
Q:
Does this switch need a license? By Portugal on June 18, 2021

A:
The functions were all activated When I received the device, I can use it directly without license activation. By FS on June 18, 2021
Q:
How should I configure LACP an this switch? By Rotteck on June 17, 2021

A:
Please note the following configuration instructions, LACP begins on page 6, section 2.5 https://img-en.fs.com/file/user_manual/s3900-series-switches-configuration-guide.pdf By FS on June 17, 2021
Q:
Is it possible to install a different OS? By Capps on June 10, 2021

A:
FS has their own FS OS system, also convenient and reliable. By FS on June 11, 2021
Q:
How do I change the default switch address 192.168.1.1, so it will not interfere with the routers address 192.168.1.1? By Bundy on May 31, 2021

A:
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
Q:
How many switch stacks does it support at most? By Duell on May 31, 2021

A:
It seems 6 is the most... By FS on May 31, 2021
Q:
Does this switch support the DC power supply? By Jan on May 28, 2021

A:
As far as I know, most of the FS switches are AC power supplies. By FS on May 28, 2021
Q:
Which network time protocols does this S3900-24T4S switch support? By Elina on May 22, 2021

A:
I see from their datasheet that this switch supports SNTP/NTP. By FS on May 22, 2021
Q:
I need a switch with 5 10/100 ports and low price, does S3900-24T4S work well? By Coptton on May 18, 2021

A:
I bought some pcs and they are working well. A cost-effective choice. By FS on May 18, 2021
Q:
I purchased 4 pcs S3900-24T4S, why there is one of the switches that only shows two 10G ports, it should be four high-speed 10G ports. By Deanblick on May 14, 2021

A:
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
Q:
Is it possible to use the S3900-24T4S switch to connect 2 routers and have traffic segmentation for those? By Butcher on May 12, 2021

A:
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
Q:
Is this switch also manageable via CLI and not only https / Web-based? By Adam Harper on May 12, 2021

A:
S3900-24T4S supports Web, CLI, Telnet, SSH management. By FS on May 14, 2021
Q:
What's the idle or average watt consumption? By Robert on May 11, 2021

A:
Max Power Consumption is 21W, the idle or average watt consumption is around 60% of maximum power consumption. By FS on May 12, 2021
Q:
I have both S3900 stacked and working properly. When i power off the 1st switch in the stack, it takes about 1.5 minutes for the second switch to resume passing traffic. Why is that? By Nelida on May 10, 2021

A:
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
Q:
What patch cables would you recommend with the S3900-24T4S switch to utilize the 10GB capacity and the shielded Cat 6a I have in the whole house? By Jorge Daniel on May 10, 2021

A:
Both cat6 or cat6a cable will work. By FS on May 10, 2021
Q:
I'm unable to find information if they support 802.1x authentication. Do you have a specification sheet with more details? By Wendell on May 10, 2021

A:
In page 4 of the link of datasheet: S3900 Series Switches Datasheet , you can find 802.1x authentication is supported. By FS on May 10, 2021
Q:
I believe S3900-24T4S supports intervlan routing but i cannot find it in the documentation. please help to confirm By Zee on May 9, 2021

A:
check this one: S3900 Series Switches Configuration Guide . By FS on May 10, 2021
Q:
Can you tell me if the S3900-24T4S supports 4 client systems using its 10Gb SFP+ ports? I see it mentions the two end ports (27 and 28) being used for front plane stacking, but if I wasn't stacking another switch, I was wondering if I could use those two ports for client systems as well. By Chris on May 8, 2021

A:
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
Q:
May I know the MTBF for S3900-24T4S? By Maximo on May 7, 2021

A:
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
Q:
if incoming connection is 1g can 10g transmission take place at the uplink? other side being a 10g fiber NAS By Mojica on May 7, 2021

A:
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
Q:
Where can I find the newest firmware? By Karp on May 6, 2021

A:
The further new firmware will be updated in the "Resources" section of the product page. By FS on May 6, 2021
Q:
Does this particular model support IGMP v3 and flow control? By Guinn on May 5, 2021

A:
It seems that it only supports flow control not IGMP v3, but the working performance is really great~ By FS on May 5, 2021
Q:
I saw it supports a small number of static routes. Is there any way to have also OSPF protocol running on it? By Banjoe on May 5, 2021

A:
It doesn't support OSPF dynamic routing. By FS on May 10, 2021
Q:
Can lacp span over 2 stacked S3900 switches? So for example create a lacp interface containing interface 1/24 and interface 2/24? By Austria on May 4, 2021

A:
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
Q:
Does S3900-24T4S support 1G SFP? I want to use my old SFP. By Curamuels on April 29, 2021

A:
I asked the same question last week, and my account manager told me YES. By FS on April 29, 2021
Q:
Can all 4 of these SFP+ ports be used to connect to clients? (ie. 2 for my nas, 1 for server, 1 for another switch) or can the last 2 only be used for stacking other switches? By Mauro on April 28, 2021

A:
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
Q:
Hi, does this support MPLS VPLS? Which one supports BGP VPLS? That should be for your pro switches right? By Sator.Grand on April 24, 2021

A:
Hi, #72944 doesn't support MPLS and VPLS, S5850 series switches, S5800-48T4S and S5800-48F4SR support the MPLS and BGP-VPLS. By FS on April 26, 2021
Q:
Can I use my copper module on 10G Uplink? By Sitton on April 14, 2021

A:
I think the answer is yes as this is what I do By FS on May 5, 2021
Q:
hi does fs3900 SFP+ port support 2.5G speed. I'd like to connect usb to ethernet port 2.5G device By EOS.Srl on March 18, 2021

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

A:
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
Q:
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

A:
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
Q:
After the S3900 switches are stacked, the device has lost the stacking port. What is the reason? By henson on June 19, 2020

A:
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
Q:
Why is the calendar set time of the switch restored after restarting? By Emoef on June 18, 2020

A:
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
Q:
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

A:
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
Q:
Can the stacking and LACP functions of the S3900 be used together? By Helfer on June 15, 2020

A:
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
Q:
Hello, why do I fail to upload firmware to the S3900 switch when upgrading the switch? By Dennis Haislip on June 12, 2020

A:
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
Q:
When configuring QinQ, how many QinQ can be configured for each port? By Jimmina on June 10, 2020

A:
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
Q:
I'm currently evaluating your products for our own infrastructure. I think that your S3900-24T4S could be a good solution for our needs. I need 8 switch to popolate our racks and providing access connectivity to our servers. The main issue is that I also need 2 core switch for connecting the access layer each other and uplink to the network perimeter. I've not found in your catalog a switch model that couldd be used for this scope.We have in plan to upgrade the network with more advanced features in the next future so, for now, I'm investigating the market for an affordable solution. I'm evaluating ubiquity products becaue this vendor has a 12 SFP+ ports available in its catalogue. By Popovich on June 9, 2020

A:
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
Q:
Does the QinQ function of S3900 series switches support no vlan tags or add double vlan tags? By Jamange on June 9, 2020

A:
The S3900 series switches don't support no vlan tags or add double vlan tags yet, but the #S5810 Series Switches support these. By FS on June 9, 2020
Q:
The S3900 series switch is configured with the sflow function, and then after saving the configuration and restarting, the sflow function disappears. What is the reason? By Aneili on June 8, 2020

A:
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
Q:
How to enable the IGMP Snooping function of S3900 series switches? By Danny on June 6, 2020

A:
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
Q:
Does S3900 series switch support 100M transceiver modules? By Jeffers on June 3, 2020

A:
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
Q:
management IP By J. L. on June 1, 2020

A:
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
Q:
What is the command to enable igmp snooping on S3900 series switches? By Lawrence on May 28, 2020

A:
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
Q:
Does the S3900-24T4S switch have Trunk function? If it supports it, does it support Dot1Q? By Huff on May 22, 2020

A:
Yes, the S3900-24T4S switch supports dot1q encapsulation in trunk and trunk modes. By FS on May 22, 2020
Q:
What is the stacking connection between S3900 switches? By Dougsrose on May 20, 2020

A:
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
Q:
Can different models of S3900 series switches be stacked? By Johgan on May 19, 2020

A:
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
Q:
Can the S3900 series switches modify the IP address of the management port through the web? By Tony Lee on May 14, 2020

A:
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
Q:
Does all ports of S3900 series switches support viewing DDM information? By Alford on May 8, 2020

A:
The S3900 series switches currently support 10G ports to view DDM information. By FS on May 8, 2020
Q:
Which switches in FS support stacking? By Trevor on May 2, 2020

A:
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
Q:
If I configure a stack with two S3900 (S1 + S2), is it possible to use LACP with a client for redundancy purpose (e.g. server connected to S1_Port1 and S2_Port1 - so that one link or switch e.g. S1_Port1 or S1 can fail without connection issues)? By Pascal.Bubeck on April 29, 2020

A:
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 Switches Configuration Guide. By FS on April 30, 2020
Q:
About the #72944, I want to know whether its SFP+ port can be used to connect devices or only for uplink? Can it be connected with single computer with 10G fiber interface? By Curtis Reid on April 23, 2020

A:
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
Q:
What's the LACP limit entries of two 72944 stacks? I need more than 8. By Spigner on April 16, 2020

A:
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
Q:
if I create vlan 2 and vlan 3and create virtual interfaces on each can I route between them？ By Jed on April 13, 2020

A:
Yes, you can. This could work, and you can refer on pages 24 and 25 of the S3900 Series Switches Configuration Guide . By FS on April 13, 2020
Q:
I see the mac-address-table aging time command in our S3900 manual on the website, i want to know whether "0" means to disable aging. By Kirk Handy on April 7, 2020

A:
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
Q:
Can the switch be configured to block DHCP (udp port 67-68) in and out on only 1 port while allowing all other traffic on that port? By Frederick.Buzzell on March 17, 2020

A:
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
Q:
I tried a lot of ways to open the S3900-24T4S Switch Visio Stencils, but I failed. Could you tell me how to open it? By Sager on February 20, 2020

A:
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
Q:
Just wondering if you can confirm that the LACP link aggregation on your switches is fully compatible with HP Procurve switches? I have existing 5412zl and 2510G switches that I'm looking to connect to your S3900-24T4S and possibly S5800 series. Basically looking to add the FS switches to allow 10G fibre connections and aggregate 1G to existing switching. What is the max links that can be aggregated? By Erdman on February 17, 2020

A:
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
Q:
Does this switch support QinQ and vlan translation? By Gepack on February 11, 2020

A:
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
Q:
Can you forward multiple vlans to another device connected to an sfp port? By Gary.Ogden on January 24, 2020

A:
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
Q:
Does the sfp+ port support syncing on 2.5G? By Gary.Ogden on January 24, 2020

A:
S3900-24T4S switch does not support slowing down the 10G SFP+ port to 2.5G. By FS on January 31, 2020
Q:
Can I combine the 4x10G SFP+ to use 2 ports for stacking and 2 port to hookup servers and nas. By Roy on November 27, 2019

A:
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
Q:
set-up a port-mirror on the switch By Ajay.Sharma on November 14, 2019

A:
S3900 series switches support port-based isolation. The detailed configuration guide, please kindly check the page 415 of the S3900 Series Switches CLI Reference Guide By FS on November 16, 2019
Q:
Can the S3400-24T4FP switch be stacked with the S3900 series switches? By Jon Baer on October 20, 2019

A:
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
Q:
Is this switch available with DC power supplies? By Tim.Nowaczyk on October 2, 2019

A:
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
Q:
Hello. Does the equipment have Trunk Capabilities? If so does it support Dot1Q. Thank you and have a great day! By ITETINET.ITETINET on September 20, 2019

A:
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
Q:
I have two computers using a 10Gbe network card (Mellanox) with optics transceiver and of course fiber optic cable. Could I use this switch to connect these computers together to transfer files using SPF+ ports? In other words I’m interested in using this switch as a 4-port 10Gbe switch for the home. Will that work? (I'm confused by the "uplinks" description of it). Thanks By Daren.Jacobs on July 21, 2019

A:
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
Q:
I need to run a standard Linux user-mode application on this switch. Does the switch allow access to the Linux command line, or is the CLI the only thing that is available? There are other switches by FS that run Linux (ONIE), but those switches are too expensive for my particular application. By Just Curious on July 5, 2019

A:
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
Q:
Are the SFP+ ports compatible with 10GBASE-T modules, such as FS P/N: SFP-10G-T? By Zan on May 9, 2019

A:
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
Q:
Does this switch work with a "C60 10G DWDM SFP+ 100GHz 80km Module, Cisco Compatible" transceiver? By Chinmay on April 22, 2019

A:
Hello, the S3900-24T4S switch can work with the Cisco compatible C60 10G DWDM SFP+ transceiver modules. By FS on April 24, 2019
Q:
Hi team, does this switch support port-isolation (layer 2 split-horizon between ports)? By Albert.Safiullin on April 6, 2019

A:
S3900 series switches support port-based isolation. The detailed configuration guide, please kindly check the page 415 of the S3900 Series Switches CLI Reference Guide. By FS on April 8, 2019
Q:
Hi, How can I start the User-web-interface (Ethernet) to make quickly and simply configurations? What is the default IP-Adress and the Login-data? I also like the answers to this question as I am about to buy this switch S3900-24T4S Can the 4 SFP+ be used in a common network together with the 24 RJ-45 ports since I need them for my NAS and 2 servers do not need the Uplinks and only need 1 switch By Volcano on April 4, 2019

A:
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
Q:
Is #72944 compatible with SFP-GE-L? By Eswaran on March 14, 2019

A:
Yes, the #72944 S3900-24T4S can be compatible with SFP-GE-L transceiver modules. By FS on March 14, 2019
Q:
This is the smallest switch you do that has a 10G sfp uplink, yes? I would love to find a cheaper and smaller 8 port 1GbaseT with a 10G uplink. That’d be amazing with a 10G fiber aggregation, at least for what I am looking for By Derek on March 2, 2019

A:
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
Q:
Is there a POE version of the S3900-24T4S Fanless 24-Port By Erick on January 30, 2019

A:
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
Q:
Do you have a PoE switch that is able to stack with this one? By Bruno Silva on January 22, 2019

A:
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
Q:
Can we do most of basic configuration trough Webui ? including bandwidth limiting ? By Mathieu on January 19, 2019

A:
You can do most of basic configuration through Webui including bandwidth limiting, port settings, vlan settings and etc. By FS on January 21, 2019
Q:
Do your switch report PSU status ? are we going to be noticied if a PSU fail ? By mathieu on January 19, 2019

A:
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
Q:
Does this switch support LACP / port-channels, MSTP and/or PVSTP? By Niels.van Adrichem on January 10, 2019

A:
Our S3900-24T4S switch can support LACP and MSTP. By FS on January 11, 2019
Q:
Does this switch have POE? If not do you have a quiet 24port with POE? By Bob on November 28, 2018

A:
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
Q:
Are you able to specify MDI/MDIX on this switch or any FS switch? Specification says Auto MDI/MDI-X but I would like to know if you can specify it per port? By quinniedid on November 27, 2018

A:
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
Q:
Are 10Gb SFP ports available for normal use, or only for stacking ? By crond on November 14, 2018

A:
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
Q:
is it suitable to use with sfp SFP1G-SX-31 transceiver? By IT9-Vincenzo on November 13, 2018

A:
Yes, it is suitable to use with SFP1G-SX-31 transceiver. Pls rest assured. By FS on November 14, 2018
Q:
Is the configuration via SSH or console similar to Cisco? Also, does FS keep the firmware up to date? By dragonforge on October 3, 2018

A:
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
Q:
Hi, How can I start the User-web-interface (Ethernet) to make quickly and simply configurations? What is the default IP-Adress and the Login-data? How can I get the completely User-Manual for this type of switch? With best regards Lorenz By Lorenz on September 24, 2018

A:
Hello, your Account Manager will send the relevant documents to you by email. Thanks By FS on September 25, 2018
Q:
What cable(s) are needed to stack these switches? By tony722 on September 18, 2018

A:
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

Explore

Explore

FS S3900 SERIES SWITCHES

Overview

IP Subnet-based VLAN Configuration on FS S3900 Series Switches

IP Subnet-based VLAN Application on FS S3900 Series Switches

Hardware Connection Guide for IP Subnet-based VLAN

IP Subnet-based VLAN Configuration Roadmap

FS S3900 Switch IP Subnet-based VLAN Configuration via CLI

1. Create IP subnet-based VLANs on S3900-24T4S switch.

2. Verify IP subnet-based VLAN configuration.

3. Create VLAN 10, VLAN 20 and VLAN 30 on the switch.

4. Configure IP address on the switch.

5. Configure Ethernet 1/1, Ethernet 1/2, and Ethernet 1/3 as hybrid interfaces and permit packets of VLAN 10, 20, and 30 to pass through in an untagged mode.

6. Configure pinging gateway test on PC-1, PC-2 and PC-3 respectively.

7. Check the VLAN interface on S3900-24T4S switch.

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