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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Switch stacking technology is a network solution that enables network switches to be connected together as a single unit with the same IP address. Set up as a single entity, stackable switches have not only optimized scalability and flexibility but also simplified network configuration and administration. FS S3900 series stackable switches, which are designed for the campus network, SMB, and home network, have the ability to stack as well.
Here stacking two S3900-24T4S switches is taken as an example. As shown in the topologic graph below, Switch-A and Switch-B are stacked in one group. Two S3900-24T4S switches are stacked together as one unit, which enables users to expand their network capacity without the hassle of managing multiple devices. What's more, it is feasible to add up to six S3900-24T4S switches as needed without affecting the overall performance of the switch stack.
In this example, S3900-24T4S-A is the stack master and S3900-24T4S-B is the slave. Electing the stack master of S3900 series switches follows the principles:
After successful configuration, the switch to reboot first is elected as the master by default.
In the case of running simultaneously, the switch with the highest stack member priority value will become the master. The highest priority value can be assigned to the switch using command.
If the switches in a stack have the same boot time as well as priority value, the master will be the switch with the lowest MAC address.
S3900 series stackable switches are all embedded with four 10G SFP+ ports, only the two of which in the far right are assigned for stacking. All of the S3900 series switches are able to connect through a combination of 10G SFP+ transceiver and fiber patch cables or via 10G SFP+ DAC or AOC cables. The detailed connections of different stack members from two to six are shown in the figure below.
Notes:
S3900 series switches support switch stacking up to six units of the same model.
The stacking ports are always the two 10G SFP+ ports with the maximum number of S3900 series switches, port 27 & 28 for S3900-24T4S and S3900-24F4S switches stack configuration and port 51 & 52 for S3900-48T4S switches. The ports will no longer be the service port or be configured after being applied for stacking.
If communication between switches is interrupted after a stack is set up, the stack will split into standalone switches, which is called stacking split. In the process of splitting, there will be a failure in data flow, the duration of which is about one second. However, the overall transmission will not be affected.
The following stack configuration will take two S3900-24T4S switches as an example. Stacking 3/4/5/6 S3900 series switches follows the same configuration steps and commands as stacking two switches.
The configuration roadmap is here:
Enable the stacking function of the two S3900 switches.
After the stack is set up, observe indicators and save the configuration, then reboot the two switches.
Check the status of the master switch.
Check the interface information, the master switch will show all the interface and the four ports for stacking will not show in the port list.
S3900-24T4S-A(config)#stacking enable 1
S3900-24T4S-B(config)#stacking enable 1
S3900-24T4S-A#copy running-config startup-config
S3900-24T4S-A#restart
S3900-24T4S-B#copy running-config startup-config
S3900-24T4S-B#restart
Switch#show stacking status
Switch#show interfaces brief
Switch(config)#vlan database
Switch(config-vlan)#vlan 10
Switch(config-vlan)#exit
Switch(config)#int vlan 10
Switch(config-if)#ip add 10.100.10.3/24
Switch(config)#interface ethernet 1/21
Switch(config-if)#switchport mode access
Switch(config-if)#switchport access vlan 10
Switch(config)#interface ethernet 2/21
Switch(config-if)#switchport mode access
Switch(config-if)#switchport access vlan 10
C:Userss>ping 10.100.10.3
Pinging 10.100.10.3 with 32 bytes of data:
Reply from 10.100.10.3: bytes=32 time=4ms TTL=249
Reply from 10.100.10.3: bytes=32 time=56ms TTL=249
Reply from 10.100.10.3: bytes=32 time=6ms TTL=249
Reply from 10.100.10.3: bytes=32 time=14ms TTL=249
Ping statistics for 10.100.10.3:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 4ms, Maximum = 56ms, Average = 20ms
C:Userss>ping 10.100.10.3
Pinging 10.100.10.3 with 32 bytes of data:
Reply from 10.100.10.3: bytes=32 time=13ms TTL=249
Reply from 10.100.10.3: bytes=32 time=3ms TTL=249
Reply from 10.100.10.3: bytes=32 time=4ms TTL=249
Reply from 10.100.10.3: bytes=32 time=10ms TTL=249
Ping statistics for 10.100.10.3:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 3ms, Maximum = 13ms, Average = 7ms
Voice VLAN Configuration on FS S3900 Series Switches
Traffic Segmentation Configuration on FS S3900 Series Switches
Can a port group be a downlink port if the group is a trunk? By Chavers on May 1, 2022
Yes, if the port group is trunk type, it can also be used as a downlink port. By FS on May 2, 2022
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
It is fanless, so it's suitable for deployment in work areas or home scenes. By FS on March 15, 2022
Does this switch requires liscensing like the cisco types? By Aaron Laymon on March 14, 2022
It does not require a license, all the features listed are available directly on the switch. By FS on March 14, 2022
What are the dimensions? By Kilby on March 10, 2022
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
Does this switch come with rack mount ears and screws? By Herbert on March 9, 2022
Mine come with the ears and screws for the ears. By FS on March 11, 2022
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
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
Does the switch support other operating systems besides FSOS? By Keith Carter on December 30, 2021
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
Could you provide inter-VLAN routing and relevant documents? By Bruck on December 25, 2021
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
Can the S3900-24T4S switch connect two routers and then segment the network? By Jacob on December 21, 2021
S3900-24T4S supports VLAN, L3 Static Routing, and QoS, which can meet your requirements for network segmentation. By FS on December 21, 2021
DHCP Server can be configured on S3900-24T4S switches, correct? By Goulet on December 17, 2021
I'm sorry you can't, it doesn't support DHCP Server. By FS on December 17, 2021