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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VLAN (Virtual Local Area Network) is a technology that divides a physical LAN into multiple broadcast domains to control the broadcast storm, enhance LAN security and simplify network management. The hosts in the VLAN can communicate with each other, but different VLANs cannot communicate with each other. Consequently, broadcast packets are confined to within a single VLAN.
VLAN can be divided into interface-based VLAN, MAC address-based VLAN, IP subnet-based VLAN, protocol-based VLAN, and policy-based VLAN. This article will focus on the interface-based VLAN configuration on FS S3900 series switches which are designed for the campus network, SMB, and home network.
The following figure shows a typical VLAN networking application of S3900-24F4S managed switch. At the first floor, there are two departments—IT and sales department. The company needs that different departments cannot communicate with each other, only the hosts in the same department can access each other. Therefore, different VLANs are configured on the S3900-24F4S switch to isolate the two departments.
Based on the connected object type and the way the interface process frames, the switch ports in the interface-based VLAN can be divided into the following types:
The access port can only receive and send untagged frames because it cannot identify VLAN tags. But it can add only a unique VLAN tag to untagged frames. Usually, the access interface connects to a user terminal like user host or server.
A trunk port can allow multiple VLANs frames to get through with tags, but it can only allow frames of one VLAN to be sent out of the trunk interface without tags (that is to say: removing the tags). Therefore, the trunk interface often connects a switch, router, AP, or voice terminal that allows tagged and untagged frames to pass at the same time.
Hybrid port allows tagged frames from multiple VLANs to pass. Frames sent out from a hybrid interface are tagged or untagged according to the VLAN configuration. And hybrid port can connect with terminal devices that can receive and send tagged and untagged frames.
Notes:
Hosts in the same VLAN can communicate with each other while different VLANs can not (you must configure the trunk or hybrid port for the switch or router).
There is a default VLAN in every port. Generally, the default VLAN of all ports is VLAN 1, but users can configure it according to their requirements.
The trunk and hybrid port can be used universally in many application scenarios, but in some scenes, you must use the hybrid ports. For example, if you want to use a port to connect a network segment of different VLAN, you have to apply the hybrid interface due to that an interface needs to add tags to multiple untagged packets.
Because an access port can join only one VLAN, its default VLAN is the VLAN to which it belongs and cannot be configured. On the contrary, you can configure a default VLAN for the trunk and hybrid port due to that they can join multiple VLANs.
The following configuration is done based on the three pictures mentioned above.
The interface-based VLAN configuration of S3900 series switches can be realized via CLI and web GUI interface. And the configuration process is suitable for all modes of S3900 series switches. Here take S3900-24F4S as an example.
The configuration roadmaps are here:
Connect the PC to the switch and login to the CLI interface through the console port, Telnet or SSH.
Create the VLAN and name the ID for it.
Configure the switch port mode and add it to the corresponding VLAN.
1. Login to the S3900-24F4S switch and enter into the CLI interface.
2. Create VLAN 10 and VLAN 20 in the S3900-24F4S switch 1.
S3900-24F4S-1#configure terminal
S3900-24F4S-1(config)#vlan database
S3900-24F4S-1(config-vlan)#vlan 10,20
3. Configure the 1/1 port as the access interface and add it into VLAN 10
S3900-24F4S-1(config)#interface ethernet 1/1
S3900-24F4S-1(config-if)#switchport mode access
S3900-24F4S-1(config-if)#switchport access vlan 10
4. Configure the 1/2 port as the access interface and add it into VLAN 20
S3900-24F4S-1(config)#interface ethernet 1/2
S3900-24F4S-1(config-if)#switchport mode access
S3900-24F4S-1(config-if)#switchport access vlan 20
5. Configure the 1/3 port as the access interface and add it into VLAN 10
S3900-24F4S-1(config)#interface ethernet 1/3
S3900-24F4S-1(config-if)#switchport mode access
S3900-24F4S-1(config-if)#switchport access vlan 10
6. Configure the 1/4 port as the access interface and add it into VLAN 20
S3900-24F4S-1(config)#interface ethernet 1/4
S3900-24F4S-1(config-if)#switchport mode access
S3900-24F4S-1(config-if)#switchport access vlan 20
7. After the configuration is successful, PC1 and PC3 are in the same VLAN 10 and can communicate with each other. PC2 and PC4 can communicate with each other and cannot communicate with PC1 and PC3.
1. Login to the S3900-24F4S switch and enter into the CLI interface.
2. Create VLAN 10 and VLAN 20 in the S3900-24F4S switch 1.
S3900-24F4S-1#configure terminal
S3900-24F4S-1(config)#vlan database
S3900-24F4S-1(config-vlan)#vlan 10,20
3. Configure the 1/1 port as the access interface and add it into VLAN 10.
S3900-24F4S-1(config)#interface ethernet 1/1
S3900-24F4S-1(config-if)#switchport mode access
S3900-24F4S-1(config-if)#switchport access vlan 10
4. Configure the 1/2 port as the access interface and add it into VLAN 20.
S3900-24F4S-1(config)#interface ethernet 1/2
S3900-24F4S-1(config-if)#switchport mode access
S3900-24F4S-1(config-if)#switchport access vlan 20
5. Configure the 1/3 port as the trunk interface and allow all VLANs to get through.
S3900-24F4S-1(config)#interface ethernet 1/3
S3900-24F4S-1(config-if)#switchport mode trunk
S3900-24F4S-1(config-if)#switchport trunk allowed vlan all
6. Do the same configuration on S3900-24F4S switch 2 like the switch 1 above, and then connect the two trunk ports together.
7. After the configuration is successful, PC1 and PC3 can communicate with each other and PC2 and PC4 can also communicate with each other.
1. Login to the S3900-24F4S switch and enter into the CLI interface.
2. Configure VLAN 10, VLAN 20, and VLAN 30 on the S3900-24F4S switch 1.
S3900-24F4S-1#configure terminal
S3900-24F4S-1(config)#vlan database
S3900-24F4S-1(config-vlan)#vlan 10,20,30
3. Configure the 1/1 port as the hybrid interface, default VLAN as 10 and allow untagged VLAN 10, 30 to get through.
S3900-24F4S-1(config)#interface ethernet 1/1
S3900-24F4S-1(config-if)#switchport mode hybrid
S3900-24F4S-1(config-if)#switchport hybrid pvid 10
S3900-24F4S-1(config-if)#switchport hybrid allowed vlan add 10,30 untagged
4. Configure the 1/2 port as the hybrid interface, default VLAN as 20 and allow untagged VLAN 20, 30 to get through.
S3900-24F4S-1(config)#interface ethernet 1/2
S3900-24F4S-1(config-if)#switchport mode hybrid
S3900-24F4S-1(config-if)#switchport hybrid pvid 20
S3900-24F4S-1(config-if)#switchport hybrid allowed vlan add 20,30 untagged
5. Configure the 1/3 port as the hybrid interface and allow tagged VLAN 10, 20, 30 to get through.
S3900-24F4S-1(config)#interface ethernet 1/3
S3900-24F4S-1(config-if)#switchport mode hybrid
S3900-24F4S-1(config-if)#switchport hybrid allowed vlan add 10,20,30 tagged
6. Create VLAN 10, 20, 30 in the S3900-24F4S switch 2.
S3900-24F4S-2#configure terminal
S3900-24F4S-2(config)#vlan database
S3900-24F4S-2(config-vlan)#vlan 10,20,30
7. Configure the 1/1 port as the hybrid interface, default VLAN as 30 and allow untagged VLAN 10, 20, 30 to get through.
S3900-24F4S-2(config)#interface ethernet 1/1
S3900-24F4S-2(config-if)#switchport mode hybrid
S3900-24F4S-2(config-if)#switchport hybrid pvid 30
S3900-24F4S-2(config-if)#switchport hybrid allowed vlan add 10,20,30 untagged
8. Configure the 1/3 port as the hybrid interface and allow tagged VLAN 10, 20, 30 to get through.
S3900-24F4S-2(config)#interface ethernet 1/3
S3900-24F4S-2(config-if)#switchport mode hybrid
S3900-24F4S-2(config-if)#switchport hybrid allowed vlan add 10,20,30 tagged
9. After the configuration is successful, PC1 and PC2 can communicate with PC3 and PC1 cannot communicate with PC2.
1. Open the browser and enter the Web GUI through IP address 10.32.96.153 (the IP address is set when you enable the web service in CLI interface).
2. Login the Web GUI using the default account and password (admin/admin).
3. Switch Management > VLAN > Static VLAN >VLAN Management > New, create new VLAN on the switch.
4. Enter 10, 20, 30 in the "VLAN ID" and click "Apply" in sequence, then close the page.
5. Configure the port 1 as the access interface in the "Member Setting" and add it to the VLAN 10.
Enter 1 in "Port Range", choose "Access" port mode and input 10 on the "VLAN ID", then click "Apply".
6. Configure the port 2 as the trunk interface and allow VLAN 10, 20, 30 to get through.
Enter 2 in "Port Range", choose 1Q "Trunk" port mode, input 10, 20, 30 on "VLAN ID" and click "Apply" separately.
7. Configure the port 3 as the hybrid interface and allow tagged VLAN 10, 20, 30 to get through.
Enter 3 in "Port Range", choose "Hybrid" mode, input 10, 20, 30 on "VLAN ID" and click "Apply" separately.
8. After the configuration is finished, you can view the port details in corresponding VLANs in the "Member List" above.
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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