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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Port mirroring is used on a network switch or router to send copies of packets on the specified ports (source ports) to other specified ports (destination ports). FS S3900 series switches are the ideal Gigabit access and aggregation switches for SMB, enterprise and campus networks. They support port mirroring to help users monitor and analyze network traffic, and debug data or diagnose errors on a network.
Port mirroring includes local port mirroring and remote port mirroring based on the working range of mirroring.
Choose local mirroring mode when source ports and destination ports are on one S3900 switch. Take S3900-48T4S port mirroring application as an example. Once port mirroring is set, the source port (11) will copy the packet to the destination port (10), then users can use the monitoring device to monitor and analyze data from the client device.
In remote mirroring, source ports and destination ports do not belong to one S3900 switch. Destination port on one switch can monitor the source port on another switch via the connection between the two different switches. Take remote port mirroring application of S3900-48T4S and S3900-24T4S as an example. Set S3900-48T4S port (5) as the source port, and set S3900-24T4S port (5) as the destination port. And make an uplink connection between the two switches via the ports (10) on two sides. Thus, users can use the monitoring device connected to S3900-24T4S to monitor and analyze the data from the client device connected to S3900-48T4S switch.
SS3900 series switches consist of S3900-24F4S, S3900-24T4S and S3900-48-T4S. All support port mirroring. Rates of source port and destination port should be matched when applying local and remote port mirroring. Sometimes, the destination port rate can be higher than that of the source port, but never less than that of the source port.
Note that:
Configuration takes effect after setting one port as the source port and setting another port as the destination port in local port mirroring.
When creating a mirroring group, only one destination port can be set, but there could be one or more source ports in the group.
If one port has been specified as the source port in one mirroring group, it can’t be a member of another mirroring group.
If one port has been specified as the destination port in one mirroring group, it can’t be a member of another mirroring group.
It’s recommended that do not apply STP, RSTP or MSTP on the destination port, otherwise, the device may malfunction.
Running local and remote port mirroring on S3900 series switches can be achieved by CLI and web interface. Here uses CLI configuration as an example.
Create a VLAN.
Add the source port and destination port to VLAN.
Configure IP address.
Configure port mirroring on the destination port, and copy the packet from the source port to the destination port.
Verify the results.
Specify the source port in a global schema.
Configure the uplink port on one switch.
Specify the destination port in a global schema.
Verify the results.
S3900-48T4S#configure terminal
S3900-48T4S(config)#vlan database
S3900-48T4S(config-vlan)#vlan 10
S3900-48T4S(config)#interface ethernet 1/10
S3900-48T4S(config-if)#switchport mode access
S3900-48T4S(config-if)#switchport access vlan 10
S3900-48T4S(config)#vlan database
S3900-48T4S(config-vlan)#vlan 11
S3900-48T4S(config)#interface ethernet 1/11
S3900-48T4S(config-if)#switchport mode access
S3900-48T4S(config-if)#switchport access vlan 11
S3900-48T4S(config)#interface vlan 10
S3900-48T4S(config-if)#ip add 192.168.3.11 255.255.255.0
S3900-48T4S(config)#interface vlan 11
S3900-48T4S(config-if)#ip add 192.168.2.11 255.255.255.0
S3900-48T4S(config)#interface ethernet 1/10
S3900-48T4S(config-if)#port monitor ethernet 1/11 both
S3900-48T4S#configure terminal
S3900-48T4S(config)#vlan database
S3900-48T4S(config-vlan)#vlan 200 media ethernet rspan
S3900-48T4S(config-vlan)#exit
S3900-48T4S(config)#rspan session 1 source interface e 1/5
S3900-48T4S(config)#rspan session 1 remote vlan 200 source uplink e 1/10
S3900-24T4S#configure terminal
S3900-24T4S(config)#vlan database
S3900-24T4S(config-vlan)#vlan 200 media ethernet rspan
S3900-48T4S(config-vlan)#exit
S3900-24T4S(config)#rspan session 1 destination interface e 1/5
S3900-24T4S(config)#rspan session 1 remote vlan 200 destination uplink e 1/10
S3900-48T4S#show rspan session
RSPAN Session ID : 1
Source Ports (mirrored ports)
RX Only : None
TX Only : None
BOTH : Eth 1/5
Destination Port (monitor port) : None
Destination Tagged Mode : None
Switch Role : Source
RSPAN VLAN : 200
RSPAN Uplink Ports : Eth 1/10
Operation Status : Up
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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