The S3900-24F4S-R is an L2+ managed stackable switch designed for SMBs, enterprises, midmarket, and branch office networks, offering a lower total cost of ownership. It features 24x 1G SFP ports (including 8x combo ports) and 4x 10G SFP+ uplinks, delivering a switching capacity of 128 Gbps and a forwarding rate of 96 Mpps. With dual redundant power supplies and a dual-fan design, the switch ensures reliable, uninterrupted operation even during power supply failures.
The switch supports stacking technology, which simplifies operations by interconnecting up to 8 switches that can be managed as a single logical device. It supports advanced features such as OSPF, Voice VLAN, robust QoS, Static Routing, and IPv6. Additionally, it offers simple device and network management through a Command-Line Interface (CLI) and an intuitive on-box web UI.
S3900-24F4S-R Switch Overall Introduction | FS 
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Product Highlights
24-Port Gigabit Ethernet L2+ Switch, 16x 1Gb SFP, 8x 1Gb RJ45/SFP Combo Ports, with 4x 10Gb SFP+ Uplinks, Stackable Switch
Software Spotlights
Redundant, built-in power supplies
Up to 8 units stacking
IEEE 802.3ad Link Aggregation (LACP)
Graceful protocol restart (OSPF)
Virtual router redundancy protocol (VRRP)
Rapid link detection protocol (RLDP)
Rapid Ethernet uplink protection protocol (REUP)
Bidirectional forwarding detection (BFD)
Ethernet Ring Protection Switching (ERPS)
The spanning tree protocols (STPs)
IEEE 802.1x, RADIUS, TACACS+, Local Authentication
Port Security, IP+MAC+port binding
Port-based Authentication
Mac-based Authentication HTTPS and SSL (v3)
DHCP Snooping
IP Source Guard (IPSG)
DoS Protection
SNMP V1/V2/V3, HTTP, log
Remote monitoring (RMON)
Syslog, Web-based management, Telnet, SSH
Command-Line Interface (CLI)
LLDP (802.1ab)
Network Monitoring through Sampled Flow (sFlow)
