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SF250-48-K9-UK
Cisco SF250-48-K9-UK 250 48-Port Fast Ethernet Switch, 4x1G...
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SF250-48-K9-UK combines fanless operation with 48 Fast Ethernet access ports for small-business networks retaining 10/100 endpoints. Four fixed Gigabit uplinks comprise two dedicated SFP slots and two copper/SFP combo connections; each combo connection activates either its copper interface or its fiber interface. The 1U chassis provides Layer 2+ switching without supplying power to attached devices. Within the Cisco 250 Series Smart Switches family, the discontinued SF250-48HP-K9-UK adds PoE+ for powered endpoints. This 48-port Fast Ethernet smart switch keeps its faster connections on the uplink side, so desktop and device connections remain limited to 100 Mbps. The distinction matters when retaining existing endpoint cabling while connecting the access switch to a Gigabit aggregation network.
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17.6 Gbps switching capacity supports nonblocking operation across the available connections, while 13.1 Mpps forwarding applies to 64-byte packets. Static IPv4 routing supports 32 routes for networks using manually maintained paths rather than dynamic route exchange. SF250-48-K9-UK carries 512 MB of memory and 256 MB of flash for its embedded software and configuration. A dynamically shared 24 Mb packet buffer accommodates traffic across all ports, while the MAC table holds 8000 addresses. Support for 255 active VLANs provides workgroup segmentation, and eight hardware queues organize traffic using strict-priority or weighted round-robin scheduling. STP, RSTP and MSTP handle loop prevention; LACP supports aggregated links. Browser configuration offers basic and advanced modes, and a full or menu-based CLI supports scripted administration. SNMP monitoring and the embedded FindIT Network Probe provide additional management paths without turning network discovery or centralized management into hardware stacking.
Order SF250-48-K9-UK new sealed or certified refurbished, and specify the condition, regional power cord, mounting kit and required optics on the purchase order. Certified refurbished units are inspected and bench-tested for power-on, POST, rated-speed links on every port, optics bay recognition and clean boot; firmware is verified and configurations are wiped to factory default. ORM offers up to 3-year extended coverage for new units, up to 1 year for refurbished units, and 30-day returns on every condition; terms apply, while Cisco coverage remains subject to eligibility and ends July 31, 2027. For enterprise and volume requirements, POs are accepted, Net-30 is available for government, and RMA with advance replacement accompanies regional stock and RMA coverage across the UK, EU, US and MEA.
| Key Specs | Key Spec Values |
|---|---|
Port Configuration | 48 x 10/100, 2 x 1G combo, 2 x SFP |
Max Power Draw | 24.2W |
Cooling | Fanless |
Lifecycle Status | End of sale July 30, 2022; support ends July 31, 2027 |
Replacement PID | C1200-48T-4G via discontinued CBS250-48T-4G-UK. |
When separate workgroups need local communication without sending every internal exchange through an external router, the switch supports 16 IP interfaces and DHCP relay across IP domains. Physical ports, VLAN interfaces, link aggregation groups and loopback interfaces can carry Layer 3 addressing. Specify the interface plan before the purchase order.
When multiple locations need a common configuration baseline, text-editable configuration files can be prepared centrally and downloaded to individual switches. SCP protects file transfers, and DHCP autoconfiguration supports centrally supplied settings. Establish site-specific addressing, credentials and configuration ownership before specifying the staging requirements on the purchase order.
When a replacement must be prepared before installation, the front-panel USB Type-A connection supports local image and configuration transfer, while dual software images support upgrade preparation. Keep the intended production configuration separate from temporary lab settings, and specify the required firmware verification and configuration handoff before ordering.
Gigabit speed on every access port
The access ports stop at 100 Mbps. C1200-48T-4G provides 48 Gigabit access ports and four 1G SFP uplinks in the forward replacement chain.
Ethernet power for connected endpoints
The switch supplies data connections without PoE output. Phones, cameras and access points requiring Ethernet-delivered power need a powered switch or a separate endpoint power arrangement.
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| SF250-48-K9-UK |  SF250-24-K9-UK |  SF250-24P-K9 |  SF250-24P-K9-NA |  SF250-48-K9 | |
|---|---|---|---|---|---|
| Depth | 257 mm | 202 mm | 257 mm | 257 mm | 257 mm |
| Ethernet Technology | Fast Ethernet | Fast Ethernet | Fast Ethernet | Fast Ethernet | Fast Ethernet |
| Flash Memory | 256 MB | 256 MB | 256 MB | 256 MB | 256 MB |
| Form Factor | Rack-Mount 1U | Rack-Mount 1U | Rack-Mount 1U | Rack-Mount 1U | Rack-Mount 1U |
| Height | 44 mm | 44 mm | 44 mm | 44 mm | 44 mm |
| Manufacturer Part Number | SF250-48-K9-UK | SF250-24-K9-UK | SF250-24P-K9 | SF250-24P-K9-NA | SF250-48-K9 |
| Memory | 512 MB | 512 MB | 512 MB | 512 MB | 512 MB |
| Power Consumption | 24.2W | 10.9W | 238W | 238W | 24.2W |
| SFP Ports | 2 x 1GbE / 2 x 1GbE (Combo, shared with RJ-45) | 2 x 1GbE / 2 x 1GbE (Combo, shared with RJ-45) | 2 x 1GbE / 2 x 1GbE (Combo, shared with RJ-45) | 2 x 1GbE / 2 x 1GbE (Combo, shared with RJ-45) | 2 x 1GbE / 2 x 1GbE (Combo, shared with RJ-45) |
| Switching Capacity | 17.6 Gbps | 12.8 Gbps | 12.8 Gbps | 12.8 Gbps | 17.6 Gbps |
| Weight | 3.57 kg. | 2.72 kg | 4.1 kg. | 4.1 kg. | 3.57 kg |
| Width | 440 mm | 440 mm | 440 mm | 440 mm | 440 mm |
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Every device is inspected, bench-tested, and firmware-verified, with configurations wiped before dispatch. Additional testing can be arranged to confirm full working condition on request.
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SF250-48-K9-UK identifies a Cisco 250 Series Fast Ethernet smart switch with 48 access ports and the UK regional ordering suffix. The UK suffix also covers Saudi Arabia, Qatar, Kuwait, Singapore, Hong Kong and Malaysia. Uplinks comprise two Gigabit copper/SFP combo connections plus two dedicated SFP connections.
SF250-48-K9-UK supports HTTP/HTTPS web management, full or menu-based CLI over SSH or Telnet, SNMP and Smart Network Application. Additional paths include FindIT Network Manager with its embedded probe, FindIT Network Discovery Utility and Cisco Active Advisor. Cisco Network Plug and Play supports provisioning, while USB supports local configuration and image transfer.
Yes, SF250-48-K9-UK reached end of sale on July 30, 2022, and its last date of support is July 31, 2027. Software maintenance ended July 30, 2023. Reseller stock does not restart these milestones, so a remaining Cisco support requirement must fit within the published service window.
SF250-48-K9-UK is offered new sealed or certified refurbished, with ORM coverage up to 3 years extended for new units and up to 1 year for refurbished units. Both conditions have 30-day returns; terms apply. Cisco's limited lifetime hardware warranty, with 1-year power-supply coverage, cannot extend beyond July 31, 2027; eligibility follows Cisco warranty terms.
SF250-48-K9-UK provides four Gigabit uplink connections: two dedicated SFP ports and two copper/SFP combo ports. Each combo port uses either its RJ-45 connection or its SFP connection, not both simultaneously. The fixed uplink architecture has no removable uplink card and does not provide 10G uplink operation.
Yes, SF250-48-K9-UK supports static IPv4 routing with 32 static routes and 16 IP interfaces. Layer 3 interfaces can use physical ports, link aggregation groups, VLAN interfaces or loopback interfaces. These capabilities support manually configured inter-VLAN paths; DHCP relay can forward requests between IP domains when the DHCP server resides elsewhere.
The 250 Series Fast Ethernet switch accepts MGBSX1 for Gigabit multimode fiber connections to 500 m and MGBLX1 for Gigabit single-mode connections to 10 km. Select the transceiver against fiber type, link distance and the remote interface. These optics operate at the switch's 1G uplink speed rather than upgrading it to 10G.
Yes, the Cisco 250 Series 48-port Fast Ethernet non-PoE switch is fanless and uses an internal universal AC power supply. Its operating temperature range is 0°C to 50°C. Installation planning must preserve ventilation around the chassis even though cooling does not depend on an internal fan or fan-replacement schedule.
SF250-48HP-K9-UK provides PoE+ across 48 access ports with a shared 195W budget, whereas SF250-48-K9-UK provides no PoE output. Both models are discontinued. The non-PoE model suits separately powered endpoints; the PoE+ model addresses Ethernet-powered devices whose combined demand fits its shared budget rather than simultaneous maximum power on every port.
SF250-48-K9-UK provides 48 Fast Ethernet access ports, while SF250-24-K9-UK provides 24. Both retain two Gigabit copper/SFP combo connections and two dedicated SFP connections, and both are discontinued. The larger model suits higher endpoint density; the smaller model suits installations that need fewer access connections without changing the uplink arrangement.
C1200-48T-4G provides 48 Gigabit access ports, whereas SF250-48-K9-UK provides 48 Fast Ethernet access ports. C1200-48T-4G follows the discontinued CBS250-48T-4G-UK in the replacement chain. The older model suits like-for-like retention of 10/100 access; C1200-48T-4G suits buyers moving those endpoint connections to Gigabit while retaining four 1G fiber uplinks.
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