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SG300-28SFP-K9-UK
Cisco SG300-28SFP-K9-UK Small Business 300 26-Port Gigabit S...
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SG300-28SFP-K9-UK is a fanless, Layer 2+ managed fiber switch with 26 dedicated Gigabit SFP interfaces and two Gigabit RJ-45/SFP combo interfaces. The fixed connections support fiber-based small-business networks, while each combo position accepts either copper or fiber, not both simultaneously. A full-width, 1U rack-mount chassis places the Cisco 300 Series model alongside other rack equipment without requiring an uplink card. No PoE output is available for phones, cameras or access points. The discontinued SG300-10SFP-K9 uses an external power adapter where this model contains its supply internally. The SG300-28SFP configuration serves installations connecting multiple optical links rather than a bank of copper endpoints, with interface management available locally or remotely.
SG300-28SFP-K9-UK price is is available on request. Get immediate quote.
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56 Gbps switching capacity provides wire-speed switching across the Gigabit interfaces. 41.67 Mpps forwarding at a 64-byte packet size supplies a separate sizing reference for small-packet traffic. Static IPv4 routing supports communication between VLANs after Layer 3 system mode is enabled; routes are configured manually rather than learned dynamically. SG300-28SFP-K9-UK combines 128 MB of DRAM with 16 MB of flash for its embedded software and configuration storage. Administrators can use the web interface, a local console, or the CLI over SSH or Telnet, with remote command access enabled before connection. 28.2W maximum consumption at 220V supplies the electrical-load figure for equipment planning, while the AC input accepts 100-240V at 50-60 Hz. Operation from 0°C to 50°C sets the permitted equipment-room temperature range. The fixed interfaces do not provide 10G connectivity, and the switch does not support hardware stacking.
Specify SG300-28SFP-K9-UK as new sealed or certified refurbished, identifying the required condition and optical accessories on the purchase order. Certified refurbished units are inspected and bench-tested, with every port linked at rated speed, firmware verified and configuration wiped to factory default. ORM provides up to a 3-year extended warranty for new units and up to 1 year for certified refurbished units, plus 30-day returns on every condition, terms apply; Cisco's limited lifetime hardware warranty and service ended October 31, 2023. For enterprise and volume orders, ORM Systems accepts POs, offers Net-30 for government and RMA with advance replacement, and provides regional stock and RMA coverage across the UK, EU, US and MEA.
| Key Specs | Key Spec Values |
|---|---|
Port Configuration | 26 x 1G SFP / 2 x 1G RJ-45/SFP combo |
Max Power Draw | 28.2W at 220V |
Cooling | Fanless |
Lifecycle Status | Cisco support ended October 31, 2023 |
When consolidating several Gigabit fiber connections, the 8 Mb packet buffer is shared dynamically across all ports rather than reserved per link. Bursty traffic from several sources therefore shares the same buffer resource. Review the traffic mix and specify the intended connection layout before ordering.
When an installed fiber switch needs an on-hand spare, match the full SG300-28SFP-K9-UK identifier rather than substituting a copper-focused model. Certified refurbished units are inspected and bench-tested, including power-on, POST, clean boot and optics bay recognition. Specify the required condition and matching fiber accessories on the purchase order.
When staging an existing configuration for a lab or replacement, changing between Layer 2 and Layer 3 system modes reboots the switch and removes the startup configuration. Save the intended configuration before changing modes, then specify the required operating mode in the staging instructions.
10G fiber uplinks
SG300-28SFP-K9-UK provides Gigabit SFP interfaces, not 10G uplinks. A deployment requiring 10G fiber cannot meet its uplink-speed requirement with this switch.
PoE-powered phones or access points
SG300-28SFP-K9-UK supplies no PoE output. Powered endpoints need a separate power source; the fiber-focused interfaces do not substitute for powered copper access ports.
Active Cisco service coverage
Cisco service for SG300-28SFP-K9-UK ended October 31, 2023. The replacement chain ends with discontinued CBS350-24S-4G-UK, which has no current direct migration product.
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| SG300-28SFP-K9-UK |  SRW2008P-K9-UK |  SG300-28SFP-K9-EU |  SG300-20 |  SG300-10PP-K9-NA | |
|---|---|---|---|---|---|
| Depth | 257 mm | 170 mm | 257 mm | 202.5 mm | 170 mm |
| Ethernet Technology | Gigabit Ethernet | Gigabit Ethernet | Gigabit Ethernet | Gigabit Ethernet | Gigabit Ethernet |
| Flash Memory | 16 MB | 16 MB | 16 MB | 16 MB | 16 MB |
| Form Factor | Rack-Mount 1U | Desktop | Rack-Mount 1U | Rack-Mount 1U | Desktop |
| Height | 44.45 mm | 44.45 mm | 44.45 mm | 44.45 mm | 44.45 mm |
| Manufacturer Part Number | SG300-28SFP-K9-UK | SRW2008P-K9-UK | SG300-28SFP-K9-EU | SG300-20 | SG300-10PP-K9-NA |
| Memory | 128 MB | 128 MB | 128 MB | 128 MB | 128 MB |
| Power Consumption | 28.2W | 81.44W | 28.2W | 16.26W | 83.47W |
| SFP Ports | 26 x 1GbE / 2 x 1GbE (Combo, shared with RJ-45) | 2 x 1GbE (Combo, shared with RJ-45) | 26 x 1GbE / 2 x 1GbE (Combo, shared with RJ-45) | 2 x 1GbE (Combo, shared with RJ-45) | 2 x 1GbE (Combo, shared with RJ-45) |
| Switching Capacity | 56 Gbps | 20 Gbps | 56 Gbps | 40 Gbps | 20 Gbps |
| Width | 440 mm | 279.4 mm | 440 mm | 440 mm | 279.4 mm |
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SG300-28SFP-K9-UK identifies a Cisco 300 Series Gigabit managed SFP switch with 28 total interfaces. The 28SFP portion corresponds to 26 dedicated SFP interfaces plus two copper/SFP combo interfaces. K9-UK remains part of the complete ordering identifier and should be retained on the purchase order.
SG300-28SFP-K9-UK is managed through its web interface or CLI using a local console, SSH or Telnet. Remote CLI access requires an IP address and the corresponding remote service to be enabled first. These management paths configure the switch itself rather than requiring a cloud dashboard.
SG300-28SFP-K9-UK is discontinued: end of sale was October 4, 2018, and the last date of Cisco support was October 31, 2023. Software maintenance ended October 4, 2019. New sealed condition does not restart Cisco support or extend those lifecycle milestones.
ORM Systems offers SG300-28SFP-K9-UK new sealed or certified refurbished, with new-unit extended warranty coverage up to 3 years and refurbished coverage up to 1 year. Both conditions include 30-day returns, terms apply. Cisco's original limited lifetime hardware warranty and service ended October 31, 2023.
Yes, SG300-28SFP-K9-UK can operate dedicated fiber connections alongside copper connections in its combo interfaces. Each combo interface shares one logical connection between an RJ-45 socket and an SFP cage, so both media cannot operate simultaneously in the same combo position. The maximum remains 28 active interfaces.
SG300-28SFP-K9-UK provides 56 Gbps switching capacity and 41.67 Mpps forwarding with 64-byte packets. These are separate performance measures: switching capacity describes aggregate bandwidth, while packet forwarding describes packet-processing throughput. Both figures belong to this fiber model and support its Gigabit interface configuration.
Cisco SG300-28SFP supports MGBSX1 Gigabit multimode optics and MGBLX1 Gigabit single-mode optics. MGBSX1 supports links to 300 m, while MGBLX1 supports links to 10 km. Select the transceiver for the installed fiber and match the far-end interface rather than choosing solely by connector appearance.
SG300-28SFP-K9-UK consumes a maximum of 28.2W at 220V, compared with 28W at 110V. Its internal universal AC supply accepts 100-240V at 50-60 Hz. These figures cover the switch's electrical consumption; there is no additional PoE output budget for attached endpoints.
Yes, Cisco 300 Series switches support static IPv4 routing between VLANs when Layer 3 system mode is enabled. Routes are entered manually rather than learned through a dynamic routing protocol. Changing the system mode requires a reboot and removes the startup configuration, so save the intended configuration beforehand.
SRW2024P-K9 provides 24 PoE-capable copper ports with a shared 180W budget, while SG300-28SFP-K9-UK provides no PoE output. Both are discontinued 300 Series models. The copper model serves an existing powered-endpoint installation; the SFP model serves an existing network whose connections are primarily fiber.
SG300-28SFP-K9-UK has an internal AC supply, while SG300-10SFP-K9 uses an external AC adapter. Both are discontinued fiber-focused 300 Series switches. The internal-supply model suits an existing installation standardized on chassis-contained power; the external-adapter model suits replacement requirements that retain the smaller switch's separate power arrangement.
SRW2048-K9 has 52 total Gigabit interfaces, while SG300-28SFP-K9-UK has 28. The higher-density model uses copper ports rather than the SFP-focused arrangement, and both are discontinued. SRW2048-K9 serves an existing dense copper installation; the SFP model serves an existing fiber-centered connection layout.
SG300-28SFP-K9-UK was replaced by SG350-28SFP-K9-UK, which is also discontinued and was subsequently replaced by the discontinued CBS350-24S-4G-UK. That final model has no current direct migration product. The original replacement should therefore not be treated as a current-generation purchase simply because it appears later in the chain.
Yes, Cisco SG300-28SFP is a full-width, 1U rack-mount switch measuring 440 mm wide, 44.45 mm high and 257 mm deep. Its weight is 3.34 kg. Allow additional clearance for the installed fiber connections and power cord when checking the usable depth of an existing equipment cabinet.
No, SG300-28SFP-K9-UK does not support hardware stacking. Connections between multiple switches use their normal Ethernet interfaces rather than dedicated stack connections, and each switch remains independently managed. A purchase intended to extend an existing hardware stack cannot use this model as another stack member.
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