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SG250X-48P-K9-UK
Cisco SG250X-48P-K9-UK 250 48-Port Gigabit PoE+ Switch, 4x10...
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SG250X-48P-K9-UK combines 48 Gigabit PoE+ access ports with four fixed 10G uplinks: two 10GBASE-T copper connections and two SFP+ cages. This Layer 2+ smart-managed switch occupies a full-width 1U rack position within the Cisco 250 Series Smart Switches family for small-business networks. Powered connections serve IP phones, wireless access points, and video surveillance endpoints, while the mixed-media uplinks accommodate copper equipment connections and fiber runs without a removable uplink card. The discontinued SG250X-48-K9-UK retains the access-port density but supplies no PoE. Automatic voice VLAN assignment separates telephone traffic and applies corresponding service priorities. Auto Smartports can apply port roles according to discovered devices, giving the 48-port Gigabit PoE+ configuration policy-based operation rather than the fixed behavior of an unmanaged switch.
SG250X-48P-K9-UK price is is available on request. Get immediate quote.
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176 Gbps switching capacity supports concurrent access and uplink traffic through a nonblocking switching fabric. 130.94 Mpps forwarding with 64-byte packets provides the packet-rate specification for small-packet workloads. 382W of shared PoE power covers aggregate endpoint demand, while static IPv4 routing supports 32 routes for local subnet communication. SG250X-48P-K9-UK uses 512 MB of DRAM and 256 MB of flash for device operation and image storage. Its 24 Mb packet buffer is dynamically shared across ports rather than reserved independently for each connection. STP/RSTP/MSTP and LACP provide loop control and link aggregation; eight hardware queues support traffic prioritization. Management includes a browser interface, CLI access, and SNMP, with dual software images supporting firmware maintenance. Four fans provide active cooling, so this is not a fanless switch. Port security and access control lists control endpoint access and filter traffic, including rules applied on ingress or egress.
SG250X-48P-K9-UK is offered new sealed or certified refurbished; refurbished units are inspected and bench-tested for power-on and POST, clean boot, every port linking at rated speed, and PoE output under load on every powered port. ORM warranty coverage is up to a 3-year extended warranty for new units or up to 1 year for certified refurbished units, with 30-day returns on every condition; terms apply. Cisco's limited lifetime hardware warranty has 1-year fan and power-supply coverage, and Cisco service ends October 31, 2026. Specify condition and accessories on the PO; enterprise and volume orders support Net-30 for government, RMA with advance replacement, and regional stock/RMA across the UK, EU, US, and MEA.
| Key Specs | Key Spec Values |
|---|---|
Port Configuration | 48 x 1G PoE+, 2 x 10GBASE-T, 2 x 10G SFP+ |
PoE Budget | 382W shared |
Max Power Draw | 502.3W |
Cooling | 4 fans |
Lifecycle Status | End of sale October 30, 2021; support ends October 31, 2026 |
Replacement PID | C1200-48P-4X via discontinued CBS250-48P-4X-UK |
For branch rollouts using centrally prepared settings, text-editable configuration files and DHCP-based autoconfiguration support repeatable preparation across multiple units. Cisco Network Plug and Play also supports provisioning updates. Specify the chosen provisioning method, configuration files, and management-network access before adding staged quantities to the purchase order.
For a site moving inter-VLAN communication onto the access switch, the limit of 16 IP interfaces determines how many routed segments can terminate locally. Physical ports, VLAN interfaces, link aggregation groups, and loopback interfaces support Layer 3 addressing. Count the required interfaces and specify the routing configuration before ordering.
For a troubleshooting lab or replacement-validation bench, port mirroring can copy traffic from four source ports to one analysis port. Cable diagnostics, event logging, and traffic monitoring provide additional checks before an installed unit is exchanged. Specify the analyzer connection and the ports to exercise when preparing the purchase order.
Simultaneous 30W power on every port
The shared PoE allocation cannot supply maximum per-port power simultaneously across every powered connection. A deployment requiring all ports at maximum demand exceeds the available power budget.
Four optical 10G uplinks
Only two uplinks use SFP+; the other two use 10GBASE-T copper. C1200-48P-4X provides four 10G SFP+ uplinks while retaining 48 Gigabit PoE access ports.
Ongoing software maintenance for deployment
Software maintenance ended October 30, 2022, and Cisco support ends October 31, 2026. C1200-48P-4X is the current migration endpoint for purchases requiring a newer lifecycle.
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| SG250X-48P-K9-UK |  SG250X-48P-K9-EU |  SG250X-24-K9-UK |  SG250X-48-K9-NA |  SG250X-24 | |
|---|---|---|---|---|---|
| Depth | 350 mm | 350 mm | 257 mm | 257 mm | 257 mm |
| Ethernet Technology | Gigabit Ethernet | Gigabit Ethernet | Gigabit Ethernet | Gigabit Ethernet | Gigabit 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 | SG250X-48P-K9-UK | SG250X-48P-K9-EU | SG250X-24-K9-UK | SG250X-48-K9-NA | SG250X-24 |
| Memory | 512 MB | 512 MB | 512 MB | 512 MB | 512 MB |
| Power Consumption | 502.3W | 502.3W | 29.1W | 46W | 29.1W |
| Switching Capacity | 176 Gbps | 176 Gbps | 128 Gbps | 176 Gbps | 128 Gbps |
| Weight | 4.84 kg | 4.84 kg. | 2.66 kg. | 3 kg | 2.66 kg |
| Width | 440 mm | 440 mm | 440 mm | 440 mm | 440 mm |
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SG250X-48P-K9-UK identifies a 48-port Gigabit PoE+ smart switch with 10G uplinks. SG250X names the model group, 48 denotes the access-port count, P identifies the powered configuration, and UK selects the regional ordering version used for the United Kingdom and several additional markets.
SG250X-48P-K9-UK supports an HTTP/HTTPS web interface, full or menu-based CLI over SSH or Telnet, SNMP, Smart Network Application, Cisco FindIT Network Manager, and Cisco Active Advisor. An embedded FindIT Network Probe and Cisco Network Plug and Play support discovery and provisioning. CLI access supports three privilege levels.
SG250X-48P-K9-UK provides a shared 382W PoE budget across 48 powered Gigabit ports, with a maximum of 30W on an individual port. The allocation is shared rather than dedicated at maximum power to every connection. Simultaneous endpoint demand must remain within the total available budget.
SG250X-48P-K9-UK has two fixed 10GBASE-T copper uplinks and two fixed 10G SFP+ uplinks. Supported optical choices include SFP-10G-SR for multimode fiber and SFP-10G-LR for single-mode fiber. These connections do not require an uplink expansion card, but the selected optical connections require matching transceivers.
SG250X-48P-K9-UK supports static IPv4 routing between local network segments, with 32 static routes and 16 IP interfaces. Routing interfaces can use physical ports, link aggregation groups, VLAN interfaces, or loopback interfaces. Its static-routing capability places the switch in the Layer 2+ category rather than a dynamic-routing configuration.
SG250X-48P-K9-UK reaches 502.3W worst-case consumption at 110V with PoE, or 487.1W at 220V. System-only consumption is 68.4W at 110V and 70.3W at 220V. These are AC-input figures, distinct from the power allocated to downstream PoE devices, and support electrical-load planning.
The Cisco 250 48-port PoE+ configuration uses a full-width 1U enclosure measuring 440 mm wide, 44 mm high, and 350 mm deep, with a weight of 4.84 kg. Factory packaging includes a mounting kit and power cord. Rack planning must accommodate enclosure depth and attached cabling.
SG250X-48P-K9-UK is discontinued, with end of sale on October 30, 2021, software maintenance ending October 30, 2022, and Cisco support ending October 31, 2026. Its direct replacement, CBS250-48P-4X-UK, is also discontinued. The forward migration chain reaches C1200-48P-4X rather than stopping at the older replacement.
SG250X-48P-K9-UK supplies PoE+ on its Gigabit access ports, whereas SG250X-48-K9-UK supplies no PoE. Both models are discontinued. The powered version serves legacy installations with phones, access points, or other powered endpoints; the non-PoE version serves existing connections whose devices receive power independently.
SG250X-48P-K9-UK has 48 Gigabit access ports versus 24 on SG250X-24P-K9-UK. Both models are discontinued PoE configurations. The larger model fits an existing installation requiring greater connection density, while the smaller model fits a lower-port-count legacy requirement. The distinction is access-port density rather than a different software license tier.
C1200-48P-4X has four 10G SFP+ uplinks, whereas SG250X-48P-K9-UK has two SFP+ and two 10GBASE-T uplinks. The migration chain reaches C1200-48P-4X through discontinued CBS250-48P-4X-UK. The newer model suits all-optical uplink designs; the older model suits maintaining an existing mixed-media installation.
The SG250X 48-port PoE model provides 176 Gbps switching capacity and 130.94 Mpps forwarding with 64-byte packets. Its switching fabric is nonblocking, and a 24 Mb packet buffer is dynamically shared across connections. Switching bandwidth, packet forwarding, and buffering describe different aspects of traffic handling.
ORM offers SG250X-48P-K9-UK new sealed or certified refurbished, with up to a 3-year extended warranty on new units and up to 1 year on refurbished units. Both conditions have 30-day returns; terms apply. Cisco's limited lifetime hardware warranty includes 1-year fan and power-supply coverage; Cisco service ends October 31, 2026.
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