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SG250X-48-K9
Cisco SG250X-48-K9 250 48-Port Gigabit Switch, 4x10G Uplinks
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SG250X-48-K9 combines 48 Gigabit Ethernet access ports with four fixed 10G uplinks split between two 10GBASE-T connections and two SFP+ slots. This smart-managed, Layer 2+ switch belongs to the Cisco 250 Series Smart Switches family and serves small-business networks connecting computers, printers and other separately powered equipment. Its full-width, 1U rack chassis accommodates copper and fiber connections without requiring an uplink expansion card. The discontinued SG250X-48P-K9-NA adds PoE+ for legacy installations that need endpoint power over Ethernet. Browser-based setup and a scriptable command-line interface provide different operating workflows, while network discovery and monitoring tools extend administration beyond an individual device. The mixed uplink interfaces distinguish this configuration from switches that require transceivers for every aggregation connection.
SG250X-48-K9 price for new stock is $801.15, a 38.8% saving from the Cisco list price of $1,308.00. SG250X-48-K9 refurb price is $504.00. SG250X-48-K9 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for SG250X-48-K9 for additional pricing. Browse the full Cisco SG250X Switches series or explore all Cisco products.
176 Gbps switching capacity accommodates access and uplink traffic, while 130.94 Mpps forwarding is rated with 64-byte packets. Static IPv4 routing supports 32 routes and 16 IP interfaces for inter-VLAN communication without dynamic route exchange. SG250X-48-K9 includes 512 MB DRAM and 256 MB flash for control software and configuration storage. A shared 24 Mb packet buffer serves traffic across the switch instead of assigning the entire buffer to an individual port. STP/RSTP/MSTP provide loop prevention, while LACP supports link aggregation within the supported group limits. Dual firmware images support software upgrade recovery, with HTTP/HTTPS, TFTP and SCP available for image transfers. The SG250X-48 uses two fans, and its 46W maximum consumption belongs in rack power planning. Hardware stacking is absent, so multiple units remain separate forwarding systems. Cable diagnostics and syslog assist fault isolation, while port security restricts learned source MAC addresses on access connections.
ORM Systems offers SG250X-48-K9 new sealed with up to a 3-year extended warranty or certified refurbished with up to a 1-year warranty; returns cover 30 days on every condition, terms apply, while Cisco's separate Limited Lifetime warranty is bounded by October 31, 2026 and applicable eligibility terms. Certified refurbished units are inspected and bench-tested for power-on and POST, clean boot, every port linking at rated speed and optics bay recognition, with firmware verified and configuration wiped to factory default. Specify condition, quantity and required accessories on the purchase order. For enterprise and volume orders, PO acceptance, Net-30 for government, RMA with advance replacement and regional stock/RMA across the UK, EU, US and MEA are available.
| Key Specs | Key Spec Values |
|---|---|
Port Configuration | 48 x 1G / 2 x 10GBASE-T / 2 x 10G SFP+ |
Max Power Draw | 46W |
Cooling | 2 fans |
Lifecycle Status | Sales ended October 30, 2021; support ends October 31, 2026 |
Replacement PID | C1200-48T-4X |
When consolidating workgroups onto shared switching, the 250 Series supports 255 active VLANs and assigns voice traffic to a separate voice VLAN. That makes the segmentation inventory, not just the cable count, part of the purchase decision. Specify required VLANs and voice handling before the PO.
For a branch rollout requiring repeatable initial configuration, text-editable configuration files and SCP autoconfiguration support staging from an approved template. The front-panel USB Type-A port also handles files and images. Specify the configuration baseline, management addressing and required staging procedure before releasing the purchase order.
When a lab purchase must support packet analysis, port mirroring can copy four source ports to one destination port. VLAN mirroring offers a separate way to select traffic for an analyzer. Check the required observation points and reserve the analyzer connection before specifying the staging quantity.
Ethernet power for connected endpoints
SG250X-48-K9 supplies no PoE output. C1200-48P-4X provides endpoint power while retaining 48 Gigabit access ports, making it the current powered alternative in the replacement chain.
Four separate 10G fiber uplinks
SG250X-48-K9 has only two SFP+ slots; its other two 10G uplinks use copper. C1200-48T-4X provides four 10G SFP+ uplinks for the current replacement configuration.
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| SG250X-48-K9 |  SG250X-48P-K9-EU |  SG250X-24P-K9-EU |  SG250X-48-K9-NA |  SG250X-48P-K9-NA | |
|---|---|---|---|---|---|
| Depth | 257 mm | 350 mm | 257 mm | 257 mm | 350 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-48-K9 | SG250X-48P-K9-EU | SG250X-24P-K9-EU | SG250X-48-K9-NA | SG250X-48P-K9-NA |
| Memory | 512 MB | 512 MB | 512 MB | 512 MB | 512 MB |
| Power Consumption | 46W | 502.3W | 260.1W | 46W | 502.3W |
| Switching Capacity | 176 Gbps | 176 Gbps | 128 Gbps | 176 Gbps | 176 Gbps |
| Weight | 3 kg | 4.84 kg. | 3.86 kg. | 3 kg | 4.84 kg |
| Width | 440 mm | 440 mm | 440 mm | 440 mm | 440 mm |
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SG250X-48-K9 identifies the non-PoE 250 Series switch with 48 Gigabit access ports and four 10G uplinks. SG250X is the model family, 48 is the access-port count, and K9 remains part of the complete identifier. SG250X-48-K9-NA is the regional ordering form for the United States and other North American markets.
SG250X-48-K9 supports HTTP/HTTPS browser management, a full or menu-based CLI over SSH/Telnet, SNMP, Smart Network Application, FindIT Network Manager and Cisco Active Advisor. FindIT Network Discovery Utility assists device discovery, while the embedded FindIT Network Probe supports network-level oversight without requiring a separate probe host.
SG250X-48-K9 is discontinued: sales ended October 30, 2021, and the last date of support is October 31, 2026. Its original replacement, CBS250-48T-4X-NA, is also discontinued. The replacement chain now leads to C1200-48T-4X, so procurement should distinguish legacy hardware sparing from a migration to current equipment.
ORM Systems offers SG250X-48-K9 new sealed with up to a 3-year extended warranty, or certified refurbished with up to a 1-year warranty. Returns cover 30 days on every condition; terms apply. Cisco's separate Limited Lifetime warranty is bounded by the October 31, 2026 last date of support and applicable eligibility terms.
Yes, SG250X-48-K9 supports static IPv4 routing with 32 routes and 16 IP interfaces. Routed interfaces can use a physical port, LAG, VLAN interface or loopback interface. The feature set provides static routing rather than dynamic routing, so verify the route inventory and interface plan before ordering.
The 250 Series supports SFP-10G-SR for multimode fiber and SFP-10G-LR for single-mode fiber on its SFP+-equipped models. SG250X-48-K9 has two such slots. SFP-H10GB-CU1M, SFP-H10GB-CU3M and SFP-H10GB-CU5M provide direct-attach alternatives; select the cable or transceiver against the actual link medium and distance.
SG250X-48-K9 uses a fixed internal AC power supply accepting 100-240V AC, without a redundant internal supply option. Worst-case system consumption is 46W at 110V and 45.6W at 220V. These figures cover switch operation; the hardware does not supply Ethernet power to connected endpoints.
No, 250 Series Smart Switches do not form a hardware stack. Network-level management through Smart Network Application or FindIT Network Manager does not combine their forwarding systems into one stacked switch. Plan each unit as an independently configured device when matching an existing installation or specifying spare hardware.
The 250 Series SG250X-48 occupies 1U in a rack and measures 440 mm wide, 44 mm high and 257 mm deep. Its weight is 3 kg. Allow additional space for front connections and power cabling, and account for fan cooling when selecting the installation position.
The 250 Series supports 255 active VLANs simultaneously, including port-based and tag-based VLAN configurations. Management and guest VLAN functions are available, and voice VLAN handling assigns voice traffic to a dedicated VLAN with appropriate QoS treatment. Compare the required segmentation inventory with this active-VLAN limit before ordering.
SG250X-48-K9 has no PoE output, while the discontinued SG250X-48P-K9-NA supplies PoE+ across 48 access ports with a shared 382W budget. The non-PoE model fits separately powered equipment; the powered sibling fits legacy installations requiring Ethernet endpoint power, rather than buyers planning a current-generation migration.
SG250X-48-K9 provides 48 Gigabit access ports, compared with 24 on the discontinued SG250X-24-K9-NA. Both retain the same copper and SFP+ uplink arrangement. Existing installations with more endpoint connections fit the larger model; smaller legacy sites can match the lower-density hardware without treating either switch as a current migration target.
C1200-48T-4X provides four 10G SFP+ uplinks, whereas SG250X-48-K9 divides its four 10G uplinks between two copper ports and two SFP+ slots. The current C1200-48T-4X fits fiber-focused migrations; the discontinued SG250X-48-K9 fits legacy installations that specifically need its built-in 10G copper connections.
United States
