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SG350-28SFP-K9-NA
Cisco SG350-28SFP-K9-NA 350 24-Port Gigabit SFP Switch, 4x1G...
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SG350-28SFP-K9-NA is a fiber-focused managed Layer 2+ switch with 24 Gigabit SFP access ports and four fixed Gigabit uplinks, including two copper/SFP combo connections. The non-PoE configuration concentrates optical connections in a 1U rack chassis for small-business networks. Within the Cisco 350 Series, this model prioritizes fiber access rather than a dense bank of copper endpoint ports. SG350-28P-K9-NA, also discontinued, instead provides 24 copper PoE+ access ports. Access control lists, port security and traffic prioritization support segmented business networks on the same chassis. The Cisco Small Business configuration provides local administration and network monitoring without a removable uplink card.
SG350-28SFP-K9-NA price for new stock is is available on request. Get immediate quote. SG350-28SFP-K9-NA refurb price is $929.46.
Request bulk order quote for SG350-28SFP-K9-NA for additional pricing. Browse the full Cisco 350 Series Managed Switches series or explore all Cisco products.
56 Gbps switching capacity supports nonblocking traffic across the available connections. 41.66 Mpps forwarding handles 64-byte packets at wire speed, while static IPv4 routing and PBR provide configured next-hop forwarding and policy-directed paths between networks. The 990-route ceiling bounds the static IPv4 configuration rather than a dynamic routing database. SG350-28SFP-K9-NA carries 512 MB of DRAM and 256 MB of flash for software operation and image storage. A shared 1.5 MB packet buffer serves traffic across the ports. STP/RSTP/MSTP manage Layer 2 loops, while LACP combines parallel links to compatible peers. Browser-based configuration and a scriptable CLI cover interactive and automated changes; SSH provides encrypted remote administration. Hardware stacking is not supported. 34.3W maximum draw sets the chassis allowance for AC planning, with an internal universal supply accepting the mains feed. A single fan provides active cooling rather than fanless operation.
Order SG350-28SFP-K9-NA new sealed or certified refurbished, specifying quantities and required optics on the PO. Certified refurbished units are inspected and bench-tested, including optics bay recognition; firmware is verified and configurations are wiped to factory default. ORM provides up to a 3-year extended warranty on new units and up to 1 year on certified refurbished units, with 30-day returns on every condition, terms apply; Cisco's separate limited lifetime hardware warranty ends July 31, 2027, subject to its terms. Enterprise and volume orders accept POs, with Net-30 for government, RMA with advance replacement, and regional stock/RMA in the UK, EU, US and MEA.
| Key Specs | Key Spec Values |
|---|---|
Port Configuration | 24 x 1G SFP / 4 x 1G uplinks (2 combo) |
Max Power Draw | 34.3W |
Cooling | 1 fan |
Replaces | SG300-28SFP-K9-NA / End of sale October 4, 2018 |
Lifecycle Status | End of sale July 30, 2022 |
Replacement PID | Discontinued CBS350-24S-4G-NA / No current direct successor |
When several branches need the same starting configuration, DHCP-based autoconfiguration supports address, hostname and configuration-file workflows through options 12, 66, 67, 82, 129 and 150. Define the provisioning server and validate the intended configuration file before adding rollout quantities and configuration work to the purchase order.
When replacement units must be prepared before shipment, dual firmware images support separate software images, while the front-panel USB connection handles configuration and image transfer. Establish the required firmware and saved configuration during staging, then specify the preparation requirements alongside the hardware quantities on the purchase order.
When departmental gateways are being consolidated, the switch supports 128 IP interfaces across physical ports, LAGs, VLAN interfaces and loopback interfaces. Count the planned interfaces before selecting quantities, and verify that the gateway design fits that ceiling before including the configuration work on the purchase order.
10G fiber uplinks
SG350-28SFP-K9-NA fiber interfaces operate at 1G. Faster SFP+ connections and removable uplink cards are not supported, so changing optics cannot provide a 10G connection.
Endpoint power over Ethernet
SG350-28SFP-K9-NA is non-PoE and supplies no endpoint power through its copper connectors. Phones and wireless access points require a separate power source.
Hardware stacking under one control plane
SG350-28SFP-K9-NA does not support hardware stacking. Smart Network Application can manage multiple switches, but that management scope does not create a shared forwarding or control plane.
New software maintenance releases
SG350-28SFP-K9-NA passed its software-maintenance end date on July 30, 2023. Remaining hardware-service eligibility does not provide continuing software maintenance or bug-fix development.
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| SG350-28SFP-K9-NA |  SG350-10MP-K9 |  SG350-10-K9 |  SG350-10P |  SG350-52MP-K9 | |
|---|---|---|---|---|---|
| Depth | 203 mm | 170 mm | 170 mm | 170 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 | Desktop | Desktop | Desktop | Rack-Mount 1U |
| Height | 44 mm | 44 mm | 44 mm | 44 mm | 44 mm |
| Manufacturer Part Number | SG350-28SFP-K9-NA | SG350-10MP-K9 | SG350-10-K9 | SG350-10P | SG350-52MP-K9 |
| Memory | 512 MB | 512 MB | 512 MB | 512 MB | 512 MB |
| Power Consumption | 34.3W | 152.8W | 9.8W | 84.7W | 858W |
| SFP Ports | 24 x 1GbE access / 2 x 1GbE uplink / 2 x 1GbE (Combo, shared with RJ-45) | 2 x 1GbE (Combo, shared with RJ-45) | 2 x 1GbE (Combo, shared with RJ-45) | 2 x 1GbE (Combo, shared with RJ-45) | 2 x 1GbE / 2 x 1GbE (Combo, shared with RJ-45) |
| Switching Capacity | 56 Gbps | 20 Gbps | 20 Gbps | 20 Gbps | 104 Gbps |
| Weight | 2.7 kg | 1.19 kg | 1.09 kg | 1.19 kg | 3.83 kg |
| Width | 440 mm | 280 mm | 280 mm | 280 mm | 440 mm |
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SG350-28SFP-K9-NA identifies a Cisco 350 Series 28-port Gigabit managed SFP switch. SG350 names the managed Gigabit model family, 28 gives the total connection count, and SFP identifies the fiber-focused configuration. NA selects the regional form covering the United States, Canada, Mexico, Colombia, Chile and the rest of Latin America.
SG350-28SFP-K9-NA supports an HTTP/HTTPS web interface, console and SSH/Telnet CLI access, SNMP v1/v2c/v3, Smart Network Application, Cisco FindIT Network Manager with an embedded Probe, and Cisco Active Advisor. Full and menu-based CLI modes are available. Cisco Network Plug and Play supports provisioning, while USB handles local configuration and image transfers.
SG350-28SFP-K9-NA supports MGBSX1 for multimode fiber and MGBLX1 for single-mode fiber. MGBSX1 supports Gigabit links to 500 m, while MGBLX1 supports Gigabit links to 10 km. Transceiver selection must match the installed fiber and the link partner; those distance limits do not change the switch interface speed.
The SG350-28SFP provides 28 independent Gigabit connections: 24 access SFP slots, two additional dedicated SFP slots and two copper/SFP combo connections. Each combo connection permits only one medium to operate at a time. Using its copper connector therefore does not create an additional connection alongside the associated SFP slot.
Yes, SG350-28SFP-K9-NA supports static routing between networks and PBR for policy-directed next hops. The IPv4 configuration supports 990 static routes and 128 IP interfaces. Routed interfaces can use physical ports, LAGs, VLAN interfaces or loopback interfaces; this is a static-routing configuration rather than a dynamic-routing feature set.
No, SG350-28SFP-K9-NA has a single internal AC power supply rather than redundant PSU modules. The input accepts 100-240V AC at 50-60 Hz. Worst-case consumption is 32W at 110V and 34.3W at 220V; the installation needs an AC feed appropriate to the local mains voltage.
No, Cisco 350 Series switches do not form a hardware stack with a shared stack backplane. Smart Network Application can discover topology, monitor links and apply configurations across multiple switches, but centralized management is not hardware stacking. Each SG350-28SFP remains an independently operating switch rather than a stack member.
Yes, SG350-28SFP-K9-NA reached end of sale on July 30, 2022. Software maintenance ended July 30, 2023, and the last date of support is July 31, 2027. These milestones distinguish remaining hardware-service eligibility from ongoing software maintenance; continued use does not restart or extend those dates.
SG350-28SFP-K9-NA replaces SG300-28SFP-K9-NA, which reached end of sale on October 4, 2018, and final support on October 31, 2023. Both generations are discontinued. The replacement relationship identifies the later fiber-focused model, but does not establish configuration-file interchangeability or remove the need to verify existing optics.
SG350-28SFP-K9-NA has non-PoE fiber access, whereas SG350-28P-K9-NA provides 24 copper PoE+ access ports with a shared 195W power budget. Both models are discontinued. For legacy replacement requirements, the SFP model fits optical connections; the PoE+ model fits copper endpoints requiring switch-supplied power within its budget.
SG350-28SFP-K9-NA uses an internal AC supply, while SG350-10SFP-K9-NA uses an external AC adapter. The smaller model also reduces dedicated fiber access from 24 SFP slots to eight. Both are discontinued: the larger model fits rack-based fiber concentration, while the smaller model fits lower-density installations accepting an external adapter.
SG350-28SFP-K9-NA has four Gigabit uplink connections, whereas SG350-8PD-K9-NA has two Multigigabit/SFP+ combo uplinks. Both models are discontinued and serve different legacy layouts. The SFP model concentrates Gigabit fiber access; the smaller multigigabit model fits copper endpoint configurations where its different uplink architecture is required.
CBS350-24S-4G-NA replaced SG350-28SFP-K9-NA, but that replacement is also discontinued. Its end-of-sale date was May 30, 2024, with final support scheduled for May 31, 2029. There is no current direct migration product for that replacement, so the lifecycle chain does not end at an orderable current-generation equivalent.
The SG350-28SFP occupies 1U and measures 440 mm wide, 44 mm high and 203 mm deep, with a weight of 2.7 kg. Operating temperature is 0°C to 50°C. A single fan provides active cooling, so installation planning must accommodate ventilation rather than treating the chassis as fanless.
ORM offers SG350-28SFP-K9-NA new sealed or certified refurbished, with up to a 3-year extended warranty on new units and up to 1 year on refurbished units. Returns are 30 days for every condition, terms apply. Cisco's separate limited lifetime hardware warranty ends July 31, 2027, subject to its terms.
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