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SG300-28SFP-K9-NA
Cisco SG300-28SFP-K9-NA 300 28-Port Gigabit SFP Switch, 2x1G...
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SG300-28SFP-K9-NA is a fiber-focused, managed Layer 2+ switch with 26 dedicated Gigabit SFP interfaces and two Gigabit copper/SFP combo interfaces in a 1U rack-mount chassis. Its fixed connections serve small-business fiber distribution rather than a copper endpoint access row, and each combo interface uses either its copper connector or its SFP cage at a time. The Cisco 300 Series supports VLAN-based segmentation for separate departments or services while concentrating optical connections in one rack location. Unlike the discontinued SG300-28PP-K9, which provides PoE+ on 24 copper ports, this model carries data without powering attached devices. The Cisco Small Business family identity matters when matching an existing installation: this is a fixed-configuration Gigabit SFP switch, not a modular chassis or a 10G aggregation model.
SG300-28SFP-K9-NA price for new stock is is available on request. Get immediate quote. SG300-28SFP-K9-NA refurb price is $1,125.81.
Request bulk order quote for SG300-28SFP-K9-NA for additional pricing. Browse the full Cisco 300 Series Managed Switches series or explore all Cisco products.
56 Gbps switching capacity supports nonblocking forwarding across the installed interfaces. 41.67 Mpps forwarding at 64-byte packets defines the packet-processing ceiling for small-frame workloads. Static IPv4 routing supports 512 routes and 128 IP interfaces, so inter-VLAN designs must fit those limits. SG300-28SFP-K9-NA carries 128 MB of CPU memory and 16 MB of flash, with an 8 Mb packet buffer shared dynamically across all ports. STP, RSTP, and MSTP handle loop prevention, while LACP combines links into eight groups with eight active ports per group. Browser configuration uses HTTP or HTTPS; administrators can also work through the CLI or SNMP versions 1, 2c, and 3. Four hardware queues support strict-priority or weighted round-robin scheduling for traffic prioritization. The system uses a single internal AC power source without a redundant supply option, so rack power planning must account for that single input.
SG300-28SFP-K9-NA is offered new sealed with up to a 3-year extended warranty or certified refurbished with up to 1 year. Certified refurbished units are inspected and bench-tested for power-on and POST, rated-speed port links, optics bay recognition, PSU and fan status, and clean boot; firmware is verified and configurations wiped to factory default. Specify condition and accessories on the purchase order; returns cover 30 days on every condition, terms apply, while Cisco's former limited lifetime hardware warranty ended October 31, 2023. For enterprise and volume orders, ORM Systems accepts POs, offers Net-30 for government and RMA with advance replacement, and maintains regional stock/RMA coverage across UK, EU, US, and MEA.
| Key Specs | Key Spec Values |
|---|---|
Port Configuration | 26 x 1G SFP / 2 x 1G combo |
Max Power Draw | 28.2W |
Cooling | 2 fans |
Lifecycle Status | Cisco support ended October 31, 2023 |
Replacement PID | No current direct successor |
When consolidating multicast video feeds, IGMP versions 1, 2, and 3 snooping limits delivery to requesting receivers. The switch supports 1K multicast groups and can act as an IGMP querier. Check group counts, receiver behavior, and querier placement before specifying the distribution switch and its required connections.
When multiple sites need the same baseline, text-editable configuration files and SCP downloads support preparing a common configuration. CLI privilege levels 1, 7, and 15 allow distinct access profiles during staging. Specify the configuration baseline, administrator roles, and file-transfer method before the purchase order is approved.
When a replacement must be tested before installation, two firmware images and two configuration files allow separate software and configuration choices to be retained. Define the intended boot image, startup configuration, and restart acceptance criteria before ordering a laboratory unit or a deployment spare for the installation.
10G fiber uplinks
SG300-28SFP-K9-NA provides Gigabit SFP connectivity only, without a 10G uplink interface. Requirements above 1G per link need different hardware rather than a transceiver upgrade.
PoE-powered phones or access points
SG300-28SFP-K9-NA supplies no PoE on its copper combo interfaces. Phones and access points need separate power; this model cannot provide power to attached endpoints.
Active Cisco hardware support
SG300-28SFP-K9-NA reached its last date of support October 31, 2023. Cisco service has ended, and its direct replacement chain ends without a current successor.
Mon–Fri: [09:00-16:00]
Avg. response under 30 mins
| SG300-28SFP-K9-NA |  SF300-48PP |  SRW2008P-K9-UK |  SRW2048-K9-NA |  SG300-28PP-K9-NA | |
|---|---|---|---|---|---|
| Depth | 257 mm | 10.0 inches | 170 mm | 257 mm | 257 mm |
| Ethernet Technology | Gigabit Ethernet | 10/100 | Gigabit Ethernet | Gigabit Ethernet | Gigabit Ethernet |
| Flash Memory | 16 MB | 32 MB | 16 MB | 16 MB | 16 MB |
| Form Factor | Rack-Mount 1U | Rack-mount | Desktop | Rack-Mount 1U | Rack-Mount 1U |
| Height | 44.45 mm | 1.73 inches | 44.45 mm | 44.45 mm | 44.45 mm |
| Manufacturer Part Number | SG300-28SFP-K9-NA | SF300-48PP | SRW2008P-K9-UK | SRW2048-K9-NA | SG300-28PP-K9-NA |
| Memory | 128 MB | 64 MB | 128 MB | 128 MB | 128 MB |
| SFP Ports | 26 x 1GbE / 2 x 1GbE (Combo, shared with RJ-45) | Combo | 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 | 64 Gbps | 20 Gbps | 104 Gbps | 56 Gbps |
| Width | 440 mm | 17.5 inches | 279.4 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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SG300-28SFP-K9-NA identifies a Cisco 300 Series 28-port Gigabit managed SFP switch. SG300 identifies the Gigabit managed family, 28 denotes active network ports, and SFP denotes the fiber configuration. K9-NA completes the exact ordering identifier; the hardware has 26 dedicated SFP ports and two copper/SFP combo ports.
SG300-28SFP-K9-NA supports a web UI over HTTP/HTTPS, full or menu-based CLI access through the console, SSH or Telnet, and SNMP versions 1, 2c and 3. Legacy integrations include Cisco Small Business FindIT Network and Cisco OnPlus. Use HTTPS, SSH or SNMPv3 when encrypted administration is required.
SG300-28SFP-K9-NA is discontinued: Cisco sales ended October 4, 2018, software maintenance ended October 4, 2019, and all Cisco service ended October 31, 2023. A new sealed unit does not restart those milestones. Continued operation and spare purchases must be planned without ongoing Cisco support.
ORM Systems offers SG300-28SFP-K9-NA new sealed with up to a 3-year extended warranty or certified refurbished with up to 1 year. Returns cover 30 days on every condition; terms apply. Cisco's original limited lifetime hardware warranty ended with Cisco service on October 31, 2023.
SG300-28SFP-K9-NA supports 28 active network connections through 26 dedicated Gigabit SFP ports and two Gigabit copper/SFP combo ports. Each combo port permits either copper or SFP operation, not both simultaneously. Using both copper connectors therefore leaves 26 dedicated fiber connections, rather than adding two connections beyond the stated total.
The Cisco 300 Series 28-port SFP switch supports MGBLX1 for Gigabit single-mode fiber links within 10 km and MGBLH1 for Gigabit single-mode links within 40 km. Each optical connection needs compatible transceivers with matching fiber and link characteristics. Specify the transceiver PID and quantity separately from the switch chassis.
Yes, SG300-28SFP-K9-NA supports static IPv4 routing with 512 static routes and 128 IP interfaces, including VLAN interfaces. These capabilities support inter-VLAN forwarding without making the switch a dynamic-routing system. Confirm the required interface count and static routing plan before selecting the unit for an existing routed network.
No, SG300-28SFP-K9-NA operates as an individual managed switch rather than a hardware stack member. Link aggregation combines network links, not switch control planes, and single-IP management does not create a hardware stack. Treat each chassis separately when specifying configuration, spare quantities, and acceptance tests for the order.
SG300-28SFP-K9-NA uses an internal universal AC supply accepting 100-240V at 50-60 Hz, without a redundant internal supply option. Maximum consumption is 28.2W at 220V, compared with 28W at 110V. Include the chassis load in rack power planning and confirm the required regional power connection when ordering.
SG300-28SFP-K9-NA has no PoE output, while discontinued SG300-28PP-K9 powers 24 copper ports with PoE+ from a shared 180W budget. Their endpoint connections are materially different: dedicated fiber interfaces versus predominantly copper interfaces. For legacy replacements, the SFP model serves optical distribution, while the PoE+ model serves powered copper endpoints.
SG300-28SFP-K9-NA has an internal AC supply, whereas discontinued SG300-10SFP-K9 uses an external AC adapter. The smaller model also has eight dedicated SFP ports plus two combo ports instead of 26 dedicated SFP ports plus two combo ports. Legacy rack replacements and compact fiber installations therefore require different power arrangements and chassis sizes.
SG300-28SFP-K9-NA provides 28 active Gigabit ports centered on SFP connectivity, whereas discontinued SRW2048-K9, also named SG300-52, provides 52 active Gigabit ports centered on copper. SRW2048-K9 has 50 dedicated copper ports and two combo ports. The fiber model serves legacy optical distribution; the higher-density copper model serves larger legacy copper connection requirements.
SG300-28SFP-K9-NA has no current direct successor. Its immediate replacement, discontinued SG350-28SFP-K9-NA, was followed by discontinued CBS350-24S-4G-NA, whose migration chain ends without a replacement product. A new project therefore needs fresh requirements for fiber count, link speed, routing, power, and management rather than an automatic one-for-one substitution.
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