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SG500-28P-K9
Cisco SG500-28P-K9 Small Business 500 24-Port Gigabit PoE+ S...
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SG500-28P-K9 is a managed Layer 2+ access switch with 24 Gigabit PoE+ copper ports and four fixed Gigabit uplink connections in a rack-mount 1U chassis. Two uplinks provide shared RJ-45/SFP interfaces, while the other two SFP connections can serve network links or stacking. The Cisco 500 Series supports small-business access networks that need powered endpoints and local VLAN segmentation without a modular uplink purchase. The discontinued SG500-28-K9 provides the corresponding non-PoE configuration, separating otherwise similar legacy choices by endpoint power requirements. For the SG500-28P, built-in voice VLAN handling and Auto Smartports associate attached devices with port settings. Copper and fiber connection options let the uplink medium follow the installed cabling rather than changing the access-port arrangement.
SG500-28P-K9 price for new stock is is available on request. Get immediate quote. SG500-28P-K9 refurb price is $558.48.
Request bulk order quote for SG500-28P-K9 for additional pricing. Browse the full Cisco SG500 Switches series or explore all Cisco products.
72 Gbps switching capacity defines the fabric available for access and uplink traffic, while 41.67 Mpps forwarding describes packet handling with 64-byte frames. 2048 IPv4 static routes support local inter-VLAN forwarding; RIP v2 and VRRP are absent on this model. SG500-28P-K9 uses 256 MB of memory and 32 MB of flash for operating software and configuration storage, with an 8 Mb packet buffer shared across ports. STP, RSTP and MSTP control redundant switching paths, while LACP combines physical connections into link aggregation groups. An address table holding 16384 MAC entries supports endpoint learning across the installation. Eight hardware queues separate traffic priorities, with strict-priority and weighted round-robin scheduling available. RADIUS and TACACS+ provide centralized administrative authentication. The two fans operate without speed control, a consideration when locating the chassis near occupied work areas.
Order SG500-28P-K9 in new sealed or certified refurbished condition, and specify the condition and required accessories on the purchase order. Certified refurbished units are inspected and bench-tested for power-on and POST, every port linking at rated speed, clean boot, PoE output under load on every powered port and optics bay recognition; firmware is verified and configuration wiped to factory default. ORM's new-unit extended warranty is up to three years, certified refurbished coverage is up to one year, and every condition includes 30-day returns, terms apply. PO accepted, Net-30 for government and RMA with advance replacement support enterprise and volume orders across UK, EU, US and MEA.
| Key Specs | Key Spec Values |
|---|---|
Port Configuration | 24 x 1G PoE+ / 4 x 1G uplinks |
PoE Budget | 180W shared |
Stacking | True stacking / 8 members |
Max Power Draw | 227W |
Lifecycle Status | Cisco support ended April 30, 2023 |
Replacement PID | C1300-24P-4X |
When an existing switch group needs another member, the shared control plane lets the installation retain one management IP address. Master and backup roles support stack control, while automatic numbering affects member identity. Record the existing topology and member numbering before specifying the additional unit.
When several branches need the same administrative baseline, configuration files can be edited as text and transferred with Secure Copy. CLI privilege levels 1, 7 and 15 constrain how access roles are assigned. Specify the site addressing, authentication settings and staging baseline before releasing the purchase order.
When replacement hardware needs validation before joining an installation, dual firmware images provide separate image storage for staging. Firmware upgrades can start through the console connection, and eight source ports can mirror traffic to one destination for testing. Specify the required image and test connections before ordering.
10G uplinks to distribution
SG500-28P-K9 provides 1G network uplinks; its 5G setting serves stacking. C1300-24P-4X retains 24 Gigabit access ports and provides four 10G SFP+ uplinks.
Full 30W power across every endpoint
The shared 180W budget cannot supply 24 endpoints at 30W simultaneously. Limit aggregate endpoint allocation rather than treating every PoE+ port as independently provisioned.
Dynamic routing and gateway redundancy
Static IPv4 and IPv6 routing does not provide RIP v2 route learning or VRRP gateway redundancy. SG500-28P-K9 cannot satisfy a requirement for those functions.
Current Cisco service and security maintenance
SG500-28P-K9 passed its final Cisco support date on April 30, 2023, and has security vulnerabilities without firmware fixes. C1300-24P-4X is the current migration endpoint.
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| SG500-28P-K9 |  SG500-52-K9 |  SG500-28P-K9-NA |  SG500-28 |  SG500-52-K9-NA | |
|---|---|---|---|---|---|
| Depth | 257 mm | 257 mm | 257 mm | 257 mm | 257 mm |
| Ethernet Technology | Gigabit Ethernet | Gigabit Ethernet | Gigabit Ethernet | Gigabit Ethernet | Gigabit Ethernet |
| Flash Memory | 32 MB | 32 MB | 32 MB | 32 MB | 32 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 | SG500-28P-K9 | SG500-52-K9 | SG500-28P-K9-NA | SG500-28 | SG500-52-K9-NA |
| Memory | 256 MB | 256 MB | 256 MB | 256 MB | 256 MB |
| Power Consumption | 227W | 47W | 227W | 23.6W | 47W |
| SFP Ports | 2 x 1GbE / 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) | 2 x 1GbE (Combo, shared with RJ-45) / 2 x 1GbE | 2 x 1GbE (Combo, shared with RJ-45) / 2 x 1GbE |
| Switching Capacity | 72 Gbps | 120 Gbps | 72 Gbps | 72 Gbps | 120 Gbps |
| Weight | 3.95 kg | 3.95 kg | 3.95 kg | 3.4 kg | 3.95 kg |
| Width | 440 mm | 440 mm | 440 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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SG500-28P-K9 is the Gigabit 500 Series PoE+ configuration with 28 total connections: 24 copper access ports and four additional Gigabit connections. SG500 identifies the Gigabit switch family, 28 is the total connection count, and P marks PoE+. The complete ordering identifier retains the K9 suffix.
SG500-28P-K9 is managed through HTTP/HTTPS web configuration, Textview CLI over console, SSH or Telnet, and SNMP versions 1, 2c and 3. The built-in interface provides monitoring and maintenance. The Cisco 500 Series also includes FindIT device discovery and Cisco OnPlus integration in its feature set.
SG500-28P-K9 is discontinued: end of sale was April 12, 2018, and Cisco support ended April 30, 2023. A sealed unit does not restart those milestones. Existing installations therefore need independent maintenance and replacement arrangements rather than relying on a new Cisco support entitlement.
ORM Systems offers SG500-28P-K9 new sealed or certified refurbished, with new-unit extended warranty up to three years and refurbished warranty up to one year. Both conditions include 30-day returns, terms apply. Cisco's original limited lifetime hardware warranty no longer provides service; Cisco support ended April 30, 2023.
SG500-28P-K9 provides a shared 180W PoE budget across 24 PoE+ access ports, with an individual port maximum of 30W. The aggregate budget prevents every powered port from delivering its maximum simultaneously. Size the attached-device allocation against the shared budget and configure power priorities before deployment.
SG500-28P-K9 has four fixed Gigabit uplink connections: two shared copper/SFP interfaces and two additional SFP interfaces that also support stacking. Each shared interface uses either copper or fiber, not both simultaneously. MGBLX1 supports a 1G single-mode fiber connection over distances reaching 10 km.
Cisco 500 Series true stacking joins eight members into one managed system. SG500-28P-K9 supports 5G copper stack connections using SFP-H10GB-CU1M, SFP-H10GB-CU3M or SFP-H10GB-CU5M. The cable lengths are 1 m, 3 m and 5 m respectively, so specify the cable PID for each required connection.
SG500-28P-K9 supports static IPv4 and IPv6 routing rather than dynamic routing, making its feature classification Layer 2+. IPv4 capacity reaches 2048 static routes with 256 IP interfaces; IPv6 supports 2048 static routes with 128 interfaces. RIP v2 and VRRP are not available on this model.
SG500-28P-K9 uses an internal universal AC supply accepting 100-240V AC and two fans without fan-speed control. Maximum consumption reaches 227W with PoE at 110V, compared with 35W system consumption without the PoE load at that voltage. The fixed power arrangement does not provide redundant internal supplies.
SG500-28P-K9 powers attached endpoints through PoE+, while SG500-28-K9 is the non-PoE counterpart. Both models are discontinued. For like-for-like maintenance, the powered model matches installations requiring switch-delivered endpoint power; the non-PoE model matches installations whose endpoints already receive power from another source.
SG500-28P-K9 has 24 Gigabit access ports, while SG500-52P-K9 has 48 Gigabit access ports. Both models are discontinued. The smaller configuration matches like-for-like maintenance of lower-density installations, while the larger configuration matches existing installations that need the higher access-port count in a single chassis.
SG500-28P-K9 offers four 1G network uplinks, while C1300-24P-4X provides four 10G SFP+ uplinks. The migration chain ends at C1300-24P-4X. SG500-28P-K9 is a discontinued option for maintaining an existing installation; C1300-24P-4X suits new purchases that require 10G connections toward aggregation.
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