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SX550X-24-K9-NA
Cisco SX550X-24-K9-NA 550X 20-Port 10 Gigabit Ethernet Switc...
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SX550X-24-K9-NA provides managed 10 Gigabit Ethernet switching for copper-connected servers and network storage, with 20 dedicated RJ-45 downlinks and four fixed 10G copper/SFP+ combo uplinks. Each combo connection selects copper or fiber rather than operating both interfaces simultaneously. The Rack-Mount 1U chassis belongs to the Cisco 550X Series Stackable Managed Switches and operates as a Layer 2+ switch with local routing capabilities. Non-PoE operation means endpoint power must be supplied separately. The discontinued SG550X-24P-K9-NA differs by providing powered Gigabit downlinks rather than unpowered 10G copper connections. A dedicated Gigabit out-of-band management interface separates administrative access from production connections. This configuration serves small-business aggregation where existing copper server connections and selected fiber links must coexist without adding a removable uplink card.
SX550X-24-K9-NA price for new stock is $10,202.02. SX550X-24-K9-NA refurb price is $4,594.91. SX550X-24-K9-NA is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for SX550X-24-K9-NA for additional pricing. Browse the full Cisco SX550X Switches series or explore all Cisco products.
480 Gbps switching capacity accommodates traffic across the built-in interfaces, while 240 Mpps forwarding handles 64-byte packets. Static routing and RIP v2 provide local route selection; VRRP supports gateway redundancy, and PBR directs traffic according to policy. SX550X-24-K9-NA uses 512 MB of memory and 256 MB of flash for operation and image storage, with a dynamically shared 3 MB packet buffer. The address table holds 32000 entries, and routing supports 7168 IPv4 routes and 1792 IPv6 static routes. STP, RSTP and MSTP provide loop control, while LACP combines eligible links. Browser configuration, Textview CLI and SNMP provide administrative access, with network-level monitoring available through Smart Network Application and FindIT tools. 124.6W maximum system consumption sets the electrical allowance for the chassis. Four fans and one redundant fan provide active cooling; fan speed adjusts with temperature. Power backup uses an external RPS connection rather than a second internal supply.
ORM Systems supplies SX550X-24-K9-NA new sealed or certified refurbished, with up to a 3-year extended warranty for new units and up to 1 year for certified refurbished units; every condition includes 30-day returns, terms apply. Certified refurbished units are inspected and bench-tested for power-on and POST, rated-speed port links, clean boot, optics bay recognition, PSU status and fan status, with firmware verified and configurations wiped to factory default. Specify condition, required optics and quantity before placing the PO; Cisco's limited lifetime warranty is bounded by July 31, 2027. PO accepted, Net-30 for government and RMA with advance replacement support enterprise and volume orders, with regional stock and RMA across UK, EU, US and MEA.
| Key Specs | Key Spec Values |
|---|---|
Port Configuration | 20 x 10G copper / 4 x 10G copper/SFP+ combo |
Stacking | Hardware stacking / 8 members |
Max Power Draw | 124.6W |
Replaces | SG550XG-24T-K9-NA / End of sale June 18, 2020 |
Lifecycle Status | End of sale July 30, 2022 |
Replacement PID | C1300-24XT |
When consolidating server or storage connections onto existing copper runs, cable qualification becomes part of the hardware purchase. Category 6a supports the switch's 10G connections over distances reaching 100 m. Review installed cable categories, patch-panel paths and required cable lengths before specifying the cabling on the purchase order.
When separate workgroups need local inter-VLAN forwarding, interface planning can determine whether an additional switch belongs on the purchase order. The 550X supports 256 IP interfaces, including interfaces on physical ports, link aggregation groups, VLANs and loopbacks. Count the required interfaces and reserve addressing before specifying the configuration.
When replacement hardware must be staged with a traffic analyzer before installation, port mirroring provides a defined capture arrangement. The 550X can mirror eight source ports to one destination port. Reserve the analyzer connection, identify the source interfaces and specify the required test cabling before the purchase order is released.
PoE-powered phones or access points
SX550X-24-K9-NA supplies no PoE output. C1300-24P-4X provides powered Gigabit access ports and four 10G SFP+ uplinks, but not this model's native 10G copper downlinks.
Fanless operation in occupied rooms
SX550X-24-K9-NA uses four cooling fans plus one redundant fan. A requirement for fanless operation excludes this chassis regardless of the required connection speeds or available port capacity.
Twenty-four copper links plus independent fiber
The four SFP+ interfaces share four copper connections on SX550X-24-K9-NA. Only 24 data connections operate simultaneously; fiber connections do not add four independent ports.
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| SX550X-24-K9-NA |  SX550X-12F-K9-EU |  SX550X-24-K9-UK |  SX550X-24FT-K9-UK |  SX550X-16FT-K9-EU | |
|---|---|---|---|---|---|
| Depth | 350 mm | 257 mm | 350 mm | 350 mm | 257 mm |
| Ethernet Technology | 10 Gigabit Ethernet | 10 Gigabit Ethernet | 10 Gigabit Ethernet | 10 Gigabit Ethernet | 10 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 | SX550X-24-K9-NA | SX550X-12F-K9-EU | SX550X-24-K9-UK | SX550X-24FT-K9-UK | SX550X-16FT-K9-EU |
| Memory | 512 MB | 512 MB | 512 MB | 512 MB | 512 MB |
| Power Consumption | 124.6W | 25.3W | 124.6W | 80.2W | 57.7W |
| Switching Capacity | 480 Gbps | 240 Gbps | 480 Gbps | 480 Gbps | 320 Gbps |
| Weight | 5.16 kg | 3.42 kg | 5.16 kg | 4.84 kg | 3.79 kg |
| Width | 440 mm | 440 mm | 440 mm | 440 mm | 440 mm |
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SX550X-24-K9-NA is the regional order identifier for the SX550X-24 10GBase-T stackable managed switch. SX550X names the model family; 24 identifies its copper-port configuration; K9 remains part of the complete identifier. NA covers the United States, Canada, Mexico, Colombia, Chile and remaining Latin American markets.
SX550X-24-K9-NA supports an HTTP/HTTPS web interface, Textview CLI through the console, SSH or Telnet, and SNMP versions 1, 2c and 3. Network-level tools include Smart Network Application, FindIT Network Manager, the embedded FindIT Network Probe and FindIT Network Discovery Utility. Active Advisor provides additional cloud-service integration.
SX550X-24-K9-NA reached end of sale on July 30, 2022, and its last date of support is July 31, 2027. Software maintenance ended July 30, 2023. The direct replacement CBS350-24XT-NA is also discontinued, with the replacement chain continuing to the current C1300-24XT.
New sealed and certified refurbished SX550X-24-K9-NA units are available from ORM Systems. ORM supplies new units with up to a 3-year extended warranty and certified refurbished units with up to 1 year; every condition has 30-day returns, terms apply. Cisco's limited lifetime hardware warranty is bounded by July 31, 2027.
SX550X-24-K9-NA replaces SG550XG-24T-K9-NA, which reached end of sale on June 18, 2020. That predecessor's Cisco support ended June 30, 2025. SX550X-24-K9-NA is itself discontinued, so an existing installation refresh should distinguish a like-for-like maintenance purchase from migration to the current C1300-24XT.
SX550X-24-K9-NA supports 24 simultaneous data connections: 20 dedicated copper connections and four copper/SFP+ combo connections. Each combo pair activates only one interface, so inserting an SFP+ transceiver does not create an additional connection. The separate Gigabit management interface provides out-of-band administration rather than another access connection.
No, SX550X-24-K9-NA provides data connections without PoE output. Its internal AC supply powers the chassis rather than connected phones, access points or other endpoints. Buyers requiring powered endpoint connections must specify a PoE-capable alternative or separate endpoint power arrangements instead of treating the copper interfaces as powered ports.
Yes, the 550X forms an eight-member hardware stack using standard 10G copper or fiber interfaces in ring or chain arrangements. Supported direct-attach cables include SFP-H10GB-CU1M at 1 m, SFP-H10GB-CU3M at 3 m and SFP-H10GB-CU5M at 5 m. Mixed SF550X, SG550X, SG550XG and SX550X stacks are supported.
The 550X provides static routing, RIP v2, VRRP and PBR, placing this configuration in the Layer 2+ category. IPv4 routing supports 7168 routes, while IPv6 static routing supports 1792 routes. Buyers planning local routing should distinguish those route limits from the separate allowance of 256 IP interfaces.
No, the 550X configuration uses an internal universal AC supply and an external RPS connection rather than two internal redundant supplies. The input range is 100-240V AC, and maximum system consumption is 124.6W. Specify any required external power-backup arrangement separately instead of assuming an additional internal supply ships installed.
SG550X-24P-K9-NA provides 24 Gigabit PoE+ access ports with a 195W shared power budget, whereas SX550X-24-K9-NA provides unpowered 10G copper connections. Both models are discontinued. The former addresses powered Gigabit endpoint requirements in existing installations; the latter addresses copper server and storage connections that require 10G rather than endpoint power.
SX550X-52-K9-NA has 48 dedicated 10G copper downlinks, compared with 20 dedicated copper downlinks on SX550X-24-K9-NA. Both models are discontinued. Existing installations needing more dedicated copper connections distinguish the larger model from the lower-density configuration; port requirements should be settled before selecting replacement hardware for an installed estate.
C1300-24XT is the current successor in the replacement chain, while SX550X-24-K9-NA reached end of sale on July 30, 2022. The intermediate CBS350-24XT-NA is also discontinued. C1300-24XT serves buyers specifying a current replacement; SX550X-24-K9-NA serves maintenance purchases tied to an existing 550X installation and its remaining support boundary.
The 550X supports SFP-10G-SR for 10G multimode connections and SFP-10G-LR for 10G single-mode connections. SFP-10G-SR supports distances from 26 m to 400 m according to the fiber, while SFP-10G-LR supports 10 km. Specify the optics separately and match fiber type, required reach and the remote connection before ordering.
Yes, SX550X-24-K9-NA is a Rack-Mount 1U switch measuring 440 mm wide, 44 mm high and 350 mm deep, with a weight of 5.16 kg. A mounting kit is included. Verify cabinet depth, cable clearance and mounting-kit inclusion when specifying the condition and contents of the order.
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