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SG550X-48P-K9-UK
Cisco SG550X-48P-K9-UK 550X 48-Port Gigabit PoE+ Switch, 4x1...
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SG550X-48P-K9-UK combines 48 Gigabit PoE+ access ports with fixed 10 Gigabit Ethernet uplinks in a managed, rack-mount 1U switch. This Layer 2+ member of the Cisco 550X Series Stackable Managed Switches connects business endpoints while supporting local inter-VLAN routing. Two dedicated SFP+ uplinks sit alongside two shared 10GBASE-T/SFP+ combo connections, providing copper or fiber connectivity without a removable uplink card. Each combo connection activates only one medium at a time. Selected access ports accommodate higher-draw endpoints: 16 support 60W delivery, subject to the shared power budget. The discontinued SG550X-48-K9-UK omits endpoint power. For business networks carrying telephone traffic, automatic voice VLAN assignment applies voice-specific QoS treatment to connected phones alongside ordinary data connections.
SG550X-48P-K9-UK price is is available on request. Get immediate quote.
Request bulk order quote for SG550X-48P-K9-UK for additional pricing. Browse the full Cisco 550X Series Stackable Managed Switches series or explore all Cisco products.
176 Gbps switching capacity provides nonblocking forwarding across the built-in interfaces. 130.94 Mpps forwarding handles 64-byte packets at the maximum published rate. 382W of shared PoE power requires concurrent endpoint loads to remain within the available allocation. Static routing and RIP v2 handle local route selection, while PBR directs matching traffic toward selected next hops and VRRP provides default-gateway redundancy. SG550X-48P-K9-UK combines 512 MB DRAM, 256 MB flash, and a dynamically shared 3 MB packet buffer for control functions, image storage, and packet queuing. The address table accommodates 16000 MAC entries, while IPv4 routing supports 7168 routes. Support for 4094 active VLANs permits separate broadcast domains across business workgroups. STP, RSTP, MSTP, and LACP provide loop-control and link-aggregation options. Eight hardware queues support traffic scheduling, and access-control policies support 3000 entries. Internal dual-supply redundancy is absent; backup power uses an external redundant power connection. Temperature-controlled fans provide active cooling rather than fanless operation.
ORM Systems offers SG550X-48P-K9-UK new sealed with up to a 3-year extended warranty, or certified refurbished with up to a 1-year warranty; returns are 30 days on every condition, terms apply. Cisco's separate limited lifetime hardware warranty ends no later than July 31, 2027. Certified refurbished units are inspected and bench-tested, with PoE output verified under load on every powered port, firmware verified, and configuration wiped to factory default. Specify condition, quantities, and link components on the purchase order; ORM accepts POs, provides Net-30 for government and RMA with advance replacement, with regional stock and RMA in the UK, EU, US, and MEA for enterprise and volume orders.
| Key Specs | Key Spec Values |
|---|---|
Port Configuration | 48 x 1G PoE+, 4 x 10G uplinks. |
PoE Budget | 382W shared. |
Stacking | Hardware stacking, eight members. |
Replaces | SF550X-48P-K9-UK, end of sale June 18, 2020. |
Lifecycle Status | End of sale July 30, 2022; support ends July 31, 2027. |
Replacement PID | C1300-48P-4X via discontinued CBS350-48P-4X-UK. |
Existing 550X estates containing Fast Ethernet, Gigabit Ethernet, and 10 Gigabit Ethernet members can retain a mixed hardware stack. Hybrid stacking permits SF550X, SG550X, SG550XG, and SX550X members together under one control plane. Confirm member software compatibility and allocate interconnect ports before adding units to the purchase order.
When a branch needs local routing between workgroups, physical ports, LAGs, VLAN interfaces, and loopback interfaces can carry Layer 3 configuration. The switch supports 256 IPv4 interfaces and 1792 IPv6 static routes. Check interface counts, addressing, and destination reachability before specifying the routed configuration on the purchase order.
For a rollout using a common configuration across several locations, text-editable configuration files and secure SCP downloads provide a repeatable staging path. DHCP autoconfiguration supports options 12, 66, 67, 82, 129, and 150. Specify the configuration template, bootstrap service settings, and per-site addressing before releasing the purchase order.
Multigigabit connections at endpoint ports
Native endpoint interfaces stop at Gigabit Ethernet; the higher-speed connections are uplinks. Requirements for faster copper access links cannot be met by the built-in access ports.
Silent fanless operation near users
Active cooling uses three primary fans plus one redundant fan. Placement requiring a fanless chassis cannot use this actively cooled model as a silent desktop switch.
Manufacturer support beyond July 2027
Cisco support ends July 31, 2027. C1300-48P-4X is the current successor for replacement purchases; the intermediate CBS350-48P-4X-UK reached end of sale October 29, 2024.
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| SG550X-48P-K9-UK |  SG550X-24MPP |  SG550XG-8F8T-K9 |  SG550XG-24F-K9 |  SG550X-24P-K9-UK | |
|---|---|---|---|---|---|
| Depth | 350 mm | 450 mm | 350 mm | 350 mm | 350 mm |
| Ethernet Technology | Gigabit Ethernet | Gigabit Ethernet | 10 Gigabit Ethernet | 10 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 | SG550X-48P-K9-UK | SG550X-24MPP | SG550XG-8F8T-K9 | SG550XG-24F-K9 | SG550X-24P-K9-UK |
| Memory | 512 MB | 512 MB | 512 MB | 512 MB | 512 MB |
| Power Consumption | 494.3W | 870.1W | 84.6W | 77.5W | 269.2W |
| Switching Capacity | 176 Gbps | 128 Gbps | 320 Gbps | 480 Gbps | 128 Gbps |
| Weight | 5.82 kg. | 6.19 kg | 5.23 kg | 4.16 kg | 4.72 kg. |
| Width | 440 mm | 440 mm | 440 mm | 440 mm | 440 mm |
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SG550X-48P-K9-UK identifies a 550X Gigabit stackable managed switch with 48 PoE+ access ports and the UK regional ordering suffix. The SG550X segment identifies the Gigabit model group, 48 denotes access-port count, and P identifies powered access. The UK region also covers Saudi Arabia, Qatar, Kuwait, Singapore, Hong Kong, and Malaysia.
SG550X-48P-K9-UK supports HTTP/HTTPS browser management, Textview CLI through RJ-45 console or SSH/Telnet, SNMP versions 1, 2c, and 3, Smart Network Application, FindIT Network Manager with embedded FindIT Network Probe, FindIT Network Discovery Utility, Active Advisor, and Cisco Network Plug and Play provisioning. Simple and advanced browser modes are available.
Yes, SG550X-48P-K9-UK reached end of sale July 30, 2022, and its last date of Cisco support is July 31, 2027. Software maintenance ended July 30, 2023. The immediate replacement, CBS350-48P-4X-UK, is also discontinued; the current migration chain continues to C1300-48P-4X for replacement purchases.
SG550X-48P-K9-UK is available new sealed or certified refurbished. ORM warranties are up to 3 years extended for new units and up to 1 year for refurbished units. Returns are 30 days on every condition; terms apply. Cisco's limited lifetime hardware warranty ends no later than July 31, 2027.
SG550X-48P-K9-UK replaces the discontinued SF550X-48P-K9-UK, whose access ports run at 10/100 Mbps rather than Gigabit Ethernet. The older model reached end of sale June 18, 2020, and Cisco service ended June 30, 2025. Existing installations need their uplink connections and endpoint-power requirements checked before replacing that chassis.
SG550X-48P-K9-UK provides a shared 382W PoE budget across 48 powered access ports, including 16 ports supporting 60W delivery. The other powered access ports support 30W maximum output. Individual port ratings do not mean every port can draw its maximum simultaneously; connected-device demand must remain within the shared budget.
SG550X-48P-K9-UK has four fixed 10G uplinks: two dedicated SFP+ connections and two 10GBASE-T/SFP+ combo connections. Each combo pair activates either copper or fiber, not both simultaneously. Compatible fiber options include SFP-10G-SR for multimode connections and SFP-10G-LR for single-mode connections; specify the required optics separately.
The Cisco 550X Series supports hardware stacks of eight members over standard 10 Gigabit Ethernet connections. Ring and chain topologies are available, and link aggregation can combine interconnects. Compatible copper options include SFP-H10GB-CU1M, SFP-H10GB-CU3M, and SFP-H10GB-CU5M for 1 m, 3 m, and 5 m connections respectively.
Yes, SG550X-48P-K9-UK supports static IPv4 routing, IPv6 static routing, and RIP v2 dynamic routing between configured interfaces. Its IPv4 route capacity is 7168 routes. PBR provides policy-directed next-hop selection, while VRRP supplies default-gateway redundancy. These routing functions accompany the switch's Layer 2+ access-switching capabilities without changing its physical interfaces.
SG550X-48P-K9-UK accepts 100-240V AC and reaches 494.3W worst-case consumption at 110V with PoE, or 483.1W at 220V with PoE. System-only consumption is 76.3W at 110V and 76.9W at 220V. Size upstream power capacity for the powered operating condition rather than treating the endpoint-power budget as total consumption.
SG550X-48P-K9-UK supplies PoE+ to its access ports, while SG550X-48-K9-UK provides data-only Gigabit access. Both models are discontinued, and their uplink configuration is unchanged. The powered model serves existing estates with centrally powered endpoints; the non-PoE model fits legacy positions where connected devices already have separate power supplies.
SG550X-48P-K9-UK has 48 access ports compared with 24 on SG550X-24P-K9-UK. Both are discontinued Gigabit PoE+ models with fixed 10G uplinks. The 48-port model addresses higher connection density in existing deployments; the 24-port variant serves smaller connection counts when maintaining an installed 550X hardware standard rather than expanding endpoint density.
SG550X-48P-K9-UK reached end of sale July 30, 2022; C1300-48P-4X is the current model at the end of its migration chain. The immediate replacement, CBS350-48P-4X-UK, is also discontinued. The older switch serves existing 550X estates; C1300-48P-4X is the successor to specify for a new migration project.
The 48-port Gigabit PoE stackable switch uses a 1U rack-mount chassis measuring 440 mm wide, 44 mm high, and 350 mm deep. The unit weighs 5.82 kg, and a mounting kit is included with the new switch. Allow clearance for cabling and active cooling when confirming rack placement.
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