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WS-C3850-24U-S
Cisco WS-C3850-24U-S Catalyst 3850 24-Port Gigabit UPOE Swit...
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WS-C3850-24U-S provides 24 Gigabit Ethernet UPOE access ports in a managed Layer 3, rack-mount 1U chassis. Its modular uplink architecture supports SFP or SFP+ connectivity, with no network module installed in the base configuration. IP Base is the as-shipped software tier, covering routed access alongside enterprise switching functions. The Cisco Catalyst 3850 Series combines wired switching and wireless controller capabilities under Cisco IOS XE. Powered connections accommodate phones, wireless access points, and compatible physical access control devices. The discontinued WS-C3850-24P-S sibling provides PoE+ rather than UPOE. For an existing Catalyst 3850 installation, this variant preserves the family's operational model while selecting UPOE-capable copper connections instead of the lower-power PoE+ configuration.
WS-C3850-24U-S price for new stock is $1,256.85, a 83.9% saving from the Cisco list price of $7,800.00. WS-C3850-24U-S refurb price is $199.50. WS-C3850-24U-S is in stock and available for free next-day delivery. (terms applied)
Request bulk order quote for WS-C3850-24U-S for additional pricing. Browse the full Cisco 3850 Catalyst Switches series or explore all Cisco products.
92 Gbps switching capacity covers the 24-port Gigabit configuration. 800W of shared PoE power must be allocated across connected endpoints rather than treated as unrestricted maximum power on every port. OSPF for routed access, EIGRP Stub, Static, RIPv1, RIPv2, RIPng, and PBR provide the included routing functions; full OSPF, full EIGRP, BGPv4, and IS-ISv4 require IP Services. WS-C3850-24U-S carries 4 GB DRAM and 2 GB flash for software operation and storage. The UADP forwarding silicon supports hardware switching, while the platform accommodates 32000 MAC addresses and 24000 IPv4 entries covering ARP plus learned routes. LACP supports aggregated links, and MSTP provides spanning-tree operation across multiple instances. DHCP snooping and Dynamic ARP Inspection address forged server and address information. The 84.8W consumption figure applies to full-traffic operation without PoE loading when C3850-NM-2-10G is installed, not to combined switch and endpoint consumption.
WS-C3850-24U-S is offered new sealed or certified refurbished with ORM warranty coverage of up to three years extended for new units and up to one year for certified refurbished units, plus 30-day returns on every condition; terms apply. Refurbished units are inspected and bench-tested, including PoE output under load on every powered port, firmware verification, and configuration wiping to factory default. Specify condition, quantity, and required accessories before submitting the PO; Cisco's Enhanced Limited Lifetime Warranty and service ended October 31, 2025. Enterprise and volume orders support PO acceptance, government Net-30, and RMA with advance replacement across UK, EU, US, and MEA.
| Key Specs | Key Spec Values |
|---|---|
Operating System | Cisco IOS XE. |
License Tier | IP Base. |
Port Configuration | 24 x 1G UPOE, modular uplink bay. |
Replaces | WS-C3750X-24U-S; end of sale October 30, 2016. |
Lifecycle Status | Cisco support ended October 31, 2025. |
Replacement PID | C9300-24U-A. |
In a large corporate headquarters, IT teams deploy the Cisco Catalyst 3850 24U-S UPOE IP Base to centrally power and manage 24 VoIP phones and Wi-Fi 6 access points over a single switch. The integrated UPOE delivers up to 60W per port, eliminating local power injectors and reducing rack space. Advanced QoS prioritization and IP Base security features guarantee low-latency, high-reliability voice traffic. Outcome: streamlined operations, up to 30% lower deployment costs, and superior call quality across the enterprise.
Facility managers in commercial real estate integrate environmental sensors, LED lighting controllers, and access control systems onto the WS-C3850-24U-S Catalyst 3850 24-port UPOE IP Base switch. Its high PoE budget supports 24 smart devices with real-time power and data monitoring via Cisco DNA Center. Automated alerts optimize energy use and cut HVAC inefficiencies by up to 25%. Outcome: consolidated cabling, centralized IoT oversight, and measurable energy savings.
A national retail chain equips each store with the Cisco WS-C3850-24U-S switch to power PoE point-of-sale terminals, digital signage, and IP security cameras. Integrated stacking and IP Base Layer 3 capabilities aggregate WAN links and enforce access control lists at the edge. The design delivers secure, low-latency transactions and real-time marketing content updates. Outcome: uniform store performance, simplified branch deployments, and improved customer experience with 99.99% network uptime.
When extending an existing power-sharing installation, distinguish the data stack from its power groups. StackPower connects a maximum of four switches in a power stack and supports power-sharing or redundancy modes. Select the intended mode, map each power group, and confirm matching software feature sets before adding another member to the PO.
When a branch rollout includes unheated staging or elevated installation sites, environmental limits affect acceptance testing. Cold starts require at least 0°C, and normal AC operation permits 45°C at elevations through 1500 meters but 40°C at 3000 meters. Confirm startup conditions, site elevation, and rack ventilation before specifying the shipment.
When replacement hardware must enter an established secure administration workflow, qualify the software image before shipment rather than assuming every image provides identical encrypted access. SSH and cryptographic SNMPv3 require a cryptographic software image. Record the required administration methods and verify image compatibility during staging before releasing the purchase order.
Multigigabit copper connections to endpoints
The fixed copper access ports stop at 1Gbps. Faster uplink interfaces do not increase endpoint connection speeds; a different access switch is required for multigigabit copper endpoints.
Four dedicated 10G fiber uplinks
C3850-NM-2-10G provides two 10G interfaces, while C3850-NM-4-10G is not supported on this hardware. Four dedicated 10G uplinks require a different model.
Continuing Cisco service and security remedies
Cisco service and vulnerability support ended October 31, 2025. C9300-24U-A is the migration replacement, retaining 24 UPOE access ports with Network Advantage rather than IP Base.
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| WS-C3850-24U-S |  WS-C3850-24U-E |  WS-C3850-24P-L |  WS-C3850-48P-L | |
|---|---|---|---|---|
| Depth | 488 mm | 488 mm | 450 mm | 450 mm |
| Ethernet Technology | Gigabit Ethernet | Gigabit Ethernet | Gigabit Ethernet | Gigabit Ethernet |
| Flash Memory | 2 GB | 2 GB | 2 GB | 2 GB |
| Form Factor | Rack-Mount 1U | Rack-Mount 1U | Rack-Mount 1U | Rack-Mount 1U |
| Height | 44.5 mm | 44.5 mm | 44.5 mm | 44.5 mm |
| Manufacturer Part Number | WS-C3850-24U-S | WS-C3850-24U-E | WS-C3850-24P-L | WS-C3850-48P-L |
| Memory | 4 GB | 4 GB | 4 GB | 4 GB |
| Power Consumption | 84.8W without PoE loading using C3850-NM-2-10G | 84.8W (no PoE load / C3850-NM-2-10G installed) | 88.32W (100% traffic / no PoE load / C3850-NM-2-10G installed) | 135.96W (no PoE load; C3850-NM-4-10G installed) |
| Switching Capacity | 92 Gbps | 92 Gbps | 92 Gbps | 176 Gbps |
| Weight | 7.5 kg. | 7.5 kg | 7.4 kg | 7.9 kg |
| Width | 445 mm | 445 mm | 445 mm | 445 mm |
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Reviewed on the 9 April 2021
UPoE ports supported diverse powered devices easily.
Reviewed on the 22 July 2017
Cisco quality with dependable PoE output.
Reviewed on the 9 December 2022
Stable performance in daily operations.
Reviewed on the 26 August 2023
Reliable LAN Base switching with power flexibility.
Reviewed on the 2 August 2023
Good option for access layer deployments.
WS-C3850-24U-S identifies a Catalyst 3850 switch: WS-C3850 denotes the hardware family, 24 denotes the access-port count, U denotes UPOE copper ports, and S denotes IP Base. The configuration includes PWR-C1-1100WAC and a 1U chassis. Uplink connectivity depends on a separately selected compatible network module.
WS-C3850-24U-S supports CLI administration through console access, SSH, or Telnet, plus Cisco Prime Infrastructure and SNMP management. Cisco DNA Center provides additional licensed management functions. SSH and cryptographic SNMPv3 require a cryptographic software image, so image selection must match the administration methods required by the network.
WS-C3850-24U-S provides an 800W shared PoE budget with its supplied PWR-C1-1100WAC and supports Cisco UPOE at 60W per port. Adding another PWR-C1-1100WAC raises available PoE power to 1900W. Full-port 60W operation requires additional supply capacity; the single-supply budget does not cover every port at that maximum.
WS-C3850-24U-S accepts C3850-NM-4-1G and C3850-NM-2-10G; the base configuration includes neither module. C3850-NM-4-1G supplies four Gigabit SFP interfaces. C3850-NM-2-10G supports two 10G SFP+ interfaces alongside two Gigabit interfaces, or four Gigabit interfaces. C3850-NM-4-10G is not compatible with this hardware. Specify the required module separately on the PO.
Catalyst 3850 supports nine switches in a StackWise-480 data stack with 480 Gbps stacking bandwidth. Members operate as one switching system with an active and standby switch. StackPower is separate and connects four switches per power stack. Match software feature sets rather than mixing LAN Base with higher tiers.
WS-C3850-24U-S supports Layer 3 routed access through its IP Base image, including OSPF for routed access, EIGRP Stub, Static, RIPv1, RIPv2, RIPng, and PBR. Full OSPF, full EIGRP, BGPv4, and IS-ISv4 require IP Services. The hardware's 24000 IPv4 entries include ARP plus learned routes, not unrestricted advanced-routing entitlement.
WS-C3850-24U-S includes IP Base; RTU upgrades activate IP Services through C3850-24-S-E or L-C3850-24-S-E. Optional Cisco DNA Essentials and Cisco DNA Advantage add-ons have three-year minimum terms, with five-year options. These term licenses use a Smart Account; expiry requires renewal or deactivation and reload to retain base functionality.
WS-C3850-24U-S is discontinued: end of sale was October 30, 2020, and Cisco support ended October 31, 2025. Software maintenance ended October 30, 2021, while vulnerability support continued through October 31, 2025. C9300-24U-A is the migration replacement for purchases requiring a move away from this discontinued hardware.
WS-C3850-24U-S replaces WS-C3750X-24U-S, the Catalyst 3750-X 24-port UPOE IP Base model whose end-of-sale date was October 30, 2016. This identifies the historical migration relationship, not a currently supported purchasing path. WS-C3850-24U-S is also discontinued, and its subsequent migration replacement is C9300-24U-A.
WS-C3850-24U-S provides UPOE at 60W per port, whereas WS-C3850-24P-S provides PoE+ at 30W per port. Both are discontinued IP Base models. For maintaining existing installations, the UPOE variant addresses higher-power endpoint requirements, while the PoE+ variant corresponds to endpoints within the lower per-port power class.
WS-C3850-24U-S includes IP Base, while WS-C3850-24U-E includes IP Services with advanced routing such as BGPv4 and full EIGRP. Both are discontinued 24-port UPOE models. IP Base corresponds to routed-access requirements; IP Services corresponds to existing installations needing the advanced protocols absent from the IP Base feature set.
WS-C3850-24U-S is a discontinued Catalyst 3850 model with Cisco support ended, whereas C9300-24U-A is its Catalyst 9300 migration replacement. The replacement retains 24 UPOE ports and carries Network Advantage. The older PID addresses exact-hardware continuity; the replacement addresses purchases intended to migrate away from the discontinued generation.
ORM offers WS-C3850-24U-S new sealed with up to three-year extended warranty coverage or certified refurbished with up to one year. Every condition includes 30-day returns; terms apply. Cisco's original Enhanced Limited Lifetime Warranty and Cisco service ended October 31, 2025. Certified refurbished units are inspected and bench-tested.
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