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WS-C3850-48XS-F-S
Cisco WS-C3850-48XS-F-S Catalyst 3850 48-Port 10 Gigabit Eth...
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WS-C3850-48XS-F-S is a back-to-front-airflow Layer 3 fiber switch with 48 SFP+ connections supporting 1G or 10G and four fixed 40G QSFP+ connections. The full-width 1U chassis includes IP Base and operates as a standalone unit rather than a physical stack member. Cisco Catalyst 3850 fiber configurations aggregate connections from smaller access switches, including branch networks where fiber links connect distributed access equipment. This model provides no PoE output and has no removable uplink-module bay. Discontinued sibling WS-C3850-48XS-S uses front-to-back airflow instead, making airflow direction the distinguishing requirement when matching legacy rack spares. The included routing feature set remains separate from the hardware's fixed port arrangement.
WS-C3850-48XS-F-S price for new stock is $5,011.65, a 90% saving from the Cisco list price of $49,900.00. WS-C3850-48XS-F-S refurb price is $2,203.51. WS-C3850-48XS-F-S is in stock and available for free next-day delivery. (terms applied)
Request bulk order quote for WS-C3850-48XS-F-S for additional pricing. Browse the full Cisco 3850 Catalyst Switches series or explore all Cisco products.
1280 Gbps switching capacity and 909 Mpps forwarding rate provide the throughput reference for the fixed fiber interfaces. IP Base supports Static, RIPv1, RIPv2, RIPng, EIGRP Stub, OSPF for routed access and PBR; full OSPF, EIGRP, BGPv4 and IS-ISv4 require IP Services. The IPv4 scale is 24000 combined ARP and learned-route entries, not a separate allowance for each category. WS-C3850-48XS-F-S carries 8 GB of DRAM and 8 GB of flash for its operating software and stored configuration. Flexible NetFlow supports 96000 flow entries on this hardware configuration, while IP Base limits enabled VLANs to 1000. 288.1W consumption at full traffic provides an electrical-loading reference under the 115V AC test conditions; that figure is distinct from the installed power supply's output rating.
Specify WS-C3850-48XS-F-S in new sealed or certified refurbished condition, with the required quantity and included accessories on the purchase order. Certified refurbished units are inspected and bench-tested, including optics bay recognition and rated-speed port links; firmware is verified and configurations are wiped to factory default. ORM provides up to a 3-year extended warranty for new units, up to 1 year for certified refurbished units, and 30-day returns on every condition, with terms applying; Cisco's separate Enhanced Limited Lifetime Warranty is eligibility-based and bounded by April 30, 2027. Submit the quantity for an enterprise or volume quotation; POs are accepted and Net-30 is available for government.
| Key Specs | Key Spec Values |
|---|---|
Operating System | Cisco IOS XE |
License Tier | IP Base |
Port Configuration | 48 x 1/10G SFP+ / 4 x 40G QSFP+ |
Cooling | 5 fans |
Lifecycle Status | EoS April 30, 2022 / support ends April 30, 2027 |
Replacement PID | C9500-48Y4C |
In a modern spine-leaf data center, the WS-C3850-48XS-F-S Catalyst 3850 48-port 10G Fiber Switch IP Base serves as a leaf-level aggregator for virtualization and storage servers. Its 48 10G SFP+ uplinks deliver consistent low-latency connectivity and non-blocking throughput to hyper-converged clusters. Benefit: Accelerates east-west traffic, simplifies scaling to hundreds of virtual machines, and ensures predictable performance under heavy I/O loads.
As the aggregation layer in an enterprise campus, the Catalyst 3850 48XS-F-S with IP Base enables Cisco SD-Access segmentation across multiple buildings via 10G fiber trunks. Integrated routing, policy-based ACLs and StackWise-480 stacking support create seamless identity-driven access zones for users, IoT devices and guest networks. Benefit: Enforces consistent security policies, reduces broadcast domains, and delivers up to 1 Tbps of aggregated bandwidth for future growth.
In a metropolitan service provider environment, the WS-C3850-48XS-F-S aggregates 10G customer circuits from multiple POPs into a resilient backhaul mesh. IP Base routing features enable MPLS-like VPNs and advanced QoS classification for voice, video and data services. Benefit: Optimizes bandwidth utilization, simplifies multi-tenant traffic isolation and accelerates service activation, driving higher revenue per fiber strand.
When configuration must be completed before network access exists, local console setup does not require a working management address. Catalyst 3850 console defaults use 9600 baud, 8 data bits and 1 stop bit. Specify the console connection and terminal settings before the purchase order.
When spare hardware is held across multiple territories, WS-C3850-48XS-F-S orders can use ORM stock and RMA handling in the UK, EU, US and MEA. RMA with advance replacement is available. Specify the receiving region, spare quantity and required item condition before placing the purchase order.
Physical stacking with existing switches
WS-C3850-48XS-F-S does not support StackWise-480 or StackPower. Adding stacking accessories cannot make this standalone model a member of an existing physical stack.
25G downlinks for fiber aggregation
WS-C3850-48XS-F-S downlinks stop at 10G. Current replacement C9500-48Y4C retains 48 fiber downlinks while supporting 1G, 10G and 25G connections.
BGP with the included license
IP Base does not include BGPv4. That routing requirement needs an IP Services software upgrade rather than the feature set included with this part number.
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| WS-C3850-48XS-F-S |  WS-C3850-12XS-E |  WS-C3850-48T-E |  WS-C3850-48XS-S | |
|---|---|---|---|---|
| Depth | 511 mm | 450 mm | 450 mm | 511 mm |
| Ethernet Technology | 10 Gigabit Ethernet | 10 Gigabit Ethernet | Gigabit Ethernet | 10 Gigabit Ethernet |
| Flash Memory | 8 GB | 4 GB | 2 GB | 8 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-C3850-48XS-F-S | WS-C3850-12XS-E | WS-C3850-48T-E | WS-C3850-48XS-S |
| Memory | 8 GB | 4 GB | 4 GB | 8 GB |
| Power Consumption | 288.1W | 112.7W at 100% traffic with C3850-NM-4-10G | 127.24W (with C3850-NM-4-10G) | 288.1W (100% traffic, ATIS IMIX) |
| Switching Capacity | 1280 Gbps | 320 Gbps | 176 Gbps | 1280 Gbps |
| Weight | 7.45 kg | 5.8 kg | 7.7 kg | 7.45 kg |
| Width | 445 mm | 445 mm | 445 mm | 445 mm |
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New products are backed by up to 3 years of extended warranty, and certified refurbished units by up to 90 days, for dependable protection on every order. The exact term is confirmed on your quote, order confirmation and invoice.
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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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Reviewed on the 2 November 2024
High-density 10G fiber switch delivered excellent throughput.
Reviewed on the 23 February 2019
Handled sustained traffic without issues.
Reviewed on the 21 February 2021
Reliable IP Base features for aggregation layers.
Reviewed on the 13 October 2017
Cisco stability for demanding fiber networks.
Reviewed on the 12 November 2020
Strong option for high-speed enterprise switching.
WS-C3850-48XS-F-S identifies a Catalyst 3850 standalone fiber switch with IP Base. WS-C3850 is the series prefix, 48 is the SFP+ port count, XS denotes SFP+ ports, F selects back-to-front airflow, and the final S selects IP Base. Four QSFP+ ports are also built in.
WS-C3850-48XS-F-S supports a web UI, CLI through local RJ-45 or USB console, remote CLI over SSH or Telnet, and SNMP management. Cisco DNA Center adds centralized management with the appropriate add-on entitlement. Configure the management address and access settings before relying on remote administration.
WS-C3850-48XS-F-S ended sale on April 30, 2022, and Cisco support ends April 30, 2027. C9500-48Y4C is the current replacement. Software maintenance releases ended April 30, 2023; vulnerability and security support continues until April 30, 2027 for eligible customers. These milestones constrain continued Cisco support expectations.
ORM supplies WS-C3850-48XS-F-S new sealed or certified refurbished, with up to a 3-year extended warranty for new units and up to 1 year for refurbished units. Both conditions include 30-day returns; terms apply. Cisco's Enhanced Limited Lifetime Warranty is separate, subject to eligibility, and bounded by April 30, 2027.
No, WS-C3850-48XS-F-S operates with perpetual IP Base without a mandatory Cisco DNA subscription. Optional Cisco DNA Advantage for 10G fiber has a 3-year minimum, with a 5-year term also available. Add-on expiry requires renewal or deactivation and a reload to continue with base-license capabilities.
WS-C3850-48XS-F-S provides 48 fixed SFP+ ports supporting 1G or 10G and four fixed QSFP+ ports supporting 40G. The data interfaces are transceiver-based rather than native RJ-45 access ports. Specify each fiber connection's speed, compatible transceiver and cabling requirements when preparing the hardware order.
No, WS-C3850-48XS-F-S does not support StackWise-480 or StackPower. Stacking support on other Catalyst 3850 configurations does not extend to this standalone variant. A purchase intended to increase an existing physical stack's member count therefore requires different hardware, not a stacking accessory added to this unit.
WS-C3850-48XS-F-S ships with one PWR-C3-750WAC-F, and its second internal power-supply bay allows optional redundancy. Additional PWR-C3-750WAC-F= modules must match the FAN-T3-F= airflow components. Specify the second module explicitly when redundancy is required, instead of assuming that two power supplies are included with the chassis.
WS-C3850-48XS-F-S includes Static, RIPv1, RIPv2, RIPng, EIGRP Stub, OSPF for routed access and PBR under IP Base. Full OSPF, EIGRP, BGPv4 and IS-ISv4 require IP Services. The 24000-entry IPv4 figure combines ARP and learned routes; it is not a separate learned-route allowance.
WS-C3850-48XS-F-S occupies 1U and measures 44.5 mm high, 445 mm wide and 511 mm deep. Its as-shipped weight is 7.45 kg. Allow clearance for the fiber and power connections, and specify C3850-4PT-KIT= if the installation requires four-point mounting rather than the standard mounting arrangement.
WS-C3850-48XS-F-S uses back-to-front airflow, while WS-C3850-48XS-S uses front-to-back airflow. Both models are discontinued and retain the same IP Base feature set and fixed fiber-port arrangement. Rear-intake legacy spare orders require the F variant; front-intake legacy spare orders require the variant without F.
WS-C3850-48XS-F-S includes IP Base, whereas WS-C3850-48XS-F-E includes IP Services. Both models are discontinued. IP Services adds full OSPF, EIGRP, BGPv4 and IS-ISv4 beyond the included IP Base routing functions. IP Base serves routed-access requirements; IP Services serves legacy deployments needing those advanced routing protocols.
C9500-48Y4C supports 48 downlinks at 1G, 10G or 25G, while WS-C3850-48XS-F-S supports 48 at 1G or 10G. C9500-48Y4C is the current replacement for the discontinued model. Keep the older part for matching legacy spares; specify the replacement when the purchase requires native 25G fiber connections.
United States
