Cisco C9800-40-K9 Catalyst 9800-40 Fixed Wireless Controller
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C9800-40-K9 Overview
C9800-40-K9 Fixed-Interface Deployment Profile
C9800-40-K9 is the one-rack-unit Catalyst 9800-40 physical wireless controller for midsize and large deployments. Cisco publishes a maximum of 2,000 access points, 32,000 clients and 40 Gbps throughput. Four front-panel data ports operate at 10G or 1G; there is no 9800-80 modular uplink bay on this PID.
Fixed uplink design
Map client traffic, CAPWAP, in-band management and northbound connectivity across the four supported SFP+/SFP interfaces. Validate the exact Cisco optics and link mode, because 10/100-Mbps operation is not supported on those ports. Keep the separate management and redundancy links out of the production-throughput calculation.
Power and physical installation
The 9800-40 uses AC power and supports an optional redundant hot-swappable AC supply. Cisco specifies a 1RU form factor and maximum power consumption of 381W. The installation record should include rack depth, power-feed diversity, spare-supply status, console access and both redundancy-port media choices.
2,000-AP failure-domain gate
Size the design from real AP inventory, client concurrency, FlexConnect sites, RF/policy tags and traffic rather than using the platform maximum as a target. For 1:1 SSO or N+1 operation, test stateful failover, AP rejoin, client continuity and aggregate traffic with one controller unavailable. A proposal requiring 9800-80 scale or modular high-speed uplinks is not an equivalent 9800-40 deployment.
Subscription and migration record
Each AP joining a Catalyst 9800 requires the appropriate Cisco DNA subscription. Cisco's lifecycle notice names CW9800M as the replacement product for C9800-40-K9, with end of sale on December 31, 2025 and last support on December 31, 2030. Preserve IOS XE compatibility, Smart Account ownership and AP-license evidence, then compare the successor's interfaces and supported release before migration.
Official sources: Cisco Catalyst 9800-40 data sheet and Cisco C9800 lifecycle and migration notice.
C9800-40-K9 Specification
| Exact model / SKU | C9800-40-K9 |
| Orderable product ID | C9800-40-K9 |
| Maximum managed scale | Up to 2,000 access points and 32,000 clients |
| Forwarding ceiling | Up to 40 Gbps |
| Physical format | 1RU fixed-interface wireless controller |
| Data interfaces | Four 10G/1G SFP+/SFP ports; 10/100-Mbps operation is not supported |
| Power architecture | AC supply with optional redundant hot-swappable AC supply; 381W maximum published consumption |
| Deployment modes | Centralized, Cisco FlexConnect and Fabric Wireless (SD-Access), subject to software compatibility |
| Access-point licensing | Each connected AP requires an applicable Cisco DNA software subscription |
| Product timeline | End of sale December 31, 2025; support available through December 31, 2030 under applicable entitlement |
| Named successor | Cisco CW9800M; validate capacity, ports, IOS XE release and migration procedure |
| Source match | C9800-40-K9: exact fixed-controller PID, 2,000-AP/32,000-client scale, 40-Gbps limit, four-port architecture, power and migration facts verified from Cisco official sources |
| Official manufacturer reference | Cisco Catalyst 9800-40 Wireless Controller data sheet |
C9800-40-K9 Warranty
 | Product Quotation |  | Condition and Packaging |
 | Technical Support Enquiry |  | Returns and Replacement |
 | Shipping Arrangements |  | Warranty Terms |
C9800-40-K9 FAQ
What is C9800-40-K9?
Cisco C9800-40-K9 Catalyst 9800-40 Fixed Wireless Controller is a CISCO Wireless Controllers product supplied by YYST Global for enterprise IT procurement and infrastructure projects.
What is the forwarding performance of C9800-40-K9?
For C9800-40-K9, the manufacturer specification lists forwarding ceiling as Up to 40 Gbps.
What interfaces and ports does C9800-40-K9 provide?
For C9800-40-K9, the manufacturer specification lists data interfaces as Four 10G/1G SFP+/SFP ports; 10/100-Mbps operation is not supported.
What are the power requirements for C9800-40-K9?
For C9800-40-K9, the manufacturer specification lists power architecture as AC supply with optional redundant hot-swappable AC supply; 381W maximum published consumption.
Is C9800-40-K9 available from YYST Global?
Contact YYST Global to confirm availability for C9800-40-K9, the required quantity, exact configuration, delivery destination and current lead time before ordering. A product listing does not confirm current inventory.
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