Cisco C9800‑40‑K9 is a high‑performance wireless LAN controller designed for enterprise networks, offering multi‑gigabit throughput, robust scalability for thousands of APs and clients, advanced security, and rich programmability powered by Cisco IOS XE.
Product Description
The Cisco C9800‑40‑K9 Catalyst Wireless Controller is a powerful, rack‑mountable 1 RU controller built to support large enterprise wireless LAN deployments. It delivers up to 40 Gbps of throughput and scales to 2,000 access points and 32,000 clients, making it ideal for high‑density environments like campuses, hospitals, and large venues.
Model Type: Enterprise‑Grade Wireless LAN Controller
Series: Cisco Catalyst 9800 Series (fixed‑appliance controller)
Key Features
• High Wireless Scale & Throughput — Supports up to 2,000 access points and 32,000 wireless clients, with up to 40 Gbps throughput for high‑density enterprise Wi‑Fi deployments.
• Advanced Wireless Architecture — Built on Cisco IOS XE with intent‑based networking, offering centralized policy control, SD‑Access fabric support, and flexible deployment modes such as Centralized Local, FlexConnect, and Fabric Wireless (SD‑Access).
• Robust Scale for WLAN/VLANs — Supports up to 4,096 WLANs and 4,096 VLANs, enabling extensive segmentation and network design flexibility.
• Enterprise Security & Assurance — Integrates secure boot, trust anchor technologies, WPA3, and Advanced Wireless Intrusion Prevention; works with Cisco DNA Center and ISE for policy, automation, and visibility.
• Flexible Uplink Connectivity — Features 4 × 10 Gbps SFP+ uplink ports plus additional management, console, and redundancy interfaces that simplify integration into wired networks.
• High Availability & Resiliency — Supports nonstop software upgrades (ISSU), stateful switchover (SSO), and redundant power supply options for minimal downtime in critical environments.
• Programmability and Analytics — Cisco IOS XE delivers open APIs (NETCONF/RESTCONF), model‑driven telemetry, DNA Center integrations, and wireless monitoring/assurance tools.
Technical Specs at a Glance
| Specification | Details |
|---|---|
| Maximum Access Points | Up to 2,000 |
| Maximum Clients | Up to 32,000 |
| Throughput | Up to 40 Gbps |
| WLAN/VLAN Support | 4,096 / 4,096 |
| Uplink Interfaces | 4 × 10 Gbps SFP+ |
| Management Interfaces | RJ‑45 management, console, USB ports |
| Operating System | Cisco IOS XE |
| Form Factor | 1 RU rack‑mount |
| Power | AC power with optional redundant hot‑swap PSU |
| Max Power Consumption | ~381 W |
| Dimensions | ~17.3 × 19.5 × 1.72 in (1RU) |
| Weight | ~22.8 lb (10.34 kg) |
Typical Use Cases
• Large Enterprise Campuses — Delivers scalable, centralized wireless control and policy enforcement across distributed buildings or floors.
• High‑Density Wi‑Fi Deployments — Suitable for environments with thousands of APs and tens of thousands of connected clients (e.g., universities, stadiums, convention centers).
• Enterprise Wireless Fabric & SD‑Access — Integrates with Cisco DNA Center for intent‑based networking and unified wired/wireless automation.
• Secure Wireless Infrastructure — Provides advanced wireless security policies and analytics with ISE and Trust Anchor integration.
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