Cisco C9800-40-K9

Overview

The Cisco C9800-40-K9 is a wireless controller designed to provide centralized management for large-scale Wi-Fi 5 networks. It supports up to 2000 access points and 4096 clients, making it suitable for environments with high device density and bandwidth demands. With 10 Gigabit Ethernet uplinks, it ensures fast and reliable connectivity across campus-wide deployments, corporate offices, universities, and hospitality venues.

Security is a core focus, with robust encryption standards like AES, CCM, CCMP, and WPA2 protecting data both over the air and on the wired backbone. The controller’s rack-mount design fits standard 1U equipment racks, simplifying integration into existing network infrastructure.

Key features

• Centralized control for managing thousands of access points and clients, streamlining network administration
• 10 Gigabit Ethernet support to handle high-throughput applications and reduce network bottlenecks
• Comprehensive security with multiple encryption protocols and RADIUS integration for secure authentication
• VLAN support enables easy segmentation of traffic for guests, employees, and IoT devices, enhancing network organization
• Remote management capabilities allow IT teams to deploy configuration changes and firmware updates efficiently from a central dashboard
• Compact 1U rack-mount chassis designed for easy installation in standard network racks
• Compliance with FCC and IEEE standards ensures dependable operation in regulated environments

Key specs

• Maximum access points supported: 2000
• Maximum clients supported: 4096
• Uplink interface: 10 Gigabit Ethernet
• Wi-Fi standards supported: 802.11a/b/g/n/ac Wave 2 (Wi-Fi 5)
• Encryption protocols: AES, CCM, CCMP, WPA2
• Form factor: 1U rack-mount chassis
• Compliance: FCC and IEEE standards

Connectivity and compatibility

This controller integrates seamlessly with existing wired and wireless infrastructure, supporting high-speed 10 GbE uplinks to connect with core switches and routers. Its compatibility with Wi-Fi 5 standards ensures broad support for a wide range of client devices, from laptops and smartphones to IoT sensors. VLAN and RADIUS support facilitate secure and organized network segmentation, making it easier to manage diverse user groups and device types.

Performance and reliability

Built to handle dense wireless environments, the controller maintains consistent performance even as the number of connected devices grows. Its advanced encryption and authentication methods protect sensitive data, while compliance with industry standards guarantees stable operation. The ability to manage thousands of access points and clients without performance degradation makes it a strong choice for organizations with expanding wireless needs.

Ideal uses and environments

The Cisco C9800-40-K9 fits well in large enterprise campuses, healthcare facilities, educational institutions, and retail chains where reliable, scalable Wi-Fi coverage is critical. It supports seamless roaming and consistent policy enforcement across multiple buildings or floors, helping IT teams maintain control over complex wireless networks. Organizations expecting rapid growth in connected devices will benefit from its capacity and flexible management features.

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