Cisco AIR-CT3504-K9 Wireless LAN Controller

The Cisco AIR-CT3504-K9 Wireless LAN Controller is an 802.11ac centralized controller designed to manage up to 150 access points and as many as 3,000 clients, making it suitable for mid-size enterprise campuses and distributed wireless environments that require scalable WLAN management. It can be installed as a desktop unit or rack-mountable chassis and provides 4x Gigabit Ethernet ports plus 1x Multigigabit Ethernet uplink, with management options including Web GUI, CLI, Cisco Mobility Express, and Cisco Prime Infrastructure. Security features include WPA2/WPA3, 802.1X, and rogue AP detection, while mobility features cover seamless roaming and RF management to maintain reliable wireless connectivity. It targets offices, schools, hospitals, and retail facilities needing centralized control of wireless access points and secure, policy-driven network access. Common replacements include Cisco C9800-L-C-K9, Cisco AIR-CT5520-K9, and Cisco AIR-CT2504-K9.