Cisco C9800-L-F-K9 | Catalyst 9800-L Wireless Controller, 4x 1G SFP + 2x 10G SFP+

Q: What is the difference between the C9800-L-F-K9 and C9800-L-C-K9 models?
A: The C9800-L-F-K9 features fiber uplinks with 2x 10G SFP+ ports, while the C9800-L-C-K9 provides copper uplinks with 2x 10G/Multigigabit RJ45 ports. Both models include 4x 2.5G/1G copper ports and support the same access point and client capacities. Choose the fiber model for long-distance campus backbone connectivity or the copper model for standard Ethernet infrastructure.

Q: How many access points can the C9800-L-F-K9 manage?
A: The base configuration supports up to 250 access points and 5,000 clients with 5 Gbps throughput. With an optional Performance license upgrade, capacity scales to 500 access points, 10,000 clients, and 10 Gbps throughput without requiring hardware changes.

Q: Does this controller support high availability configurations?
A: Yes, the C9800-L-F-K9 supports N+1 redundancy and Stateful Switchover (SSO) high availability. The dedicated RJ45 redundancy port enables back-to-back or L2 switch connection between paired controllers, maintaining client sessions and AP connectivity during failover events. In-Service Software Upgrade (ISSU) allows seamless updates without downtime.

Q: What wireless access point models are compatible with this controller?
A: The Catalyst 9800-L supports Cisco Aironet and Catalyst Wi-Fi 6 (802.11ax) access points including the 9100, 9120, 9130, and 9136 series, as well as earlier 802.11ac Wave 2 models like the 3800, 2800, and 1800 series. It runs Cisco IOS XE and integrates with Cisco DNA Center for centralized management and policy enforcement.

Q: What licensing model does the C9800-L-F-K9 use?
A: The controller uses Cisco Smart Licensing with DNA Essentials or DNA Advantage tiers. DNA Essentials provides core wireless features, network automation, and cloud monitoring. DNA Advantage adds advanced capabilities like Encrypted Traffic Analytics, SD-Access integration, and AI-driven RF optimization. Specific License Reservation (SLR) is available for air-gapped or high-security deployments.