250 AP Campus Branch Deployment Cisco WLAN Controller 5 Gbps Fiber Uplink

Cisco Catalyst 9800-L Fiber Uplink Cisco WLAN Controller

The Cisco Catalyst 9800-L (C9800-L-F-K9) is a fixed, enterprise-class Cisco WLAN Controller built for organisations that need dependable wireless coverage without the cost and depth of a modular chassis. As a fibre uplink Cisco WLAN Controller, the unit ships with two 10G/Multigigabit SFP+ uplinks, so a site can trunk hundreds of access points over optical cabling while keeping latency low and cable runs long. Each unit manages up to 250 APs and 5,000 concurrent clients at an aggregate throughput of 5 Gbps, enough headroom for high-density offices, meeting floors, warehouses and education buildings.

Because the platform runs Cisco IOS-XE and joins the Catalyst 9800 policy model, the SSIDs, RF profiles and security rules already tuned at the core can be extended to a small site in minutes. Many campus branch deployment projects also use this controller as the wireless gateway for SD-Branch, with direct forwarding, guest isolation and application visibility enabled from day one.

Technical Specifications

Where This Controller Fits

• Campus branch deployment — a half-width 1RU footprint that fits a small comms cabinet while serving a whole floor or satellite building with up to 250 APs.
• Optical uplink aggregation — the fiber uplink SFP+ ports concentrate traffic from distributed ceilings and IDF rooms back to the core switch without copper distance limits.
• High-density venues — 5,000 clients in parallel keep lecture halls, open offices and warehouses responsive during peak hours.
• Consistent policy with the core — the same Catalyst 9800 configuration templates, RF profiles and guest portals run on this unit, so a new site does not need a second management model.
• Segmented access — 4,096 WLANs and 4,096 VLANs allow separate employee, guest, IoT and voice networks on a single controller.
• Service continuity — seamless software updates let the controller move to a new image without dropping associated access points during maintenance windows.

Questions Buyers Ask

Q: How many access points can the device manage?
The C9800-L-F-K9 supports up to 250 access points and 5,000 clients. That sizing suits a mid-size building or several small branches aggregated on one controller.

Q: Why choose the fiber uplink version instead of the copper model?
The optical variant uses 2 x 10G SFP+ ports for optical runs between the IDF and the core, which avoids the 100 m copper limit and isolates the wireless path from electrical noise. Sites with existing fiber patching usually prefer it.

Q: What does the 5 Gbps throughput figure cover?
It is the aggregate data plane capacity of the controller across all associated access points, not a per-port limit, so it is the number to compare when planning client density.

Q: Is it suitable for a new branch site alongside existing 9800 hardware?
Yes. The unit shares the Catalyst 9800 software train, so it can be onboarded with the same templates and Cisco DNA Center workflow already used at the head office.

Q: Do software upgrades interrupt wireless service?
Seamless software updates allow image changes without access point downtime, which is why many teams schedule maintenance during business hours.

Q: What is verified before the unit is shipped?
Our engineers power up each controller, confirm both SFP+ uplinks negotiate, record the installed IOS-XE version, check the Cisco serial number and export a short test log. Units carry a one-year replacement warranty and pre-shipment photos are available on request.

Tell us your target AP count, uplink patching and preferred IOS-XE release, and we will confirm compatibility for your campus branch deployment before the order is packed.