C9800-40-K9 – Modular Wireless Controller – Catalyst 9800-40
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C9800-40-K9 Description
Cisco C9800-40-K9 (Catalyst 9800-40 Wireless LAN Controller) is a fixed 1RU platform designed for midsize and large enterprises, delivering up to 40 Gbps throughput, 2000 access points, and 32,000 clients. Built on Cisco IOS XE and intent-based networking principles, the C9800-40 integrates Cisco RF excellence, Wi-Fi 6 support, and advanced security. It provides seamless software upgrades, high availability with SSO, and open programmability with APIs and model-driven telemetry. Supporting centralized, FlexConnect, and SD-Access deployments, it is the ideal choice for secure, scalable, always-on enterprise wireless.
Quick Specs
|
Parameter |
Specification |
|---|---|
|
Model |
Cisco Catalyst C9800-40-K9 |
|
Max Access Points |
Up to 2000 |
|
Max Clients |
Up to 32,000 |
|
Throughput |
Up to 40 Gbps |
|
Max WLANs |
4096 |
|
Max VLANs |
4096 |
|
Site Tags |
2000 |
|
Policy Tags |
2000 |
|
RF Tags |
2000 |
|
RF Profiles |
4000 |
|
Interfaces |
4×10G / 1×1G SFP+/SFP |
|
Power Supply |
AC PSU with optional redundant AC |
|
Max Power Consumption |
381W |
Key Features
Enterprise-scale performance
Handles up to 2000 access points and 32,000 clients with 40 Gbps throughput, making it ideal for large campuses and enterprise headquarters.
Always-on resiliency
Provides nonstop connectivity with In-Service Software Upgrade (ISSU), hot and cold patching, and 1:1 Stateful Switchover, minimizing downtime during upgrades or failures.
Comprehensive security
Incorporates Secure Boot, Cisco Trust Anchor, WPA3, Encrypted Traffic Analytics, and integrated wireless intrusion prevention to protect devices, users, and data traffic.
Programmability and automation
Cisco IOS XE delivers model-driven telemetry, open APIs (NETCONF/RESTCONF), and YANG models, simplifying automation and integration with Cisco DNA Center.
Advanced visibility and assurance
Features Wi-Fi 6 readiness dashboards, application recognition (NBAR2), and granular QoS policies, helping IT teams optimize performance and user experience.
Flexible deployment models
Supports centralized mode, Cisco FlexConnect for branch offices, and Fabric Wireless (SD-Access), enabling consistent policies across diverse enterprise environments.
Application Scenarios
Deliver high-capacity Wi-Fi with seamless redundancy and advanced policy segmentation.
Provide secure WLAN with trustworthy systems, intrusion prevention, and always-on upgrades.
Ensure stable Wi-Fi for thousands of users across dormitories, hotels, and multi-building sites.
C9800-40-K9 Front View
|
Label |
Component |
|---|---|
|
1 |
PWR: Power LED |
|
2 |
SYS: System LED |
|
3 |
ALM: Alarm LED |
|
4 |
HA: High-availability LED |
|
5 |
CON: RJ-45 compatible console port |
|
6 |
EN: USB console-enabled LED |
|
7 |
CON: Mini USB console port |
|
8 |
USB ports 0 and 1 |
|
9 |
SP: RJ-45 10/100/1000 management Ethernet port |
|
10 |
RP: RJ-45 10/100/1000 redundancy Ethernet port |
|
11 |
RP: 1 GE SFP port (the only SFPs supported on the RP port are GLC-SX-MMD and GLC-LH-SMD) |
|
12 |
LINK: RJ-45 connector LED |
|
13 |
SSD: SSD activity LED |
|
14 |
TE0: 1 GE SFP/10 GE SFP+ port 0 |
|
15 |
TE1: 1 GE SFP/10 GE SFP+ port 1 |
|
16 |
TE2: 1 GE SFP/10 GE SFP+ port 2 |
|
17 |
TE3: 1 GE SFP/10 GE SFP+ port 3 |
C9800-40-K9 Rear View
|
Label |
Component |
|---|---|
|
1 |
Fans |
|
2 |
Optional redundant power supply (PEM 1) |
|
3 |
Power supply (PEM 0) |
|
4 |
Power/standby switch |
Product Comparison
|
Parameter |
C9800-40-K9 | ||
|---|---|---|---|
|
Max APs |
2000 |
250 (500 Perf lic) |
6000 |
|
Max Clients |
32,000 |
5000 (10,000 Perf lic) |
64,000 |
|
Throughput |
40 Gbps |
5–10 Gbps |
80 Gbps |
|
WLANs |
4096 |
4096 |
4096 |
|
VLANs |
4096 |
4096 |
4096 |
|
Interfaces |
4×10G / 1×1G SFP+ |
2×10G SFP+ + 4×2.5G/1G |
8×10G or modular 40/100G |
|
Power |
AC PSU (381W) |
External 110W adapter |
Dual PSU, up to 600W |
|
Form Factor |
1RU rack |
1RU half-width |
2RU rack |
|
HA |
1:1 SSO, N+1 |
SSO, N+1 |
SSO, N+1 |
|
Supported APs |
Aironet 11ac, Catalyst 9100 11ax |
Same |
Same |
Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Model | Cisco Catalyst C9800-40-K9 | Form Factor | 1RU fixed rack-mount wireless LAN controller |
| Operating System | Cisco IOS XE (Catalyst 9800 software) | Deployment Modes | Centralized, FlexConnect, Fabric Wireless (SD-Access) |
| Max Access Points | Up to 2000 | Max Clients | Up to 32,000 |
| Data Plane Throughput | Up to 40 Gbps | WLANs / VLANs | 4096 / 4096 |
| Uplink Interfaces | 4 × 10G SFP+ (backbone/uplink) | Additional Interfaces | 1 × 1G SFP (where applicable) |
| Management | RJ-45 management (out-of-band), WebUI/CLI/NETCONF/RESTCONF/SNMP | Redundancy | 1:1 SSO, N+1 high availability |
| Console | RJ-45 console, Mini-USB console | USB | USB 3.0 (image/logs/tech-support) |
| Programmability | Open APIs, YANG models, model-driven telemetry | Assurance | DNA Center integration, analytics, Wi-Fi 6 readiness insights |
| Security | Secure Boot, image signing, integrity verification, Trust Anchor | WLAN Security | WPA3/WPA2, 802.1X, RADIUS/TACACS |
| Visibility & QoS | NBAR2, Flexible NetFlow, granular QoS policies | Interoperability | Aironet 802.11ac Wave 1/2, Catalyst 9100 (802.11ax) |
| Power Supply | AC PSU (supports optional redundant AC) | Max Power Consumption | Platform maximum per datasheet |
| Dimensions | 1RU; standard 19-inch rack width | Weight | Per official datasheet |
| Environment (Operating) | Typical 0–40°C; humidity non-condensing (datasheet exact) | Compliance | Safety/EMC per regional standards (datasheet list) |
| Licensing | Smart Licensing; Cisco DNA Essentials/Advantage | Software Requirements | Per datasheet recommended IOS XE release |
| High Availability Features | ISSU, hot/cold patching, stateful switchover | Monitoring | Streaming telemetry, syslog, SNMP |
| Use Case Scale | Large campus, hospitals, government, education | Mounting | Rack-mount kit (as ordered) |
| Accessories | Transceivers, DAC/AOC cables, rack-mount brackets | Warranty | Per Cisco hardware warranty terms |
Get More Information
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Customer Reviews
Questions & Answers
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Who is C9800-40-K9 built for?
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How many APs can C9800-40-K9 support?
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What uplink ports does C9800-40-K9 have?
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How is C9800-40-K9 different from C9800-80-K9?
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Does C9800-40-K9 support SSO and N+1 high availability?
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Do C9800-40-K9 APs need Cisco DNA licenses?
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Is C9800-40-K9 end-of-life and moving to CW9800?
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What 1RU rack and 10G uplink details matter for C9800-40-K9?
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