C9800-40-K9 – Cisco Catalyst 9800-40 Wireless Controller

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C9800-40-K9

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List Price: $47489 $11498.86
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Condition New Factory Sealed Related Quantity
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Shipping Express Shipping 2-6 Days, via DHL, FedEx, UPS, etc. Packaging weight and dimensions included:
Weight 14.1 kg
Dimensions 56 × 63 × 20 cm
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C9800-40-K9 Description

C9800-40-K9
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.

Applications Scenarios

Large enterprise campuses

Deliver high-capacity Wi-Fi with seamless redundancy and advanced policy segmentation.

Healthcare and government

Provide secure WLAN with trustworthy systems, intrusion prevention, and always-on upgrades.

Education and hospitality

Ensure stable Wi-Fi for thousands of users across dormitories, hotels, and multi-building sites.

C9800-40-K9 Front View

C9800-40-K9

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

C9800-40-K9

Product Comparison

Parameter

C9800-40-K9

C9800-L-F-K9

C9800-80-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

Discover unbeatable prices and fast shipping for the C9800-40-K9 Access the detailed C9800-40-K9 datasheet and ensure you’re getting the best deal with our reliable delivery service. Need assistance? Our free live chat support is here to help. For more information about the product and pricing, contact us via Live chat or email us at [email protected]

Quality Certifications

Customer Reviews

Write A Review
5.0
(3 reviews)
5 Stars
3
4 Stars
0
3 Stars
0
2 Stars
0
1 Stars
0
    Procurement
    Posted on 02/09/2024
    Verified Buyer
    5.0

    Vendor assisted with Smart Licensing transfer. Smooth process.

    Kylo Ren
    Posted on 12/06/2024
    Verified Buyer
    5.0

    More… MORE bandwidth! This device delivers.

    Enterprise Mobility
    Posted on 10/02/2024
    Verified Buyer
    5.0

    The 40 series is the sweet spot for our HQ. 40Gbps throughput is plenty.

Questions & Answers

  • What is the Cisco C9800-40-K9 best suited for?

    Medium-to-large campuses needing robust wireless with fewer APs than the C9800-80. It balances performance, redundancy, and cost while retaining full IOS XE and DNA Center integration.

  • Does it support HA with stateful failover?

    Yes. Pair two C9800-40 controllers for SSO, preserving client sessions during failovers and upgrades where supported.

  • Is Wi-Fi 6/6E supported?

    Yes, with compatible APs and software. Validate client readiness and spectrum plans, especially for 6 GHz.

  • How does it integrate with SD-Access?

    Use fabric-enabled wireless and policy-based segmentation with scalable group tags across the enterprise.

  • What security/onboarding options exist?

    WPA3, 802.1X, guest portals, and profiling via ISE. Certificates and strong ciphers protect management and control planes.

  • How to monitor client experience?

    Assurance KPIs, DHCP/DNS failure tracking, and roaming analytics pinpoint issues quickly.

  • Any QoS features for collaboration?

    App-aware policies prioritize voice and video roaming performance.

  • Migration from 5520/8540?

    Stage AP moves, validate code, and run pilots before cutover.

  • Licensing considerations?

    Align AP count and features with smart licenses to avoid capacity surprises.

  • Hardening tips?

    Use RBAC, AAA, encrypted management, and isolate controller management interfaces.

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Resources Downloads

  • C9800-40-K9 Datasheet

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