• Cisco Catalyst 9800-40 Wireless Controller with multiple ports and silver finish
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Cisco

Cisco C9800-40-K9 | Catalyst 9800 Wireless Controller, 2000 APs, 40 Gbps

C9800-40-K9

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Description

The Cisco Catalyst 9800-40 Wireless Controller is a 1RU enterprise-grade wireless controller designed for midsize to large campus deployments. Supporting up to 2000 access points and 32,000 clients with 40 Gbps throughput, it delivers high availability with stateful switchover, seamless software upgrades, and advanced security features. Built on Cisco IOS XE, the C9800-40 provides centralized management for Wi-Fi 6 and earlier standards with support for SD-Access, FlexConnect, and centralized deployment modes.

Features

Supports up to 2000 access points and 32,000 concurrent wireless clients
- 40 Gbps sustained wireless traffic throughput with dedicated 30 Gbps crypto processing
- Built on Cisco IOS XE modular operating system for stability and programmability
- 1:1 Stateful Switchover (SSO) for high availability with zero client impact
- In-Service Software Upgrade (ISSU) and hot/cold patching for seamless updates
- Four 10 Gigabit Ethernet SFP+ uplink ports with MACsec encryption and SyncE timing
- Wi-Fi 6 (802.11ax) ready with support for all legacy wireless standards
- Cisco Encrypted Traffic Analytics (ETA) for threat detection without decryption
- SD-Access integration for policy-based segmentation and automated provisioning
- Advanced Wireless Intrusion Prevention System (aWIPS) for threat mitigation
- Centralized, FlexConnect, and Fabric deployment mode support
- NETCONF/YANG APIs and model-driven telemetry for programmability and automation
- RADIUS, TACACS+, 802.1X authentication with WPA2/WPA3 encryption
- Secure Boot, image signing, and hardware authenticity for trustworthy operations
- Bluetooth-ready for wireless management and troubleshooting access
- VLAN tagging, link aggregation (802.1AX), and QoS for optimized traffic handling
- Embedded WebUI for simplified configuration and monitoring without CLI knowledge
- RAID 1 storage resilience and dual redundant power supplies for reliability
- Cisco DNA Center integration for analytics, assurance, and policy orchestration
- Stratum 3E network clocking for precise timing in synchronized networks

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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Technical Specifications

FAQs

Datasheet

Technical Specifications

Access Point Capacity: Up to 2000 access points
- Client Capacity: Up to 32,000 wireless clients
- Throughput: 40 Gbps sustained forwarding throughput
- Interfaces: 4x 10GbE SFP+ ports (MACsec and SyncE capable), 1x Gigabit management port
- Memory: 32 GB DDR3 ECC RAM
- Flash Storage: 32 GB embedded USB flash, SATA hard disk with RAID 1 support
- Management: Console (RJ-45 and mini-USB), WebUI, CLI, NETCONF/YANG APIs, model-driven telemetry
- Security Processor: Up to 30 Gbps crypto and security processing
- High Availability: 1:1 Stateful Switchover (SSO), In-Service Software Upgrade (ISSU)
- Power: Dual redundant power supplies, maximum 762W consumption
- Form Factor: 1RU rackmount, 17.3 x 19.5 x 1.7 inches, 22.8 lbs
- Standards: IEEE 802.11a/b/g/n/ac/ax (Wi-Fi 6), IEEE 802.3, 802.1Q VLAN, 802.1AX Link Aggregation

FAQs

Q: What deployment modes does the Catalyst 9800-40 support?
A: The C9800-40 supports centralized, FlexConnect, and SD-Access deployment modes. It can manage access points in local mode for centralized data forwarding or in FlexConnect mode for distributed forwarding at remote sites. SD-Access integration enables policy-based segmentation and automation through Cisco DNA Center.

Q: What licensing is required for the Catalyst 9800-40?
A: The C9800-40 requires Cisco DNA licensing for wireless features. DNA Essentials provides foundational wireless capabilities, while DNA Advantage adds advanced features like analytics, AI-driven insights, and enhanced security. Licenses are typically sold separately and can be purchased as term-based subscriptions.

Q: Can the C9800-40 manage Wi-Fi 6 access points?
A: Yes, the Catalyst 9800-40 fully supports Wi-Fi 6 (802.11ax) access points including the Catalyst 9100 Series and Aironet 9120 Series. It also supports legacy 802.11a/b/g/n/ac access points, allowing mixed deployments during migration.

Q: How does high availability work on the C9800-40?
A: The C9800-40 supports 1:1 Stateful Switchover (SSO) redundancy when deployed in pairs. This ensures uninterrupted wireless service during controller failures or maintenance, as client sessions and configurations are synchronized between active and standby units. In-Service Software Upgrade (ISSU) enables zero-downtime software updates.

Q: What management and automation capabilities does the C9800-40 offer?
A: The C9800-40 provides comprehensive management through CLI, embedded WebUI, and integration with Cisco DNA Center for centralized orchestration. It supports open APIs via NETCONF/YANG for automation and model-driven telemetry for real-time monitoring. Streaming telemetry provides deep visibility into network and client health.

Datasheet

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