Cisco

Cisco networking tutorials covering IOS and IOS-XE configuration, platform features, and hands-on guides for routing, switching, and security across Cisco hardware and software.
134 posts
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How to Configure WLANs on the Cisco Catalyst 9800

J
Moving from AireOS to the Cisco Catalyst 9800 means learning a profile-and-tag WLAN model that trips up even experienced wireless engineers. A practical guide to WLAN configuration on the C9800 with GUI and CLI examples.
10 min read
Wireless public

C9800 Initial Setup: Step-by-Step Configuration Guide

J
Getting the Cisco Catalyst 9800 initial setup right determines how smoothly every later step works. A step-by-step configuration guide covering IPs, NTP, country code, certs, and AP join readiness on C9800-40, C9800-CL, and embedded.
11 min read
Wireless public

C9800 AP Join Process: Step-by-Step Explained

J
Cisco C9800 APs discover, authenticate, and join controllers through a structured multi-phase process. A step-by-step breakdown of the AP join process, DTLS establishment, and operational state transitions for troubleshooting.
11 min read
Wireless public

C9800 vs. AireOS: What Changed and Why It Matters

J
AireOS ran enterprise wireless for 15 years. The Cisco Catalyst 9800 rebuilds the controller on IOS-XE with a modular architecture and a new configuration model. A side-by-side look at what actually changed and why it matters.
7 min read
Wireless public

C9800 Hardware and Software Architecture Explained

J
The Cisco Catalyst 9800 is a multiprocess, data-model-driven WLC built on IOS-XE. A deep dive into the hardware and software architecture including processes, dataplane, and fault domains for troubleshooting intelligence.
14 min read
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