IGNA Online

A practical guide to diagnosing and fixing the most common OSPF adjacency failures on Cisco IOS-XE — MTU mismatches, timer conflicts, authentication errors, duplicate Router IDs, and flapping neighbors — with real show command output and CLI fixes.

Learn exactly how far to air down on sand, rocks, mud, and dirt — plus hands-on reviews of the best portable compressors (ARB Twin, Viair 400P, Smittybilt) and automatic deflator tools to make every trail transition fast and painless.

Cisco’s Embedded Event Manager (EEM) is one of the most underutilized features in IOS-XE. This guide covers six practical EEM applets — from BGP peer monitoring and interface flap detection to nightly config backups and CPU spike capture — with real CLI syntax and Cat9K-specific tips.

Q1 2026 saw 34 DeFi protocols compromised for $169 million. We break down the dominant attack vectors — oracle manipulation, reentrancy, access control failures — the AI-powered exploit tools now threatening smart contracts, and what a proper 2026 security stack looks like for protocol developers, LPs, and researchers.

Most network engineers harden the data plane and forget the control plane — until an SNMP flood drops their OSPF adjacencies. This guide walks through a production-ready CoPP policy for Cisco IOS-XE, with real CLI templates, tuning guidance, and the show commands you need to verify it’s working.

QoS misconfigurations are the number-one cause of jittery voice calls and stuttering video in enterprise networks. This guide walks through a production-ready MQC QoS policy for Cisco IOS and IOS-XE — covering DSCP markings, LLQ, CBWFQ, NBAR2 classification, and the exact show commands you need to verify it’s working.

Stop logging into devices one by one. This hands-on guide covers Netmiko, NAPALM, and Nornir — the Python libraries that let network engineers automate Cisco IOS/IOS-XE tasks, parse show command output, push config changes, and run parallel jobs across hundreds of devices. Real code, real CLI examples, production-ready patterns.

Turn a Raspberry Pi into a powerful, privacy-first smart home hub with Home Assistant. This step-by-step guide covers installation, initial setup, integrations, automations, and pro tips to get your homelab-grade smart home running in an afternoon.

Stop sending sensitive data to the cloud. This complete guide shows you how to run powerful open-source AI models like Mistral and Llama locally using Ollama — with Docker, a web UI, VS Code integration, and GPU acceleration.