OSPF Authentication Explained | OSPFv2 MD5 & OSPFv3 IPsec Configuration

👍 Support the channel with Super Thanks 🌐 Visit https://www.telecomtech.io for blog posts, networking tips, and to sign up for the newsletter. 📚 Full networking courses, labs, quizzes, PDFs, and more! 🟥 SUBSCRIBE: https://shorturl.at/TTJxx Unlock the power of securing your OSPF networks! 🔐 In this video, I simply explain OSPF authentication for both OSPFv2 and OSPFv3. You’ll learn why authentication is critical, how it prevents malicious routers from injecting false routing information, and step-by-step how to configure authentication. We’ll cover: 1) OSPFv2 authentication using plain text and MD5 2) OSPFv3 authentication using IPv6/IPsec with SHA1 3) Router and interface-level configuration commands 4) Verification with real Cisco CLI outputs By the end, you’ll know exactly how to secure your OSPF routing domain with proper authentication. Perfect for network engineers, CCNA/CCNP students, and anyone looking to strengthen their networking fundamentals. ☑️ Chapter list: ============================================ 00:00 Introduction 00:17 The need for authentication 00:55 OSPF Authentication Explained 01:20 Authentication in OSPFv2 and v3ll 02:08 OSPFv2 Authentication 04:19 OSPFv2 Authentication Config Verification 04:57 OSPFv3 Authentication 08:04 OSPFv3 Authentication Config Verification 08:20 Summary 🟩 Related Videos and Links: =============================================== https://youtu.be/Fy5Bth5LcVM https://www.youtube.com/playlist?list=PLmVr8r1kmMm3nppYt7exhmfmb-7wUkbCk (Playlist) 🟦 About ============================================== Welcome to telecomTech, where telecom and networking technologies... are simply explained! I’m Lazarus, a telecom professional with over 25 years of experience in network design, architecture, and telecom technologies. Over my career, I’ve led major projects, trained professionals, and helped countless individuals earn certifications and advance their careers. My goal is to make networking and telecom concepts clear, practical, and engaging—the way I wish they were taught when I started learning! Whether you’re a student, a professional growing your skills, or you're preparing for certification exams such as Cisco, telecomTech is here to guide you. Every video is crafted to help you solve real-world challenges with confidence and curiosity. Join me as we explore telecom and networking as a lifelong passion, not just as a job. Let’s make this journey of growth and discovery together! #ospf #authentication #routing #networking #telecomtech