How to Filter OSPF Routes Within an Area (Distribute-List Trick)

👍 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 secret of OSPF route filtering within an area! In this video, I explain why OSPF, as a link-state routing protocol, doesn’t allow traditional route filtering between routers in the same area, and how to use a distribute-list to filter what actually enters the routing table. We’ll walk through configuration, verification, and caveats to avoid pitfalls like traffic black holes. Perfect for CCNA, CCNP, and network engineers looking to master OSPF in real-world scenarios. ☑️ Chapter list: ============================================ 00:00 Introduction 00:18 OSPF Route Filtering Basics 01:55 OSPF Filtering "Trick" 02:14 Distribute-list Topology 02:42 OSPF Configuration 04:15 Distribute-list Configuration 05:33 Distribute-list Config Verification 06:17 Use Distribute-lists With Caution 07:13 Summary 🟩 Related Videos and Links: ===============================================    • OSPF Multi-Area Deployment on Cisco IOS Ro...      • OSPF   (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 #routing #distribute-list #networking #telecomtech