BGP - What is the AS_Path Attribute?

🌐 Visit https://www.telecomtech.io for blog posts, networking tips, and to sign up for the newsletter. 📚 Coming soon: Full networking courses, labs, quizzes, PDFs, and more! 🟥 SUBSCRIBE: https://shorturl.at/TTJxx The AS Path BGP attribute is an important part of the BGP best path algorithm. The AS Path is a list of AS numbers that represents the ASes through which a packet must travel to get to the intended destination. A route with a shorter AS path is always preferred over a longer one. In this video, I'll be explaining in more detail how this attribute functions, and how it can be used to adjust the behavior of BGP. Border Gateway Protocol, or BGP, is a routing protocol that uses a series of attributes to determine the best path through large networks such as the Internet. These attributes are examined in a standardized and predefined sequential order. If you want to find out more about the BGP routing protocol, or the method by which attributes are used to determine the best path, take a look at some of my other videos linked below (after the chapter list...) ☑️ Chapter list: ============================================ 00:00 Introduction 00:22 What is the AS_Path? 01:50 What is the AS_Path Attribute? 03:07 Influencing BGP using the AS_Path 04:34 Summary 🟩 Related Videos and Links: =============================================== Video: What is BGP? - https://youtu.be/fo9YxxKNO_g Video: BGP attributes and determining the best path - https://youtu.be/ZZRsPcNllbU Video: BGP Attribute Categories - https://youtu.be/9sHoHr82odQ Video: BGP - The BGP Weight Attribute - https://youtu.be/akYzsBrrQ70 Video: BGP - The Local Preference Attribute - https://youtu.be/n-CYvVm8aUI Video: BGP - The Originate Attribute - https://youtu.be/xa9OfO6i1_M Video: BGP - Why is the BGP Best Path Algorithm so complex? - https://youtu.be/KGHk_y-nstM BGP Official Definition RFC 4271 - https://datatracker.ietf.org/doc/html/rfc4271 🟦 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! #BGP #NetworkingBasics #algorithm #lazarusagapidis #telecomtech