BGP - BGP Algorithm Prefers the Lowest Router ID
🌐 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
As we continue to move down the list of BGP attributes that are examined to determine the best path, one of the last attributes to be examined is the router ID. BGP prefers the route that is learned from the neighbor with the lowest router ID. In this video, I'll be explaining this particular attribute, and we'll see how it is used to break the tie.
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
00:29 BGP Best Path Algorithm
01:21 What is the BGP Router ID?
02:42 Lowest Router ID is Preferred
04:40 Valid for eBGP and iBGP?
06:49 Reaching the End of the BGP Algorithm
07:26 Summary
Corrections:
3:20 The AS Path should show 160 not 100 since that is the next (and only) AS. Thanks to
@SwagatNarayanMohanty for discovering this error!!
🟩 Related Videos and Links:
===============================================
Video: What is BGP? - • What is BGP?
Video: BGP attributes and determining the best path - • BGP Attributes and Determining the Best Path
Video: BGP Attribute Categories - • BGP Attribute Categories - well-known opti...
Video: BGP - The BGP Weight Attribute - • BGP - The BGP Weight Attribute
Video: BGP - Why is the BGP Best Path Algorithm so complex? - • BGP - Why is the BGP Best Path Algorithm s...
Video: BGP - What is the Local Preference Attribute? - • BGP - What is the Local Preference BGP Att...
Video: BGP - What is the Origin Code BGP Attribute? - • BGP - What is the Origin Code BGP Attribute?
Video: BGP - What is the MED BGP attribute? - • BGP - What is the MED BGP Attribute?
Video: BGP - Why does the BGP Algorithm Prefer eBGP routes over iBGP routes? - • BGP - Why does the BGP Algorithm Prefer eB...
Video: BGP - Route with lowest IGP metric to the next hop is preferred - • BGP - Route with the Lowest IGP Metric to ...
Video: BGP - Algorithm Prefers the Oldest External Path - • BGP - Algorithm Prefers the Oldest Externa...
BGP Official Definition RFC 4271 - https://datatracker.ietf.org/doc/html...
🟦 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 #bgpattributes #bgpalgorithm #lowestrouterID #routerID #algorithm #ebgp #ibgp #lazarusagapidis