BGP III: Scalability in Larger ISPs Border Gateway Protocol (BGP) is an advanced routing protocol. This is the third and last in a series of tutorials dealing with BGP and Internet routing. In this tutorial the author explores issues primarily of concern to ISPs, which usually have the largest BGP networks. Scaling issues, at their most basic, fall into the categories of scaling inside the provider AS and between multiple provider AS. Notice that I did not say iBGP and eBGP. Broader issues are more involved than BGP alone. There are issues of design, and of the interaction of interior routing with exterior routing. This Study Guide is part of a three-part Study Guide Series addressing BPG: Part One - The Problem, the Protocol, and Principles of Use Part Two - Basic Multihoming; User & Provider Views Part Three - Scalability in Larger ISPs Become a ZONE Subscriber and gain access to all Study Guides Author: Howard C. Berkowitz Technical Level: CCIE™ and CCNP™ CCNP-BSCI Date of Issue: 09-01-2023 Rating:     (Not Yet Rated)  Table of Contents  Tutorial  3 Sample Study Questions  25 Study Questions  Lab Scenario Abstract  Lab Scenario Return to Study Guides