New Training: BGP Foundation Concepts
In this 6-video skill, CBT Nuggets trainer Jeremy Cioara covers the essentials of Border Gateway Protocol (BGP) and shows you how it differs from other routing protocols. Gain an understanding of BGP path attributes, sessions, neighbors, loop prevention, and more. Watch this new Cisco training.
Watch the full course: Cisco CCNP Enterprise Core
This training includes:
57 minutes of training
You’ll learn these topics in this skill:
Introduction – BGP Foundation Concepts
What is BGP?
BGP Path Attributes and Loop Prevention
BGP Sessions and Neighbors
BGP Best Path Algorithm
What is Border Gateway Protocol (BGP)?
Border Gateway Protocol (BGP) is a protocol that lies at the heart of the Internet, by looking at all available paths for a data packet and choosing the best route between autonomous systems (AS). When you load a web page from a server halfway around the world, it is BGP that makes this happen so quickly.
BGP finds the best path by evaluating conditions based on both reachability and routing information. So, the best path isn't necessarily the shortest path, as congestion and delay may make a shorter path take longer to traverse.
BGP works through peering agreements that have been made between AS to allow network traffic between them. At the edge of these AS are BGP routers, which advertise to their peers in other AS the IP address prefixes that they can transmit data to. They make these advertisements through regular announcements, which then update each router's routing table.