New Skills

New Training: Understand the BGP Best Path Selection Algorithm

by Team Nuggets
New Training: Advanced BGP Foundations picture: A
Published on March 9, 2021

In this 12-video skill, CBT Nuggets trainer Knox Hutchinson explores the finer details of how BGP makes forwarding decisions. Watch this new Juniper training.

Learn with one of these courses:

This training includes:

  • 12 videos

  • 57 minutes of training

You’ll learn these topics in this skill:

  • Local Preference

  • Accumulated Interior Gateway Protocol (AIGP)

  • AS-PATH (Like a Hop Count)

  • Origin Code

  • Multi-Exit Discriminator (MED)

  • eBGP vs iBGP

  • Lowest IGP Metric (Closest Exit)

  • Oldest Path

  • Router ID

  • Cluster List

  • IP Address

  • Summarizing BGP Best Path Selection

How Does BGP Routing Optimize Data Transfer?

BGP or Border Gateway Protocol is an internet routing protocol designed to determine the shortest path for sending data packets across the internet. This protocol leverages the use of a vast interconnection of autonomous systems or AS that help serve routing information for packets traveling across the internet. An Autonomous System or AS can be thought of as any large network that has multiple IP addresses with a unique Autonomous System number known as an ASN.

These autonomous systems help optimize the transmission of information through the use of routing tables. These autonomous system routing tables keep track of the transmission times between various neighboring autonomous systems. The value in managing these AS tables allows for packets in transit to follow the shortest route or optimized path based on AS table values. By leveraging these advanced routing table architectures, we as internet users can access web pages and internet services around the world in milliseconds!

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