BGP Basics Explained Simply | CCNA 200-301

One bad BGP decision can black hole traffic or leak routes far beyond a single router. In this updated 2026 guide for CCNA 200-301, you'll learn exactly how BGP paths are chosen, how policy bends those choices, and how to troubleshoot the whole chain inside your network.

We cover the shift from IGP to Path Vector logic, TCP session establishment on port 179, EBGP vs IBGP design, and the critical attributes like AS_PATH, Local Preference, and MED. Whether you're studying for the exam or managing a live network, this video provides the mental map you need to make BGP click.

For a full 40-minute masterclass covering the deep theory and extended configuration, check out the original BGP Deep Dive here: https://www.youtube.com/watch?v=u6cRfy-8nPs&t=1833s

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