Links MAY Become One-Way. STP Loop Guard Protects You if That Happens.

Fiber optic links between switches can fail in ways that create a unidirectional link: A link that can forward frames in only one direction. In that case, normal Spanning Tree operation may choose an STP topology that creates a forwarding loop.
In this video, learn about the underlying cause (the unidirectional link), and how the STP Loop Guard feature can be used to prevent STP from creating the forwarding loop.

📘 Matches CCNA Official Cert Guide:
Volume 1 Chapter 10 Section 2E

Chapters
00:00 Intro
01:31 Loop Guard STP Basics
06:22 Unidirectional Links and Loop Guard
12:18 Interface Config
15:23 Global Config
16:22 Exam Success


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