Intermediate System to Intermediate System (IS-IS) Routing Protocol Fundamentals

ccie r/s ccna r/s ccnp r/s Jan 20, 2017

In our Cisco routing and switching studies, we commonly study routing protocols such as RIP, OSPF, EIGRP, and BGP. However, there's a very scalable, fast converging, link-state routing protocol that often gets overlooked and forgotten. It's Intermediate System to Intermediate System (or IS-IS for short).

IS-IS is primarily found in service provider environments, but even if you're not in the service provider world, you still might run into it at some point during your career. So, I wanted to create a video to take away the fear, uncertainty, and doubt from IS-IS. In this video, we'll look at the basic theory surrounding IS-IS and then go through a simple configuration.

 Enjoy the video!

Kevin Wallace, CCIEx2 (R/S and Collaboration) #7945

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