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What is IS-IS?

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Manage episode 524682439 series 3444546
Content provided by Andy and Friends. All podcast content including episodes, graphics, and podcast descriptions are uploaded and provided directly by Andy and Friends or their podcast platform partner. If you believe someone is using your copyrighted work without your permission, you can follow the process outlined here https://podcastplayer.com/legal.

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Most network engineers know BGP, OSPF, and maybe EIGRP, but far fewer have hands-on experience with ISIS. In this episode of The Art of Network Engineering, Andy Lapteff sits down with Russ White and Mike Bushong for a deep, opinionated, and refreshingly honest discussion about routing protocol design in modern data centers.
We explore why BGP has become the default hammer for every networking nail, what we lose when we blend underlay and overlay into a single protocol, and why some of the largest networks in the world still rely on IS-IS for simplicity, scale, and resilience.
This isn’t a “which protocol is best” argument, it’s a design conversation. One about failure domains, operational reality, education gaps, and why many engineers never learn the protocols that quietly power hyperscale networks.
In this episode:
Why BGP is policy-rich but intentionally slow
The architectural value of separating underlay and overlay
How ISIS works and why it’s simpler than you think
TLVs, scalability, and protocol evolution
Why familiarity often beats good design (for better or worse)
Where RIFT fits and where it doesn’t
The cost of losing deep protocol knowledge as engineers retire
If you’ve ever wondered why networks are designed the way they are, or if you’ve felt uneasy about “just using BGP everywhere,” this conversation is for you.
Subscribe for more conversations where technology meets the human side of IT.

This episode has been sponsored by Meter.

Go to meter.com/aone to book a demo now!

You can support the show at the link below.

Support the show

Find everything AONE right here: https://linktr.ee/artofneteng

  continue reading

191 episodes

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What is IS-IS?

The Art of Network Engineering

13 subscribers

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Manage episode 524682439 series 3444546
Content provided by Andy and Friends. All podcast content including episodes, graphics, and podcast descriptions are uploaded and provided directly by Andy and Friends or their podcast platform partner. If you believe someone is using your copyrighted work without your permission, you can follow the process outlined here https://podcastplayer.com/legal.

Send us a text

Most network engineers know BGP, OSPF, and maybe EIGRP, but far fewer have hands-on experience with ISIS. In this episode of The Art of Network Engineering, Andy Lapteff sits down with Russ White and Mike Bushong for a deep, opinionated, and refreshingly honest discussion about routing protocol design in modern data centers.
We explore why BGP has become the default hammer for every networking nail, what we lose when we blend underlay and overlay into a single protocol, and why some of the largest networks in the world still rely on IS-IS for simplicity, scale, and resilience.
This isn’t a “which protocol is best” argument, it’s a design conversation. One about failure domains, operational reality, education gaps, and why many engineers never learn the protocols that quietly power hyperscale networks.
In this episode:
Why BGP is policy-rich but intentionally slow
The architectural value of separating underlay and overlay
How ISIS works and why it’s simpler than you think
TLVs, scalability, and protocol evolution
Why familiarity often beats good design (for better or worse)
Where RIFT fits and where it doesn’t
The cost of losing deep protocol knowledge as engineers retire
If you’ve ever wondered why networks are designed the way they are, or if you’ve felt uneasy about “just using BGP everywhere,” this conversation is for you.
Subscribe for more conversations where technology meets the human side of IT.

This episode has been sponsored by Meter.

Go to meter.com/aone to book a demo now!

You can support the show at the link below.

Support the show

Find everything AONE right here: https://linktr.ee/artofneteng

  continue reading

191 episodes

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