# Lab: IS-IS Route Redistribution

DevFeed: [Lab: IS-IS Route Redistribution](<https://devfeed.tech/articles/lab-is-is-route-redistribution-11280.md>)

Original publisher: [Read original article](<https://blog.ipspace.net/2025/11/isis-route-redistribution/>)

Published: 2025-11-28T06:45:00Z

Content type: tutorial

Language: en

Sources: [ipSpace.net blog](<https://devfeed.tech/sources/ipspace-net-blog.md>)

Topics: [IS-IS](<https://devfeed.tech/topics/is-is.md>), [GitHub](<https://devfeed.tech/topics/github.md>), [browser](<https://devfeed.tech/topics/browser.md>)

Tags: [browser](<https://devfeed.tech/tags/browser.md>), [github](<https://devfeed.tech/tags/github.md>), [infrastructure](<https://devfeed.tech/tags/infrastructure.md>), [is-is](<https://devfeed.tech/tags/is-is.md>), [netlab](<https://devfeed.tech/tags/netlab.md>), [route](<https://devfeed.tech/tags/route.md>), [router](<https://devfeed.tech/tags/router.md>)

## AI overview

This lab examines route redistribution into IS-IS, including how redistributed prefixes are included in router LSPs and how implementations use metric bits and TLVs. It also provides a safe environment for exploring LSP database contents.

## Source excerpt

Route redistribution into IS-IS seems even easier than its OSPFv2/OSPFv3 counterparts. There are no additional LSAs/LSPs; the redistributed prefixes are included in the router LSP. Things get much more interesting once you start looking into the gory details and exploring how different implementations use (or do not) the various metric bits and TLVs. You'll find more details (and the opportunity to explore the LSP database contents in a safe environment) in the IS-IS Route Redistribution lab exercise. Read more ...