# Using No-Export Community to Filter Transit Routes

DevFeed: [Using No-Export Community to Filter Transit Routes](<https://devfeed.tech/articles/using-no-export-community-to-filter-transit-routes-11050.md>)

Original publisher: [Read original article](<https://blog.ipspace.net/2024/08/bgp-labs-no-export-community/>)

Published: 2024-08-23T06:00:00Z

Content type: tutorial

Language: en

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

Topics: [BGP](<https://devfeed.tech/topics/bgp.md>), [GitHub](<https://devfeed.tech/topics/github.md>)

Tags: [bgp](<https://devfeed.tech/tags/bgp.md>), [github](<https://devfeed.tech/tags/github.md>), [netlab](<https://devfeed.tech/tags/netlab.md>)

## AI overview

This tutorial introduces using the BGP No-Export community to tag routes that should not be propagated to other autonomous systems. It directs readers to a lab in GitHub Codespaces for practice.

## Source excerpt

The very first BGP Communities RFC included an interesting idea: let's tag paths we don't want to propagate to other autonomous systems. For example, the prefixes received from one upstream ISP should not be propagated to another upstream ISP (sadly, things don't work that way in reality). Want to try out that concept? Start the Using No-Export Community to Filter Transit Routes lab in GitHub Codespaces.