# Interesting: Crafting Endless AS Paths in BGP

DevFeed: [Interesting: Crafting Endless AS Paths in BGP](<https://devfeed.tech/articles/interesting-crafting-endless-as-paths-in-bgp-11042.md>)

Original publisher: [Read original article](<https://blog.ipspace.net/2024/07/worth-reading-bgp-endless-as-path/>)

Published: 2024-07-31T05:53:00Z

Content type: opinion

Language: en

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

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

Tags: [bgp](<https://devfeed.tech/tags/bgp.md>), [worth-reading](<https://devfeed.tech/tags/worth-reading.md>)

## AI overview

The article discusses a BGP quirk in which combining BGP confederations with AS-override can generate endless AS paths. It agrees with avoiding both features and questions replacing an AS within the confederation portion of an AS path.

## Source excerpt

Vincent Bernat documented a quirk I hope you'll never see outside of a CCIE lab: combining BGP confederations with AS-override can generate endless AS paths. I agree entirely with his conclusions (avoid both features). However, I still think that replacing an AS within the confederation part of an AS path (which should belong to a single well-managed AS) is not exactly the most brilliant idea I've seen.