--- title: Remove Private BGP AS Numbers from the AS Path « BGP Labs description: A hands-on BGP lab exercise covering the removal of private AS numbers from the BGP AS path. When ISPs advertise customer prefixes to peers and upstream... canonical: https://daily.dev/posts/remove-private-bgp-as-numbers-from-the-as-path-bgp-labs-qsjwrl8xh twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Remove Private BGP AS Numbers from the AS Path « BGP Labs | daily.dev og:description: A hands-on BGP lab exercise covering the removal of private AS numbers from the BGP AS path. When ISPs advertise customer prefixes to peers and upstream... og:url: https://daily.dev/posts/remove-private-bgp-as-numbers-from-the-as-path-bgp-labs-qsjwrl8xh og:image: https://api.daily.dev/og/posts/QsjWrL8xH.png og:image:alt: Remove Private BGP AS Numbers from the AS Path « BGP Labs og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Remove Private BGP AS Numbers from the AS Path « BGP Labs **[ipSpace.net Blog](https://daily.dev/sources/ipspace)** · 4 min read · 0 upvotes · 0 comments ## Summary A hands-on BGP lab exercise covering the removal of private AS numbers from the BGP AS path. When ISPs advertise customer prefixes to peers and upstream providers, private AS numbers (like AS 65000) used internally by customers must be stripped from the AS path. The lab walks through identifying the problem in the BGP table, configuring the 'neighbor remove-private-as' feature on the relevant EBGP session, and verifying the result using FRRouting on a simulated ISP topology with netlab. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### How do I remove private AS numbers from the BGP AS path when advertising customer prefixes to upstream peers? Most BGP implementations support a 'neighbor remove-private-as' command (or equivalent) configured on the EBGP session facing the upstream peer or IX partner. After enabling it, a soft reset of the EBGP session may be needed to force the router to resend routing updates with the modified AS paths. This strips private AS numbers (64512–65535) before the updates leave your autonomous system. _Network engineers configuring ISP BGP policies track lab exercises and implementation notes like this on daily.dev._ ## Similar posts on daily.dev - [Enforcing the First AS in BGP AS\_PATHs](https://daily.dev/posts/enforcing-the-first-as-in-bgp-as-paths-yx1xiadkj) · Cloudflare · 0 upvotes · 0 comments - [Running Your Own AS: BGP on FreeBSD with FRR, GRE Tunnels, and Policy Routing](https://daily.dev/posts/running-your-own-as-bgp-on-freebsd-with-frr-gre-tunnels-and-policy-routing-2autkoulu) · Lobsters · 1 upvotes · 0 comments - [A closer look at a BGP anomaly in Venezuela](https://daily.dev/posts/a-closer-look-at-a-bgp-anomaly-in-venezuela-wjsdlj7zk) · Cloudflare · 1 upvotes · 0 comments --- Tags: [#networking](https://daily.dev/tags/networking), [#bgp](https://daily.dev/tags/bgp) [View this post on daily.dev](https://daily.dev/posts/remove-private-bgp-as-numbers-from-the-as-path-bgp-labs-qsjwrl8xh) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Remove Private BGP AS Numbers from the AS Path « BGP Labs","url":"https://daily.dev/posts/remove-private-bgp-as-numbers-from-the-as-path-bgp-labs-qsjwrl8xh","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/remove-private-bgp-as-numbers-from-the-as-path-bgp-labs-qsjwrl8xh"},"datePublished":"2026-08-11T08:55:35.914Z","dateModified":"2026-08-11T09:23:22.893Z","description":"A hands-on BGP lab exercise covering the removal of private AS numbers from the BGP AS path. 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After enabling it, a soft reset of the EBGP session may be needed to force the router to resend routing updates with the modified AS paths. This strips private AS numbers (64512–65535) before the updates leave your autonomous system. Network engineers configuring ISP BGP policies track lab exercises and implementation notes like this on daily.dev."}}]} ```