--- title: Worth Reading: Another BGP Session Reset Bug «... description: A brief pointer to Emile Aben's RIPE Labs post documenting a real-world incident where BGP paths with an unknown attribute triggered session resets across the... canonical: https://daily.dev/posts/worth-reading-another-bgp-session-reset-bug-ipspace-net-blog-lxlnyund3 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Worth Reading: Another BGP Session Reset Bug « ipSpace.net blog | daily.dev og:description: A brief pointer to Emile Aben's RIPE Labs post documenting a real-world incident where BGP paths with an unknown attribute triggered session resets across the... og:url: https://daily.dev/posts/worth-reading-another-bgp-session-reset-bug-ipspace-net-blog-lxlnyund3 og:image: https://api.daily.dev/og/posts/lxlnYunD3.png og:image:alt: Worth Reading: Another BGP Session Reset Bug « ipSpace.net blog 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. # Worth Reading: Another BGP Session Reset Bug « ipSpace.net blog **[ipSpace.net Blog](https://daily.dev/sources/ipspace)** · 1 min read · 0 upvotes · 0 comments ## Summary A brief pointer to Emile Aben's RIPE Labs post documenting a real-world incident where BGP paths with an unknown attribute triggered session resets across the global Internet, despite RFC 7606 specifying how unknown attributes should be handled gracefully. The author draws a parallel to the August 2010 BGP experiment incident, noting that the same class of bug continues to surface. Links to related webinars on network and Internet routing security are provided. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### Why do BGP sessions reset when a router receives an unknown path attribute? BGP implementations that do not correctly follow RFC 7606 may reset sessions upon encountering an unknown attribute instead of handling it gracefully. RFC 7606 was specifically designed to prevent this by defining how routers should treat malformed or unknown attributes without tearing down the session, but some implementations still trigger resets in practice, as observed in real-world Internet routing incidents. _Network engineers troubleshooting BGP stability issues track incidents like this on daily.dev._ ## Similar posts on daily.dev - [BGP ORIGIN attribute manipulation and its impact on the Internet](https://daily.dev/posts/bgp-origin-attribute-manipulation-and-its-impact-on-the-internet-fpdysqlcf) · Cloudflare · 2 upvotes · 0 comments - [Telecom Attack Surface: SS7, BGP & Nation-State Intrusions](https://daily.dev/posts/telecom-attack-surface-ss7-bgp-nation-state-intrusions-v1wejqstm) · Cyble · 0 upvotes · 0 comments - [Exploring the BGP Neighbor CONNECT State « ipSpace.net blog](https://daily.dev/posts/exploring-the-bgp-neighbor-connect-state-ipspace-net-blog-q28k0i62x) · ipSpace.net Blog · 0 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: [#security](https://daily.dev/tags/security), [#bgp](https://daily.dev/tags/bgp) [View this post on daily.dev](https://daily.dev/posts/worth-reading-another-bgp-session-reset-bug-ipspace-net-blog-lxlnyund3) ```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":"Worth Reading: Another BGP Session Reset Bug « ipSpace.net blog","url":"https://daily.dev/posts/worth-reading-another-bgp-session-reset-bug-ipspace-net-blog-lxlnyund3","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/worth-reading-another-bgp-session-reset-bug-ipspace-net-blog-lxlnyund3"},"datePublished":"2026-08-11T08:56:04.578Z","dateModified":"2026-08-11T09:27:40.698Z","description":"A brief pointer to Emile Aben's RIPE Labs post documenting a real-world incident where BGP paths with an unknown attribute triggered session resets across the...","image":"https://media.daily.dev/image/upload/s--CxzD6vbw--/f_auto/v1722860399/public/Placeholder%2005","thumbnailUrl":"https://media.daily.dev/image/upload/s--CxzD6vbw--/f_auto/v1722860399/public/Placeholder%2005","isAccessibleForFree":true,"articleSection":"ipSpace.net Blog","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"ipSpace.net Blog","logo":"https://media.daily.dev/image/upload/s--xS7E82MT--/f_auto,q_auto/v1786438303/logos/ipspace?_a=BAMAMicg0","url":"https://daily.dev/sources/ipspace"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/worth-reading-another-bgp-session-reset-bug-ipspace-net-blog-lxlnyund3","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"security,bgp","timeRequired":"PT1M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"ipSpace.net Blog","item":"https://daily.dev/sources/ipspace"},{"@type":"ListItem","position":3,"name":"Worth Reading: Another BGP Session Reset Bug « ipSpace.net blog"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/worth-reading-another-bgp-session-reset-bug-ipspace-net-blog-lxlnyund3#faq","mainEntity":[{"@type":"Question","name":"Why do BGP sessions reset when a router receives an unknown path attribute?","acceptedAnswer":{"@type":"Answer","text":"BGP implementations that do not correctly follow RFC 7606 may reset sessions upon encountering an unknown attribute instead of handling it gracefully. RFC 7606 was specifically designed to prevent this by defining how routers should treat malformed or unknown attributes without tearing down the session, but some implementations still trigger resets in practice, as observed in real-world Internet routing incidents. Network engineers troubleshooting BGP stability issues track incidents like this on daily.dev."}}]} ```