--- title: IPng Networks | daily.dev description: A deep technical exploration of SRv6 (Segment Routing for IPv6) implemented in VPP (Vector Packet Processor). Covers SRv6 fundamentals including the Segment... canonical: https://daily.dev/posts/ipng-networks-u37jx9af5 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: IPng Networks | daily.dev og:description: A deep technical exploration of SRv6 (Segment Routing for IPv6) implemented in VPP (Vector Packet Processor). Covers SRv6 fundamentals including the Segment... og:url: https://daily.dev/posts/ipng-networks-u37jx9af5 og:image: https://api.daily.dev/og/posts/U37jx9aF5.png og:image:alt: IPng Networks 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. # IPng Networks **[IPng Networks](https://daily.dev/sources/ipngch)** · 25 min read · 0 upvotes · 0 comments ## Summary A deep technical exploration of SRv6 (Segment Routing for IPv6) implemented in VPP (Vector Packet Processor). Covers SRv6 fundamentals including the Segment Routing Header structure, SR Policies, Source/Transit/Endpoint nodes, and practical L2VPN configuration. The author extends VPP to support SRv6 encap/decap on sub-interfaces (not just physical interfaces), discovers and fixes a quad-loop bug in `sr_policy_rewrite_encaps_l2()` that caused ~75% packet loss when segment lists had length 1, and adds unit tests for PHY and sub-interface encap/decap scenarios. The change (~850 LOC) is submitted for upstream review on fd.io Gerrit. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [IPng Networks](https://daily.dev/posts/ipng-networks-6ky2laf7k) · IPng Networks · 0 upvotes · 0 comments --- Tags: [#networking](https://daily.dev/tags/networking) [View this post on daily.dev](https://daily.dev/posts/ipng-networks-u37jx9af5) ```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":"IPng Networks","url":"https://daily.dev/posts/ipng-networks-u37jx9af5","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/ipng-networks-u37jx9af5"},"datePublished":"2026-02-21T13:32:35.237Z","dateModified":"2026-02-21T13:33:04.482Z","description":"A deep technical exploration of SRv6 (Segment Routing for IPv6) implemented in VPP (Vector Packet Processor). Covers SRv6 fundamentals including the Segment...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/144a58e132ba5e2a64ce6f2b9ad80e1e?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/144a58e132ba5e2a64ce6f2b9ad80e1e?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"IPng Networks","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":"IPng Networks","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/f8de3b22827940ef8480ebd2b86e8388","url":"https://daily.dev/sources/ipngch"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/ipng-networks-u37jx9af5","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"networking","timeRequired":"PT25M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"IPng Networks","item":"https://daily.dev/sources/ipngch"},{"@type":"ListItem","position":3,"name":"IPng Networks"}]} ```