--- title: Configuring SRv6 on Junos (Locator and IGP) «... description: A walkthrough of configuring SRv6 micro-SIDs on Junos, covering the routing-options srv6 locator block and the IS-IS protocol configuration needed to advertise... canonical: https://daily.dev/posts/configuring-srv6-on-junos-locator-and-igp-ipspace-net-blog-bhavnkj81 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Configuring SRv6 on Junos (Locator and IGP) « ipSpace.net blog | daily.dev og:description: A walkthrough of configuring SRv6 micro-SIDs on Junos, covering the routing-options srv6 locator block and the IS-IS protocol configuration needed to advertise... og:url: https://daily.dev/posts/configuring-srv6-on-junos-locator-and-igp-ipspace-net-blog-bhavnkj81 og:image: https://api.daily.dev/og/posts/bHAvnkJ81.png og:image:alt: Configuring SRv6 on Junos (Locator and IGP) « 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. # Configuring SRv6 on Junos (Locator and IGP) « ipSpace.net blog **[ipSpace.net Blog](https://daily.dev/sources/ipspace)** · 3 min read · 0 upvotes · 0 comments ## Summary A walkthrough of configuring SRv6 micro-SIDs on Junos, covering the routing-options srv6 locator block and the IS-IS protocol configuration needed to advertise the locator as a node uSID. Includes actual Junos configuration snippets and an IS-IS database output showing the SRv6 locator and SID structure TLVs. Explains why the SRv6 locator must be added to IS-IS even for pure L3VPN use cases, since it inserts the locator prefix into IPv6 routing tables on other routers for SRv6 forwarding. This work was done to add netlab Junos SRv6 support, shipping in the 26.10 release. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### Why do I need to add the SRv6 locator to IS-IS if I only plan to use SRv6 for L3VPN services? The SRv6 locator must be added to the IS-IS configuration even for pure layer-3 VPN use cases because that step gets the SRv6 TLVs and the locator prefix inserted into the IS-IS link-state packet. Other IS-IS routers then install that locator prefix into their IPv6 routing tables, which is what enables them to forward SRv6-encapsulated packets toward the destination. _daily.dev surfaces practical SRv6 and IS-IS configuration notes for engineers deploying segment routing._ ### How do I configure an SRv6 micro-SID locator in Junos routing-options? Define it under routing-options source-packet-routing srv6, with a locator block naming the locator (for example 'dut') and the IPv6 prefix such as 5f00:0:1::/48, followed by the micro-sid keyword to enable micro-SID mode. No separate SRv6 block configuration is required for this to function correctly, based on working lab tests, though the block keyword is sometimes recommended. _Engineers configuring SRv6 on Junos can track hands-on config walkthroughs like this via daily.dev._ ## Similar posts on daily.dev - [BGP-Free Network Core with SRv6 « ipSpace.net blog](https://daily.dev/posts/bgp-free-network-core-with-srv6-ipspace-net-blog-9bbn88wub) · ipSpace.net Blog · 0 upvotes · 0 comments - [IPng Networks](https://daily.dev/posts/ipng-networks-u37jx9af5) · IPng Networks · 0 upvotes · 0 comments - [netlab 26.10: SRv6, More Netmiko « ipSpace.net blog](https://daily.dev/posts/netlab-26-10-srv6-more-netmiko-ipspace-net-blog-1cocu1zdt) · ipSpace.net Blog · 0 upvotes · 0 comments - [The Never-Ending IPv6 Loopback Prefix Saga « ipSpace.net blog](https://daily.dev/posts/the-never-ending-ipv6-loopback-prefix-saga-ipspace-net-blog-4nlhgh10l) · ipSpace.net Blog · 0 upvotes · 0 comments - [MPLS/VPN with SR-MPLS Core « ipSpace.net blog](https://daily.dev/posts/mpls-vpn-with-sr-mpls-core-ipspace-net-blog-nw3uwiphe) · ipSpace.net Blog · 0 upvotes · 0 comments --- Tags: [#networking](https://daily.dev/tags/networking) [View this post on daily.dev](https://daily.dev/posts/configuring-srv6-on-junos-locator-and-igp-ipspace-net-blog-bhavnkj81) ```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":"Configuring SRv6 on Junos (Locator and IGP) « ipSpace.net blog","url":"https://daily.dev/posts/configuring-srv6-on-junos-locator-and-igp-ipspace-net-blog-bhavnkj81","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/configuring-srv6-on-junos-locator-and-igp-ipspace-net-blog-bhavnkj81"},"datePublished":"2026-09-30T06:21:11.794Z","dateModified":"2026-09-30T06:21:30.730Z","description":"A walkthrough of configuring SRv6 micro-SIDs on Junos, covering the routing-options srv6 locator block and the IS-IS protocol configuration needed to advertise...","image":"https://media.daily.dev/image/upload/s--58gMhC4P--/f_auto/v1722860399/public/Placeholder%2012","thumbnailUrl":"https://media.daily.dev/image/upload/s--58gMhC4P--/f_auto/v1722860399/public/Placeholder%2012","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/configuring-srv6-on-junos-locator-and-igp-ipspace-net-blog-bhavnkj81","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"networking","timeRequired":"PT3M"} {"@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":"Configuring SRv6 on Junos (Locator and IGP) « ipSpace.net blog"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/configuring-srv6-on-junos-locator-and-igp-ipspace-net-blog-bhavnkj81#faq","mainEntity":[{"@type":"Question","name":"Why do I need to add the SRv6 locator to IS-IS if I only plan to use SRv6 for L3VPN services?","acceptedAnswer":{"@type":"Answer","text":"The SRv6 locator must be added to the IS-IS configuration even for pure layer-3 VPN use cases because that step gets the SRv6 TLVs and the locator prefix inserted into the IS-IS link-state packet. 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