--- title: netlab: Applying Simple Configuration Changes «... description: netlab release 25.09 introduces the `files` plugin and `config.inline` functionality, making it easy to apply simple, ad-hoc configuration changes to lab... canonical: https://daily.dev/posts/netlab-applying-simple-configuration-changes-ipspace-net-blog-ohy10hvdy twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: netlab: Applying Simple Configuration Changes « ipSpace.net blog | daily.dev og:description: netlab release 25.09 introduces the `files` plugin and `config.inline` functionality, making it easy to apply simple, ad-hoc configuration changes to lab... og:url: https://daily.dev/posts/netlab-applying-simple-configuration-changes-ipspace-net-blog-ohy10hvdy og:image: https://api.daily.dev/og/posts/OhY10HVdY.png og:image:alt: netlab: Applying Simple Configuration Changes « 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. # netlab: Applying Simple Configuration Changes « ipSpace.net blog **[ipSpace.net Blog](https://daily.dev/sources/ipspace)** · 3 min read · 0 upvotes · 0 comments ## Summary netlab release 25.09 introduces the `files` plugin and `config.inline` functionality, making it easy to apply simple, ad-hoc configuration changes to lab devices without creating full Jinja2 custom configuration templates. Previously, adding a single extra command required setting up a complete template file. Now, inline configuration can be specified directly in the topology YAML under a node or node group using `config.inline`, and netlab handles the template creation behind the scenes. A practical BGP example demonstrates adding a `default-originate` command to an edge router. ## 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 apply a simple extra configuration command to a specific node in netlab without creating a full Jinja2 template? In netlab release 25.09 and later, use the `config.inline` attribute on a node or node group in your topology YAML, combined with the `files` plugin. Set `plugin: [ files ]` at the top level, then under the target node add `config.inline: |` followed by the configuration commands. Netlab automatically creates a Jinja2 template file behind the scenes and applies it using the standard config mechanism. _Network engineers adding one-off device commands in netlab labs share these patterns on daily.dev._ ### What does the netlab files plugin do behind the scenes when config.inline is used? When `config.inline` is set on a node, the files plugin stores the inline content in a file named `_n_.j2` in the lab directory, then converts the node's `config` attribute into a list referencing that filename as a custom configuration template. From there, netlab uses its existing mechanisms to deploy the configuration to the device. _Developers working with netlab internals and plugin behavior find related discussions on daily.dev._ ## Similar posts on daily.dev - [Compress netlab Lab Topologies with Dot Notation « ipSpace.net blog](https://daily.dev/posts/compress-netlab-lab-topologies-with-dot-notation-ipspace-net-blog-johomwxka) · ipSpace.net Blog · 0 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/netlab-applying-simple-configuration-changes-ipspace-net-blog-ohy10hvdy) ```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":"netlab: Applying Simple Configuration Changes « ipSpace.net blog","url":"https://daily.dev/posts/netlab-applying-simple-configuration-changes-ipspace-net-blog-ohy10hvdy","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/netlab-applying-simple-configuration-changes-ipspace-net-blog-ohy10hvdy"},"datePublished":"2026-08-11T08:54:52.663Z","dateModified":"2026-08-24T06:53:21.495Z","description":"netlab release 25.09 introduces the `files` plugin and `config.inline` functionality, making it easy to apply simple, ad-hoc configuration changes to lab...","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/netlab-applying-simple-configuration-changes-ipspace-net-blog-ohy10hvdy","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"networking,bgp","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":"netlab: Applying Simple Configuration Changes « ipSpace.net blog"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/netlab-applying-simple-configuration-changes-ipspace-net-blog-ohy10hvdy#faq","mainEntity":[{"@type":"Question","name":"How do I apply a simple extra configuration command to a specific node in netlab without creating a full Jinja2 template?","acceptedAnswer":{"@type":"Answer","text":"In netlab release 25.09 and later, use the `config.inline` attribute on a node or node group in your topology YAML, combined with the `files` plugin. 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