--- title: Routing between VXLAN Segments « VXLAN and EVPN Labs description: A hands-on lab exercise covering Integrated Routing and Bridging (IRB) between VXLAN segments. The lab uses two directly-connected switches (S1 and S2) with... canonical: https://daily.dev/posts/routing-between-vxlan-segments-vxlan-and-evpn-labs-p8vquxprb twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Routing between VXLAN Segments « VXLAN and EVPN Labs | daily.dev og:description: A hands-on lab exercise covering Integrated Routing and Bridging (IRB) between VXLAN segments. The lab uses two directly-connected switches (S1 and S2) with... og:url: https://daily.dev/posts/routing-between-vxlan-segments-vxlan-and-evpn-labs-p8vquxprb og:image: https://api.daily.dev/og/posts/p8vquxPrb.png og:image:alt: Routing between VXLAN Segments « VXLAN and EVPN 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. # Routing between VXLAN Segments « VXLAN and EVPN Labs **[ipSpace.net Blog](https://daily.dev/sources/ipspace)** · 5 min read · 0 upvotes · 0 comments ## Summary A hands-on lab exercise covering Integrated Routing and Bridging (IRB) between VXLAN segments. The lab uses two directly-connected switches (S1 and S2) with red and blue VLANs, each extended over VXLAN using static ingress replication. Learners configure IP addresses on VLAN interfaces, set up VXLAN segments with specific VNIs (10010 and 10011), and verify cross-VLAN and cross-switch connectivity. The exercise also explains asymmetric IRB behavior, where the routing path differs depending on direction of traffic, and warns against configuring OSPF on VLAN interfaces to avoid recursive routing issues. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What is asymmetric IRB in VXLAN and how does it affect routing paths? Asymmetric IRB means the router handling traffic differs depending on direction. Each host uses its adjacent switch as the first-hop router, so in a VXLAN-extended VLAN setup, the HB1-to-HR2 path routes through S1 while the HR2-to-HB1 return path routes through S2. Both switches must have IP addresses configured on all VLAN interfaces for this to work correctly. _Network engineers building VXLAN fabrics track IRB design trade-offs like these on daily.dev._ ### Why should I not configure OSPF on VLAN interfaces in a VXLAN IRB setup? Configuring OSPF on VLAN interfaces in a VXLAN IRB setup causes recursive routing and periodic black holes. The recommended approach is to avoid OSPF on VLAN interfaces entirely, or better yet, create a dedicated tenant VRF and assign all VLAN interfaces to that VRF to isolate the routing domain. _Engineers designing VXLAN overlays find discussions on routing isolation and VRF segmentation on daily.dev._ ## Similar posts on daily.dev - [EVPN with SR-MPLS Core « ipSpace.net blog](https://daily.dev/posts/evpn-with-sr-mpls-core-ipspace-net-blog-taobtibzc) · ipSpace.net Blog · 0 upvotes · 0 comments --- [View this post on daily.dev](https://daily.dev/posts/routing-between-vxlan-segments-vxlan-and-evpn-labs-p8vquxprb) ```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":"Routing between VXLAN Segments « VXLAN and EVPN Labs","url":"https://daily.dev/posts/routing-between-vxlan-segments-vxlan-and-evpn-labs-p8vquxprb","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/routing-between-vxlan-segments-vxlan-and-evpn-labs-p8vquxprb"},"datePublished":"2026-08-11T08:52:23.785Z","dateModified":"2026-08-11T09:10:08.458Z","description":"A hands-on lab exercise covering Integrated Routing and Bridging (IRB) between VXLAN segments. 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