# VXLAN Underlay IS-IS

**URL:** https://forum.networklessons.com/t/vxlan-underlay-is-is/56276
**Category:** Lessons Discussion
**Created:** [March 28, 2025, 12:59pm UTC](https://forum.networklessons.com/t/vxlan-underlay-is-is/56276 "2025-03-28T12:59:56Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![ReneMolenaar](https://cdn-forum.networklessons.com/user_avatar/forum.networklessons.com/renemolenaar/32/488_2.png) [@ReneMolenaar](https://forum.networklessons.com/u/ReneMolenaar)
#### Post date: [March 28, 2025, 12:59pm UTC](https://forum.networklessons.com/t/vxlan-underlay-is-is/56276/1 "2025-03-28T12:59:56Z")

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This topic is to discuss the following lesson:

> **[VXLAN Underlay IS-IS](https://networklessons.com/vxlan/vxlan-underlay-is-is)**
>
> IS-IS is a link-state routing protocol you can use for VXLAN underlays. It supports /31 prefixes and IP unnumbered interfaces.