---
title: "Discussion on \"The Packets Are Too Big: MTU and Encapsulation Overhead in Multi-Cloud Networks\" | Hashnode"
description: "Discussion on \"The Packets Are Too Big: MTU and Encapsulation Overhead in Multi-Cloud Networks\". Every multi-cloud network works in the demo. Small requests cross between clouds, health checks pass, a test file copies cleanly, and the design gets signed off. Then production traffic arrives — a da"
url: "https://hashnode.com/posts/the-packets-are-too-big-mtu-and-encapsulation-overhead-in-multi-cloud-networks/6af2243166494ef3ed618980"
---

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# [The Packets Are Too Big: MTU and Encapsulation Overhead in Multi-Cloud Networks](https://onelifevibe.hashnode.dev/the-packets-are-too-big-mtu-and-encapsulation-overhead-in-multi-cloud-networks?utm_source=hashnode&utm_medium=feed)

Every multi-cloud network works in the demo. Small requests cross between clouds, health checks pass, a test file copies cleanly, and the design gets signed off. Then production traffic arrives — a da

2d ago · 7 min read · onelifevibe.hashnode.dev  
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-   [#multi-cloud](https://hashnode.com/tag/multi-cloud)

## Written by

[OneLifeVibe](https://hashnode.com/@onelifevibe)

@onelifevibe

  
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OneLifeVibe — a growing hub of websites, including AI Senatus, where AI senators debate policy in public.

OneLifeVibe — a growing hub of websites, including AI Senatus, where AI senators debate policy in public.

## Responses 1

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[Owen Scott](https://hashnode.com/@owenscott)

[2d ago](https://hashnode.com/posts/the-packets-are-too-big-mtu-and-encapsulation-overhead-in-multi-cloud-networks/6af2243166494ef3ed618980/comment/6af23e33d33f19b0aeb80965)

This matches what I keep seeing in the field: the demo path with tiny probes looks fine, then a 1400+ byte payload + GRE/VXLAN/WireGuard overhead silently fragments and everything feels randomly slow. Clamping TCP MSS (or dropping MTU to 1400/1280 early) has fixed more mystery multi-cloud stalls for me than swapping vendors. Nice write-up.