---
title: "esx.problem.net.uplink.mtu.failed"
description: "VMkernel failed to set the MTU value on the uplink. The MTU value may be invalid or incompatible with NICs connected as uplinks. Check and correct MTU value, if necessary. Refer to this VMware KB article for more information on the issue."
canonical: "https://helpcenter.veeam.com/docs/mp/kb/esx.problem.net.uplink.mtu.failed.html"
breadcrumb: "Veeam MP for VMware Online Knowledge Base > Event-Based Rules > vSphere Host Network Warning > esx.problem.net.uplink.mtu.failed"
dateModified: "2026-09-10"
---

# esx.problem.net.uplink.mtu.failed

## Summary

VMkernel failed to set the MTU value on the uplink.

## Causes

The MTU value may be invalid or incompatible with NICs connected as uplinks.

## Resolutions

Check and correct MTU value, if necessary. Refer to this [VMware KB article](https://knowledge.broadcom.com/external/article/376568/how-to-investigate-unexpected-link-state.html) for more information on the issue.

## External

Refer to the [VMware Online Documentation](https://techdocs.broadcom.com/) for more information on vCenter event messages and possible solutions.