> For the complete documentation index, see [llms.txt](https://platform9.com/kb/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://platform9.com/kb/pcd/networking/mtu-for-virtual-networks-cannot-be-modified.md).

# MTU for Virtual Networks Cannot be Modified

## Problem

* MTU for Virtual Networks cannot be modified.
* PCD UI does not provide any option to increase the MTU for Virtual Networks.

## Environment

* Private Cloud Director Virtualization - v2026.1 and Higher
* Self Hosted Private Cloud Director Virtualization - v2026.1 and Higher

## Cause

* This is a known issue and is already reported with ID: **PCD-6454**.

{% hint style="info" %}
Refer the [**Workaround**](#workaround) section on how to set the MTU for Virtual Networks.
{% endhint %}

## Workaround

* MTU for Virtual Networks can be modified through CLI.
* In the RC file that is needed for the communication between `pcdctl` CLI and PCD, change the variable `OS_INTERFACE` value from `public` to `admin`.
* Set the relevant tenant name in the `OS_PROJECT_NAME` variable if applicable.
* Re-source the RC file.
* Change the MTU using the below command:

{% code title="" %}

```bash
pcdctl network set --mtu <MTU_VALUE> <NETWORK_UUID/NAME>
```

{% endcode %}

## Additional Information

* Reach out to Platform9 Support with the issue ID mentioned in the [**Cause**](#cause) section if there are any questions/concerns.


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