> For the complete documentation index, see [llms.txt](https://docs.console.zenlayer.com/welcome/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.console.zenlayer.com/welcome/ip-transit/manage-ip-transit/change-md5-key.md).

# Change MD5 Key

## Prerequisites

This operation is only available for IP Transit using BGP Routing Mode.

## Procedures

1. Go to **Actions** > **Change MD5 Key**.

<div align="left"><figure><img src="/files/F6gvUMVb9zlLiMw2s0Fl" alt="" width="329"><figcaption></figcaption></figure></div>

2. Enter a new security key.

{% hint style="info" %} <mark style="color:blue;">**Note**</mark>

<mark style="color:blue;">This action may cause a service interruption. Please operate with caution.</mark>
{% endhint %}