# Advertise BYOIP

You can advertise your own publicly routable IP addresses (BYOIPs) to a peering ASN, making BYOIPs reachable and accessible within the network infrastructure.

## Prerequisites

To successfully advertising your BYOIPs, you need to have:

1. **A valid advertising prefix**\
   **-** Your AS is authorized to originate routes, which can be queried in mainstream IRR databases, such as: [https://radb.net](https://radb.net/).\
   \- Your routes are RPKI authenticated;
2. **A BGP session for advertising BYOIPs**\
   Ensure the IP version of the BGP session matches the version of the IP prefix to be advertised.

## Procedures

<div align="left"><figure><img src="https://3201622183-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F9X3FDdkCL2HzhbPpPMFt%2Fuploads%2FAhbVq3NojH5bCUaAlTuE%2Fimage.png?alt=media&#x26;token=4f86ab32-bf73-4d16-914b-aeb921a689db" alt="" width="563"><figcaption><p>Advertise BYOIP</p></figcaption></figure></div>

1. On the upper left corner of zenConsole, go to **Products** > **Global BGP** > **BYOIP** > **Advertise BYOIP**.
2. Select the BGP session that you want to advertise BYOIP.
3. Enter the IP prefix.
4. More settings\
   \- Select a resource group for your BYOIP\
   \- Add a note for your BYOIP
5. Click **Advertise Now**.

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

* <mark style="color:blue;">Ensure the IP version of BGP session and the IP prefix to be advertised are the same.</mark>
* <mark style="color:blue;">The network mask should be no larger than 64.</mark>
* <mark style="color:blue;">Only the authorized AS can advertise the IP prefix. Confirm your IP ownership and validate:</mark>
  * <mark style="color:blue;">RADB authorized;</mark>
  * <mark style="color:blue;">RPKI authenticated.</mark>
    {% endhint %}

## Result

After your BYOIP is advertised, you will find it in your BYOIP list.

<div align="left"><figure><img src="https://3201622183-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F9X3FDdkCL2HzhbPpPMFt%2Fuploads%2F0BXqu09wDOiyw0f5c7iF%2Fimage.png?alt=media&#x26;token=0af4dc42-8bf7-41d7-9ad8-c088e3e920c8" alt=""><figcaption><p>BYOIP List</p></figcaption></figure></div>

You can delete the advertised BYOIP and advertise it again if you need.

## What to Do Next

After advertising your BYOIP, you can [**Test Advertised IP Reachable or Not**](https://docs.console.zenlayer.com/welcome/global-bgp/advertise-byoip/test-advertised-ip-reachable-or-not).