Bring Your Own ASN with IP Prefix to Cherry Servers

Cherry Servers understands that flexibility and control over your server and its operations is crucial to smooth operations. That’s why we empower our clients to integrate their own autonomous system Number (ASN) with IP prefixes to Cherry Server deployments.

We permit you to bring IP subnets starting from /24, 256 IP addresses, to use with your servers at Cherry Servers, enabling you to flexibly manage your project. Please allow up to 24 hours for the process to complete as worldwide ISPs will require time to recognize the new subnet.

#Instructions to Bring Your ASN with IP Prefix to Cherry Servers

To get started with bringing your own IP range to Cherry Servers, there are a number of prerequisites that must first be completed:

• Import and export remarks must be added to your ASN object;
• IP prefixes must have valid ROA records to guarantee route authenticity and prevent prefix highjacking or misconfiguration issues. LOA documentation is also recommended;
• Ensure that your IP prefixes are not blocked in public IP databases for suspected botnets or spamming. Blocked prefixes may be filtered by ISPs, leading to reachability problems.

Please contact our dedicated support engineer team to inform them that you intend to bring your own ASN and IP range, so they can assist you in expediently completing the process.

#1. Select a Cherry Servers Location

Choose the Cherry Servers data center you would like to use your ASN and IP prefixes with, based on where your servers are deployed. You will need this to update your ASN routing as each Cherry Servers data center operates under a distinct ASN. Cherry Servers region ASN are listed in the table below.

#2. Update Your ASN Object

To establish routing with Cherry Servers, update your ASN object through the Regional Internet Registry (RIR) or Internet Routing Registry (IRR) where your ASN is registered. Update your import/export remarks with the Cherry Servers ASN selected in the previous step.

An example using Cherry Servers Lithuania region ASN is shown below. Simply replace “AS16125” with the Cherry Servers ASN of your selected region.

import:         from AS16125 accept ANY

export:         to AS16125 announce <your ASN>

#3. Submit Your ASN and IP Prefix for Validation

Cherry Servers will need to verify the validity of your ASN and IP prefix to ensure compliance with security policies and network integrity. Please provide our dedicated support engineer team with the following information:

• Your ASN,
• The IP prefixes you wish to bring,
• ROA records.

We further recommend that you provide LOA documentation.

Our verification process may take up to 24 hours to complete.

#4. Configure BGP on Your Cherry Servers Project.

After validation has been completed, your ASN will be assigned to your Cherry Servers project. You will then be able to configure local BGP using your ASN and IP address range.

For information on how to perform initial local BGP setup, please visit our dedicated Local BGP Service Guide.

In order to announce the IP prefix, your server must establish a BGP session with Cherry Servers. Configuration depends on your server’s OS and routing software. Most Linux server configurations use BIRD, while Windows-based systems may require a third party BGP client.

To add your custom IP prefix using BIRD v1.6, add the following BGP configuration, where < your prefix > is replaced with your IP prefix, and "< your server main IP >" is replaced with the primary IP assigned to your server.

protocol static stat_my_pfx {
        table master;
        route <your prefix> via <your server main IP>;
 }

#5. Wait for Global Propagation

After submitting information to our engineer support team, please allow up to 24 hours for your IP range to become available. ISPs worldwide may take up to 24 hours to recognize the new subnet.

You can monitor the propagation of your announced prefix using tools such as:

• Hurricane Electric's BGP Toolkit – Provides visibility into your BGP routes across the internet;
• RIPEstat – Analyzes routing and ASN details for your prefix;
• BGPView – Monitors real-time prefix propagation and peer announcements.

Once complete, your IP prefix will be fully operational and available for use under the server announcing it.

If you have any further questions, issues, or concerns, please don’t hesitate to email our support team at: support@cherryservers.com