Configure dynamic advertisement
Use the IP Prefixes page to configure dynamic advertisement
To configure IP prefix assignment from your Cloudflare account home, use the Status drop-down list in the IP Prefixes dialog, as outlined in these steps:
Log in to your Cloudflare accounts Home page and click IP Prefixes.
The IP Prefixes page displays.
To edit a prefix, click the Edit link associated with the entry.
The Edit IP Prefixes dialog displays.
To configure prefix advertisement, select the Advertised or Withdrawn option from the Status drop-down list.
Click Save to commit your changes.
Once you have committed your changes, it takes 2–7 minutes to enable advertisement and approximately 15 minutes to disable (withdraw) advertisement.
Use the Cloudflare API to configure dynamic advertisement
Most dynamic advertisement operations require that you supply the Cloudflare ID for any prefix you want to access with the Cloudflare API. The following section outlines how to obtain Prefix IDs.
Get prefix IDs
To obtain Prefix IDs from the IP Prefixes page, follow these steps: