Once a secondary zone has been created, our DNS solution ensures that it remains synchronized with the master zone through the following workflow:
Serial Number Check: Our DNS solution checks whether the master zone has been updated approximately every 120 seconds.
This check consists of the following steps:
Full Zone Transfer (AXFR): If the master zone's serial number has been incremented, then our DNS solution will submit an AXFR query to the corresponding master name server. The secondary zone will be replaced with the full zone returned by the master name server.
View the raw data by loading the secondary zone and then clicking the "Transfer Data" link corresponding to the desired master name server. Master name servers are listed in the Master Server Group section.
Edgecast CDN