Select the check box if you want DNS entries to be updated dynamically after the update interval.
Without dynamic DNS updates, system administrators have to manually add DNS information (DNS name and IP address) to the identified DNS servers when a new system is brought online or when existing DNS information changes. This process is not only slow, but also error-prone.
Additionally, in a disaster-recovery situation when a storage system with a large number of vFiler units is brought online, manual configuration of DNS information for those vFiler units can result in a longer-than-needed downtime.
By enabling dynamic DNS updates on your storage system, you allow the storage system to automatically send information to the DNS servers as soon as the information changes on the storage system.