We can distinguish between two types of resource records: Once done, a new Non-Refresh Interval will start and the record will noĭNS aging uses the resource record timestamp to identify if it is stale or not. Once done, a new Non-Refresh Interval period will start.Įven if the Non-Refresh and Refresh intervals were elapsed, a resource record can be refreshed as long as the record was not removed from the DNS zone. If the Non-Refresh Interval and the Refresh Interval are seven (7) days then a resource record can be refreshed after 7 days starting from the last refresh. If the Non-Refresh Interval and the Refresh Interval are seven (7) days then a resource record is considered as stale if not refreshed after fourteen (14) days.
Where is the dnc server update#
A DNS dynamic update to change the registered IP for a resource record is not considered as a refresh and is exempt from the Non-Refresh Interval. (*) A resource record refresh is a DNS dynamic update where the host name and IP do not change.
Non-Refresh Interval: It is a period of time during which a resource record cannot be refreshed (*).It actually uses two intervals and a DNS record is considered as stale once both are elapsed. What is aging?Īging is a feature that allows identifying stale DNS records. This Wiki article explains how this mechanism works and what you should take care about when you enable it. DNS aging and scavenging allows an automatic cleanup and removal of stale resource records.
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