In message <CABUciRkVT6mBS0ZS3WL4tS7uTPgYNVBkOr890fsB9OoqP=c...@mail.gmail.com> , Alexander Gurvitz writes: > Hi. > > TTL returned by YOUR zone authoritative server will (at least should) be > preferred by caches. > > Matt Larson from verisign explained on these: > > http://www.merit.edu/mail.archives/nanog/2004-07/msg00255.html > > Regards, > Alexander Gurvitz, > net-me.net
TTL of NS records are complicated as the existance of the delegation is covered by the parents NS records but the contents of the NS records comes from the child zone. Named looks at both TTLs to determine when to remove the NS RRset. https://deepthought.isc.org/article/AA-00691/ If you are wanting to workout when to decommission a nameserver take the maximum of the two NS rrset after they have both been updated as when it is safe to decommission. Mark -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org _______________________________________________ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
