2012/6/6 Mark Andrews <ma...@isc.org> > > 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. >
Mark, could you please describe the algorithm being used by BIND? Does it choose NS rrset with lowest TTL or something else? > 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 > -- AP
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