I would concur that internally Anycast is best for client facing edge nodes to reduce client configuration complexity as well as reducing impact of a first resolver outage.
On Sun, May 8, 2022, 7:59 AM Tony Finch <f...@isc.org> wrote: > Bob McDonald <bmcdonal...@gmail.com> wrote: > > > > My question is this; how do the recursive servers determine from > > the information in the stub zone which name server to query? > > As well as what Bob Croswell said about SRTT (which is entirely correct), > there's a subtlety with stub zones in particular. > > A stub zone works a bit like the root zone hints, in that the name servers > that you configure are just used to find the zone's NS records. This means > that stub zones don't override where queries are routed for these zones. > If you want your resolver to ignore the NS records on your internal zones, > you should use static-stub instead. > > Regarding anycast, it isn't necessary for internal authoritative servers > unless your organization is really huge (and probably not even then): it > is simpler to just use the DNS's standard reliabilty features. All you > need to do is have more than one authoritative server for each zone. > On the other hand, anycast is a good way to improve the availability and > maintainability of your resolvers, because your users' devices talk > directly to them, and if they don't work there might as well not be an > Internet connection. > > -- > Tony Finch <f...@isc.org> (he/they) Cambridge, England > Selsey Bill to Lyme Regis: East or southeast, veering south later, 2 > to 4. Smooth or slight, occasionally moderate for a time offshore. > Fair. Good. > -- > Visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe > from this list > > ISC funds the development of this software with paid support > subscriptions. Contact us at https://www.isc.org/contact/ for more > information. > > > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users >
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