DNS ROOT understanding

[Nicolas Liénard]

> > Is it a round robin ?
> Yes, a modified with weights given to each of them based on RTT. In essen=
> ce
> it will ask 13, but zooming into the "closest" but still now and then
> send occational queries to the othes, in case something changed.
>
> I think you with rndc dumpdb will se this :
> ; D.ROOT-SERVERS.NET [v4 TTL 81357] [v4 success] [v6 unexpected]
> ;       128.8.10.90 [srtt 23212] [flags 00000000]
> ; D.ROOT-SERVERS.NET [v4 TTL 80646] [v4 success] [v6 unexpected]
> ;       128.8.10.90 [srtt 23212] [flags 00000000]
>
>
> ( taken with bind-9.3.0 )
>

Thanks for your quick answear.

If i understand, that means if there is a root server not reacheable, his
RTT will increase and will be less solicited

Is there a good way to monitore the life about Root Server ? (ping ? dig ?
other ?)
in order to be warn when there is a problem.

> Peter H=E5kanson        =20
>
Thanks and regards,
Nicolas Liénard