Re: Repotting report

[Mark Andrews <Mark_Andrews () isc org>]

> On Feb 6, 2008 12:11 AM, Mark Andrews <Mark_Andrews () isc org> wrote:
> > > (from me)
> > > How does a cache-resolver know that it's time to issue a query with edns0?
> >
> >         cache-resolver that support EDNS0 will make EDNS0 queries
> >         by default.  They will fallback to plain DNS if the query
> >         fails or they get a response that indicated the authoritative
> >         server doesn't support EDNS.
> >
> >         BIND's been making EDNS0 queries for ~8 years now. If your
> >         cache-resolver doesn't support EDNS it is long past time to
> >         upgrade.
>
> excellent, thanks! (as always). Any thoughts on the possible lack of
> resilence from losing 9 server names/ips in the v4 to v6 move? (and I
> realize that later most/all root boxes will have both addresses)

        It won't be a issue.

        IPv6 capable nameservers are supposed to use EDNS (see IPv6
        node requirements).  The roots can be tuned to preference
        A vs AAAA records.  Most/all currently maintained caching
        servers support EDNS now or the next release will support
        EDNS.

        Mark
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark_Andrews () isc org