So... is it time to do IPv6 day monthy yet?

Mark Andrews marka at
Sat Jun 18 09:31:44 UTC 2011

In message <E1F85FB9-7E52-4CE9-B5A9-C9AC0DA01A1C at>, Owen DeLong write
> On Jun 17, 2011, at 6:11 PM, Mark Andrews wrote:
> >=20
> > In message <BANLkTi=3DDGwuN_9xnBzq-ukdKxeYnuQ16Bw at>, =
> Michael Dillon writes:
> >>> The last v6day was an isoc effort, there can be a separate nanog =
> effort or
> >>> your own.
> >>=20
> >> It does make a lot of sense for NANOG (perhaps jointly with RIPE and
> >> other NOGs) to organize monthly IPv6 days with a theme or focus for
> >> each month. If you have a focus, then you can recruit a lot of IPv6
> >> testers to try out certain things on IPv6 day and get a more thorough
> >> test and more feedback
> >>=20
> >> Skip July and August because it takes time to get this organized, and
> >> then start the next one on September the 8th or thereabouts.
> >>=20
> >> For instance, one month could focus on full IPv6 DNS support, but
> >> maybe not right away. A nice easy start would be to deal with IPv6
> >> peering and weird paths that result from tunnels. That is the kind of
> >> thing that would work good with a lot of testers participating and an
> >> application that traces IPv4 and IPv6 paths and measures hop count,
> >> latency, packet loss.
> >>=20
> >> In conjunction with the monthly IPv6 day, NANOG should set up a blog
> >> page or similar to publicly collect incident reports and solutions.
> >=20
> > I really don't know why anyone is worried about advertising AAAA
> > records for authoritative nameservers.  It just works.  Recursive
> > nameservers have been dealing with authoritative nameservers having
> > IPv6 addresses for well over a decade now.  This includes dealing
> > with them being unreachable.
> >=20
> > DNS/UDP is not like HTTP/TCP.  You don't have connect timeouts to
> > worry about.  Recursive nameservers have much shorter timeouts as
> > they need to deal with IPv4 nameservers not being reachable.  They
> > also have to do all this re-trying within 3 or so seconds or else
> > the stub clients will have timed out.
> >=20
> Ah, but, with IPv6 records, you are much more likely to end up with
> a TRUNC result and a TCP query than with IPv4.

Not really.  A AAAA record adds 28 octets (a A record takes 16).  Unless
you have a lot of name servers most referrals still fall within 512 octets
additionally most answers also still fall withing 512 octets.

Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka at

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