[109501] in North American Network Operators' Group
Re: IPv6 routing /48s
daemon@ATHENA.MIT.EDU (Mark Andrews)
Tue Nov 25 20:57:49 2008
To: nanog@nanog.org
From: Mark Andrews <Mark_Andrews@isc.org>
Mail-Followup-To: nanog@nanog.org
In-reply-to: Your message of "Wed, 26 Nov 2008 02:23:26 BST."
<20081126012326.GR78345@burnout.tpb.net>
Date: Wed, 26 Nov 2008 12:57:21 +1100
Errors-To: nanog-bounces@nanog.org
In message <20081126012326.GR78345@burnout.tpb.net>, Niels Bakker writes:
> * Mark_Andrews@isc.org (Mark Andrews) [Wed 26 Nov 2008, 01:55 CET]:
> > In message <20081126002425.GO78345@burnout.tpb.net>, Niels Bakker writes:
> >> * alh-ietf@tndh.net (Tony Hain) [Wed 26 Nov 2008, 01:03 CET]:
> >>> In any case, content providers can avoid the confusion if they simply put
> up
> >>> a local 6to4 router alongside their 2001:: prefix, and populate DNS with
> >>> both. Longest match will cause 2001:: connected systems to chose that dst
> ,
> >>> while 6to4 connected systems will chose 2002:: as the dst. There is no ne
> ed
> >> Huh? Longest match done by web browsers and other applications? Since
> >> when?
> > FreeBSD 6 has is as part of the standard getaddrinfo() implementation.
>
> I don't see that do any differentiation between 2001::/32, 2002::/16
> and 2000::/8; only between IPv6-mapped IPv4 addresses and various
> interface/link/site-local addresses. And even that function has a big
> * XXX: we should standardize the functions and link them as standard
> * library.
> warning stuck on top of it
2002::/16 vs non 2002::/16 should be in the policy table.
This is the default prefer ipv6 policy table for FreeBSD
6.4-PRERELEASE. There is also a alternate prefer ipv4 policy
table that will be set if IPv6 is disabled.
Prefix Prec Label Use
::1/128 50 0 0
::/0 40 1 4997
2002::/16 30 2 0
::/96 20 3 0
::ffff:0.0.0.0/96 10 4 0
Mark
> -- Niels.
--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: Mark_Andrews@isc.org
