[100065] in North American Network Operators' Group
Re: Geographic map of IPv6 availability
daemon@ATHENA.MIT.EDU (Iljitsch van Beijnum)
Mon Oct 15 06:26:43 2007
In-Reply-To: <ECD70626-8EB0-4651-8A3E-51D783571389@daork.net>
Cc: nanog <nanog@merit.edu>
From: Iljitsch van Beijnum <iljitsch@muada.com>
Date: Mon, 15 Oct 2007 12:25:42 +0200
To: Nathan Ward <nanog@daork.net>
Errors-To: owner-nanog@merit.edu
On 15-okt-2007, at 11:50, Nathan Ward wrote:
>> The way I read the portion of the thread related to resolver behavoir
>> was that the resolver behavior was being discussed. Not the client.
>> The resolver should have an attribute to select the preference
>> between
>> A vs. AAAA. Otherwise, it's setting network policy through code.
How is using an address that is present "setting network policy"?
> For those who missed it - OS level address selection policy won't
> apply to BIND without specific code, as BIND is a recursive
> resolver so won't be calling getaddrinfo(3).
(I missed that we were talking about BIND in my previous message, by
the way. Sorry.)
Some quick experimentation suggests that BIND ignores the policy
table and just round robins (or something that looks like it) through
all available addresses. Try some different non-existing hostnames
under kame.net, which has two NS records that both have an IPv4
address and one has one IPv6 address and the other one has two.
