Re: [BEHAVE] proprietary implementation v.s standardisedprotocols//re: draft-xu-behave-nat-state-sync-00

Mark Andrews <marka@isc.org> Tue, 01 December 2009 23:32 UTC

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To: Andrew Sullivan <ajs@shinkuro.com>
From: Mark Andrews <marka@isc.org>
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Subject: Re: [BEHAVE] proprietary implementation v.s standardisedprotocols//re: draft-xu-behave-nat-state-sync-00
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In message <20091201204334.GZ71984@shinkuro.com>, Andrew Sullivan writes:
> On Tue, Dec 01, 2009 at 03:07:11PM -0500, Simon Perreault wrote:
> 
> > The point was that you cannot fail over clients from one Pref64::/n to anot
> her
> > because applications will remember addresses. This is true, to some extent.
>  If
> > it was 100% true then you wouldn't be able to change anything once you publ
> ish a
> > DNS record. In reality, hosts are rebooted, applications are restarted, and
>  web
> > pages are reloaded. So you have some wiggle room.
> 
> "Reloading a web page" often doesn't help.  I have experience of at
> least one popular browser that reaches down and remembers the A record
> for the target host.  Then the magic DNS load balancer decides to pull
> that IP out of the mix, and stuff starts breaking randomly.  (One of
> the many ways in which DNS load balancers don't work the way their
> deployers seem to think they do.)   That said,
> 
> > partial fix is better than just shutting of the Internet to your
> > customers. If it means they have to close Outlook and restart it, so
> > be it.
> 
> I completely agree here.
> 
> A
> 
> -- 
> Andrew Sullivan
> ajs@shinkuro.com
> Shinkuro, Inc.
> _______________________________________________
> Behave mailing list
> Behave@ietf.org
> https://www.ietf.org/mailman/listinfo/behave

getaddrinfo() is designed to be extensible.  Lets exercise that extensiblity.
Resolution methods w/o a TTL get some default value set (0 or 10 mins) or
a flag which says it is not set.

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