IETF Logo Mail Archive

Re: Multihoming Issues

Valdis.Kletnieks@vt.edu Fri, 30 August 2002 18:18 UTC

Received: from loki.ietf.org (loki [10.27.2.29]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id OAA29016; Fri, 30 Aug 2002 14:18:52 -0400 (EDT)
Received: (from adm@localhost) by loki.ietf.org (8.9.1b+Sun/8.9.1) id OAA07961 for ietf-outbound.09@loki.ietf.org; Fri, 30 Aug 2002 14:00:01 -0400 (EDT)
Received: from ietf.org (odin.ietf.org [10.27.2.28]) by loki.ietf.org (8.9.1b+Sun/8.9.1) with ESMTP id NAA07866 for <ietf-mainout@loki.ietf.org>; Fri, 30 Aug 2002 13:53:27 -0400 (EDT)
Received: by ietf.org (8.9.1a/8.9.1a) id NAA27857 for ietf-mainout@loki.ietf.org; Fri, 30 Aug 2002 13:51:53 -0400 (EDT)
X-Authentication-Warning: ietf.org: majordom set sender to owner-ietf@ietf.org using -f
Received: from turing-police.cc.vt.edu (turing-police.cc.vt.edu [198.82.160.121]) by ietf.org (8.9.1a/8.9.1a) with ESMTP id NAA27831; Fri, 30 Aug 2002 13:51:31 -0400 (EDT)
From: Valdis.Kletnieks@vt.edu
Received: from turing-police.cc.vt.edu (localhost [127.0.0.1]) by turing-police.cc.vt.edu (8.12.5/8.12.5) with ESMTP id g7UHqPQu006583; Fri, 30 Aug 2002 13:52:26 -0400
Message-Id: <200208301752.g7UHqPQu006583@turing-police.cc.vt.edu>
X-Mailer: exmh version 2.5 07/13/2001 with nmh-1.0.4+dev
To: Sister Sibling <ccs522g9@yahoo.com>
Cc: ietf@ietf.org, iesg@ietf.org
Subject: Re: Multihoming Issues
In-Reply-To: Your message of "Thu, 29 Aug 2002 19:16:21 PDT." <20020830021621.91892.qmail@web12401.mail.yahoo.com>
X-Url: http://black-ice.cc.vt.edu/~valdis/
X-Face-Viewer: See ftp://cs.indiana.edu/pub/faces/index.html to decode picture
X-Face: 34C9$Ewd2zeX+\!i1BA\j{ex+$/V'JBG#; 3_noWWYPa"|,I#`R"{n@w>#:{)FXyiAS7(8t( ^*w5O*!8O9YTe[r{e%7(yVRb|qxsRYw`7J!`AM}m_SHaj}f8eb@d^L>BrX7iO[<!v4-0bVIpaxF#-) %9#a9h6JXI|T|8o6t\V?kGl]Q!1V]GtNliUtz:3},0"hkPeBuu%E,j(:\iOX-P,t7lRR#
References: <20020830021621.91892.qmail@web12401.mail.yahoo.com>
Mime-Version: 1.0
Content-Type: multipart/signed; boundary="==_Exmh_-1007021628P"; micalg="pgp-sha1"; protocol="application/pgp-signature"
Content-Transfer-Encoding: 7bit
Date: Fri, 30 Aug 2002 13:52:25 -0400
Sender: owner-ietf@ietf.org
Precedence: bulk
X-Loop: ietf@ietf.org

On Thu, 29 Aug 2002 19:16:21 PDT, Sister Sibling <ccs522g9@yahoo.com>  said:

>      The IETF is recommending that the DNS mechanisms to support IPv6 stay
> essentially the same as those already in use with IPv4 today. To our opinion,
> in the realm of multi-homed networks, the techniques used in IPv4 can't all be
> applied since they have scaling problems. Specifically, if the same prefix is
> advertised by multiple ISPs, the routing tables will grow as a function of the
> number of multihomed sites.

> Please advise and thanks in advance for your attention.

DNS has nothing to do with routing.  Yes, IPv4 and IPv6 both have issues with
large numbers of multihomed sites, but that's not a DNS issue.

The problem with routing is (to summarize *greatly*) basically that there are
no really good algorithms for finding a new minimum spanning tree in a graph
when an arbitrary change in the graph is made.  The IETF recommendation is to
use the same schemes because we don't have a better method than BGP.  If you
have a better algorithm that scales well to the number of AS and inter-AS
connections that the Internet has, let us know...

-- 
				Valdis Kletnieks
				Computer Systems Senior Engineer
				Virginia Tech

v2.23.0 | Report a Bug | By Email