This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


Re: [Xen-users] IPV4 is nearly depleted, are you ready for IPV6?

To: James Harper <james.harper@xxxxxxxxxxxxxxxx>
Subject: Re: [Xen-users] IPV4 is nearly depleted, are you ready for IPV6?
From: Melody Bliss <melodybliss@xxxxxxxxx>
Date: Sun, 5 Dec 2010 21:13:25 -0800
Cc: rudi@xxxxxxxxxxx, Nathan Eisenberg <nathan@xxxxxxxxxxxxxxxx>, chris <tknchris@xxxxxxxxx>, xen-users <xen-users@xxxxxxxxxxxxxxxxxxx>
Delivery-date: Sun, 05 Dec 2010 21:14:50 -0800
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=1l9c0LGAf1swn4NRAV2qFFGEecbTLU7RuC+4W67KniE=; b=fgAnDewBQqILTk6A9H1nADu8VDRuGeukCN9c4u3te0WRaDkQPciYlHNzxtaNklPo63 DqZRji8XUKG2ZQLMXstPNW6kJnJ/wgYQm7Egouec9zSXQREyAesHUU/oh3g5x+FGRNIo FvzPBJGkl7IKOb7SRzz3o7Y0M2DvxA9qKRWM4=
Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=B+FugCfLO3980tfFWFWmxi9/5SCL3FO55oh4UqEJzs7vzXNFZqCmVvCFEyuQ25a0CZ TCChD05w21c5prK5jtugFUJmEp55imMcgt16v6qX/5zplVXkx3AmeTYvweEZQ4wwoCqE 5JpekolbXL6D4oHJ6t3Zh6aOhskSGIW1GNVZ4=
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <AEC6C66638C05B468B556EA548C1A77D01BB8728@trantor>
List-help: <mailto:xen-users-request@lists.xensource.com?subject=help>
List-id: Xen user discussion <xen-users.lists.xensource.com>
List-post: <mailto:xen-users@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-users>, <mailto:xen-users-request@lists.xensource.com?subject=unsubscribe>
References: <AANLkTikJsOP7_679y1aReZCMWcGpmCgmr8x4wgg09Zz8@xxxxxxxxxxxxxx> <AANLkTinFBy4RYEmaWZFkpCx72e3OzRMqW9me9Mhr0gu-@xxxxxxxxxxxxxx> <8C26A4FDAE599041A13EB499117D3C286B2938E7@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx> <AEC6C66638C05B468B556EA548C1A77D01BB8728@trantor>
Sender: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
I don't now about other flavors of Xen, but the one that comes
natively with CentOS 5.4 does not have IPv6 functionality because
vif-route doesn't support it.

That said, I've successfully been able to use BenV's vif-route patch
to enable IPv6


Since I distribute IPv6 via DHCP, I've been able to successfully get
IPv6 running in my DomUs (CentOS also) by just using that patch. I did
not need to specify the IPv6 address.


On Sun, Dec 5, 2010 at 3:16 PM, James Harper
<james.harper@xxxxxxxxxxxxxxxx> wrote:
>> > I've been hearing this for about 10 years and during that 10 years
>> > have never had a single issue getting ipv4 addresses. While I agree
>> > that it will run out at some point and that ipv6 probably has
>> > advantages over ipv4 I think there is just the appearance of a
>> > shortage due to the allocation of large blocks of ips very early on
>> > which are very under utilized. I don't think its really anything to
>> > worry about especially with ipv6inipv4 working just fine.
>> >
>> > you see this story posted on various "tech" sites every year for a
> long
>> > time
>> This is a fallacy.  The fact that the depletion rate has been common
> knowledge
>> for quite some time doesn't mean, as you would have us believe, that
> there is
>> no issue.
>> IANA depletion day is in 2 months and 5 days.  The first RIR depletion
> is 335
>> days out.  Provider depletions will happen very quickly afterwards.
> You seem
>> to be under the impression that people have been crying wolf.  You're
> wrong.
>> The wolf is at a known distance, and travels at a known (and
> increasing) rate
>> of speed.  Just because you can't see the wolf doesn't mean everyone
> has been
>> wrong this whole time.
>> And no, there aren't 'large blocks of IPs which are very
> underutilized'.
>> There are /8's that can't be broken up for practical reasons, but
> we're
>> burning through those in 30-40 days now, so it doesn't matter if they
> were
>> returned to the pool.
>> This is a very real problem.  Please stop spreading FUD.
> To bring this somewhat on topic, are there any known issues with Xen
> under IPv6? Do all the scripts and other management stuff support it
> correctly or is there still work to be done?
> The Xen hypervisor itself doesn't have a network stack obviously, but
> some of the setup and management tools use it.
> James
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users

Melody Bliss
Usenix, SAGE and LOPSA Charter Member
Patron Member of the NRA

Xen-users mailing list