[Openstack] OpenStack and its brilliant future with IPv6 and, we don't need...

Martinx - ジェームズ thiagocmartinsc at gmail.com
Thu Aug 8 23:04:40 UTC 2013

Thank you guys for your answers!

On 8 August 2013 18:31, Robert Collins <robertc at robertcollins.net> wrote:

> On 9 August 2013 07:51, Martinx - ジェームズ <thiagocmartinsc at gmail.com> wrote:
> > 1- NAT;
> There's no /need/ for it in IP4 in a lot of environments. Only public
> cloud providers really need to do NAT in IP4.

Mostly because of IPv4 exhaustion, RackSpace Public Cloud ISP give to me,
public IPv4 within my cloud...

AWS/EC2 now focus on "VPCs" (IPv4 "private") networks but, I'm seeing this
act more or less like "milking a dead cow (IPv4)"...

> > 2- Floating IPs;
> Implemented via NAT, but not about NAT: they are about being able to
> move endpoints instantly without dns cache issues - an HA tool, and a
> well-known-address tool. The implementation is changable but the
> concept is valuable in IPv6 too IMNSHO.

Mmm... Okay, I understand it a bit better now... I'll research a bit more
about it...   =)

Anyway, I would like to be able to live without it... If possible / not too
much trouble (for OpenStack devel team) to be able to disable it with a

> > 3- Use of Namespaces.
> I don't see how this is related : with SDN someone can define the same
> IPv6 range in two tenants, so namespaces are still needed.

Are you saying that is this:

* give to Tenant A (namespace X), the IPv6 block: 2001:1291:200:83f6::/64

* give to Tenant B (namespace Y), the same IPv6 block:


Sounds cool! I'll take a deep look into SDN...


Thanks for clarifying it for me!


> --
> Robert Collins <rbtcollins at hp.com>
> Distinguished Technologist
> HP Converged Cloud
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