Re: [v6ops] Draft on DC migration to IPv6

["Diego R. Lopez" <[e-mail]>]

Hi Arturo,

On 26 Jun 2012, at 21:25 , Arturo Servin wrote:
>       The maturity level 1 is a bit odd to me. Do you mean that it is common to DC to translate all the traffic from v4 to v6 in the border? I am misunderstanding something?

The maturity level 1 corresponds to a datacenter in which all traffic it is v4-based,
and translation from and to the v6 Internet is provided at the border. Our take is
that this is the most common case nowadays.

>       Shouldn't be a dual stack network (with servers and services in v4) a maturity level 0.5 or 1.5?

If you have dual stack inside the datacenter fabric, you are at maturity level 2.

>       I think also that there are some common scenarios not explored here, for example some native dual stack servers and services combined with single stack services (web server in DS + database server in v4 only).

As said in the introduction, the document concentrates in how is v6 applied in
the datacenter infrastructure, and the implications and features that this
application has. A scenario like the one you describe would only be possible in
maturity level 2.

It is true that we have not considered the different possibilities with respect
to server and services that maturity levels have. We will update the draft
including these considerations. Thanks for noting it.

>       The maturity level 3 I think that you need to add that a single stack network is much simple to manage than a dual stack one. IMHO that will be the killer app for an IPv6 only DC.

Agreed, provided that the v6 traffic grows up to a certain level and/or vendor
solutions cover your needs for the supporting datacenter fabric to be reliable to
the operator. Note that the argument of a simple stack network being easier to
manage is equally applicable to level 1. I think this is worth to be mentioned
in the text as well.

>       Also, take a look at draft-ietf-v6ops-icp-guidance, there is some content that it is already there.

Will do. Thanls for the pointer.

Be goode,

--
"Esta vez no fallaremos, Doctor Infierno"

Dr Diego R. Lopez
Telefonica I+D
http://people.tid.es/diego.lopez/

e-mail: [e-mail]
Tel:    [phone]
Mobile: [phone]
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