Re: [Softwires] [armd] Fwd: I-D Action: draft-sakura-6rd-datacenter-03.txt

[Shishio Tsuchiya <[e-mail]>]

Linda
Thanks for comments.

(2012/02/10 8:26), Linda Dunbar wrote:
> Shishio,
> 
> Thank you very much for sharing the v6 deployment in data center.
> 
> I am not an IPv6 expert. So I have a simple question: when you say "server-based 6rd", do you mean that server does the IPv4 encapsulation?

Yes.
6rd is IPv6 over IPv4 tunnel technology.
So backbone operator does not need to care to IPv6 on the core.
Additionally 6rd has stateless feature.
Once the operator has placed/configured 6rd BR on the exit point to the IPv6 internet,does not need additional operation to add 6rd CE(server based 6rd).
And if the server would like to go  to the IPv6 internet,then IPv4 packets will through 6rd BR and de-capsulate.
If the server would like to communicate other 6rd server within the data center,then IPv4 packets will reach 6rd server directly and de-capsulate.

> 
> 
> Does your data center allow hosts/servers under one IPv6 subnet (e.g. /64) to be placed under different server racks?

In Sakura internet 6rd cases,each of 6rd server has one 6rd delegate prefix(/64).
http://tools.ietf.org/html/draft-sakura-6rd-datacenter-03#section-4.1

The 6rd delegate prefix calculates from Sakura's IPv6 prefix(/32) and IPv4 address.
Sakura has the scalability problem which is same as ARMD draft.
http://tools.ietf.org/html/draft-ietf-armd-problem-statement-00

They also had to update switches to resolve security issue(Rogue RA).
http://tools.ietf.org/html/rfc6104

They selected "server-based 6rd" as the solution to avoid scalability and security problem.

Regards,
-Shishio


> 
> Thanks, Linda Dunbar
> 
> 
> 
> 
> 
> On Tue, Feb 7, 2012 at 11:16 PM, Shishio Tsuchiya <[e-mail] <mailto:[e-mail]>> wrote:
> 
>     v6ops and ARMD
>     Sakura internet are providing IPv6 service without scalability impact to core network equipment to customer using 6rd.
>     We thought this is interesting idea,so published the draft.
> 
>     http://tools.ietf.org/html/draft-sakura-6rd-datacenter-03
> 
>     I think both of mailing list participants are also interesting in this technique.
>     If you have any comment and question of the draft,please let me know.
> 
>     Regards,
>     -Shishio
>     -------- Original Message --------
>     Subject:        I-D Action: draft-sakura-6rd-datacenter-03.txt
>     Date:   Mon, 14 Nov 2011 17:21:26 +0800
>     From: <[e-mail] <mailto:[e-mail]>>
>     Reply-To: <[e-mail] <mailto:[e-mail]>>
>     To: <[e-mail] <mailto:[e-mail]>>
> 
> 
> 
>     A New Internet-Draft is available from the on-line Internet-Drafts directories.
> 
>     Title : IPv6 Rapid Deployment (6rd) in a Large Data Center
>     Author(s) : Shishio Tsuchiya
>     Mark Townsley
>     Shuichi Ohkubo
>     Filename : draft-sakura-6rd-datacenter-03.txt
>     Pages : 15
>     Date : 2011-11-14
> 
>     IPv6 Rapid Deployment (6rd) as defined in RFC 5969 focuses on rapid
>     deployment of IPv6 by an access service provider which has difficulty
>     deploying native IPv6. This document describes how 6rd can be used
>     to deliver IPv6 within a Large Data Center.
> 
> 
>     A URL for this Internet-Draft is:
>     http://www.ietf.org/internet-drafts/draft-sakura-6rd-datacenter-03.txt
> 
>     Internet-Drafts are also available by anonymous FTP at:
>     ftp://ftp.ietf.org/internet-drafts/
> 
>     This Internet-Draft can be retrieved at:
>     ftp://ftp.ietf.org/internet-drafts/draft-sakura-6rd-datacenter-03.txt
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