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Re: [Softwires] Comments on draft-ietf-softwire-map-deployment-01

"Roberta Maglione (robmgl)" <robmgl@cisco.com> Mon, 15 July 2013 12:53 UTC

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From: "Roberta Maglione (robmgl)" <robmgl@cisco.com>
To: Qi Sun <sunqi.csnet.thu@gmail.com>
Thread-Topic: [Softwires] Comments on draft-ietf-softwire-map-deployment-01
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Date: Mon, 15 Jul 2013 12:53:09 +0000
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Cc: Softwires <softwires@ietf.org>
Subject: Re: [Softwires] Comments on draft-ietf-softwire-map-deployment-01
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Hi Qi,
Thanks for the clarifications.
I still think that having a DMR option for MAP would more clear, but if the WG has decided to re-use the DS-Lite AFTR Name option I’m ok with that as long as it is used as designed.
Regards
Roberta

From: Qi Sun [mailto:sunqi.csnet.thu@gmail.com]
Sent: Sunday, July 14, 2013 9:19 PM
To: Roberta Maglione (robmgl)
Cc: Softwires
Subject: Re: [Softwires] Comments on draft-ietf-softwire-map-deployment-01


Dear Roberta,

The DS-Lite ATFR Name option defined in RFC 6334 is used to carry a fully qualified domain name of the AFTR not an IPv6 address.
There was a proposal and a long discussion on the dhc working group about to be able to use the same option to provision either  the name or the address but the wg did not reach consensus on that idea.  So in my understanding you cannot carry an IPv6 address into the DS-Lite AFTR Name option

[Qi] Sorry for not expressing it correctly. My intension was that the DS-Lite AFTR Name option could be used to tell the CE the BR's IPv6 info. The option should be used as it is designed. I didn't try to change that.

it would sound confusing in my opinion, using a DS-Lite specific option to provision MAP specific parameters.

[Qi] In the Unified CPE draft, it using the  DS-Lite AFTR Name option to provision the IPv6 info of BR. The map dhcp draft is going to remove the DMR option. So I think these drafts should be aligned.

Best Regards,
Qi Sun

On 2013-7-15, at 上午7:40, Roberta Maglione (robmgl) wrote:


Hi Qu,
A comment on point 2:
>2. Currently, there is no DMR in MAP-E. The IPv6 address of the BR could be
> provisioned by the DS-Lite AFTR Name option.

The DS-Lite ATFR Name option defined in RFC 6334 is used to carry a fully qualified domain name of the AFTR not an IPv6 address.
There was a proposal and a long discussion on the dhc working group about to be able to use the same option to provision either  the name or the address but the wg did not reach consensus on that idea.  So in my understanding you cannot carry an IPv6 address into the DS-Lite AFTR Name option.
In addition even if you could, it would sound confusing in my opinion, using a DS-Lite specific option to provision MAP specific parameters.

Thanks
Regards
Roberta

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