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Re: [Softwires] MAP compatibility with DS-Lite

Ole Troan <ot@cisco.com> Wed, 20 November 2013 21:32 UTC

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From: Ole Troan <ot@cisco.com>
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Date: Wed, 20 Nov 2013 22:32:23 +0100
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To: Simon Perreault <simon.perreault@viagenie.ca>
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Cc: "softwires@ietf.org" <softwires@ietf.org>
Subject: Re: [Softwires] MAP compatibility with DS-Lite
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Simon,

> draft-ietf-softwire-map-08 contains this:
> 
> 7.3. Backwards compatibility
> 
>   A MAP-E CE provisioned with only the IPv6 address of the BR, and with
>   no IPv4 address and port range configured by other means, MUST
>   disable its NAT44 functionality.  This characteristic makes a MAP CE
>   compatible with DS-Lite [RFC6333] AFTRs, whose addresses are
>   configured as the MAP BR.
> 
> In view of the recent discussions on provisioning, this functionality strikes me as useless. There would be no reason for an ISP to use such provisioning. A unified CPE would just do DS-Lite if that's what's available.
> 
> I suggest to remove that section.

I tend to agree with that.

cheers,
Ole

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