Re: [Softwires] WG Review: Recharter of Softwires (softwire)

["Jan Zorz @ go6.si" <[e-mail]>]

On 4/25/11 11:14 AM, Satoru Matsushima wrote:
> I'm very confused to understand what DS-Lite is.
>
> On 2011/04/21, at 10:22, Yong Cui wrote:
>
>> Change "DS-Lite with no NAT or NAT on the B4 element" to "No NAT on AFTR"
>
> However, "draft-ietf-softwire-dual-stack-lite-07" clearly express AFTR is carrier grade NAT44,
> and B4(CPE) should not operate a NAT function. So my question is what does the DS-Lite function deployment model include.
> Current DS-Lite definition does not accept any extension for "DS-Lite with no NAT or NAT on the B4 element" to "No NAT on AFTR".
> I think that to do this as a charter item, we need definition change of DS-Lite, or use another terminology instead of DS-Lite.

"DS-Lite with no NAT or NAT on the B4 element" or "No NAT on AFTR" are 
fancy new names for A+P.

A+P was defined in DS-Lite as possible way of doing it some versions ago 
but disappeared through the time.

No idea why, but anyway. Basically DS-Lite and A+P are similar 
mechanisms with NAT at different places. See ymbk-aplusp draft, section 
"Overall architecture".

Cheers, Jan Zorz