Wojciech,

> You're apparently missing some key points: 

that's not uncommon. ;-)

> 1.  It's a functional requirement of a CPE, specifying how the CPE behaves 
> with a case of NOT having an IPv4 address. What is the to be the bahviour of 
> a MAP CPE without one?

just like if it didn't get an IPv4 address on native Ethernet.

> 2.  This is NOT about configuring a ds-lite CPE

my understanding was that the CPE had to be provisioned for this mode,
possibly as a separate MAP domain. and that the BR must also act as a CGN.

> Throughout, its still not been answered what is the downside of having this 
> functionality of a *MAP CPE*?

it adds yet another variant.
what's wrong with provisioning the DS-lite option when you want this behaviour?
or if you want overflow from MAP to DS-lite?

I don't get the benefit of what you are suggesting.

cheers,
Ole

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