Hi Ted,

> On Jun 5, 2013, at 10:23 AM, Sander Steffann <[email protected]> wrote:
>> So they playing field is mixed. Some do /56, but the major players do (or 
>> will do) /48.
> 
> Sure, but you're just confirming my point that if a provider wants to do 
> semantic prefixes, they can get enough bits to do them by allocating a /56 to 
> customers instead of a /48.   The point is not to catalog the various choices 
> providers have made, but simply to point out that "bit scarcity" is not a 
> good argument to use against semantic prefixes.   If they are a bad idea, 
> which they may well be, it is for some other reason.

Keep in mind that RIRs won't give you extra address space though. If you assign 
/56s to your users then that is what the RIR need-base calculations are based 
on (according to current policy).

Cheers,
Sander

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