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Michel,

On Apr 24, 2007, at 9:49 PM, Michel Py wrote:
>> The cost of redesignating the class E address space seems very low,
> This is exaggerated; moderately low is the best you can hope; there  
> are
> gazillions of lines of code that needs to be patched. Does not happen
> overnight.

Err, no.

The cost of redesignating class E space is the cost of writing an  
RFC, IANA editing a file, and IANA publishing that file on IANA's web  
site.  While the first bit may cost a bit of stomach lining and  
sanity, I don't think anyone can call the cost anything but very low.

The cost of utilizing class E space will likely be significantly  
higher.  However, if you judge the cost of utilization high, don't  
use it.  That is, "Doctor, it hurts when I do this..."

Rgds,
-drc