On Thu, 17 Oct 2002, Hesham Soliman (EAB) wrote:
>   >    Optimistic DAD is a useful optimization because DAD is far more 
>   >    likely to succeed than fail, by a factor of at least 
>   > 10,000,000,000
>   >    to one[SOTO].  This makes it worth a little disruption 
>   > in the failure
>   >    case to provide faster handovers in the successful case, 
>   > as long as
>   >    the disruption is recoverable.
>   > 
>   > ==> this is totally, and completely wrong.  [SOTO] only 
>   > provide analysis 
>   > in *some* cases, in particular autoconfigured vs privacy 
>   > addresses.  For 
>   > manually assigned addresses, I believe the ratio is closer 
>   > to 1:10 or 
>   > 1:100 (unmeasurable, of course).
> 
> => I think that manually configuring a CoA is not 
> something we should do or talk about in standards.
> So it is probably not important to include it in
> any useful (useable) statistics on the probability 
> of address duplication.

I agree, but the analysis was done on the specific case, not the generic 
case.  The wording is wrong.  The optimistic DAD extensions could be used 
outside of the MIPv6 context too!

-- 
Pekka Savola                 "Tell me of difficulties surmounted,
Netcore Oy                   not those you stumble over and fall"
Systems. Networks. Security.  -- Robert Jordan: A Crown of Swords

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