Re: [DNA-BOF] Do we need a separate DAD Problem Statement? (was Re:About Charter, DAD, and SEND)

[Youn-Hee Han <yhhan@sait.samsung.co.kr>]

Hi Greg,

Greg wrote:
> I agree that it is important to be able to do DAD (optimized)
> before DNA has occurred. Maybe we need to say:
> 
> "3.N+1  Simultaneous operation with DNA
> 
>   It SHOULD be possible to use DAD optimization procedures
>   to ensure availability of link-local addresses before DNA
>   has been completed.  This would allow DNA procedures to
>   be undertaken without needing to wait for [RFC-2462] style
>   DAD completion."
> 
> I think this separates the optimism (which may provide a solution)
> from the goal.

Does "DAD optimization" include the validity check of previous 
IP address on a new link? IMO, we had better confine "DAD 
optimization" only to the matter reducing the delay time.

We should not be confused between "the validity check of
previous IP address on new link" and "the reduction of 
delay incurred by duplicate address detection", although the
two schemes help send and receive packets immediately after
network attachment.

Best Regards,
Youn-Hee Han