Re: [DNA] Some questions about Simple DNA

[Hesham Soliman <hesham@elevatemobile.com>]

On 29/04/2008, at 10:36 AM, Bernard Aboba wrote:

> > * Address was configured using SLAAC : Nobody is keeping track of  
> the
> > address used by the node. In this case when the node gets back  
> into the
> > link, it needs to do DAD.
> >
> > Is this an acceptable bifurcation?
>
> Not completely.  If the host is only gone from the link for a small  
> period (e.g. enough to complete a handoff), then I don't see why DAD  
> should be required, since enough time would not have elapsed to  
> allow another host to complete DAD for the same address.
>
> Also, longer absences are similar in the effect of network  
> partitioning and healing, where two hosts can each complete DAD, and  
> therefore come to believe that their addresses are unique.  Yet when  
> their previously partiioned networks are joined, they can discover  
> conflicts.  Therefore the problem of ongoing conflict detection  
> exists in either scenario.

=> Yes but DAD was never intended to address the problem of network  
partitioning/joining. So this problem is outside the scope of DAD.

Hesham