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RE: [DNA] Some questions about Simple DNA

Even if the host is away from the link for only 1 ms, it could miss the DAD as another host might send its DAD probe during this 1 ms period. Is it assumed that the DAD probe is buffered by the network and delivered to the host upon re-attachment?

domagoj


> -----Original Message-----
> From: owner-dna@ecselists.eng.monash.edu.au 
> [mailto:owner-dna@ecselists.eng.monash.edu.au] On Behalf Of 
> Bernard Aboba
> Sent: 30. travanj 2008 02:55
> To: 'Suresh Krishnan'
> Cc: dna@eng.monash.edu.au
> Subject: RE: [DNA] Some questions about Simple DNA
> 
> >In order to do this we need to keep track of how long the 
> host has been 
> >gone from the link. And since the DAD transmits and timeouts 
> are based 
> >on host specific configuration, it might be very hard to 
> come up with a 
> >decent borderline number on the amount of time elapsed away from the 
> >link when the host needs to start doing DAD.
> 
> This could be accomplished by tracking the time that has 
> elapsed since receipt of a "link down" indication.  This 
> could be included with the configuration data associated with 
> a given router. 
> 
> That way, when the reachability test completes, the host 
> would check the elapsed time since "link down" against a 
> host-configured parameter in order to decide whether to do 
> Optimistic DAD. 
> 
> 
> 
>