RE: [DNA] Comments on draft-shim-dna-proactive-00.txt

[Zhigao Chen <zgchen@psl.com.sg>]

Hi Alper,

My comments are inline.

> > That may mean a single pair of messages direct to that 
> router, but I'd 
> > guess that this is fairly fast if the configuration was correct (a 
> > likely case).
> 
> If a hint is a weak hint, and it requires that a reachability 
> test be performed, how useful is that hint? When there is no 

If a host is able to suspect it remains on the same link from the
receipt of the hint (one way is to have the APID Cache we proposed in
place), it can just perform reachability test without a need to do DAD
on the tentative address, which normally takes longer. Note that if the
router is found reachabile, the host could even reuse other addresses
used on the link. In other words, no DAD for individual addresses is
needed.
  
> hint, at most what a host would need to do is the same: send 
> a multicast RS. 
>

In the absence of a hint, the sending of the multicast RS is a problem
might not be triggered so fast.

Zhigao