[DNA] Re: when to rerun DAD

[JinHyeock Choi <jinchoe@gmail.com>]

Thomas

> > It may cause address conflict if a host continues to use the existing
> > 'IP address' without DAD. While the host is away from the link, it's
> > possible that another node happens to configure the host's IP address,
> > because there was nobody to defend the address.
>
> IMO, we may want to think about having a separate discussion about
> "when to run DAD". The blanket "rerun DAD at all times there is some
> doubt" strikes me as overkill.

ok.

> For example, why rerun DAD if one has
> been disconnected only 10 seconds? or 30? Maybe we should if we've
> been disconnected for an hour (but then, do we need to bother with
> DNA?).

ok but we need to measure actual detachment time with some precision,
which may be complicated. For example, exactly when an L2 link is
becoming down? In 802.11 case, upon completing association procedure,
we can say that an L2 link is up. But a wireless link can be down
without any formal procedure (such as de-association) because of
deteriorating channel condition.

Thanks for your kind consideration.

Best Regards

JinHyeock