RE: dual stack & IPv6 on by default

["Bound, Jim" <Jim.Bound@hp.com>]

Hi Mika,

>An implementation can't really know that a destination address 
>is unreachable, unless it does a route search and, failing to 
>find one, proceeds to try to ND all routerless links as well. 
>Is that what we should do?

I think today this is the bottom line only answer.

But your mail thread makes me wonder if we need to do more and I think
so.

But it would have to be in the context of ND.  ND is a requirement to
use IPv6.

Feels like an edge that could be "do this if ND don't work"?

Thanks
/jim