Re: DAD failure for global IPv6 addresses?

> Routing and forwarding decisions are completely independent of what
> addresses are configured on the interface. Contrary to IPv4 behavior,
> the configuration of an address using P::/64 prefix does not
> automatically add a route to the P::/64 prefix. What prefixes are
> on-link is determined by
> 
> a) on a router - by configuration
> b) on a host - by information contained in the RAs

It may be sacrilege to mention it in this group - but b) here is
certainly not the only view of how things work (or for that matter
how they *should* work). For instance - FreeBSD 7.x needs explicit
configuration to turn on IPv6. If IPv6 is turned on, you can configure
a static IPv6 address (for instance a /64 prefix) for an interface -
and this will indeed add a route to this /64 network. Or you can use
various types of autoconfiguration.

Steinar Haug, Nethelp consulting, sthaug <at> nethelp.no
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