IPv6 routing help?

[Max Laier]

On Thursday 18 December 2008 23:08:12 Ivan Voras wrote:
> Steve Bertrand wrote:
> > Ivan Voras wrote:
> >> As far as I understand ipv6 (very little), this basically says the
> >> router told the client it can't send packets to outside addresses with
> >> source addresses that are link-local. Is this correct?
> >
> > I don't know much about 6to4. All of my IPv6 is native, but what you are
> > saying appears correct.
> >
> > It is almost like a translation at the router should be happening, but
> > it is not.
>
> Yes.

No!  IPv6 gets rid of all the translation madness!

> >> However, adding an ipv6 address to the client, in this case
> >> 2002:xxyy:xxyy::10/64 doesn't help and breaks even pinging the router's
> >> external address. It looks to me like I'm missing something important in
> >> the relation between the link-local and the global addresses, but what?
> >
> > In this case, you are implementing the same IP prefix on both sides of
> > the router, which won't work.
>
> I don't follow you - is something significantly different than ipv4?

What you need to do is something like the following:

On the interface you are running rtadvd you need a global address out of your 
stf prefix, e.g. 2002:aabb:ccdd:1::/64.  Once you do that, everything else 
should just fall into place.  The client will configure an address out of that 
prefix and adds a route via 2002:aabb:ccdd:1::/64.  This should get you going.

> > Try to ping6 www.freebsd.org from the router itself. If that works, the
> > issue is most certainly the router. If this is the case, hopefully
> > someone with more 6to4 experience can explain why your router is not
> > doing the expected thing.
>
> IPv6 from and to the "router" (it's actually an ordinary machine doing
> lots of stuff) works for all purposes.

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