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SubjectRe: 2.4.21+ - IPv6 over IPv4 tunneling b0rked
On 11 Jul 2003, Mika Liljeberg wrote:
> Here's a valid use for subnet router anycase that isn't working.
> Somebody asked me how to set up 6to4, so I did a little testing.
>
> Doesn't work:
>
> hades:~# ip route add ::/0 via 2002:c058:6301::
> RTNETLINK answers: Invalid argument
>
> Works:
>
> hades:~# ip route add ::/0 via 2002:c058:6301::1
>
> Unfortunately the first form is what I need:
>
> hades:~# host -t AAAA 6to4.ipv6.funet.fi
> 6to4.ipv6.funet.fi has AAAA address 2001:708:0:1::624
> 6to4.ipv6.funet.fi has AAAA address 2002:c058:6301::

I think that in this particular case, if should have configured your
interface address with 2002:v4:addr::/16, of which subnet anycast router
address would be 2002::.

> So apparently there really is an inappropriate subnet router anycast
> sanity check. Please fix this!

This *may* be caused by another issue too: nexthop's must be given in the
compatible "::192.88.99.1" format, not 2002:xxxx :-(
I sent a patch on over a year or so ago, but it didn't gain that much
enthusiasm..

--
Pekka Savola "You each name yourselves king, yet the
Netcore Oy kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings

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