Re: HOWTO: Join the 6bone!
On Wed, Sep 20, 2000 at 01:07:53AM -0600, Jason Gunthorpe wrote:
> As some of you may know Debian has been getting 6bone feed to it's boxes,
> I've set down and got everything worked out so that every developer may
> now have 6bone access. It is very simple and makes use of the emerging
> 6to4 standard.
Wait a second, in this example u use the sit0 auto feature to address ipv4
packets via ipv4:
> wakko{root}~#ip addr add 2002:186c:d162::1 dev sit0
> wakko{root}~#ip -6 route add 2000::/3 via ::216.234.231.5
in this case you tell your box that every ipv6 packet (2000::/3) should be
send to the ipv6 address with the suffix ::216.234.231.5. This will be
matched by the route which is automatically added by the sit0 device which
basically checks for the first 96bits of a v6 address beeing 0. In that case
it takes the ipv6 packet, wraps it into an ipv4 packet and sends it off to
216.234.231.5. So far so good. But, the sender of this packet is not as you
might simply expect ::24.108.209.98 (which can be handeled pretty well by
masters sit0) but 2002:186c:d162::1. Thats why master hand the answer packet
off to the 6bone as your trace indicates:
> master{jgg}~#traceroute6 2002:186c:d162::1
> traceroute6 to 2002:186c:d162::1 (2002:186c:d162::1) from 3ffe:a00:2:2::35,
> 30 hops max, 16 byte packets
FOGHEAD> 1 3ffe:a00:2:2::34 (3ffe:a00:2:2::34) 67.522 ms * 67.554 ms
VERIO > 2 3ffe:aff:0:10::10 (3ffe:aff:0:10::10) 91.2 ms * 91.518 ms
ISI > 3 3ffe:80a::2 (3ffe:80a::2) 93.03 ms 103.025 ms 94.884 ms
VERIO > 4 3ffe:a00:2:2::a (3ffe:a00:2:2::a) 173.299 ms * 243.009 ms
CISCO > 5 3ffe:c00:e:4::1 (3ffe:c00:e:4::1) 188.693 ms 184.959 ms *
... ipv4 ...
6to4 > 6 2002:186c:d162::1 (2002:186c:d162::1) 218.681 ms 217.939 ms 216.905 ms
so the question is, 3ffe:c00:e:4::1 seems to be ipv6-router.cisco.com which
is obviously doing the 6to4 ipv4 tunneling for your answer packages. Are we
authorized to ue their facility? And if so, why we can't simply use it as
the entry point, too? ipv6-router.cisco.com (192.31.7.104)
Greetings
Bernd
--
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