[6bone] Problems with routing from 6to4?

[Simon Leinen]

Nick,

the meta-answer is that DNS is your friend - you should use a
traceroute that resolves IPv6 addresses into hostnames.
It really makes debugging easier!

On Tue, 10 Sep 2002 16:05:16 -0700, Nick Sayer <nsayer@quack.kfu.com> said:
> When I try and get home from a 6to4 site, I get this...

> Tracing route to quack.kfu.com [3ffe:1200:301b:0:2d0:b7ff:febe:e2a8]
> from 2002:[blah blah] over a maximum of 30 hops:

>   1       <1 ms    <1 ms    <1 ms  2002:[blah blah]
>   2      216 ms   219 ms   218 ms  2001:620:0:38::2

That's "swi6T1-T22.switch.ch", so you seem to be using us (SWITCH) as
the (anycast) 6to4 relay.

>   3      279 ms   210 ms   203 ms  3ffe:4006:0:3::11
                                     ^^^^^^^^^^^^^^^^^
That's "freestone-upctech.tun.ipv6.as8758.net"

>   4      209 ms   218 ms   206 ms  3ffe:4005:0:1::15

That's "london1-manchester1-gw.ipv6.kewlio.net"

>   5      234 ms   224 ms   228 ms  3ffe:4005:0:1::17

That's "london1-manchester2-gw.ipv6.kewlio.net"

>   6     3ffe:4005:0:1::17 reports: No route to destination.

> Trace complete.

> I find no whois data for 3ffe:4005.

I don't know the root of the problem, but apparently KEWLIO announced
3ffe:1200::/24 to AS8758 and AS8758 announced it on to us, but when
your packets got to KEWLIO, they were dropped.  Maybe KEWLIO expects
to have a more specific route to you, or their tunnel to DIGITAL-CA
(your pTLA) had a problem.

Right now we do have a good route to DIGITAL-CA and to you:

$ traceroute 3ffe:1200:301b:0:2d0:b7ff:febe:e2a8
traceroute: Warning: Multiple interfaces found; using 3ffe:2000:0:4:a00:20ff:fea2:f7f @ hme0:3
traceroute to 3ffe:1200:301b:0:2d0:b7ff:febe:e2a8, 30 hops max, 60 byte packets
 1  swiCS1-F2-0-0.ipv6.switch.ch (3ffe:2000:0:4:2e0:8fff:fe6e:7c40)  1.341 ms  1.368 ms  0.985 ms
 2  swi6T1-F0-1.switch.ch (2001:620:0:20::6)  1.794 ms  3.428 ms  1.519 ms
 3  chello-swi6T1.ipv6.switch.ch (3ffe:2000:0:40f::1aae)  49.611 ms  51.774 ms  61.456 ms
 4  chello-gw1.ipv6.edisontel.it (2001:730::1:f)  83.878 ms  83.952 ms  83.117 ms
 5  digital-ca-tunnel.ipv6.cisco.com (3ffe:c00:8023:13::2)  233.502 ms  233.787 ms *
 6  quack.kfu.com (3ffe:1200:301b:0:2d0:b7ff:febe:e2a8)  266.017 ms  259.967 ms  261.368 ms

Does the route from 6to4 work for you now?
-- 
Simon.