A possible routing loop...

[Romano Piccio-Marchetti Prado]

	Hello all:

	I don`t know if this is the appropriate mailing list, so if not,
please redirect me to that one.

	We had a tunnel setup and running, and we were able to connect
well with other 6Bone sites. A few days ago, sites began not to respond,
so this evening, I've made a traceroute form CSELT's Web Page to our site.
I include the results below.

	It seems like some routers are looping the traffic directed to us
(in fact, to all the sites that hangs of REDIRIS, our tunnel provider).
Could anyone tell what's the way to solve that?

TRACEROUTE RESULTS ------------------------------------------------------

Traceroute from carmen.ipv6.cselt.it to 3ffe:3328:4::1

Wed Oct 20 17:16:58 MET DST 1999 

datalen = 60
traceroute6 to 3ffe:3328:4::1 (3ffe:3328:4::1), 30 hops max
outgoing MTU = 60
 1  6bone-gw1.ipv6.cselt.it (3ffe:1001:1:100:2e0:1eff:fe8e:c2ca)  1 ms *  1 ms
 2  cselt-if.6r1.doc.london.ip6.pipex.net (3ffe:1100:0:c02::1)  173 ms  155 ms
*
 3  * doc-6r1-if.6r1.paloalto.ip6.pipex.net (2001:600:4:4::2)  381 ms  372 ms
 4  * vbns-uunet-uk.hay.vbns.net (3ffe:1100:0:cc08::2)  501 ms *
 5  * * *
 6  * * *
 7  * * *
 8  3ffe:700:20:1::2 (3ffe:700:20:1::2)  551 ms *  534 ms
 9  6b-att-ch.ipv6.imag.fr (3ffe:302:11:2:0:2:0:11)  715 ms *  743 ms
10  exchange.telehouse.ipv6.ja.net (3ffe:1100:0:410:200:cff:fe7e:f979)  683 ms
 703 ms *
11  cselt-if.6r1.doc.london.ip6.pipex.net (3ffe:1100:0:c02::1)  685 ms  709 ms
 706 ms
12  doc-6r1-if.6r1.paloalto.ip6.pipex.net (2001:600:4:4::2)  902 ms *  899 ms
13  * * vbns-uunet-uk.hay.vbns.net (3ffe:1100:0:cc08::2)  1023 ms

TRACEROUTE RESULTS -------------------------------------------------------

	Thank you in advance.
	Regards,
	Romano.