A possible routing loop...

Peter Bunclark psb@ast.cam.ac.uk
Thu, 21 Oct 1999 08:03:33 +0100 (BST)



On Wed, 20 Oct 1999, Romano Piccio-Marchetti Prado wrote:

> 	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?
> 

When I try to get in, it loops at Palo Alto!

# traceroute 3ffe:1001:1:100:a00:20ff:fe83:5531
traceroute: Warning: Multiple interfaces found; using
3ffe:2101:12::836f:4515 @ ip.tun1:1
traceroute to 3ffe:1001:1:100:a00:20ff:fe83:5531, 30 hops max, 60 byte
packets
 1  tunnel8.ulcc (3ffe:2100:1:15:0:c46:b898:f)  10.198 ms *  7.638 ms
 2  3ffe:1100:0:1c01::1  18.100 ms *  17.869 ms
 3  doc-6r1-if.6r1.paloalto.ip6.pipex.net (2001:600:4:4::2)  158.975 ms *
158.783 ms
 4  doc-6r1-if.6r1.paloalto.ip6.pipex.net
(3ffe:1100:0:410:260:3eff:fe59:4d93)  158.484 ms *  159.152 ms
 5  doc-6r1-if.6r1.paloalto.ip6.pipex.net (2001:600:4:4::2)  331.497 ms *
295.743 ms
 6  * doc-6r1-if.6r1.paloalto.ip6.pipex.net
(3ffe:1100:0:410:260:3eff:fe59:4d93)  295.624 ms *
 7  doc-6r1-if.6r1.paloalto.ip6.pipex.net (2001:600:4:4::2)  433.115 ms *
431.815 ms
 8  doc-6r1-if.6r1.paloalto.ip6.pipex.net
(3ffe:1100:0:410:260:3eff:fe59:4d93)
etc etc

Peter.