Strange traceroute results
Shadow Hawkins on Sunday, 21 January 2007 13:25:17
Hi.
Last week i had to update my aiccu running on my linksys wrt router because the old version i was using was rejected by the server.
since then i noticed strange traceroute behavior like this
traceroute6 to www.sixxs.net:
fadenb@hayami:~$ traceroute6 www.sixxs.net
traceroute to noc.sixxs.net (2001:838:1:1:210:dcff:fe20:7c7c) from 2001:6f8:139d:0:217:31ff:fe94:d706, 30 hops max, 16 byte packets
1 2001:6f8:139d:: (2001:6f8:139d::) 0.493 ms 0.49 ms 0.434 ms
2 * * *
3 * * *
4 * * *
5 * * *
6 * * *
7 * * *
8 * * *
9 so-0-0-0.dus11.ip6.tiscali.net (2001:668:0:2::1:1) 45.534 ms 43.689 ms 46.938 ms
10 so-0-0-0.ams22.ip6.tiscali.net (2001:668:0:2::1:122) 151.272 ms 79.576 ms 65.711 ms
11 so-6-0-0.ams11.ip6.tiscali.net (2001:668:0:2::1:271) 54.73 ms 54.274 ms 53.682 ms
12 ge6-2-0.br0.ams3.nl.gbxs.net (2001:7f8:1::a500:9009:1) 56.155 ms 56.114 ms 57.148 ms
13 ams-ix.ipv6.concepts.nl (2001:7f8:1::a501:2871:1) 54.456 ms 98.425 ms 54.204 ms
14 se1.breda.ipv6.concepts-ict.net (2001:838:0:10::2) 71.468 ms 56.905 ms 81.692 ms
15 noc.sixxs.net (2001:838:1:1:210:dcff:fe20:7c7c) 96.84 ms 73.871 ms 96.903 ms
fadenb@hayami:~$
traceroute6 to 2001:6f8:900:4f2::1 my pop ipv6:
traceroute to 2001:6f8:900:4f2::1 (2001:6f8:900:4f2::1) from 2001:6f8:139d:0:217:31ff:fe94:d706, 30 hops max, 16 byte packets
1 2001:6f8:139d:: (2001:6f8:139d::) 0.477 ms 0.539 ms 0.437 ms
2 * * *
3 * * *
4 * * *
5 * * *
6 * * *
7 * * *
8 * * *
9 gw-1267.ham-01.de.sixxs.net (2001:6f8:900:4f2::1) 37.133 ms 28.117 ms 27.761 ms
fadenb@hayami:~$
output of ip -6 route on my router:
~ # ip -6 route
2001:6f8:900:4f2::/64 via :: dev sixxs metric 256 mtu 1280 advmss 1220
2001:6f8:139d::/64 dev br0 metric 256 mtu 1500 advmss 1220
fe80::/64 dev eth0 metric 256 mtu 1500 advmss 1220
fe80::/64 dev eth1 metric 256 mtu 1500 advmss 1220
fe80::/64 dev vlan0 metric 256 mtu 1500 advmss 1220
fe80::/64 dev br0 metric 256 mtu 1500 advmss 1220
fe80::/64 dev vlan1 metric 256 mtu 1500 advmss 1220
fe80::/64 via :: dev sixxs metric 256 mtu 1280 advmss 1220
ff00::/8 dev eth0 metric 256 mtu 1500 advmss 1220
ff00::/8 dev eth1 metric 256 mtu 1500 advmss 1220
ff00::/8 dev vlan0 metric 256 mtu 1500 advmss 1220
ff00::/8 dev br0 metric 256 mtu 1500 advmss 1220
ff00::/8 dev vlan1 metric 256 mtu 1500 advmss 1220
ff00::/8 dev sixxs metric 256 mtu 1280 advmss 1220
default via 2001:6f8:900:4f2::1 dev sixxs metric 1024 mtu 1280 advmss 1220
~ #
please advise me what is going wrong.
THX
Tristan
Strange traceroute results
Jeroen Massar on Sunday, 21 January 2007 13:48:26
Check the TTL of the tunnel interface ("ip tun sho"). The TTL should be '64' and not 'inherit'.
Also you might want to add a "ip ro add 2001:6f8:139d::/48 dev lo" somewhere.
Of course, next to that read "Reporting Problems" part on the Contact page.
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