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traceroute problems
![[ie]](/s/countries/ie.gif) Shadow Hawkins on Wednesday, 24 December 2003 20:47:56
Hi there. I have a problem traceroute6'-ing anywhere. ping6 works fine, and everything else appears normal.
I can traceroute anything on my LAN, as far as my ip6 endpoint.
I tried googling, and while I came across others with similar problems, I did not find a resolution.
2001:770:100:6::1 is the pop endpoint of my tunnel.
Output from traceroute6 follows.
I also ran 'tcpdump -i sixxs ip6' on my router at the same time, an have attached the output from that also.
ipv6 is not filtered in any way on the router.
traceroute6 output:
niall@cloud:~$ /usr/sbin/traceroute6 2001:770:100:6::1
traceroute to 2001:770:100:6::1 (2001:770:100:6::1) from 2001:770:104:0:209:5bff:fe55:2c33, 30 hops max, 16 byte packets
1 2001:770:104::1 (2001:770:104::1) 47.85 ms 3.871 ms 3.375 ms
2 * * *
<snip>
8 * * *
9 gw-7.dub-01.ie.sixxs.net (2001:770:100:6::1) 35.016 ms 32.113 ms 32.42 ms
tcpdump output:
gonzo:/# tcpdump -i sixxs ip6
19:34:04.695214 2001:770:104:0:209:5bff:fe55:2c33.32855 > gw-7.dub-01.ie.sixxs.net.33434: udp 16 [hlim 1]
19:34:09.698124 2001:770:104:0:209:5bff:fe55:2c33.32855 > gw-7.dub-01.ie.sixxs.net.33434: udp 16
<snip>
19:35:39.862082 gw-7.dub-01.ie.sixxs.net > 2001:770:104:0:209:5bff:fe55:2c33: icmp6: gw-7.dub-01.ie.sixxs.net udp port 33434 unreachable
19:35:39.867176 2001:770:104:0:209:5bff:fe55:2c33.32855 > gw-7.dub-01.ie.sixxs.net.33434: udp 16
19:35:39.891928 gw-7.dub-01.ie.sixxs.net > 2001:770:104:0:209:5bff:fe55:2c33: icmp6: gw-7.dub-01.ie.sixxs.net udp port 33434 unreachable
traceroute problems
As you didn't provide your configuration I just have to guess that you didn't set your ttl and/or mtu to a correct value. It's either that or you are firewalling. Next to that, when tracerouting use -n, hostnames are not handy in most cases.
traceroute problems
Shadow Hawkins on Friday, 26 December 2003 03:04:26
ignore my retardness.
my linux router runs from a readonly filesystem. i had set my ttl to 64 in /etc/network/interfaces that hadnt kept across a reboot.
damn but do i feel stupid :-/
thanks and happy christmas :)
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![[ch]](/s/countries/ch.gif)
on Wednesday, 24 December 2003 20:50:45
Posting is only allowed when you are