On Thu, 2005-10-13 at 15:38 -0400, Valdis.Kletnieks@vt.edu wrote:
On Thu, 13 Oct 2005 21:06:30 +0200, Jeroen Massar said:
Well Valdis, that bad route also has to do with your side of the equation, you might want to check who you are actually using as transits and if the routes they are providing to you are sane enough.
Well, if somebody at stupi.se wants to do a traceroute6 back at us, I'll be glad to see what the reverse path looks like... but last I heard traceroute and traceroute6 showed the *forward* path of packets..
That is correct, try tracepath, this shows at least the assymetry. You can also peek at GRH to see a probable AS path back. ASN's still tell a lot in IPv6. Next month I'll finalize the 'symmetry' tool which allows one to do the AS path checkup between two places automatically.
2001:468::/32 is in the routing table, getting accepted by most ISP's. This one has a reasonable route
The real problem (at least for the forward direction from here) is that the outbound packets get into the Abilene network, and the best path from there to 2001:440:1880 is a 3ffe: tunnel to japan and then another 3ffe: tunnel back to New York.
Kick Abilene to not be so silly and get some real transits. Then again Abiline is educational and those networks seem to have very nice (read: overcomplex) routing policies... Greets, Jeroen