From: Ivan (ivan@iip.net)
Date: Fri Jun 08 2007 - 05:06:46 ART
It is probably possible if your border router has cutted or only def route
from upstread. traseroute imo get [origin AS] form sh ip bgp xx.xx.xx.xx
command. Therefore if you don't have full view traceroute dump can be
extraordinary.
It is just my thought.
On Thursday 07 June 2007 21:03, Biggs, Jeff(M/IRM/TSI/SA26) wrote:
> It seems that when we trace a route from our Internet gateway, we get
> all the routes along the way, but it seems that they are coming from one
> AS.
>
>
>
> Example:
> 66.165.160.121 [AS 6966] 36 msec 36 msec 36 msec
>
> 4 66.165.161.192 [AS 6966] 36 msec 36 msec 36 msec
>
> 5 66.165.160.86 [AS 6966] 176 msec 176 msec 180 msec
>
> 6 62.216.146.189 [AS 6966] 176 msec 176 msec 176 msec
>
> 7 62.216.128.117 [AS 6966] [MPLS: Label 100496 Exp 0] 168 msec 172
> msec 168 msec
>
> 8 62.216.128.73 [AS 6966] 172 msec 168 msec
>
> 62.216.128.150 [AS 6966] 176 msec
>
> 9 62.216.145.54 [AS 6966] 308 msec 308 msec 312 msec
>
>
>
> Now I know that this address space crosses many AS's. The trace below
> is from our provider router (direct peer):
>
>
>
> 2 66.165.160.121 [AS 23148] 36 msec 36 msec 36 msec
>
> 3 t6-0-0.core1.mia.terremark.net (66.165.161.192) [AS 23148] 36 msec
> 36 msec 36 msec
>
> 4 g6-2-0.201.core1.mad.terremark.net (66.165.160.86) [AS 23148] 180
> msec 180 msec 176 msec
>
> 5 62.216.146.189 [AS 15412] 172 msec 176 msec 176 msec
>
> 6 so-4-1-3.0.cjr02.ldn004.flagtel.com (62.216.128.114) [AS 15412]
> [MPLS: Label 100496 Exp 0] 172 msec 168 msec 172 msec
>
> 7 so-5-2-0.0.cjr01.nyc005.flagtel.com (62.216.128.73) [AS 15412] 168
> msec 172msec 168 msec
>
> 8 nileonline-gw-ny.flagtel.com (62.216.145.54) [AS 15412] 308 msec 308
> msec 312 msec
>
>
>
>
>
> Does anyone know what might cause this? Why we are only getting one AS
> response back? The provider says it is not them causing this, but I
> have my suspicions.
>
>
>
>
>
>
>
> Jeffrey Biggs
>
> Sr. Network Engineer
>
> M/CIO/BIE
>
> CCNP, CCDA
>
> 240-646-5003
>
> jbiggs@usaid.gov <mailto:jbiggs@usaid.gov>
>
>
>
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This archive was generated by hypermail 2.1.4 : Sun Jul 01 2007 - 17:24:47 ART