please tel me how to ? i don't know astraceroute:) ----- Original Message ----- From: "Steven Bellovin" <smb@cs.columbia.edu> To: "Meftah Tayeb" <tayeb.meftah@gmail.com> Cc: "Fred Baker" <fred@cisco.com>; <nanog@nanog.org> Sent: Thursday, December 08, 2011 11:33 PM Subject: Re: Traceroute explanation On Dec 7, 2011, at 2:51 08PM, Meftah Tayeb wrote:
big thank for that but, i am testing that for one day :)
Can you do an AStraceroute or manually translate those addresses into AS#s? That is, might level3 and tinet be using multiple AS#s, in which case this isn't unreasonable?
----- Original Message ----- From: "Fred Baker" <fred@cisco.com> To: "Meftah Tayeb" <tayeb.meftah@gmail.com> Cc: <nanog@nanog.org> Sent: Thursday, December 08, 2011 11:23 PM Subject: Re: Traceroute explanation
This is just a guess, but I'll bet the route changed while you were measuring it.
Traceroute sends a request, awaits a response, sends a request, ... Suppose that the route was
172.28.0.1 -> 10.16.0.2 -> 41.200.16.1 -> 172.17.2.25 -> 213.140.58.10 -> 195.22.195.125 -> 4.69.151.13 -> 213.200.68.61 -> somewhere else
and after the test got that far, two systems got inserted into the path before level3, resulting in the route entering level3 at a different point, 4.69.141.249. What you now have is
172.28.0.1 -> 10.16.0.2 -> 41.200.16.1 -> 172.17.2.25 -> 213.140.58.10 -> 195.22.195.125 -> unknown -> unknown -> 4.69.141.249 -> 77.67.66.154 -> and so on
The effect would be to get a result like this.
Next time you see something like this, suggestion: repeat the traceroute and see what you get.
On Dec 7, 2011, at 12:12 PM, Meftah Tayeb wrote:
Hey folks, i see a strange traceroute there
Détermination de l'itinéraire vers www.rri.ro [193.231.72.52] avec un maximum de 30 sauts :
1 2 ms 1 ms 1 ms 172.28.0.1 2 1 ms 1 ms 1 ms localhost [10.16.0.2] 3 10 ms 10 ms 13 ms 41.200.16.1 4 11 ms 10 ms 11 ms 172.17.2.25 5 21 ms 21 ms 21 ms 213.140.58.10 6 34 ms 31 ms 55 ms pos14-0.palermo9.pal.seabone.net [195.22.197.125 ] 7 34 ms 33 ms 35 ms ae-5-6.bar2.marseille1.level3.net [4.69.151.13] 8 106 ms 68 ms 67 ms xe-1-1-0.mil10.ip4.tinet.net [213.200.68.61] 9 74 ms 73 ms 74 ms ae-1-12.bar1.budapest1.level3.net [4.69.141.249] 10 63 ms 63 ms 79 ms euroweb-gw.ip4.tinet.net [77.67.66.154] 11 85 ms 84 ms 84 ms v15-core1.stsisp.ro [193.151.28.1] 12 100 ms 100 ms 102 ms inet-crli1.qrli1.buh.ew.ro [81.24.28.226] 13 81 ms 81 ms 81 ms 193.231.72.10 14 92 ms 92 ms 93 ms ip4-89-238-225-90.euroweb.ro [89.238.225.90] 15 89 ms 89 ms 89 ms webrri.rri.ro.72.231.193.in-addr.arpa [193.231.7 2.52] Itinéraire déterminé. C:\Documents and Settings\TAYEB> Seabone, then level3, then Tinet, then level3, then tinet ? if is that a routing stufs that i don't know, please let me know :) i never saw that befaure
Meftah Tayeb IT Consulting http://www.tmvoip.com/ phone: +21321656139 Mobile: +213660347746
__________ Information from ESET NOD32 Antivirus, version of virus signature database 6695 (20111208) __________
The message was checked by ESET NOD32 Antivirus.
__________ Information from ESET NOD32 Antivirus, version of virus signature database 6695 (20111208) __________
The message was checked by ESET NOD32 Antivirus.
__________ Information from ESET NOD32 Antivirus, version of virus signature database 6695 (20111208) __________
The message was checked by ESET NOD32 Antivirus.
--Steve Bellovin, https://www.cs.columbia.edu/~smb __________ Information from ESET NOD32 Antivirus, version of virus signature database 6695 (20111208) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __________ Information from ESET NOD32 Antivirus, version of virus signature database 6695 (20111208) __________ The message was checked by ESET NOD32 Antivirus. http://www.eset.com