Is anyone else seeing some routing loops in Cogent's network? ala: ... 18 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 34.475 ms 36.336 ms 34.087 ms 19 uslec.iad01.atlas.cogentco.com (154.54.11.214) 39.286 ms 38.188 ms 37.530 ms 20 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 33.148 ms 37.066 ms 35.823 ms 21 * uslec.iad01.atlas.cogentco.com (154.54.11.214) 38.403 ms 37.534 ms 22 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 35.051 ms 33.120 ms 34.209 ms 23 uslec.iad01.atlas.cogentco.com (154.54.11.214) 39.112 ms * * 24 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 34.603 ms 34.994 ms 34.119 ms 25 * uslec.iad01.atlas.cogentco.com (154.54.11.214) 36.929 ms 38.443 ms 26 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 34.784 ms 35.317 ms 33.839 ms 27 uslec.iad01.atlas.cogentco.com (154.54.11.214) 37.185 ms 38.327 ms 39.863 ms 28 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 35.362 ms 36.451 ms 34.788 ms 29 uslec.iad01.atlas.cogentco.com (154.54.11.214) 38.600 ms 39.782 ms 40.031 ms 30 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 38.156 ms 39.726 ms 35.726 ms 31 uslec.iad01.atlas.cogentco.com (154.54.11.214) 47.281 ms 37.617 ms 49.460 ms 32 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 35.389 ms 35.988 ms 35.609 ms 33 uslec.iad01.atlas.cogentco.com (154.54.11.214) 39.162 ms 121.744 ms^C - - - - Joshua Fiske '03, '04 Network and Security Engineer Clarkson University, Office of Information Technology (315) 268-6722 -- Fax: (315) 268-6570 GPG Key: http://clarkson.edu/~jfiske/jfiske_pub.asc jfiske@clarkson.edu CONFIDENTIALITY: This e-mail (including any attachments) may contain confidential, proprietary and privileged information, and unauthorized disclosure or use is prohibited. If you received this e-mail in error, please notify the sender and delete this e-mail from your system.
You should have kept the traceroute running. They might be passing packets back and fourth a couple of dozen times as a practical joke before eventually delivering the traffic to the next hop. Cogent = WIN On Jun 23, 2008, at 6:3911 000PM, Josh Fiske wrote:
Is anyone else seeing some routing loops in Cogent's network?
ala:
... 18 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 34.475 ms 36.336 ms 34.087 ms 19 uslec.iad01.atlas.cogentco.com (154.54.11.214) 39.286 ms 38.188 ms 37.530 ms 20 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 33.148 ms 37.066 ms 35.823 ms 21 * uslec.iad01.atlas.cogentco.com (154.54.11.214) 38.403 ms 37.534 ms 22 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 35.051 ms 33.120 ms 34.209 ms 23 uslec.iad01.atlas.cogentco.com (154.54.11.214) 39.112 ms * * 24 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 34.603 ms 34.994 ms 34.119 ms 25 * uslec.iad01.atlas.cogentco.com (154.54.11.214) 36.929 ms 38.443 ms 26 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 34.784 ms 35.317 ms 33.839 ms 27 uslec.iad01.atlas.cogentco.com (154.54.11.214) 37.185 ms 38.327 ms 39.863 ms 28 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 35.362 ms 36.451 ms 34.788 ms 29 uslec.iad01.atlas.cogentco.com (154.54.11.214) 38.600 ms 39.782 ms 40.031 ms 30 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 38.156 ms 39.726 ms 35.726 ms 31 uslec.iad01.atlas.cogentco.com (154.54.11.214) 47.281 ms 37.617 ms 49.460 ms 32 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 35.389 ms 35.988 ms 35.609 ms 33 uslec.iad01.atlas.cogentco.com (154.54.11.214) 39.162 ms 121.744 ms^C
- - - - Joshua Fiske '03, '04 Network and Security Engineer Clarkson University, Office of Information Technology (315) 268-6722 -- Fax: (315) 268-6570 GPG Key: http://clarkson.edu/~jfiske/jfiske_pub.asc jfiske@clarkson.edu
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Also call USLEC, it seems it might be a problem on their side, because it reaches cogent's uslec edge obviously. On Jun 23, 2008, at 6:4317 000PM, Daniel Corbe wrote:
You should have kept the traceroute running. They might be passing packets back and fourth a couple of dozen times as a practical joke before eventually delivering the traffic to the next hop.
Cogent = WIN
On Jun 23, 2008, at 6:3911 000PM, Josh Fiske wrote:
Is anyone else seeing some routing loops in Cogent's network?
ala:
... 18 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 34.475 ms 36.336 ms 34.087 ms 19 uslec.iad01.atlas.cogentco.com (154.54.11.214) 39.286 ms 38.188 ms 37.530 ms 20 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 33.148 ms 37.066 ms 35.823 ms 21 * uslec.iad01.atlas.cogentco.com (154.54.11.214) 38.403 ms 37.534 ms 22 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 35.051 ms 33.120 ms 34.209 ms 23 uslec.iad01.atlas.cogentco.com (154.54.11.214) 39.112 ms * * 24 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 34.603 ms 34.994 ms 34.119 ms 25 * uslec.iad01.atlas.cogentco.com (154.54.11.214) 36.929 ms 38.443 ms 26 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 34.784 ms 35.317 ms 33.839 ms 27 uslec.iad01.atlas.cogentco.com (154.54.11.214) 37.185 ms 38.327 ms 39.863 ms 28 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 35.362 ms 36.451 ms 34.788 ms 29 uslec.iad01.atlas.cogentco.com (154.54.11.214) 38.600 ms 39.782 ms 40.031 ms 30 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 38.156 ms 39.726 ms 35.726 ms 31 uslec.iad01.atlas.cogentco.com (154.54.11.214) 47.281 ms 37.617 ms 49.460 ms 32 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 35.389 ms 35.988 ms 35.609 ms 33 uslec.iad01.atlas.cogentco.com (154.54.11.214) 39.162 ms 121.744 ms^C
- - - - Joshua Fiske '03, '04 Network and Security Engineer Clarkson University, Office of Information Technology (315) 268-6722 -- Fax: (315) 268-6570 GPG Key: http://clarkson.edu/~jfiske/jfiske_pub.asc jfiske@clarkson.edu
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Are you able to share what IP you're tracing to? ________________________________________ From: outages-bounces@isotf.org [outages-bounces@isotf.org] On Behalf Of Josh Fiske [jfiske@clarkson.edu] Sent: Monday, June 23, 2008 9:39 PM To: outages@isotf.org Subject: [outages] routing loop in cogent? Is anyone else seeing some routing loops in Cogent's network? ala: ... 18 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 34.475 ms 36.336 ms 34.087 ms 19 uslec.iad01.atlas.cogentco.com (154.54.11.214) 39.286 ms 38.188 ms 37.530 ms 20 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 33.148 ms 37.066 ms 35.823 ms 21 * uslec.iad01.atlas.cogentco.com (154.54.11.214) 38.403 ms 37.534 ms 22 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 35.051 ms 33.120 ms 34.209 ms 23 uslec.iad01.atlas.cogentco.com (154.54.11.214) 39.112 ms * * 24 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 34.603 ms 34.994 ms 34.119 ms 25 * uslec.iad01.atlas.cogentco.com (154.54.11.214) 36.929 ms 38.443 ms 26 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 34.784 ms 35.317 ms 33.839 ms 27 uslec.iad01.atlas.cogentco.com (154.54.11.214) 37.185 ms 38.327 ms 39.863 ms 28 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 35.362 ms 36.451 ms 34.788 ms 29 uslec.iad01.atlas.cogentco.com (154.54.11.214) 38.600 ms 39.782 ms 40.031 ms 30 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 38.156 ms 39.726 ms 35.726 ms 31 uslec.iad01.atlas.cogentco.com (154.54.11.214) 47.281 ms 37.617 ms 49.460 ms 32 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 35.389 ms 35.988 ms 35.609 ms 33 uslec.iad01.atlas.cogentco.com (154.54.11.214) 39.162 ms 121.744 ms^C - - - - Joshua Fiske '03, '04 Network and Security Engineer Clarkson University, Office of Information Technology (315) 268-6722 -- Fax: (315) 268-6570 GPG Key: http://clarkson.edu/~jfiske/jfiske_pub.asc jfiske@clarkson.edu CONFIDENTIALITY: This e-mail (including any attachments) may contain confidential, proprietary and privileged information, and unauthorized disclosure or use is prohibited. If you received this e-mail in error, please notify the sender and delete this e-mail from your system.
On 23 Jun 2008, at 21:47, Darrell Hyde wrote:
Are you able to share what IP you're tracing to?
I don't know much about cogent's naming scheme, but that traceroute could be packets following a customer-announced aggregate and, lacking a more-specific in the IGP, following a default back out to cogentland. Joe
Complete traceroute for the interested... (FWIW, 205.232.34.1 is the DNS for a small ISP in central NY.) At this point, I cannot determine whether they have dropped off the map or whether Cogent is just mis-routing traffic...I don't have another host on the other side of Cogent's cloud to trace to. $ traceroute 205.232.34.1 traceroute to 205.232.34.1 (205.232.34.1), 64 hops max, 40 byte packets 1 192.168.1.1 (192.168.1.1) 1.205 ms 0.899 ms 0.744 ms 2 10.101.32.1 (10.101.32.1) 9.872 ms 12.886 ms 8.218 ms 3 gig0-0.syrcnypth-rtr01.nyroc.rr.com (24.92.227.102) 8.842 ms 7.082 ms 7.968 ms 4 gig6-3.syrcnypth-rtr02.nyroc.rr.com (24.92.230.74) 8.523 ms 8.358 ms 22.373 ms 5 gig1-0-7.syrcnyflk-rtr02.nyroc.rr.com (24.92.227.42) 12.746 ms 12.645 ms 13.085 ms 6 * ge-4-3-0.albynywav-rtr03.nyroc.rr.com (24.24.7.53) 22.296 ms 23.362 ms 7 ae-5-0.cr0.nyc30.tbone.rr.com (66.109.6.74) 24.973 ms 25.460 ms 25.236 ms 8 ae-1-0.pr0.nyc20.tbone.rr.com (66.109.6.163) 26.920 ms 27.645 ms 28.417 ms 9 te2-1.mpd01.jfk05.atlas.cogentco.com (154.54.13.185) 27.786 ms 28.297 ms 28.696 ms 10 vl3496.mpd03.jfk02.atlas.cogentco.com (154.54.6.49) 28.706 ms vl3491.ccr04.jfk02.atlas.cogentco.com (154.54.7.9) 29.195 ms vl3496.mpd03.jfk02.atlas.cogentco.com (154.54.6.49) 30.475 ms 11 te4-1.ccr01.jfk07.atlas.cogentco.com (154.54.7.30) 28.199 ms 27.434 ms 28.647 ms 12 paetec_communications_inc.dmarc.cogentco.com (38.112.26.90) 29.272 ms 30.293 ms 28.723 ms 13 gi-1-0-1-13.core01.nycmny01.paetec.net (66.155.218.97) 28.767 ms 30.290 ms 29.108 ms 14 64.80.253.234 (64.80.253.234) 27.571 ms 29.827 ms 28.415 ms 15 ge-1-3-0.core02.nycmny03.paetec.net (64.80.253.98) 29.724 ms 27.800 ms 28.632 ms 16 as1.core02.asbnva01.paetec.net (169.130.81.230) 37.043 ms 44.398 ms 86.877 ms 17 so-0-1-0.core01.asbnva01.paetec.net (169.130.81.85) 36.541 ms 36.753 ms 35.901 ms 18 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 33.438 ms 34.282 ms 33.746 ms 19 uslec.iad01.atlas.cogentco.com (154.54.11.214) 36.553 ms 35.728 ms 38.174 ms 20 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 35.176 ms 33.785 ms 33.844 ms 21 uslec.iad01.atlas.cogentco.com (154.54.11.214) 102.015 ms 37.123 ms 37.943 ms 22 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 34.138 ms 34.589 ms 34.388 ms 23 * uslec.iad01.atlas.cogentco.com (154.54.11.214) 36.982 ms 37.857 ms 24 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 36.449 ms 35.107 ms 34.794 ms 25 uslec.iad01.atlas.cogentco.com (154.54.11.214) 37.972 ms 36.947 ms 38.100 ms 26 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 33.736 ms 33.483 ms * 27 * uslec.iad01.atlas.cogentco.com (154.54.11.214) 36.605 ms 37.762 ms 28 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 37.073 ms 34.558 ms 36.043 ms 29 *^C - - - - Joshua Fiske '03, '04 Network and Security Engineer Clarkson University, Office of Information Technology (315) 268-6722 -- Fax: (315) 268-6570 GPG Key: http://clarkson.edu/~jfiske/jfiske_pub.asc jfiske@clarkson.edu CONFIDENTIALITY: This e-mail (including any attachments) may contain confidential, proprietary and privileged information, and unauthorized disclosure or use is prohibited. If you received this e-mail in error, please notify the sender and delete this e-mail from your system. -----Original Message----- From: outages-bounces@isotf.org on behalf of Darrell Hyde Sent: Mon 6/23/2008 9:47 PM To: outages@isotf.org Subject: Re: [outages] routing loop in cogent? Are you able to share what IP you're tracing to? ________________________________________ From: outages-bounces@isotf.org [outages-bounces@isotf.org] On Behalf Of Josh Fiske [jfiske@clarkson.edu] Sent: Monday, June 23, 2008 9:39 PM To: outages@isotf.org Subject: [outages] routing loop in cogent? Is anyone else seeing some routing loops in Cogent's network? ala: ... 18 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 34.475 ms 36.336 ms 34.087 ms 19 uslec.iad01.atlas.cogentco.com (154.54.11.214) 39.286 ms 38.188 ms 37.530 ms 20 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 33.148 ms 37.066 ms 35.823 ms 21 * uslec.iad01.atlas.cogentco.com (154.54.11.214) 38.403 ms 37.534 ms 22 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 35.051 ms 33.120 ms 34.209 ms 23 uslec.iad01.atlas.cogentco.com (154.54.11.214) 39.112 ms * * 24 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 34.603 ms 34.994 ms 34.119 ms 25 * uslec.iad01.atlas.cogentco.com (154.54.11.214) 36.929 ms 38.443 ms 26 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 34.784 ms 35.317 ms 33.839 ms 27 uslec.iad01.atlas.cogentco.com (154.54.11.214) 37.185 ms 38.327 ms 39.863 ms 28 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 35.362 ms 36.451 ms 34.788 ms 29 uslec.iad01.atlas.cogentco.com (154.54.11.214) 38.600 ms 39.782 ms 40.031 ms 30 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 38.156 ms 39.726 ms 35.726 ms 31 uslec.iad01.atlas.cogentco.com (154.54.11.214) 47.281 ms 37.617 ms 49.460 ms 32 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 35.389 ms 35.988 ms 35.609 ms 33 uslec.iad01.atlas.cogentco.com (154.54.11.214) 39.162 ms 121.744 ms^C - - - - Joshua Fiske '03, '04 Network and Security Engineer Clarkson University, Office of Information Technology (315) 268-6722 -- Fax: (315) 268-6570 GPG Key: http://clarkson.edu/~jfiske/jfiske_pub.asc jfiske@clarkson.edu CONFIDENTIALITY: This e-mail (including any attachments) may contain confidential, proprietary and privileged information, and unauthorized disclosure or use is prohibited. If you received this e-mail in error, please notify the sender and delete this e-mail from your system. _______________________________________________ outages mailing list outages@isotf.org https://puck.nether.net/mailman/listinfo/outages
On Mon, Jun 23, 2008 at 10:03:39PM -0400, Josh Fiske wrote:
Complete traceroute for the interested... (FWIW, 205.232.34.1 is the DNS for a small ISP in central NY.) At this point, I cannot determine whether they have dropped off the map or whether Cogent is just mis-routing traffic...I don't have another host on the other side of Cogent's cloud to trace to.
FWIW, I see the same thing from a different source (72.20.106.2): traceroute to 205.232.34.1 (205.232.34.1), 64 hops max, 40 byte packets 1 72.20.106.1 (72.20.106.1) 0.617 ms 0.612 ms 0.407 ms 2 er0sc1-g2-0.bayarea.net (209.128.116.90) 0.395 ms 0.283 ms 0.239 ms 3 er0sc1-g2-1.BAYAREA.NET (209.128.95.91) 0.398 ms 0.290 ms 0.240 ms 4 ge-7-19.car1.SanJose1.Level3.net (4.79.219.105) 6.478 ms 1.069 ms 0.864 ms 5 vlan69.csw1.SanJose1.Level3.net (4.68.18.62) 12.565 ms 1.067 ms 0.865 ms 6 ae-64-64.ebr4.SanJose1.Level3.net (4.69.134.241) 5.855 ms 8.256 ms 1.335 ms 7 ae-2.ebr4.NewYork1.Level3.net (4.69.135.186) 120.723 ms 121.408 ms 127.543 ms 8 ae-74-74.csw2.NewYork1.Level3.net (4.69.134.118) 124.579 ms 126.670 ms 126.923 ms 9 ae-21-79.car1.NewYork1.Level3.net (4.68.16.67) 80.583 ms ae-31-89.car1.NewYork1.Level3.net (4.68.16.131) 80.788 ms 80.472 ms 10 unknown.Level3.net (63.208.174.2) 135.902 ms 129.309 ms 126.605 ms 11 as1.core02.asbnva01.paetec.net (169.130.81.230) 80.898 ms 80.953 ms 81.211 ms 12 so-0-1-0.core01.asbnva01.paetec.net (169.130.81.85) 80.587 ms 80.496 ms 80.741 ms 13 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 80.585 ms 80.604 ms 80.744 ms 14 uslec.iad01.atlas.cogentco.com (154.54.11.214) 81.052 ms 80.858 ms 80.914 ms 15 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 80.936 ms 80.741 ms 80.902 ms 16 * * uslec.iad01.atlas.cogentco.com (154.54.11.214) 81.039 ms 17 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 81.092 ms 80.618 ms 80.787 ms 18 uslec.iad01.atlas.cogentco.com (154.54.11.214) 80.897 ms 81.551 ms 81.051 ms 19 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 81.050 ms 81.082 ms 81.523 ms 20 * * * 21 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 81.833 ms 81.716 ms 81.744 ms 22 uslec.iad01.atlas.cogentco.com (154.54.11.214) 81.564 ms 81.462 ms 81.992 ms 23 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 81.364 ms 81.866 ms 82.318 ms ^C -- | Jeremy Chadwick jdc at parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |
Going through GLBX I get right to 205.232.34.1.... 7 64.209.107.158 (64.209.107.158) 69.120 ms 73.124 ms 67.318 ms 8 66.152.112.10 (66.152.112.10) 161.185 ms 69.324 ms 70.008 ms 9 66.152.113.44 (66.152.113.44) 70.924 ms 68.378 ms 71.077 ms 10 bond0b.lightlink.com (216.7.9.33) 80.011 ms 81.825 ms 80.691 ms 11 fw1.lightlink.com (205.232.89.2) 75.907 ms 73.856 ms 91.166 ms 12 205.232.34.1.lightlink.com (205.232.34.1) 94.835 ms 89.494 ms 93.681 ms The problem seems closer to the zloc rather than cogent. 9 sl-finlak-43408-0.sprintlink.net (144.223.155.22) 83.742 ms 83.892 ms 84.122 ms 10 66.152.112.2 (66.152.112.2) 65.979 ms 66.193 ms 65.723 ms 11 66.152.113.44 (66.152.113.44) 65.945 ms 65.999 ms 66.152 ms 12 bond0b.lightlink.com (216.7.9.33) 72.074 ms 72.370 ms 68.521 ms 13 fw1.lightlink.com (205.232.89.2) 81.403 ms 81.144 ms 70.914 ms 14 * * * ... Both routes go through 66.152.113.44 ,,,, Maybe local firewall/acl rule @FINGER LAKES TECHNOLOGIES GROUP, INC.? Sorry for the caps but cut/pasted from rwhois :-) Correct me if you see different results :-) HTH G On Jun 23, 2008, at 21:20 , Jeremy Chadwick wrote:
On Mon, Jun 23, 2008 at 10:03:39PM -0400, Josh Fiske wrote:
Complete traceroute for the interested... (FWIW, 205.232.34.1 is the DNS for a small ISP in central NY.) At this point, I cannot determine whether they have dropped off the map or whether Cogent is just mis-routing traffic...I don't have another host on the other side of Cogent's cloud to trace to.
FWIW, I see the same thing from a different source (72.20.106.2):
traceroute to 205.232.34.1 (205.232.34.1), 64 hops max, 40 byte packets 1 72.20.106.1 (72.20.106.1) 0.617 ms 0.612 ms 0.407 ms 2 er0sc1-g2-0.bayarea.net (209.128.116.90) 0.395 ms 0.283 ms 0.239 ms 3 er0sc1-g2-1.BAYAREA.NET (209.128.95.91) 0.398 ms 0.290 ms 0.240 ms 4 ge-7-19.car1.SanJose1.Level3.net (4.79.219.105) 6.478 ms 1.069 ms 0.864 ms 5 vlan69.csw1.SanJose1.Level3.net (4.68.18.62) 12.565 ms 1.067 ms 0.865 ms 6 ae-64-64.ebr4.SanJose1.Level3.net (4.69.134.241) 5.855 ms 8.256 ms 1.335 ms 7 ae-2.ebr4.NewYork1.Level3.net (4.69.135.186) 120.723 ms 121.408 ms 127.543 ms 8 ae-74-74.csw2.NewYork1.Level3.net (4.69.134.118) 124.579 ms 126.670 ms 126.923 ms 9 ae-21-79.car1.NewYork1.Level3.net (4.68.16.67) 80.583 ms ae-31-89.car1.NewYork1.Level3.net (4.68.16.131) 80.788 ms 80.472 ms 10 unknown.Level3.net (63.208.174.2) 135.902 ms 129.309 ms 126.605 ms 11 as1.core02.asbnva01.paetec.net (169.130.81.230) 80.898 ms 80.953 ms 81.211 ms 12 so-0-1-0.core01.asbnva01.paetec.net (169.130.81.85) 80.587 ms 80.496 ms 80.741 ms 13 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 80.585 ms 80.604 ms 80.744 ms 14 uslec.iad01.atlas.cogentco.com (154.54.11.214) 81.052 ms 80.858 ms 80.914 ms 15 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 80.936 ms 80.741 ms 80.902 ms 16 * * uslec.iad01.atlas.cogentco.com (154.54.11.214) 81.039 ms 17 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 81.092 ms 80.618 ms 80.787 ms 18 uslec.iad01.atlas.cogentco.com (154.54.11.214) 80.897 ms 81.551 ms 81.051 ms 19 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 81.050 ms 81.082 ms 81.523 ms 20 * * * 21 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 81.833 ms 81.716 ms 81.744 ms 22 uslec.iad01.atlas.cogentco.com (154.54.11.214) 81.564 ms 81.462 ms 81.992 ms 23 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 81.364 ms 81.866 ms 82.318 ms ^C
-- | Jeremy Chadwick jdc at parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |
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Josh Fiske wrote:
Complete traceroute for the interested... (FWIW, 205.232.34.1 is the DNS for a small ISP in central NY.) At this point, I cannot determine whether they have dropped off the map or whether Cogent is just mis-routing traffic...I don't have another host on the other side of Cogent's cloud to trace to.
It's reachable from here, but not through Cogent. 3 f0-0.border2.sba1.netlojix.net (207.71.192.51) 41.404 ms 323.870 ms 330.528 ms 4 so-1-0.ipcolo1.losangeles1.level3.net (64.156.173.57) 36.368 ms 39.335 ms 34.199 ms 5 vlan51.csw1.losangeles1.level3.net (4.68.102.30) 35.790 ms 37.564 ms 38.921 ms 6 ae-14-69.car4.losangeles1.level3.net (4.68.20.6) 37.759 ms 36.463 ms 39.010 ms 7 globalcrossing-level3-10ge.losangeles1.level3.net (4.68.110.66) 41.986 ms 43.080 ms 35.000 ms 8 64.209.107.158 (64.209.107.158) 118.865 ms 123.881 ms 120.093 ms 9 66.152.112.10 (66.152.112.10) 121.595 ms 119.958 ms 121.811 ms 10 66.152.113.44 (66.152.113.44) 123.470 ms 122.608 ms 122.927 ms 11 bond0b.lightlink.com (216.7.9.33) 130.447 ms 128.141 ms 131.083 ms 12 fw1.lightlink.com (205.232.89.2) 142.068 ms 139.863 ms 139.027 ms 13 205.232.34.1.lightlink.com (205.232.34.1) 129.275 ms 137.171 ms 149.257 ms -- Jay Hennigan - CCIE #7880 - Network Engineering - jay@impulse.net Impulse Internet Service - http://www.impulse.net/ Your local telephone and internet company - 805 884-6323 - WB6RDV
Might helpful to call the ISP (http://www.lightlink.com/light.html) and ask the person to trace back to you and see if they seem the same thing. If 205.232.34.1 is their DNS server, it doesn't match what's in the DNS for lightlink.com. They also might considering renaming the reverse for this DNS server to something that makes a bit more sense than 205.232.34.1.lightlink.com. Frank From: outages-bounces@isotf.org [mailto:outages-bounces@isotf.org] On Behalf Of Josh Fiske Sent: Monday, June 23, 2008 9:04 PM To: Darrell Hyde; outages@isotf.org Subject: Re: [outages] routing loop in cogent? Complete traceroute for the interested... (FWIW, 205.232.34.1 is the DNS for a small ISP in central NY.) At this point, I cannot determine whether they have dropped off the map or whether Cogent is just mis-routing traffic...I don't have another host on the other side of Cogent's cloud to trace to. $ traceroute 205.232.34.1 traceroute to 205.232.34.1 (205.232.34.1), 64 hops max, 40 byte packets 1 192.168.1.1 (192.168.1.1) 1.205 ms 0.899 ms 0.744 ms 2 10.101.32.1 (10.101.32.1) 9.872 ms 12.886 ms 8.218 ms 3 gig0-0.syrcnypth-rtr01.nyroc.rr.com (24.92.227.102) 8.842 ms 7.082 ms 7.968 ms 4 gig6-3.syrcnypth-rtr02.nyroc.rr.com (24.92.230.74) 8.523 ms 8.358 ms 22.373 ms 5 gig1-0-7.syrcnyflk-rtr02.nyroc.rr.com (24.92.227.42) 12.746 ms 12.645 ms 13.085 ms 6 * ge-4-3-0.albynywav-rtr03.nyroc.rr.com (24.24.7.53) 22.296 ms 23.362 ms 7 ae-5-0.cr0.nyc30.tbone.rr.com (66.109.6.74) 24.973 ms 25.460 ms 25.236 ms 8 ae-1-0.pr0.nyc20.tbone.rr.com (66.109.6.163) 26.920 ms 27.645 ms 28.417 ms 9 te2-1.mpd01.jfk05.atlas.cogentco.com (154.54.13.185) 27.786 ms 28.297 ms 28.696 ms 10 vl3496.mpd03.jfk02.atlas.cogentco.com (154.54.6.49) 28.706 ms vl3491.ccr04.jfk02.atlas.cogentco.com (154.54.7.9) 29.195 ms vl3496.mpd03.jfk02.atlas.cogentco.com (154.54.6.49) 30.475 ms 11 te4-1.ccr01.jfk07.atlas.cogentco.com (154.54.7.30) 28.199 ms 27.434 ms 28.647 ms 12 paetec_communications_inc.dmarc.cogentco.com (38.112.26.90) 29.272 ms 30.293 ms 28.723 ms 13 gi-1-0-1-13.core01.nycmny01.paetec.net (66.155.218.97) 28.767 ms 30.290 ms 29.108 ms 14 64.80.253.234 (64.80.253.234) 27.571 ms 29.827 ms 28.415 ms 15 ge-1-3-0.core02.nycmny03.paetec.net (64.80.253.98) 29.724 ms 27.800 ms 28.632 ms 16 as1.core02.asbnva01.paetec.net (169.130.81.230) 37.043 ms 44.398 ms 86.877 ms 17 so-0-1-0.core01.asbnva01.paetec.net (169.130.81.85) 36.541 ms 36.753 ms 35.901 ms 18 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 33.438 ms 34.282 ms 33.746 ms 19 uslec.iad01.atlas.cogentco.com (154.54.11.214) 36.553 ms 35.728 ms 38.174 ms 20 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 35.176 ms 33.785 ms 33.844 ms 21 uslec.iad01.atlas.cogentco.com (154.54.11.214) 102.015 ms 37.123 ms 37.943 ms 22 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 34.138 ms 34.589 ms 34.388 ms 23 * uslec.iad01.atlas.cogentco.com (154.54.11.214) 36.982 ms 37.857 ms 24 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 36.449 ms 35.107 ms 34.794 ms 25 uslec.iad01.atlas.cogentco.com (154.54.11.214) 37.972 ms 36.947 ms 38.100 ms 26 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 33.736 ms 33.483 ms * 27 * uslec.iad01.atlas.cogentco.com (154.54.11.214) 36.605 ms 37.762 ms 28 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 37.073 ms 34.558 ms 36.043 ms 29 *^C - - - - Joshua Fiske '03, '04 Network and Security Engineer Clarkson University, Office of Information Technology (315) 268-6722 -- Fax: (315) 268-6570 GPG Key: http://clarkson.edu/~jfiske/jfiske_pub.asc jfiske@clarkson.edu CONFIDENTIALITY: This e-mail (including any attachments) may contain confidential, proprietary and privileged information, and unauthorized disclosure or use is prohibited. If you received this e-mail in error, please notify the sender and delete this e-mail from your system. -----Original Message----- From: outages-bounces@isotf.org on behalf of Darrell Hyde Sent: Mon 6/23/2008 9:47 PM To: outages@isotf.org Subject: Re: [outages] routing loop in cogent? Are you able to share what IP you're tracing to? ________________________________________ From: outages-bounces@isotf.org [outages-bounces@isotf.org] On Behalf Of Josh Fiske [jfiske@clarkson.edu] Sent: Monday, June 23, 2008 9:39 PM To: outages@isotf.org Subject: [outages] routing loop in cogent? Is anyone else seeing some routing loops in Cogent's network? ala: ... 18 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 34.475 ms 36.336 ms 34.087 ms 19 uslec.iad01.atlas.cogentco.com (154.54.11.214) 39.286 ms 38.188 ms 37.530 ms 20 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 33.148 ms 37.066 ms 35.823 ms 21 * uslec.iad01.atlas.cogentco.com (154.54.11.214) 38.403 ms 37.534 ms 22 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 35.051 ms 33.120 ms 34.209 ms 23 uslec.iad01.atlas.cogentco.com (154.54.11.214) 39.112 ms * * 24 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 34.603 ms 34.994 ms 34.119 ms 25 * uslec.iad01.atlas.cogentco.com (154.54.11.214) 36.929 ms 38.443 ms 26 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 34.784 ms 35.317 ms 33.839 ms 27 uslec.iad01.atlas.cogentco.com (154.54.11.214) 37.185 ms 38.327 ms 39.863 ms 28 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 35.362 ms 36.451 ms 34.788 ms 29 uslec.iad01.atlas.cogentco.com (154.54.11.214) 38.600 ms 39.782 ms 40.031 ms 30 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 38.156 ms 39.726 ms 35.726 ms 31 uslec.iad01.atlas.cogentco.com (154.54.11.214) 47.281 ms 37.617 ms 49.460 ms 32 gi9-16.mpd01.iad01.atlas.cogentco.com (154.54.11.213) 35.389 ms 35.988 ms 35.609 ms 33 uslec.iad01.atlas.cogentco.com (154.54.11.214) 39.162 ms 121.744 ms^C - - - - Joshua Fiske '03, '04 Network and Security Engineer Clarkson University, Office of Information Technology (315) 268-6722 -- Fax: (315) 268-6570 GPG Key: http://clarkson.edu/~jfiske/jfiske_pub.asc jfiske@clarkson.edu CONFIDENTIALITY: This e-mail (including any attachments) may contain confidential, proprietary and privileged information, and unauthorized disclosure or use is prohibited. If you received this e-mail in error, please notify the sender and delete this e-mail from your system. _______________________________________________ outages mailing list outages@isotf.org https://puck.nether.net/mailman/listinfo/outages
participants (9)
-
Daniel Corbe -
Daniel Corbe -
Darrell Hyde -
Frank Bulk - iNAME -
Gerry Boudreaux -
Jay Hennigan -
Jeremy Chadwick -
Joe Abley -
Josh Fiske