SoX has new routing in AbileneJiri Navratil and Les Cottrell. Page created: June 6 2003.Central Computer Access | Computer Networking | Network Group | ICFA-NTF Monitoring |
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This case is another example of the possibilities how to discover such network changes via monitoring of available bandwidth. (See simmilar case: Daresbury-upgrade or Abilene in May )
In reality the path is much shorter now (from 17 to 11 hops) as can be seen from the folowing traceroutes:
##(07/23/2003 06:19:44 1058966384) traceroute to node1.sox.i2.edu ##(07/23/2003 06:19:44 1058966384) 1 rtr-gsr-test (134.79.243.1) 0.226 ms ##(07/23/2003 06:19:44 1058966384) 2 rtr-dmz1-ger (134.79.135.15) 0.299 ms ##(07/23/2003 06:19:44 1058966384) 3 i2-gateway.stanford.edu (192.68.191.83) 0.240 ms ##(07/23/2003 06:19:44 1058966384) 4 STAN.POS.calren2.NET (171.64.1.213) 0.379 ms ##(07/23/2003 06:19:44 1058966384) 5 SUNV--STAN.POS.calren2.net (198.32.249.73) 0.624 ms ##(07/23/2003 06:19:44 1058966384) 6 C2-QANH-GSR-QSV-GSR.ATM.calren2.net (198.32.249.154) 21.206 ms ##(07/23/2003 06:19:44 1058966384) 7 USC--QAnh.POS.calren2.net (198.32.248.18) 21.801 ms ##(07/23/2003 06:19:44 1058966384) 8 ISI--USC.POS.calren2.net (198.32.248.26) 22.418 ms ##(07/23/2003 06:19:44 1058966384) 9 UCLA--ISI.POS.calren2.net (198.32.248.30) 22.905 ms ##(07/23/2003 06:19:44 1058966384) 10 dc-lax-12410a--c2-ucla-gsr-atm.cenic.net (137.164.22.5) 23.927 ms ##(07/23/2003 06:19:44 1058966384) 11 hpr-lax-12410--dc-lax-12410a-ge.cenic.net (137.164.22.13) 24.065 ms ##(07/23/2003 06:19:44 1058966384) 12 abilene-LA--hpr-lax-gsr1-10ge.cenic.net (137.164.25.3) 16.318 ms ##(07/23/2003 06:19:44 1058966384) 13 hstnng-losang.abilene.ucaid.edu (198.32.8.22) 47.867 ms ##(07/23/2003 06:19:44 1058966384) 14 atlang-hstnng.abilene.ucaid.edu (198.32.8.34) 61.810 ms ##(07/23/2003 06:19:44 1058966384) 15 atla-atlang.abilene.ucaid.edu (198.32.11.109) 61.832 ms ##(07/23/2003 06:19:44 1058966384) 16 sox-rtr.abilene.sox.net (199.77.193.9) 62.302 ms ##(07/23/2003 06:19:44 1058966384) SUMMARY: numhops=17; ##(07/23/2003 07:49:22 1058971762) traceroute to node1.sox.i2.edu ##(07/23/2003 07:49:22 1058971762) 1 rtr-gsr-test (134.79.243.1) 0.293 ms ##(07/23/2003 07:49:22 1058971762) 2 rtr-dmz1-ger (134.79.135.15) 0.348 ms ##(07/23/2003 07:49:22 1058971762) 3 i2-gateway.stanford.edu (192.68.191.83) 0.242 ms ##(07/23/2003 07:49:22 1058971762) 4 STAN.POS.calren2.NET (171.64.1.213) 0.387 ms ##(07/23/2003 07:49:22 1058971762) 5 SUNV--STAN.POS.calren2.net (198.32.249.73) 0.742 ms ##(07/23/2003 07:49:22 1058971762) 6 Abilene--QSV.POS.calren2.net (198.32.249.162) 0.818 ms ##(07/23/2003 07:49:22 1058971762) 7 kscyng-snvang.abilene.ucaid.edu (198.32.8.103) 36.146 ms ##(07/23/2003 07:49:22 1058971762) 8 iplsng-kscyng.abilene.ucaid.edu (198.32.8.80) 45.389 ms ##(07/23/2003 07:49:22 1058971762) 9 atla-iplsng.abilene.ucaid.edu (198.32.8.78) 56.312 ms ##(07/23/2003 07:49:22 1058971762) 10 sox-rtr.abilene.sox.net (199.77.193.9) 56.662 ms ##(07/23/2003 09:20:13 1058977213) SUMMARY: numhops=11;If the changes are permanent or just for couple of days we will see in next days.
*jn* Page owner: Jiri Navratil