Large Increase in RTT from South Africa to CERN, April 2006Les Cottrell. Page created: May10, 2006Central Computer Access | Computer Networking | Network Group | More case studies |
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We used reverse traceroute servers at CERN and South Africa to look in more detail. The traceroutes from CERN to South Africa and vice versa confirmed the large round trip times. We looked at the traceroute from South Africa to DESY and this showe a shorter min-RTT. The CERN-South Africa route was via Abilene in the U.S. while the DESY route was more direct via GEANT.
Regarding South Africa, this can explain the change: http://members.internet2.edu/newsletter.cfm?date=2006-04-01#524. Now we've changed the policies with Abilene, and South Africa is back to Geant.Basically after March 22nd Abilene started exchanging traffic with TENET through the MAN LAN international exchange point in New York City.