...
On Aug 2, 2009 following an email from Don Riley who had detected that kdn.co.ke had dropped to 370ms. We were Unfortunately not monitoring kdn.co.ke. However on further investigation we found the RTT from SLAC to acheraarchitects.co.ke (see below) had changed between 14:00 and 17:00 hours 6/1/09 GMT from a steady 716 ms to a steady 325ms. This is exactly what one would expect as the route moves from a GEOS to a terrestrial line. The plot below shows the average RTT time series:
The traceroute from SLAC to Kenya went via ESnet to Sunyvale, then via Level3 to New York and London and thence to Kenya. The RTT between London and Kenya was about 200ms.
On Aug 1, 2009 at about 23:00 hours GMT the RTTs averaged over a day, from SLAC to www.ternet.or.tz ch changed from about 730ms to about 350ms 9see below(see below, note that the RTTs are truncated at about 900ms ). After about half a day it reverted back again. The traceroute when the RTT had reverted back shows the route going through Telia and Newskies, a satellite services provider.
On August 3, 15:00 hours www.ku.ac.ke dropped to about 370ms (see below), the earlier step change from 650ms to 550ms may have been since only one direction of the route was using the terrestrial line. A traceroute after the changeover shows the route going via ESnet to New York and via Level 3 onto London.
acheraarchitects.co.ke | www.ternet.or.tz (RTT truncated at 900ms) | www.ku.ac.ke |
|
| (untruncated) | www.ku.ac.ke | |
|---|---|---|---|---|---|---|---|
| |
| | | |
|
|
