...
link to spreadsheet : http://www.slac.stanford.edu/xorg/icfa/icfa-net-paper-jan14/slaconly/cuba-minrtt-2013.xlsx
This figure shows that even though the minimum RTT has reduced, the jitter and packet Loss are both quite high.
Traceroutes
1-15-2013
1 rtr-servcore1-serv01-webserv.slac.stanford.edu (134.79.197.130) 0.652 ms
2 rtr-core1-p2p-servcore1.slac.stanford.edu (134.79.252.166) 0.302 ms
3 rtr-border1-p2p-core1.slac.stanford.edu (134.79.252.133) 0.519 ms
4 slac-mr2-p2p-rtr-border1.slac.stanford.edu (192.68.191.245) 0.261 ms
5 sunncr5-ip-a-slacmr2.es.net (134.55.36.21) 1.221 ms
6 sunnsdn2-ip-c-sunncr5.es.net (134.55.37.62) 0.922 ms
7 sunncr1-sunnsdn2.es.net (134.55.209.98) 1.178 ms
8 paixpart1-sunncr1.es.net (134.55.218.133) 1.583 ms
9 *
10 176.52.254.254 (176.52.254.254) 78.132 ms
11 176.52.249.97 (176.52.249.97) 106.149 ms
12 (84.16.8.106) 195.357 ms
13 (84.16.8.106) 190.959 ms
14 200.0.16.105 (200.0.16.105) 419.377 ms
15 *
16 *
17 *
...
This is the final shift to terrestial link. It goes from SLAC to sunnyvale then to Flordia (94.142.121.133 found using TULIP) and from here moves to Latin America (Cuba) on Fibre. This is just a different route. There are two carriers available i.e. Tata and Telefonica. Tata shows better latency than Telefonica. {Renesys}
Other hosts
Looking at www.uclv.edu.cu one can see a large step reduction in RTT around October 1st 2014.
It appears this host has much lower losses and jitter than the www.egrem.com.cu host seen below for thye saem time period
Looking back at the beginning of 2014 it can be seen that until about May 16, 2014 the performance to www.uclv.edu.cu was dreadful even though minimum RTTs were aroung 160ms.
