Change in RTT
This plot below shows that the change from Satlink to terrestrial took place in a few steps. First on 14th Jan, one way route was changed to terrestial.
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 shows the traceroute when the first change occured. The packet goes from SLAC to a router in Sunnyvale (sunncr1-sunnsdn2.es.net) ; then to Florida (176.52.254.254 found using TULIP)
cant locate
176.52.249.97
or
84.16.8.106
both are in Europe according to GeoIPTool but seem to be in Latin America
and then goes through a node (200.0.16.105) on Satlink.
1-26-2013
1 rtr-servcore1-serv01-webserv.slac.stanford.edu (134.79.197.130) 0.395 ms
2 rtr-core1-p2p-servcore1.slac.stanford.edu (134.79.252.166) 0.305 ms
3 rtr-border1-p2p-core1.slac.stanford.edu (134.79.252.133) 139.355 ms
4 slac-mr2-p2p-rtr-border1.slac.stanford.edu (192.68.191.245) 0.266 ms
5 sunncr5-ip-a-slacmr2.es.net (134.55.36.21) 1.217 ms
6 sunnsdn2-ip-c-sunncr5.es.net (134.55.37.62) 11.184 ms
7 sunncr1-sdn-a-sunnsdn2.es.net (134.55.207.37) 0.996 ms
8 paixpart1-sunncr1.es.net (134.55.218.133) 1.531 ms
9 *
10 176.52.254.254 (176.52.254.254) 136.111 ms
11 (94.142.117.45) 111.241 ms
12 (84.16.8.106) 195.391 ms
13 200.0.16.105 (200.0.16.105) 201.607 ms
14 200.0.16.201 (200.0.16.201) 199.077 ms
15 200.0.16.201 (200.0.16.201) 199.501 ms
16 *
17 *
This is when the route first changed to terrestrial. It goes from Sunnyvale to Florida( 176.52.254.254 ) to Cuba ( 84.16.8.106 Telefonica ).
2-22-2013
1 rtr-servcore1-serv01-webserv.slac.stanford.edu (134.79.197.130) 0.369 ms
2 rtr-core1-p2p-servcore1.slac.stanford.edu (134.79.252.166) 0.566 ms
3 rtr-border1-p2p-core1.slac.stanford.edu (134.79.252.133) 0.402 ms
4 slac-mr2-p2p-rtr-border1.slac.stanford.edu (192.68.191.245) 0.258 ms
5 sunncr5-ip-a-slacmr2.es.net (134.55.36.21) 1.207 ms
6 sunnsdn2-ip-c-sunncr5.es.net (134.55.37.62) 0.886 ms
7 sunncr1-sdn-a-sunnsdn2.es.net (134.55.207.37) 0.986 ms
8 paixpart1-sunncr1.es.net (134.55.218.133) 1.534 ms
9 ge-1-3-0-132-100M.ar4.PAO2.gblx.net (208.50.13.53) 2.087 ms
10 so2-0-0-2488M.ar3.MIA1.gblx.net (67.17.109.230) 79.993 ms
11 NEWCOM-Miami.so-3-2-1.ar2.MIA1.gblx.net (64.209.103.174) 80.942 ms
12 mia-static-204-14-40-138.newcom-intl.com (204.14.40.138) 80.743 ms
13 newcom1.newcom-intl.com (204.14.40.1) 82.600 ms
14 mia-static-204-14-41-196.newcom-intl.com (204.14.41.196) 596.118 ms
15 200.0.16.102 (200.0.16.102) 596.798 ms
16 200.0.16.85 (200.0.16.85) 391.862 ms
17 200.0.16.201 (200.0.16.201) 390.459 ms
18 *
19 *
20 *
21 *
This is another route that still uses Satlink. It goes to Miami Florida and then moves to SAT.
4-16-2013
1 rtr-servcore1-serv01-webserv.slac.stanford.edu (134.79.197.130) 1.035 ms
2 rtr-core1-p2p-servcore1.slac.stanford.edu (134.79.252.166) 0.622 ms
3 rtr-border1-p2p-core1.slac.stanford.edu (134.79.252.133) 0.396 ms
4 slac-mr2-p2p-rtr-border1.slac.stanford.edu (192.68.191.245) 0.310 ms
5 *
6 paixpart1-sunncr1.es.net (134.55.218.133) 1.944 ms
7 *
8 xe7-1-3-0-grtmiabr7.red.telefonica-wholesale.net (84.16.14.154) 80.455 ms
9 Xe5-0-1-0-grtmiana2.red.telefonica-wholesale.net (94.142.122.249) 85.051 ms
10 GE6-0-0-0-gramiana2.red.telefonica-wholesale.net (94.142.121.133) 113.007 ms
11 176.52.249.29 (176.52.249.29) 113.601 ms
12 So3-0-0-0-graccsim2.red.telefonica-wholesale.net (94.142.123.190) 113.962 ms
13 5.53.0.134 (5.53.0.134) 144.770 ms
14 200.0.16.85 (200.0.16.85) 142.703 ms
15 200.0.16.201 (200.0.16.201) 142.668 ms
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.
