Showing posts with label renesys. Show all posts
Showing posts with label renesys. Show all posts
Sunday, December 1, 2013
One hour Cuban Internet outage
Wednesday, April 24, 2013
Has the ALBA-1 undersea cable changed anything?
In January, I posted a note about a blog post by Renesys analyst Doug Madory showing that Cuba had begun testing the ALBA-1 undersea cable. Madory's data shows the round trip "ping" times for packets traveling between Cuba and four other cities.
The slow speed data points (A) are using the old satellite links. The medium speed links (B) are asymmetric -- outbound via satellite and return through the cable. The high speed links (C) imply two way cable traffic.
A number of people commented on Madory's post, some indicating that they had indeed noticed faster speed in accessing Cuban servers, but, consistent with the Renesys data, others did not.
Madory updated the data in March. As we see here, the majority, though not 100 percent, of Telefonica traffic is being carried over the cable.
Regardless, if Cuba lacks the political will and domestic infrastructure to connect users to the cable, it will have little practical effect. The Cuban government has said the first applications of the cable would be those that benefit society. It seems to me that university and medical connectivity would fill that bill and be low-hanging fruit.
It has been three months since Madory first detected traffic. Has anyone noted any improvement in their service?
The slow speed data points (A) are using the old satellite links. The medium speed links (B) are asymmetric -- outbound via satellite and return through the cable. The high speed links (C) imply two way cable traffic.
A number of people commented on Madory's post, some indicating that they had indeed noticed faster speed in accessing Cuban servers, but, consistent with the Renesys data, others did not.
Madory updated the data in March. As we see here, the majority, though not 100 percent, of Telefonica traffic is being carried over the cable.
Regardless, if Cuba lacks the political will and domestic infrastructure to connect users to the cable, it will have little practical effect. The Cuban government has said the first applications of the cable would be those that benefit society. It seems to me that university and medical connectivity would fill that bill and be low-hanging fruit.
It has been three months since Madory first detected traffic. Has anyone noted any improvement in their service?
Tuesday, May 22, 2012
Hard data on the idle ALBA-1 undersea cable
I received an email today from Doug Madory of Renesys, a company that monitors the dynamic state of the global Internet.
Madory wrote that there is no evidence of a submarine cable in use in Cuba in 2012. He said that latencies to Cuba are very stable and clearly satellite (>480 ms). He attached the following visualizations (click to enlarge):
The numbers in the figure legends indicate the connecting autonomous networks -- CubaData (11960) is the state telecom of Cuba, and they have three satellite providers Tata (6453), Intelsat (22351) and NewCom (32034).
Renesys is "The Internet Intelligence Authority" -- they constantly monitor the state of the global Internet. You may have seen their reports of network outages when nations went off line during the Arab Spring, for example, this Syrian episode. You can get a sense of what they do by following their blog and Internet events bulletin.
Madory wrote that there is no evidence of a submarine cable in use in Cuba in 2012. He said that latencies to Cuba are very stable and clearly satellite (>480 ms). He attached the following visualizations (click to enlarge):
The numbers in the figure legends indicate the connecting autonomous networks -- CubaData (11960) is the state telecom of Cuba, and they have three satellite providers Tata (6453), Intelsat (22351) and NewCom (32034).
Renesys is "The Internet Intelligence Authority" -- they constantly monitor the state of the global Internet. You may have seen their reports of network outages when nations went off line during the Arab Spring, for example, this Syrian episode. You can get a sense of what they do by following their blog and Internet events bulletin.
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