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PerilFold: Egypt Returns 2 February 2011 ...more

Egypt returned to the Internet at 09:30 GMT 2 February 2011, 11:30AM Egyptian time:

Egypt Returns 2 February 2011

Figure 1: Egypt Returns 2 February 2011

Ellipses in these graphs represent servers; boxes represent routers; colors of boxes reflect ownership of parts of the network.
Arrows show the varying connectivity among them: green is fast, yellow is slow, orange is slower, and red is very slow.
Times are GMT.

Graphs were produced using PerilScope™, which is InternetPerils' interactive topology examination interface, based upon the GAIN platform.

The red octagons are six destinations InternetPerils was watching. All six destinations were unreachable up through 9:15 GMT, and are depicted in frames up to then showing nothing but gray arrows for no response, all the way from the camera.

First Returned

At 9:30 GMT three nodes show normal paths in Figure 2:
websrv.ahram.org.eg 163.121.116.16
www.cbe.org.eg 213.154.54.51
mail.ouda.org.eg 213.212.200.3
These first returned nodes are the same ones that were first off when Egypt disconnected on 27 January 2011.

2 February 2011 Three Egyptians nodes back online

Figure 2: 2 February 2011 Three Egyptian nodes back online

Note that this initial routing isn't really quite right yet. For example, the path to mail.ouda.org.eg goes through New York on FLAG (4.78.132.122 FLAG-TELECO.edge1.NewYork1.Level3.net) and hops the ocean (140 ms red arrow to 80.77.0.34), but gets no further (only grey arrows from there on), as seen in Figure 3:

2 February 2011 Routing attempt to Egypt through FLAG

Figure 3: 2 February 2011 Routing attempt to Egypt through FLAG

This timing of routing returns matches what RIPE saw in BGP route announcements from Egypt returning between 8:30 and 9:00 GMT 2 February 2011.

Normal Routing

Fifteen minutes later at 9:45 GMT, the other half of the destinations are reachable again, as shown in Figure 4:

Read the complete PerilWatch: Egypt Returns 2 February 2011