The report from renesys states that
"We initially stated that Sudan’s outage began at 12:47 UTC because that was when virtually all Sudanese routed networks were withdrawn from the global routing table. However once we plotted our active data measurement data, we observed traffic into Sudan dropping off dramatically 2.5 hours earlier at 10.23 UTC"
Sudan has 3 carriers: Sudatel, Zain and Canar
PingER was actively monitoring one host in the Sudan. It waswww.sustech.edu (18.104.22.168, AS 37197 Sudan Educational network) at the Sudan University of Science and Technology
From the traceroute it appears to be currently on the Canar network, see hop 8-11 (on AS 33788/Canar) below:
Looking at the traceroutes for the last 3 days sustech was reached via Canar (AS 33788) at hop 9 and today at at least one time it did not reach canar until hop 22, see below
The PingER plot of the data is seen below, the spreadsheet is here.
The loss of connectivity (RTT=unknown=0, loss=100%) is seen between 8:00 and 8:30am September 25th GMT, there is a recovery between 9:00 and 10:15, and then a further loss of connectivity until 13:00. The drops in minimum RTT from ~280ms to ~230ms is probably due to the use of an alternate route. Below is another plot of the data.
Looking at a table of the actual data below:
indicates no connectivity at 10:30 on through 12:30 with connectivity being restored by 13:02.
The fact the no connectivity (100% loss) for Sustech does not follow that for Canar, probably indicates that the routes changed as the existing one failed and a new one was found. The potential routes are seen below: