BGP Data was affected for certain customers today beginning at 01:30 UTC.  

At 01:30 UTC on September 17, 2014, the team operating the RouteViews aggregators took steps to block traffic from an alleged abuser attempting to conduct a denial of service attack against their route collectors.  This information is published at www.routeviews.org/maintenance.html.  

During the mitigation steps, the collectors needed to re-establish connections with their peers.  This took some time, and during this window, the global BGP data shown by RouteViews was impacted.

Since ThousandEyes uses the RouteViews data as a principal data source for global BGP visibility, our services were impacted by this lack of availability, and in many cases, reachability alerts were triggered based on this lack of reachability data.  

Sample BGP Reachability timeline showing dip based on RouteViews collector sessions being reestablished

Based on all data available to us, these sessions were largely restored by 03:00 UTC on September 17, 2014.  

At this time we do not expect further issues to arise from the RouteViews' team's ongoing DoS mitigation efforts, or from our own platform's visibility of the public Internet.