On 09/10/19 at 02:11 our monitoring picked up that a few thousand broadband lines dropped.
After some investigation it appears the drops occurred due to all the B-sides of our BTW hostlinks flapping causing all sessions over these links to re-establish
Lines did immediately start to reconnect over our other hostlinks; however due to the number of attempted re-connections in some cases it took ~30minutes for lines reconnect
We are not aware of any BTW planned works scheduled for this time and are currently chasing BT for an explanation for this blip
Since roughly 13:43 it was noticed that a lot of our TT DSL lines were flapping.
After initial investigation we have concluded our physical fibres and BGP sessions have remained up. Therefore we believe the issue to be within TalkTalk's network.
We are chasing TT at the moment.
We are seeing a denial of service attack, which is causing more problems that usual, and this is disrupting traffic to some customers - but it is moving, and so different customers at different times.
Obviously we are working on this, and unfortunately cannot say a lot more of the details.