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
We have contacted BTW and they state that they are not aware of what caused this blip however they have had other reports from other customers reporting the same issue.
As such an issue raised and a RFO has been raised with their TSO team to investigate.
RFO investigations last for up to 5 days.
We will update this status as and when we recieve any further information.
BT have come back to us and confirmed that this work was due to planned works their side.
We are requesting why we were not informed of this planned worked and why BGP was not shutdown cleanly prior to this work.