We are seeing packet loss at peak times on some lines on the Crouch End exchange. It's a small number of customers, and it looks like a congested SVLAN. This has been reported to BT.
Initially BT were unable to see any problem, their monitoring was not showing any congestion and they wanted us to report individual line faults rather than this being dealt as a specific BT network problem. However we have spoken to another ISP who confirms the problem. BT have now opened an Incident and will be investigating.
We have passed all our circuit details and graphs to proactive to investigate.
TSO will investigate overnight
No updates from TSO, proactive are chasing.
There is still congestion, we are chasing BT again.
Appears the issue is on the MSE router. Lines connected to the MSE are due to be migrated on 21st March however BT are hoping to get this done by 21th March.
All lines on the Crouch End exchange are now showing clear.