We are seeing some evening time congestion on all BT 21CN lines that connect through BRAS's 21CN-BRAS-RED1-MR-DH up to 21CN-BRAS-RED13-MR-DH I suspect one of the BT nodes is hitting limits some evenings as we don't see the higher latency every night. This has been reported into BT and we will update this past as soon as they respond back.
Here is an example graph
This has been escalated further to the BT networK guys and we can expect an update within the next few hours.
Work was done on this overnight so I will check again tomorrow morming and post another update.
The changes BT made over night have made a significant difference to the latency, still seeing it slightly higher than we would like so we will go back to then again.
Unfortunately the latency has increased again so whatever BT did two nights ago has not really helped. We are chasing again now.
BT have still not pinpointed the issue so it has been escalated further.
Latency is hardly noticeable now but we are still chasing BT on sorting the actual issue, update will be mOnday now.
BT have advised that they are aware of the congestion issue at Manchester, and the solution they have in place is to install some additional edge routers, they are already escalating on this to bring the date in early, currently the date is May. Obviously May is just not acceptable and we are doing all we can to get BT to bring this date forward.
We have requested a further escalation within BT, the time scales they have given for a fix is just not acceptable.
The last update from BT was 'is latency issue has been escalated to high level. BT TSO are currently working on a resolution and are hoping to move into the testing phase soon. We will keep you updated as we get more information' I am chasing for another update now.
We are still chasing BT up on bringing the 'fix' forward. Hopefully we will have another response by the morning.
The latest update from BT: We have identified a solution to the capacity issue identified and are looking to put in a solution this Friday night...
BT have added more capacity on tehir network and last night the latency looked fine. We will review this again on Monday.