A part of a change to BT's UK core network they are performing work that will, unfortunately, impact all our BT DSL services (ADSL, FTTC G.FAST, FTTP) in the early hours of 18th August as follows:
BT are upgrading some 21C network software in Multiple Sites. The outage to all customers will be approx 15 minutes whilst the device is rebooted. This could extend to 1 hour if roll back is required to reboot to the old code. The downtime will start some time after 01:00 We plan to be finished by 04:00 , however if we encounter additional problems, service outage could extend to 06:00
For resilience, we have separate links to BT which are provided in different datacentres and which lead back to different BT exchanges. This should mean than we can carry on working during BT planned works or core network outages, however this is not the case this time. We are disappointed that this work is seemingly needed to be done to all our links to BT at the same time.
Customers with services via TalkTalk will be unaffected by this.
To increase our capacity we are adding three additional LNS routers. These are the routers that broadband lines connect to.
New connections from this afternoon may land on these but we will be performing a 're-balance' of all lines over all our LNSs next week during the early hours of the mornings. This involves forcing connection to re-connect (PPP Kill) and so will mean a brief interruption to service from 4AM.
We had problems overnight with one of our interconnects to BT. This resulted in a large number of BT lines dropping and reconnecting. Due to that way that reconnects work in this situation we have a higher than normal number lines on a single LNS (router) at our side.
So as to avoid these lines from experiencing congestion we plan to force them to reconnect to the correct LNS from 17:30 this evening. This will mean a PPP drop and reconnect for these affected lines resulting in loss of service whilst the customer router reconnects. This would take between a few seconds and a minute depending on the router at the customer side.