There seems to have been some major issue over night with one of the LNSs in the new rack. Something odd with RADIUS from around 1am, and then lines dropping and reconnecting around 04:52. Graphs before 04:52 on one of the LNSs are lost as well. It seems problems persist with some BE lines though.
We are investigating.
We are switching lines to the right LNS now.
Stuck BE tunnels have been cleared and BE lines are all reconnecting now.
Looks like the issue here resulted in BT lines coming straight back, but BE lines not doing so. We now have all lines back.