Not sure what yet
Routers and LNSs are all up and did not restart or anything, not clear what happened yet.
The issue lasted a few minutes and seems to be over with services back to normal. So far we can see that a number of BGP sessions internal to the Telehouse rack restarted. It almost looks like a switch restart, but we are still checking.
Checks confirm nothing rebooted, not even one of the network switches, so it is not clear what happened at this stage, we are still investigating, but the problem itself is over at present.