The data plane on ixp-kn7-sw1 crashed due to a currently unknown issue at 08:57 UTC. We were able to remotely power-cycle the switch and it was up and serving traffic again at 09:46 UTC.
The switch was planned to receive maintenance that would it had happened would had prevented the crash. Sadly, this incident occurred before the maintenance event.
Sorry for any inconvenience caused by this incident.