YorkHost - Notice history

Post-mortem: Loss of connectivity on 83.150.218.0/24

Duration: ~2 minutes (01:08 - 01:10)

Summary: A network loop was accidentally introduced by an external contractor during a maintenance intervention at approximately 01:10, causing a brief total loss of connectivity on the 83.150.218.0/24 & 217.145.72.0/24 subnet.

Timeline:

• 01:08 : Automatic alert triggered by Instatus monitoring, subnet 83.150.218.0/24 detected as down.

• 01:10 : Root cause identified and resolved: a network loop caused by an external contractor's intervention on-site.

• 01:15 : Incident officially marked as resolved after monitoring confirmed full recovery.

Root Cause: An external contractor performing on-site maintenance accidentally created a loopback on the network, which briefly turned our subnet into a very enthusiastic game of ping-pong with itself. Packets were having the time of their lives going in circles, unfortunately at the expense of actual connectivity.

Impact: Full outage on 83.150.218.0/24 for approximately 2 minutes. All services hosted on this subnet were temporarily unreachable.

Corrective actions:

• Loop was removed and connectivity restored immediately upon detection.

• Reminder sent to external contractors that cables, much like boomerangs, should not come back to where they started.

We are going to restart the docker of this node.

We are aware.