On August 6th, 2020, at 15:25 UTC, Linode’s network operations team were alerted to possible networking issues ongoing in our Frankfurt data center. Upon investigating, a line card in a core router had encountered an error and restarted itself. These routers are redundant and this failure should not have caused an outage. However, upon further investigation, it was discovered that a software misconfiguration caused the system to suspend the redundant links. The module completed its power cycle and service was returned at approximately 15:42 UTC. The line card has since been replaced and additional links have been added to prevent this type of failure in the future.