Do you have multiple NIC? I sporadically run into issues where traffic will try to route itself via a secondary network which has limited external access and it is resolved in a similar manner, by bringing down all networks, then re-starting them in a specific order.
Realistically I should probably define some static routes, but it works automatically 99% of the time so I never bother.
If this sounds like a possible cause, check your routes while in failed, and functional states, and set static routes as needed to resolve.
Do you have multiple NIC? I sporadically run into issues where traffic will try to route itself via a secondary network which has limited external access and it is resolved in a similar manner, by bringing down all networks, then re-starting them in a specific order.
Realistically I should probably define some static routes, but it works automatically 99% of the time so I never bother.
If this sounds like a possible cause, check your routes while in failed, and functional states, and set static routes as needed to resolve.