no routing after upgrade
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I recently upgraded from 2.4.3 to 2.4.4. My config has been working great for a few years with regular updates going smoothly and uneventful. After latest upgrade, the router comes up, both interfaces work, and I can login. But, it doesn't see to route any traffic. I took a config backup and reset to defaults and it works fine. But, when I reapply backup config, same problem. Where do I begin to diagnose?