I have a backbone interface between switches, that according to SolarWinds, keeps going yellow/grey - and changes the higher layer map colors to yellow. But according to the interface page, there's nothing wrong with it except "interface downtime" - yet when I dive into it, utilization is low, and there are ZERO errors. On the actual switch, there's no drops, no errors, nothing in syslog about the interface going down. I'm also showing my warning thresholds - I can adjust them, but why should I have to for this ONE interface!?!?