deleted the content under ~/Library/Caches, if that's not what you meant let me know. also another thing I noticed is initially on replugging the cable Ethernet is Red (not connected) under network preferences, and after 30 seconds it turns to yellow (Self-Assigned IP). after that yellow it turns to green after random time, because one time it took ~15 seconds and another time it took ~2 minutes. so in short it is actually working but there's random delay. not connecting instantly.