I got this error message in the log:
ug 1 09:47:24.222: %LINK-3-UPDOWN: Interface GigabitEthernet4/4, changed state to upAug 1 09:47:24.220: %LINK-SP-3-UPDOWN: Interface GigabitEthernet4/4, changed state to upAug 1 09:47:27.170: %EC-SP-5-CANNOT_BUND...