[  519.290928] bond0: (slave eth0): making interface the new active one
[  519.291027] bond0: (slave eth0): Enslaving as an active interface with an up link
[  523.488028] bond0: (slave eth0): Releasing backup interface
[  523.564389] bond0: (slave eth0): Enslaving as an active interface with an up link
[  527.716381] bond0: (slave eth0): Releasing backup interface
[  527.748173] bond0 (unregistering): Released all slaves