[  517.592525] bond0: (slave eth0): making interface the new active one
[  517.592600] bond0: (slave eth0): Enslaving as an active interface with an up link
[  521.822750] bond0: (slave eth0): Releasing backup interface
[  521.925001] bond0: (slave eth0): Enslaving as an active interface with an up link
[  526.107207] bond0: (slave eth0): Releasing backup interface
[  526.131125] bond0 (unregistering): Released all slaves