[  512.038588] bond0: (slave eth0): making interface the new active one
[  512.038660] bond0: (slave eth0): Enslaving as an active interface with an up link
[  516.249232] bond0: (slave eth0): Releasing backup interface
[  516.343527] bond0: (slave eth0): Enslaving as an active interface with an up link
[  520.528088] bond0: (slave eth0): Releasing backup interface
[  520.573070] bond0 (unregistering): Released all slaves