[  512.814721] bond0: (slave eth0): making interface the new active one
[  512.814791] bond0: (slave eth0): Enslaving as an active interface with an up link
[  517.009764] bond0: (slave eth0): Releasing backup interface
[  517.097770] bond0: (slave eth0): Enslaving as an active interface with an up link
[  521.292920] bond0: (slave eth0): Releasing backup interface
[  521.321923] bond0 (unregistering): Released all slaves