[  512.963701] bond0: (slave eth0): making interface the new active one
[  512.963791] bond0: (slave eth0): Enslaving as an active interface with an up link
[  517.202867] bond0: (slave eth0): Releasing backup interface
[  517.307883] bond0: (slave eth0): Enslaving as an active interface with an up link
[  521.495860] bond0: (slave eth0): Releasing backup interface
[  521.532935] bond0 (unregistering): Released all slaves