[  508.650937] bond0: (slave eth0): making interface the new active one
[  508.651010] bond0: (slave eth0): Enslaving as an active interface with an up link
[  512.854965] bond0: (slave eth0): Releasing backup interface
[  512.962123] bond0: (slave eth0): Enslaving as an active interface with an up link
[  517.147926] bond0: (slave eth0): Releasing backup interface
[  517.174846] bond0 (unregistering): Released all slaves