[  504.394469] bond0: (slave eth0): making interface the new active one
[  504.394604] bond0: (slave eth0): Enslaving as an active interface with an up link
[  508.568620] bond0: (slave eth0): Releasing backup interface
[  508.661378] bond0: (slave eth0): Enslaving as an active interface with an up link
[  512.854812] bond0: (slave eth0): Releasing backup interface
[  512.876738] bond0 (unregistering): Released all slaves