[  503.584731] bond0: (slave eth0): making interface the new active one
[  503.584835] bond0: (slave eth0): Enslaving as an active interface with an up link
[  507.792860] bond0: (slave eth0): Releasing backup interface
[  507.863380] bond0: (slave eth0): Enslaving as an active interface with an up link
[  512.020454] bond0: (slave eth0): Releasing backup interface
[  512.063421] bond0 (unregistering): Released all slaves