[  503.753876] bond0: (slave eth0): making interface the new active one
[  503.753958] bond0: (slave eth0): Enslaving as an active interface with an up link
[  507.925552] bond0: (slave eth0): Releasing backup interface
[  508.007748] bond0: (slave eth0): Enslaving as an active interface with an up link
[  512.145470] bond0: (slave eth0): Releasing backup interface
[  512.175333] bond0 (unregistering): Released all slaves