[  515.488540] bond0: (slave eth0): making interface the new active one
[  515.488612] bond0: (slave eth0): Enslaving as an active interface with an up link
[  519.703001] bond0: (slave eth0): Releasing backup interface
[  519.801282] bond0: (slave eth0): Enslaving as an active interface with an up link
[  523.988994] bond0: (slave eth0): Releasing backup interface
[  524.013921] bond0 (unregistering): Released all slaves