[  519.500565] bond0: (slave eth0): making interface the new active one
[  519.500696] bond0: (slave eth0): Enslaving as an active interface with an up link
[  523.664923] bond0: (slave eth0): Releasing backup interface
[  523.736081] bond0: (slave eth0): Enslaving as an active interface with an up link
[  527.882556] bond0: (slave eth0): Releasing backup interface
[  527.906528] bond0 (unregistering): Released all slaves