[  512.226714] bond0: (slave eth0): making interface the new active one
[  512.226784] bond0: (slave eth0): Enslaving as an active interface with an up link
[  516.438765] bond0: (slave eth0): Releasing backup interface
[  516.542215] bond0: (slave eth0): Enslaving as an active interface with an up link
[  520.730862] bond0: (slave eth0): Releasing backup interface
[  520.772708] bond0 (unregistering): Released all slaves