[  512.334790] bond0: (slave eth0): making interface the new active one
[  512.334877] bond0: (slave eth0): Enslaving as an active interface with an up link
[  516.571092] bond0: (slave eth0): Releasing backup interface
[  516.677797] bond0: (slave eth0): Enslaving as an active interface with an up link
[  520.862079] bond0: (slave eth0): Releasing backup interface
[  520.894936] bond0 (unregistering): Released all slaves