[  512.494793] bond0: (slave eth0): making interface the new active one
[  512.494859] bond0: (slave eth0): Enslaving as an active interface with an up link
[  516.698930] bond0: (slave eth0): Releasing backup interface
[  516.800780] bond0: (slave eth0): Enslaving as an active interface with an up link
[  520.980977] bond0: (slave eth0): Releasing backup interface
[  521.014908] bond0 (unregistering): Released all slaves