[  512.234881] bond0: (slave eth0): making interface the new active one
[  512.234963] bond0: (slave eth0): Enslaving as an active interface with an up link
[  516.425481] bond0: (slave eth0): Releasing backup interface
[  516.491109] bond0: (slave eth0): Enslaving as an active interface with an up link
[  520.654299] bond0: (slave eth0): Releasing backup interface
[  520.683146] bond0 (unregistering): Released all slaves