[  520.546824] bond0: (slave eth0): making interface the new active one
[  520.546930] bond0: (slave eth0): Enslaving as an active interface with an up link
[  524.759560] bond0: (slave eth0): Releasing backup interface
[  524.869101] bond0: (slave eth0): Enslaving as an active interface with an up link
[  529.052582] bond0: (slave eth0): Releasing backup interface
[  529.077227] bond0 (unregistering): Released all slaves