[  515.758266] bond0: (slave eth0): making interface the new active one
[  515.758360] bond0: (slave eth0): Enslaving as an active interface with an up link
[  519.959365] bond0: (slave eth0): Releasing backup interface
[  520.072758] bond0: (slave eth0): Enslaving as an active interface with an up link
[  524.245939] bond0: (slave eth0): Releasing backup interface
[  524.273870] bond0 (unregistering): Released all slaves