[  517.145784] bond0: (slave eth0): making interface the new active one
[  517.145853] bond0: (slave eth0): Enslaving as an active interface with an up link
[  521.380673] bond0: (slave eth0): Releasing backup interface
[  521.485401] bond0: (slave eth0): Enslaving as an active interface with an up link
[  525.664062] bond0: (slave eth0): Releasing backup interface
[  525.695193] bond0 (unregistering): Released all slaves