[  514.171115] bond0: (slave eth0): making interface the new active one
[  514.171268] bond0: (slave eth0): Enslaving as an active interface with an up link
[  518.358329] bond0: (slave eth0): Releasing backup interface
[  518.430493] bond0: (slave eth0): Enslaving as an active interface with an up link
[  522.574174] bond0: (slave eth0): Releasing backup interface
[  522.601166] bond0 (unregistering): Released all slaves