[  505.503868] bond0: (slave eth0): making interface the new active one
[  505.503990] bond0: (slave eth0): Enslaving as an active interface with an up link
[  509.713339] bond0: (slave eth0): Releasing backup interface
[  509.796348] bond0: (slave eth0): Enslaving as an active interface with an up link
[  513.944644] bond0: (slave eth0): Releasing backup interface
[  513.975470] bond0 (unregistering): Released all slaves