[  505.607367] bond0: (slave eth0): making interface the new active one
[  505.607447] bond0: (slave eth0): Enslaving as an active interface with an up link
[  509.777123] bond0: (slave eth0): Releasing backup interface
[  509.845511] bond0: (slave eth0): Enslaving as an active interface with an up link
[  514.001179] bond0: (slave eth0): Releasing backup interface
[  514.032176] bond0 (unregistering): Released all slaves