[  509.918880] bond0: (slave eth0): making interface the new active one
[  509.918983] bond0: (slave eth0): Enslaving as an active interface with an up link
[  514.132930] bond0: (slave eth0): Releasing backup interface
[  514.205924] bond0: (slave eth0): Enslaving as an active interface with an up link
[  518.354201] bond0: (slave eth0): Releasing backup interface
[  518.398165] bond0 (unregistering): Released all slaves