[  509.725839] bond0: (slave eth0): making interface the new active one
[  509.725920] bond0: (slave eth0): Enslaving as an active interface with an up link
[  513.946644] bond0: (slave eth0): Releasing backup interface
[  514.055696] bond0: (slave eth0): Enslaving as an active interface with an up link
[  518.229903] bond0: (slave eth0): Releasing backup interface
[  518.257921] bond0 (unregistering): Released all slaves