[  508.578813] bond0: (slave eth0): making interface the new active one
[  508.578925] bond0: (slave eth0): Enslaving as an active interface with an up link
[  512.787257] bond0: (slave eth0): Releasing backup interface
[  512.872306] bond0: (slave eth0): Enslaving as an active interface with an up link
[  517.012545] bond0: (slave eth0): Releasing backup interface
[  517.029431] bond0 (unregistering): Released all slaves