[  512.901400] bond0: (slave eth0): making interface the new active one
[  512.901494] bond0: (slave eth0): Enslaving as an active interface with an up link
[  517.146503] bond0: (slave eth0): Releasing backup interface
[  517.267286] bond0: (slave eth0): Enslaving as an active interface with an up link
[  521.431140] bond0: (slave eth0): Releasing backup interface
[  521.465007] bond0 (unregistering): Released all slaves