[  510.071112] bond0: (slave eth0): making interface the new active one
[  510.071200] bond0: (slave eth0): Enslaving as an active interface with an up link
[  514.259739] bond0: (slave eth0): Releasing backup interface
[  514.358398] bond0: (slave eth0): Enslaving as an active interface with an up link
[  518.543733] bond0: (slave eth0): Releasing backup interface
[  518.563705] bond0 (unregistering): Released all slaves