[  515.371836] bond0: (slave eth0): making interface the new active one
[  515.371927] bond0: (slave eth0): Enslaving as an active interface with an up link
[  519.579572] bond0: (slave eth0): Releasing backup interface
[  519.678439] bond0: (slave eth0): Enslaving as an active interface with an up link
[  523.869145] bond0: (slave eth0): Releasing backup interface
[  523.897045] bond0 (unregistering): Released all slaves