[  515.762071] bond0: (slave eth0): making interface the new active one
[  515.762189] bond0: (slave eth0): Enslaving as an active interface with an up link
[  519.953301] bond0: (slave eth0): Releasing backup interface
[  520.028223] bond0: (slave eth0): Enslaving as an active interface with an up link
[  524.182102] bond0: (slave eth0): Releasing backup interface