[  513.602804] bond0: (slave eth0): making interface the new active one
[  513.602880] bond0: (slave eth0): Enslaving as an active interface with an up link
[  517.851508] bond0: (slave eth0): Releasing backup interface
[  517.947619] bond0: (slave eth0): Enslaving as an active interface with an up link
[  522.144132] bond0: (slave eth0): Releasing backup interface