[  513.029003] bond0: (slave eth0): making interface the new active one
[  513.029091] bond0: (slave eth0): Enslaving as an active interface with an up link
[  517.272656] bond0: (slave eth0): Releasing backup interface
[  517.376695] bond0: (slave eth0): Enslaving as an active interface with an up link
[  521.563991] bond0: (slave eth0): Releasing backup interface
[  521.590872] bond0 (unregistering): Released all slaves