[  512.632657] bond0: (slave eth0): making interface the new active one
[  512.632759] bond0: (slave eth0): Enslaving as an active interface with an up link
[  516.885390] bond0: (slave eth0): Releasing backup interface
[  517.012451] bond0: (slave eth0): Enslaving as an active interface with an up link
[  521.247068] bond0: (slave eth0): Releasing backup interface