[  523.041120] bond0: (slave eth0): making interface the new active one
[  523.041251] bond0: (slave eth0): Enslaving as an active interface with an up link
[  527.250052] bond0: (slave eth0): Releasing backup interface
[  527.330050] bond0: (slave eth0): Enslaving as an active interface with an up link
[  531.481189] bond0: (slave eth0): Releasing backup interface