[  514.800013] bond0: (slave eth0): making interface the new active one
[  514.800093] bond0: (slave eth0): Enslaving as an active interface with an up link
[  519.000664] bond0: (slave eth0): Releasing backup interface
[  519.074976] bond0: (slave eth0): Enslaving as an active interface with an up link
[  523.230211] bond0: (slave eth0): Releasing backup interface