[  523.639472] bond0: (slave eth0): making interface the new active one
[  523.639579] bond0: (slave eth0): Enslaving as an active interface with an up link
[  527.819634] bond0: (slave eth0): Releasing backup interface
[  527.884002] bond0: (slave eth0): Enslaving as an active interface with an up link
[  532.045880] bond0: (slave eth0): Releasing backup interface