[  517.195129] bond0: (slave eth0): making interface the new active one
[  517.195242] bond0: (slave eth0): Enslaving as an active interface with an up link
[  521.353232] bond0: (slave eth0): Releasing backup interface
[  521.411361] bond0: (slave eth0): Enslaving as an active interface with an up link
[  525.584999] bond0: (slave eth0): Releasing backup interface