[  511.810877] bond0: (slave eth0): making interface the new active one
[  511.810959] bond0: (slave eth0): Enslaving as an active interface with an up link
[  516.058469] bond0: (slave eth0): Releasing backup interface
[  516.166978] bond0: (slave eth0): Enslaving as an active interface with an up link
[  520.348034] bond0: (slave eth0): Releasing backup interface