[  519.451443] bond0: (slave eth0): making interface the new active one
[  519.451543] bond0: (slave eth0): Enslaving as an active interface with an up link
[  523.592972] bond0: (slave eth0): Releasing backup interface
[  523.657374] bond0: (slave eth0): Enslaving as an active interface with an up link
[  527.819730] bond0: (slave eth0): Releasing backup interface
[  527.856439] bond0 (unregistering): Released all slaves