[  515.506268] bond0: (slave eth0): making interface the new active one
[  515.506351] bond0: (slave eth0): Enslaving as an active interface with an up link
[  519.775793] bond0: (slave eth0): Releasing backup interface
[  519.889310] bond0: (slave eth0): Enslaving as an active interface with an up link
[  524.126671] bond0: (slave eth0): Releasing backup interface
[  524.159045] bond0 (unregistering): Released all slaves