[  519.049882] bond0: (slave eth0): making interface the new active one
[  519.049962] bond0: (slave eth0): Enslaving as an active interface with an up link
[  523.228455] bond0: (slave eth0): Releasing backup interface
[  523.316442] bond0: (slave eth0): Enslaving as an active interface with an up link
[  527.514685] bond0: (slave eth0): Releasing backup interface
[  527.545510] bond0 (unregistering): Released all slaves