[  519.036422] bond0: (slave eth0): making interface the new active one
[  519.036522] bond0: (slave eth0): Enslaving as an active interface with an up link
[  523.213462] bond0: (slave eth0): Releasing backup interface
[  523.287581] bond0: (slave eth0): Enslaving as an active interface with an up link
[  527.442302] bond0: (slave eth0): Releasing backup interface
[  527.472211] bond0 (unregistering): Released all slaves