[  519.384506] bond0: (slave eth0): making interface the new active one
[  519.384590] bond0: (slave eth0): Enslaving as an active interface with an up link
[  523.561262] bond0: (slave eth0): Releasing backup interface
[  523.629336] bond0: (slave eth0): Enslaving as an active interface with an up link
[  527.785438] bond0: (slave eth0): Releasing backup interface
[  527.812380] bond0 (unregistering): Released all slaves