[  519.081773] bond0: (slave eth0): making interface the new active one
[  519.081886] bond0: (slave eth0): Enslaving as an active interface with an up link
[  523.276182] bond0: (slave eth0): Releasing backup interface
[  523.349400] bond0: (slave eth0): Enslaving as an active interface with an up link
[  527.506906] bond0: (slave eth0): Releasing backup interface
[  527.535386] bond0 (unregistering): Released all slaves