[  519.126543] bond0: (slave eth0): making interface the new active one
[  519.126616] bond0: (slave eth0): Enslaving as an active interface with an up link
[  523.283998] bond0: (slave eth0): Releasing backup interface
[  523.364439] bond0: (slave eth0): Enslaving as an active interface with an up link
[  527.511323] bond0: (slave eth0): Releasing backup interface
[  527.538215] bond0 (unregistering): Released all slaves