[  520.640351] bond0: (slave eth0): making interface the new active one
[  520.640419] bond0: (slave eth0): Enslaving as an active interface with an up link
[  524.810814] bond0: (slave eth0): Releasing backup interface
[  524.885279] bond0: (slave eth0): Enslaving as an active interface with an up link
[  529.042670] bond0: (slave eth0): Releasing backup interface
[  529.090660] bond0 (unregistering): Released all slaves