[  520.050042] bond0: (slave eth0): making interface the new active one
[  520.050131] bond0: (slave eth0): Enslaving as an active interface with an up link
[  524.231534] bond0: (slave eth0): Releasing backup interface
[  524.289540] bond0: (slave eth0): Enslaving as an active interface with an up link
[  528.455577] bond0: (slave eth0): Releasing backup interface
[  528.482527] bond0 (unregistering): Released all slaves