[  520.357950] bond0: (slave eth0): making interface the new active one
[  520.358094] bond0: (slave eth0): Enslaving as an active interface with an up link
[  524.559225] bond0: (slave eth0): Releasing backup interface
[  524.632938] bond0: (slave eth0): Enslaving as an active interface with an up link
[  528.782479] bond0: (slave eth0): Releasing backup interface
[  528.807320] bond0 (unregistering): Released all slaves