[  520.293056] bond0: (slave eth0): making interface the new active one
[  520.293137] bond0: (slave eth0): Enslaving as an active interface with an up link
[  524.511309] bond0: (slave eth0): Releasing backup interface
[  524.623973] bond0: (slave eth0): Enslaving as an active interface with an up link
[  528.867103] bond0: (slave eth0): Releasing backup interface
[  528.893055] bond0 (unregistering): Released all slaves