[  520.313943] bond0: (slave eth0): making interface the new active one
[  520.314033] bond0: (slave eth0): Enslaving as an active interface with an up link
[  524.498436] bond0: (slave eth0): Releasing backup interface
[  524.574275] bond0: (slave eth0): Enslaving as an active interface with an up link
[  528.732660] bond0: (slave eth0): Releasing backup interface
[  528.757301] bond0 (unregistering): Released all slaves