[  520.960855] bond0: (slave eth0): making interface the new active one
[  520.960991] bond0: (slave eth0): Enslaving as an active interface with an up link
[  525.139768] bond0: (slave eth0): Releasing backup interface
[  525.219741] bond0: (slave eth0): Enslaving as an active interface with an up link
[  529.366452] bond0: (slave eth0): Releasing backup interface
[  529.395242] bond0 (unregistering): Released all slaves