[  520.380857] bond0: (slave eth0): making interface the new active one
[  520.380985] bond0: (slave eth0): Enslaving as an active interface with an up link
[  524.554625] bond0: (slave eth0): Releasing backup interface
[  524.615922] bond0: (slave eth0): Enslaving as an active interface with an up link
[  528.785623] bond0: (slave eth0): Releasing backup interface
[  528.826215] bond0 (unregistering): Released all slaves