[  511.156418] bond0: (slave eth0): making interface the new active one
[  511.156497] bond0: (slave eth0): Enslaving as an active interface with an up link
[  515.349941] bond0: (slave eth0): Releasing backup interface
[  515.434428] bond0: (slave eth0): Enslaving as an active interface with an up link
[  519.633887] bond0: (slave eth0): Releasing backup interface
[  519.665946] bond0 (unregistering): Released all slaves