[  507.238168] bond0: (slave eth0): making interface the new active one
[  507.238285] bond0: (slave eth0): Enslaving as an active interface with an up link
[  511.431263] bond0: (slave eth0): Releasing backup interface
[  511.511051] bond0: (slave eth0): Enslaving as an active interface with an up link
[  515.658670] bond0: (slave eth0): Releasing backup interface
[  515.685392] bond0 (unregistering): Released all slaves