[  503.324500] bond0: (slave eth0): making interface the new active one
[  503.324594] bond0: (slave eth0): Enslaving as an active interface with an up link
[  507.477125] bond0: (slave eth0): Releasing backup interface
[  507.552334] bond0: (slave eth0): Enslaving as an active interface with an up link
[  511.699332] bond0: (slave eth0): Releasing backup interface
[  511.725279] bond0 (unregistering): Released all slaves