[  515.215675] bond0: (slave eth0): making interface the new active one
[  515.215770] bond0: (slave eth0): Enslaving as an active interface with an up link
[  519.449009] bond0: (slave eth0): Releasing backup interface
[  519.566413] bond0: (slave eth0): Enslaving as an active interface with an up link
[  523.741081] bond0: (slave eth0): Releasing backup interface
[  523.780953] bond0 (unregistering): Released all slaves