[  515.404404] bond0: (slave eth0): making interface the new active one
[  515.404541] bond0: (slave eth0): Enslaving as an active interface with an up link
[  519.571566] bond0: (slave eth0): Releasing backup interface
[  519.661676] bond0: (slave eth0): Enslaving as an active interface with an up link
[  523.866276] bond0: (slave eth0): Releasing backup interface
[  523.886105] bond0 (unregistering): Released all slaves