[  515.164319] bond0: (slave eth0): making interface the new active one
[  515.164410] bond0: (slave eth0): Enslaving as an active interface with an up link
[  519.383830] bond0: (slave eth0): Releasing backup interface
[  519.477937] bond0: (slave eth0): Enslaving as an active interface with an up link
[  523.668862] bond0: (slave eth0): Releasing backup interface
[  523.695808] bond0 (unregistering): Released all slaves