[  511.108689] bond0: (slave eth0): making interface the new active one
[  511.108769] bond0: (slave eth0): Enslaving as an active interface with an up link
[  515.357536] bond0: (slave eth0): Releasing backup interface
[  515.457422] bond0: (slave eth0): Enslaving as an active interface with an up link
[  519.645102] bond0: (slave eth0): Releasing backup interface
[  519.679948] bond0 (unregistering): Released all slaves