[  515.777149] bond0: (slave eth0): making interface the new active one
[  515.777247] bond0: (slave eth0): Enslaving as an active interface with an up link
[  519.961350] bond0: (slave eth0): Releasing backup interface
[  520.071050] bond0: (slave eth0): Enslaving as an active interface with an up link
[  524.259039] bond0: (slave eth0): Releasing backup interface
[  524.286921] bond0 (unregistering): Released all slaves