[  503.869971] bond0: (slave eth0): making interface the new active one
[  503.870077] bond0: (slave eth0): Enslaving as an active interface with an up link
[  508.051355] bond0: (slave eth0): Releasing backup interface
[  508.132614] bond0: (slave eth0): Enslaving as an active interface with an up link
[  512.276522] bond0: (slave eth0): Releasing backup interface
[  512.298214] bond0 (unregistering): Released all slaves