[  512.768118] bond0: (slave eth0): making interface the new active one
[  512.768193] bond0: (slave eth0): Enslaving as an active interface with an up link
[  517.014268] bond0: (slave eth0): Releasing backup interface
[  517.122733] bond0: (slave eth0): Enslaving as an active interface with an up link
[  521.301987] bond0: (slave eth0): Releasing backup interface
[  521.336955] bond0 (unregistering): Released all slaves