[  513.300560] bond0: (slave eth0): making interface the new active one
[  513.300638] bond0: (slave eth0): Enslaving as an active interface with an up link
[  517.531000] bond0: (slave eth0): Releasing backup interface
[  517.642329] bond0: (slave eth0): Enslaving as an active interface with an up link
[  521.820138] bond0: (slave eth0): Releasing backup interface
[  521.850056] bond0 (unregistering): Released all slaves