[  511.992976] bond0: (slave eth0): making interface the new active one
[  511.993036] bond0: (slave eth0): Enslaving as an active interface with an up link
[  516.183991] bond0: (slave eth0): Releasing backup interface
[  516.292359] bond0: (slave eth0): Enslaving as an active interface with an up link
[  520.466984] bond0: (slave eth0): Releasing backup interface
[  520.494917] bond0 (unregistering): Released all slaves