[  514.506345] bond0: (slave eth0): making interface the new active one
[  514.506479] bond0: (slave eth0): Enslaving as an active interface with an up link
[  518.675334] bond0: (slave eth0): Releasing backup interface
[  518.759272] bond0: (slave eth0): Enslaving as an active interface with an up link
[  522.906998] bond0: (slave eth0): Releasing backup interface
[  522.940434] bond0 (unregistering): Released all slaves