[  512.395358] bond0: (slave eth0): making interface the new active one
[  512.395665] bond0: (slave eth0): Enslaving as an active interface with an up link
[  516.631393] bond0: (slave eth0): Releasing backup interface
[  516.731423] bond0: (slave eth0): Enslaving as an active interface with an up link
[  520.913646] bond0: (slave eth0): Releasing backup interface
[  520.942622] bond0 (unregistering): Released all slaves