[  513.471349] bond0: (slave eth0): making interface the new active one
[  513.471445] bond0: (slave eth0): Enslaving as an active interface with an up link
[  517.715343] bond0: (slave eth0): Releasing backup interface
[  517.833890] bond0: (slave eth0): Enslaving as an active interface with an up link
[  521.997768] bond0: (slave eth0): Releasing backup interface
[  522.023177] bond0 (unregistering): Released all slaves