[  517.359443] bond0: (slave eth0): making interface the new active one
[  517.359565] bond0: (slave eth0): Enslaving as an active interface with an up link
[  521.649860] bond0: (slave eth0): Releasing backup interface
[  521.764731] bond0: (slave eth0): Enslaving as an active interface with an up link
[  525.999563] bond0: (slave eth0): Releasing backup interface
[  526.036470] bond0 (unregistering): Released all slaves