[  513.067551] bond0: (slave eth0): making interface the new active one
[  513.067707] bond0: (slave eth0): Enslaving as an active interface with an up link
[  517.428681] bond0: (slave eth0): Releasing backup interface
[  517.597142] bond0: (slave eth0): Enslaving as an active interface with an up link
[  521.813831] bond0: (slave eth0): Releasing backup interface
[  521.842801] bond0 (unregistering): Released all slaves