[  517.566236] bond0: (slave eth0): making interface the new active one
[  517.566326] bond0: (slave eth0): Enslaving as an active interface with an up link
[  521.743427] bond0: (slave eth0): Releasing backup interface
[  521.830380] bond0: (slave eth0): Enslaving as an active interface with an up link
[  525.966395] bond0: (slave eth0): Releasing backup interface
[  525.988278] bond0 (unregistering): Released all slaves