[  517.304232] bond0: (slave eth0): making interface the new active one
[  517.304304] bond0: (slave eth0): Enslaving as an active interface with an up link
[  521.502808] bond0: (slave eth0): Releasing backup interface
[  521.603903] bond0: (slave eth0): Enslaving as an active interface with an up link
[  525.782052] bond0: (slave eth0): Releasing backup interface
[  525.815935] bond0 (unregistering): Released all slaves