[  515.210712] bond0: (slave eth0): making interface the new active one
[  515.210777] bond0: (slave eth0): Enslaving as an active interface with an up link
[  519.373701] bond0: (slave eth0): Releasing backup interface
[  519.448825] bond0: (slave eth0): Enslaving as an active interface with an up link
[  523.604447] bond0: (slave eth0): Releasing backup interface