[  521.606100] bond0: (slave eth0): making interface the new active one
[  521.606184] bond0: (slave eth0): Enslaving as an active interface with an up link
[  525.857668] bond0: (slave eth0): Releasing backup interface
[  525.978295] bond0: (slave eth0): Enslaving as an active interface with an up link
[  530.197007] bond0: (slave eth0): Releasing backup interface
[  530.222940] bond0 (unregistering): Released all slaves