[  521.590383] bond0: (slave eth0): making interface the new active one
[  521.590461] bond0: (slave eth0): Enslaving as an active interface with an up link
[  525.779596] bond0: (slave eth0): Releasing backup interface
[  525.873777] bond0: (slave eth0): Enslaving as an active interface with an up link
[  530.069696] bond0: (slave eth0): Releasing backup interface
[  530.095632] bond0 (unregistering): Released all slaves