[  521.716289] bond0: (slave eth0): making interface the new active one
[  521.716416] bond0: (slave eth0): Enslaving as an active interface with an up link
[  525.906396] bond0: (slave eth0): Releasing backup interface
[  525.997090] bond0: (slave eth0): Enslaving as an active interface with an up link
[  530.195917] bond0: (slave eth0): Releasing backup interface
[  530.233601] bond0 (unregistering): Released all slaves