[  517.794640] bond0: (slave eth0): making interface the new active one
[  517.794731] bond0: (slave eth0): Enslaving as an active interface with an up link
[  522.005484] bond0: (slave eth0): Releasing backup interface
[  522.100409] bond0: (slave eth0): Enslaving as an active interface with an up link
[  526.299050] bond0: (slave eth0): Releasing backup interface