[  517.676391] bond0: (slave eth0): making interface the new active one
[  517.676530] bond0: (slave eth0): Enslaving as an active interface with an up link
[  521.947398] bond0: (slave eth0): Releasing backup interface
[  522.069506] bond0: (slave eth0): Enslaving as an active interface with an up link
[  526.238137] bond0: (slave eth0): Releasing backup interface
[  526.276109] bond0 (unregistering): Released all slaves