[  517.649658] bond0: (slave eth0): making interface the new active one
[  517.649727] bond0: (slave eth0): Enslaving as an active interface with an up link
[  521.882532] bond0: (slave eth0): Releasing backup interface
[  521.986933] bond0: (slave eth0): Enslaving as an active interface with an up link
[  526.160971] bond0: (slave eth0): Releasing backup interface
[  526.188854] bond0 (unregistering): Released all slaves