[  517.666432] bond0: (slave eth0): making interface the new active one
[  517.666566] bond0: (slave eth0): Enslaving as an active interface with an up link
[  521.880013] bond0: (slave eth0): Releasing backup interface
[  521.963050] bond0: (slave eth0): Enslaving as an active interface with an up link
[  526.102375] bond0: (slave eth0): Releasing backup interface
[  526.137419] bond0 (unregistering): Released all slaves