[  517.613666] bond0: (slave eth0): making interface the new active one
[  517.613752] bond0: (slave eth0): Enslaving as an active interface with an up link
[  521.814151] bond0: (slave eth0): Releasing backup interface
[  521.877961] bond0: (slave eth0): Enslaving as an active interface with an up link
[  526.047419] bond0: (slave eth0): Releasing backup interface
[  526.075360] bond0 (unregistering): Released all slaves