[  515.513369] bond0: (slave eth0): making interface the new active one
[  515.513457] bond0: (slave eth0): Enslaving as an active interface with an up link
[  519.775396] bond0: (slave eth0): Releasing backup interface
[  519.879429] bond0: (slave eth0): Enslaving as an active interface with an up link
[  524.053989] bond0: (slave eth0): Releasing backup interface
[  524.077968] bond0 (unregistering): Released all slaves