[  501.662049] bond0: (slave eth0): making interface the new active one
[  501.662148] bond0: (slave eth0): Enslaving as an active interface with an up link
[  505.859970] bond0: (slave eth0): Releasing backup interface
[  505.933807] bond0: (slave eth0): Enslaving as an active interface with an up link
[  510.097027] bond0: (slave eth0): Releasing backup interface
[  510.132123] bond0 (unregistering): Released all slaves