[  503.779444] bond0: (slave eth0): making interface the new active one
[  503.779564] bond0: (slave eth0): Enslaving as an active interface with an up link
[  507.934329] bond0: (slave eth0): Releasing backup interface
[  508.012118] bond0: (slave eth0): Enslaving as an active interface with an up link
[  512.163871] bond0: (slave eth0): Releasing backup interface
[  512.198716] bond0 (unregistering): Released all slaves