[  504.171947] bond0: (slave eth0): making interface the new active one
[  504.172046] bond0: (slave eth0): Enslaving as an active interface with an up link
[  508.370416] bond0: (slave eth0): Releasing backup interface
[  508.463318] bond0: (slave eth0): Enslaving as an active interface with an up link
[  512.664734] bond0: (slave eth0): Releasing backup interface
[  512.694731] bond0 (unregistering): Released all slaves