[  504.406019] bond0: (slave eth0): making interface the new active one
[  504.406147] bond0: (slave eth0): Enslaving as an active interface with an up link
[  508.639065] bond0: (slave eth0): Releasing backup interface
[  508.729820] bond0: (slave eth0): Enslaving as an active interface with an up link
[  512.928519] bond0: (slave eth0): Releasing backup interface
[  512.963537] bond0 (unregistering): Released all slaves