[  512.971239] bond0: (slave eth0): making interface the new active one
[  512.971318] bond0: (slave eth0): Enslaving as an active interface with an up link
[  517.213521] bond0: (slave eth0): Releasing backup interface
[  517.327768] bond0: (slave eth0): Enslaving as an active interface with an up link
[  521.561091] bond0: (slave eth0): Releasing backup interface
[  521.586979] bond0 (unregistering): Released all slaves