[  503.027399] bond0: (slave eth0): making interface the new active one
[  503.027490] bond0: (slave eth0): Enslaving as an active interface with an up link
[  507.221047] bond0: (slave eth0): Releasing backup interface
[  507.291876] bond0: (slave eth0): Enslaving as an active interface with an up link
[  511.443564] bond0: (slave eth0): Releasing backup interface
[  511.471462] bond0 (unregistering): Released all slaves