[  512.203157] bond0: (slave eth0): making interface the new active one
[  512.203219] bond0: (slave eth0): Enslaving as an active interface with an up link
[  516.443579] bond0: (slave eth0): Releasing backup interface
[  516.552274] bond0: (slave eth0): Enslaving as an active interface with an up link
[  520.736186] bond0: (slave eth0): Releasing backup interface
[  520.769159] bond0 (unregistering): Released all slaves