[  508.376538] bond0: (slave eth0): making interface the new active one
[  508.376615] bond0: (slave eth0): Enslaving as an active interface with an up link
[  512.528070] bond0: (slave eth0): Releasing backup interface
[  512.599288] bond0: (slave eth0): Enslaving as an active interface with an up link
[  516.762229] bond0: (slave eth0): Releasing backup interface
[  516.797309] bond0 (unregistering): Released all slaves