[  512.262644] bond0: (slave eth0): making interface the new active one
[  512.262744] bond0: (slave eth0): Enslaving as an active interface with an up link
[  516.502325] bond0: (slave eth0): Releasing backup interface
[  516.606444] bond0: (slave eth0): Enslaving as an active interface with an up link
[  520.789888] bond0: (slave eth0): Releasing backup interface
[  520.824813] bond0 (unregistering): Released all slaves