[  540.649605] bond0: (slave eth0): making interface the new active one
[  540.649726] bond0: (slave eth0): Enslaving as an active interface with an up link
[  544.804087] bond0: (slave eth0): Releasing backup interface
[  544.882899] bond0: (slave eth0): Enslaving as an active interface with an up link
[  549.023615] bond0: (slave eth0): Releasing backup interface
[  549.056667] bond0 (unregistering): Released all slaves