[  519.321274] bond0: (slave eth0): making interface the new active one
[  519.321360] bond0: (slave eth0): Enslaving as an active interface with an up link
[  523.544639] bond0: (slave eth0): Releasing backup interface
[  523.625131] bond0: (slave eth0): Enslaving as an active interface with an up link
[  527.773578] bond0: (slave eth0): Releasing backup interface
[  527.805277] bond0 (unregistering): Released all slaves