[  512.371903] bond0: (slave eth0): making interface the new active one
[  512.371972] bond0: (slave eth0): Enslaving as an active interface with an up link
[  516.572434] bond0: (slave eth0): Releasing backup interface
[  516.690497] bond0: (slave eth0): Enslaving as an active interface with an up link
[  520.860341] bond0: (slave eth0): Releasing backup interface
[  520.898082] bond0 (unregistering): Released all slaves