[  516.347623] bond0: (slave eth0): making interface the new active one
[  516.347704] bond0: (slave eth0): Enslaving as an active interface with an up link
[  520.521310] bond0: (slave eth0): Releasing backup interface
[  520.588546] bond0: (slave eth0): Enslaving as an active interface with an up link
[  524.750088] bond0: (slave eth0): Releasing backup interface
[  524.785033] bond0 (unregistering): Released all slaves