[  521.078440] bond0: (slave eth0): making interface the new active one
[  521.078517] bond0: (slave eth0): Enslaving as an active interface with an up link
[  525.262459] bond0: (slave eth0): Releasing backup interface
[  525.338790] bond0: (slave eth0): Enslaving as an active interface with an up link
[  529.490674] bond0: (slave eth0): Releasing backup interface
[  529.514605] bond0 (unregistering): Released all slaves