[  520.952000] bond0: (slave eth0): making interface the new active one
[  520.952089] bond0: (slave eth0): Enslaving as an active interface with an up link
[  525.133246] bond0: (slave eth0): Releasing backup interface
[  525.192763] bond0: (slave eth0): Enslaving as an active interface with an up link
[  529.367504] bond0: (slave eth0): Releasing backup interface