[  520.634831] bond0: (slave eth0): making interface the new active one
[  520.634918] bond0: (slave eth0): Enslaving as an active interface with an up link
[  524.811144] bond0: (slave eth0): Releasing backup interface
[  524.883520] bond0: (slave eth0): Enslaving as an active interface with an up link
[  529.044008] bond0: (slave eth0): Releasing backup interface