[  504.106723] bond0: (slave eth0): making interface the new active one
[  504.106828] bond0: (slave eth0): Enslaving as an active interface with an up link
[  508.299848] bond0: (slave eth0): Releasing backup interface
[  508.382006] bond0: (slave eth0): Enslaving as an active interface with an up link
[  512.523446] bond0: (slave eth0): Releasing backup interface