[  505.439971] bond0: (slave eth0): making interface the new active one
[  505.440046] bond0: (slave eth0): Enslaving as an active interface with an up link
[  509.653114] bond0: (slave eth0): Releasing backup interface
[  509.735180] bond0: (slave eth0): Enslaving as an active interface with an up link
[  513.881993] bond0: (slave eth0): Releasing backup interface