[  502.664869] bond0: (slave eth0): making interface the new active one
[  502.664946] bond0: (slave eth0): Enslaving as an active interface with an up link
[  506.824923] bond0: (slave eth0): Releasing backup interface
[  506.895671] bond0: (slave eth0): Enslaving as an active interface with an up link
[  511.058317] bond0: (slave eth0): Releasing backup interface