[  520.353822] bond0: (slave eth0): making interface the new active one
[  520.353940] bond0: (slave eth0): Enslaving as an active interface with an up link
[  524.503446] bond0: (slave eth0): Releasing backup interface
[  524.575630] bond0: (slave eth0): Enslaving as an active interface with an up link
[  528.733076] bond0: (slave eth0): Releasing backup interface