[  520.380552] bond0: (slave eth0): making interface the new active one
[  520.380635] bond0: (slave eth0): Enslaving as an active interface with an up link
[  524.565415] bond0: (slave eth0): Releasing backup interface
[  524.654848] bond0: (slave eth0): Enslaving as an active interface with an up link
[  528.862488] bond0: (slave eth0): Releasing backup interface