[  513.345228] bond0: (slave eth0): making interface the new active one
[  513.345298] bond0: (slave eth0): Enslaving as an active interface with an up link
[  517.593045] bond0: (slave eth0): Releasing backup interface
[  517.704351] bond0: (slave eth0): Enslaving as an active interface with an up link
[  521.883480] bond0: (slave eth0): Releasing backup interface