[  514.987165] bond0: (slave eth0): making interface the new active one
[  514.987285] bond0: (slave eth0): Enslaving as an active interface with an up link
[  519.187512] bond0: (slave eth0): Releasing backup interface
[  519.268265] bond0: (slave eth0): Enslaving as an active interface with an up link
[  523.419168] bond0: (slave eth0): Releasing backup interface