[  501.626736] bond0: (slave eth0): making interface the new active one
[  501.626824] bond0: (slave eth0): Enslaving as an active interface with an up link
[  505.809019] bond0: (slave eth0): Releasing backup interface
[  505.878658] bond0: (slave eth0): Enslaving as an active interface with an up link
[  510.048442] bond0: (slave eth0): Releasing backup interface