[  501.681683] bond0: (slave eth0): making interface the new active one
[  501.681785] bond0: (slave eth0): Enslaving as an active interface with an up link
[  505.876136] bond0: (slave eth0): Releasing backup interface
[  505.955935] bond0: (slave eth0): Enslaving as an active interface with an up link
[  510.102419] bond0: (slave eth0): Releasing backup interface