[  502.876168] bond0: (slave eth0): making interface the new active one
[  502.876239] bond0: (slave eth0): Enslaving as an active interface with an up link
[  507.027396] bond0: (slave eth0): Releasing backup interface
[  507.105575] bond0: (slave eth0): Enslaving as an active interface with an up link
[  511.255697] bond0: (slave eth0): Releasing backup interface