[  502.657269] bond0: (slave eth0): making interface the new active one
[  502.657377] bond0: (slave eth0): Enslaving as an active interface with an up link
[  506.833621] bond0: (slave eth0): Releasing backup interface
[  506.902543] bond0: (slave eth0): Enslaving as an active interface with an up link
[  511.060498] bond0: (slave eth0): Releasing backup interface
[  511.086439] bond0 (unregistering): Released all slaves