[  506.861862] bond0: (slave eth0): making interface the new active one
[  506.861948] bond0: (slave eth0): Enslaving as an active interface with an up link
[  511.063284] bond0: (slave eth0): Releasing backup interface
[  511.132910] bond0: (slave eth0): Enslaving as an active interface with an up link
[  515.295342] bond0: (slave eth0): Releasing backup interface
[  515.337246] bond0 (unregistering): Released all slaves