[  501.864418] bond0: (slave eth0): making interface the new active one
[  501.864543] bond0: (slave eth0): Enslaving as an active interface with an up link
[  506.069191] bond0: (slave eth0): Releasing backup interface
[  506.142556] bond0: (slave eth0): Enslaving as an active interface with an up link
[  510.290502] bond0: (slave eth0): Releasing backup interface
[  510.323450] bond0 (unregistering): Released all slaves