[  504.778807] bond0: (slave eth0): making interface the new active one
[  504.778875] bond0: (slave eth0): Enslaving as an active interface with an up link
[  508.947914] bond0: (slave eth0): Releasing backup interface
[  509.027768] bond0: (slave eth0): Enslaving as an active interface with an up link
[  513.176441] bond0: (slave eth0): Releasing backup interface
[  513.210538] bond0 (unregistering): Released all slaves