[  504.752413] bond0: (slave eth0): making interface the new active one
[  504.752528] bond0: (slave eth0): Enslaving as an active interface with an up link
[  508.918240] bond0: (slave eth0): Releasing backup interface
[  508.999607] bond0: (slave eth0): Enslaving as an active interface with an up link
[  513.142566] bond0: (slave eth0): Releasing backup interface
[  513.181445] bond0 (unregistering): Released all slaves