[  505.740711] bond0: (slave eth0): making interface the new active one
[  505.740813] bond0: (slave eth0): Enslaving as an active interface with an up link
[  509.908277] bond0: (slave eth0): Releasing backup interface
[  509.976796] bond0: (slave eth0): Enslaving as an active interface with an up link
[  514.134556] bond0: (slave eth0): Releasing backup interface
[  514.162398] bond0 (unregistering): Released all slaves