[  519.715361] bond0: (slave eth0): making interface the new active one
[  519.715436] bond0: (slave eth0): Enslaving as an active interface with an up link
[  523.911909] bond0: (slave eth0): Releasing backup interface
[  523.968702] bond0: (slave eth0): Enslaving as an active interface with an up link
[  528.136870] bond0: (slave eth0): Releasing backup interface
[  528.164824] bond0 (unregistering): Released all slaves