[  514.948272] bond0: (slave eth0): making interface the new active one
[  514.948366] bond0: (slave eth0): Enslaving as an active interface with an up link
[  519.192431] bond0: (slave eth0): Releasing backup interface
[  519.308186] bond0: (slave eth0): Enslaving as an active interface with an up link
[  523.480947] bond0: (slave eth0): Releasing backup interface
[  523.519895] bond0 (unregistering): Released all slaves