[  511.245743] bond0: (slave eth0): making interface the new active one
[  511.245838] bond0: (slave eth0): Enslaving as an active interface with an up link
[  515.479600] bond0: (slave eth0): Releasing backup interface
[  515.588358] bond0: (slave eth0): Enslaving as an active interface with an up link
[  519.771014] bond0: (slave eth0): Releasing backup interface
[  519.807830] bond0 (unregistering): Released all slaves