[  515.627497] bond0: (slave eth0): making interface the new active one
[  515.627598] bond0: (slave eth0): Enslaving as an active interface with an up link
[  519.840787] bond0: (slave eth0): Releasing backup interface
[  519.955104] bond0: (slave eth0): Enslaving as an active interface with an up link
[  524.117005] bond0: (slave eth0): Releasing backup interface
[  524.153949] bond0 (unregistering): Released all slaves