[  504.125127] bond0: (slave eth0): making interface the new active one
[  504.125206] bond0: (slave eth0): Enslaving as an active interface with an up link
[  508.306043] bond0: (slave eth0): Releasing backup interface
[  508.394901] bond0: (slave eth0): Enslaving as an active interface with an up link
[  512.601286] bond0: (slave eth0): Releasing backup interface
[  512.631204] bond0 (unregistering): Released all slaves