[  512.590553] bond0: (slave eth0): making interface the new active one
[  512.590638] bond0: (slave eth0): Enslaving as an active interface with an up link
[  516.828364] bond0: (slave eth0): Releasing backup interface
[  516.933513] bond0: (slave eth0): Enslaving as an active interface with an up link
[  521.113071] bond0: (slave eth0): Releasing backup interface
[  521.140002] bond0 (unregistering): Released all slaves