[  521.549893] bond0: (slave eth0): making interface the new active one
[  521.549992] bond0: (slave eth0): Enslaving as an active interface with an up link
[  525.704339] bond0: (slave eth0): Releasing backup interface
[  525.772273] bond0: (slave eth0): Enslaving as an active interface with an up link
[  529.937407] bond0: (slave eth0): Releasing backup interface
[  529.968525] bond0 (unregistering): Released all slaves