[  521.507748] bond0: (slave eth0): making interface the new active one
[  521.507836] bond0: (slave eth0): Enslaving as an active interface with an up link
[  525.713308] bond0: (slave eth0): Releasing backup interface
[  525.801649] bond0: (slave eth0): Enslaving as an active interface with an up link
[  530.007043] bond0: (slave eth0): Releasing backup interface
[  530.040026] bond0 (unregistering): Released all slaves