[  520.620097] bond0: (slave eth0): making interface the new active one
[  520.620179] bond0: (slave eth0): Enslaving as an active interface with an up link
[  524.828458] bond0: (slave eth0): Releasing backup interface
[  524.938475] bond0: (slave eth0): Enslaving as an active interface with an up link
[  529.115015] bond0: (slave eth0): Releasing backup interface
[  529.139940] bond0 (unregistering): Released all slaves