[  520.136880] bond0: (slave eth0): making interface the new active one
[  520.136966] bond0: (slave eth0): Enslaving as an active interface with an up link
[  524.380437] bond0: (slave eth0): Releasing backup interface
[  524.486117] bond0: (slave eth0): Enslaving as an active interface with an up link
[  528.662068] bond0: (slave eth0): Releasing backup interface
[  528.694094] bond0 (unregistering): Released all slaves