[  516.219611] bond0: (slave eth0): making interface the new active one
[  516.219716] bond0: (slave eth0): Enslaving as an active interface with an up link
[  520.472332] bond0: (slave eth0): Releasing backup interface
[  520.587853] bond0: (slave eth0): Enslaving as an active interface with an up link
[  524.765968] bond0: (slave eth0): Releasing backup interface
[  524.791865] bond0 (unregistering): Released all slaves