[  519.820241] bond0: (slave eth0): making interface the new active one
[  519.820316] bond0: (slave eth0): Enslaving as an active interface with an up link
[  524.066239] bond0: (slave eth0): Releasing backup interface
[  524.173345] bond0: (slave eth0): Enslaving as an active interface with an up link
[  528.355249] bond0: (slave eth0): Releasing backup interface
[  528.386146] bond0 (unregistering): Released all slaves