[  513.624439] bond0: (slave eth0): making interface the new active one
[  513.624507] bond0: (slave eth0): Enslaving as an active interface with an up link
[  517.849098] bond0: (slave eth0): Releasing backup interface
[  517.942306] bond0: (slave eth0): Enslaving as an active interface with an up link
[  522.135215] bond0: (slave eth0): Releasing backup interface
[  522.162150] bond0 (unregistering): Released all slaves