[  514.474204] bond0: (slave eth0): making interface the new active one
[  514.474288] bond0: (slave eth0): Enslaving as an active interface with an up link
[  518.677748] bond0: (slave eth0): Releasing backup interface
[  518.781952] bond0: (slave eth0): Enslaving as an active interface with an up link
[  522.957880] bond0: (slave eth0): Releasing backup interface
[  522.989719] bond0 (unregistering): Released all slaves