[  503.005943] bond0: (slave eth0): making interface the new active one
[  503.006057] bond0: (slave eth0): Enslaving as an active interface with an up link
[  507.158653] bond0: (slave eth0): Releasing backup interface
[  507.240164] bond0: (slave eth0): Enslaving as an active interface with an up link
[  511.383723] bond0: (slave eth0): Releasing backup interface
[  511.415445] bond0 (unregistering): Released all slaves