[  502.693038] bond0: (slave eth0): making interface the new active one
[  502.693164] bond0: (slave eth0): Enslaving as an active interface with an up link
[  506.887339] bond0: (slave eth0): Releasing backup interface
[  506.966078] bond0: (slave eth0): Enslaving as an active interface with an up link
[  511.108279] bond0: (slave eth0): Releasing backup interface
[  511.140178] bond0 (unregistering): Released all slaves