[  515.577936] bond0: (slave eth0): making interface the new active one
[  515.578018] bond0: (slave eth0): Enslaving as an active interface with an up link
[  519.838544] bond0: (slave eth0): Releasing backup interface
[  519.936897] bond0: (slave eth0): Enslaving as an active interface with an up link
[  524.120073] bond0: (slave eth0): Releasing backup interface
[  524.142996] bond0 (unregistering): Released all slaves