[ 2017.022023][T13867] br0: port 1(dummy0) entered blocking state
[ 2017.022208][T13867] br0: port 1(dummy0) entered disabled state
[ 2017.022388][T13867] dummy0: entered allmulticast mode
[ 2017.023375][T13867] dummy0: entered promiscuous mode
[ 2017.054236][T13868] br0: port 1(dummy0) entered blocking state
[ 2017.054865][T13868] br0: port 1(dummy0) entered forwarding state
[ 2019.040509][   T12] dummy0: left allmulticast mode
[ 2019.041626][   T12] dummy0: left promiscuous mode
[ 2019.041864][   T12] br0: port 1(dummy0) entered disabled state