[ 2018.850587][T29980] br0: port 1(dummy0) entered blocking state
[ 2018.850768][T29980] br0: port 1(dummy0) entered disabled state
[ 2018.850940][T29980] dummy0: entered allmulticast mode
[ 2018.851910][T29980] dummy0: entered promiscuous mode
[ 2018.881485][T29981] br0: port 1(dummy0) entered blocking state
[ 2018.881727][T29981] br0: port 1(dummy0) entered forwarding state
[ 2020.879872][   T12] dummy0: left allmulticast mode
[ 2020.880600][   T12] dummy0: left promiscuous mode
[ 2020.880835][   T12] br0: port 1(dummy0) entered disabled state