[ 2018.927000][T26556] br0: port 1(dummy0) entered blocking state
[ 2018.927229][T26556] br0: port 1(dummy0) entered disabled state
[ 2018.927435][T26556] dummy0: entered allmulticast mode
[ 2018.928478][T26556] dummy0: entered promiscuous mode
[ 2018.957508][T26557] br0: port 1(dummy0) entered blocking state
[ 2018.957918][T26557] br0: port 1(dummy0) entered forwarding state
[ 2020.991795][   T12] dummy0: left allmulticast mode
[ 2020.992887][   T12] dummy0: left promiscuous mode
[ 2020.993263][   T12] br0: port 1(dummy0) entered disabled state