[ 2015.712727][T24309] br0: port 1(dummy0) entered blocking state
[ 2015.712913][T24309] br0: port 1(dummy0) entered disabled state
[ 2015.713096][T24309] dummy0: entered allmulticast mode
[ 2015.714050][T24309] dummy0: entered promiscuous mode
[ 2015.742610][T24310] br0: port 1(dummy0) entered blocking state
[ 2015.742851][T24310] br0: port 1(dummy0) entered forwarding state
[ 2017.733659][   T12] dummy0: left allmulticast mode
[ 2017.734530][   T12] dummy0: left promiscuous mode
[ 2017.734758][   T12] br0: port 1(dummy0) entered disabled state