[ 1921.749019][T22906] br0: port 1(dummy0) entered blocking state
[ 1921.749217][T22906] br0: port 1(dummy0) entered disabled state
[ 1921.749383][T22906] dummy0: entered allmulticast mode
[ 1921.750343][T22906] dummy0: entered promiscuous mode
[ 1921.775003][T22907] br0: port 1(dummy0) entered blocking state
[ 1921.775474][T22907] br0: port 1(dummy0) entered forwarding state
[ 1923.652519][   T12] dummy0: left allmulticast mode
[ 1923.653575][   T12] dummy0: left promiscuous mode
[ 1923.653802][   T12] br0: port 1(dummy0) entered disabled state