[ 1962.642298][T21138] br0: port 1(dummy0) entered blocking state
[ 1962.642488][T21138] br0: port 1(dummy0) entered disabled state
[ 1962.642658][T21138] dummy0: entered allmulticast mode
[ 1962.643521][T21138] dummy0: entered promiscuous mode
[ 1962.669539][T21139] br0: port 1(dummy0) entered blocking state
[ 1962.670249][T21139] br0: port 1(dummy0) entered forwarding state
[ 1964.640556][   T12] dummy0: left allmulticast mode
[ 1964.642941][   T12] dummy0: left promiscuous mode
[ 1964.643218][   T12] br0: port 1(dummy0) entered disabled state