[ 1968.003361][ T1379] br0: port 1(dummy0) entered blocking state
[ 1968.003558][ T1379] br0: port 1(dummy0) entered disabled state
[ 1968.003726][ T1379] dummy0: entered allmulticast mode
[ 1968.004760][ T1379] dummy0: entered promiscuous mode
[ 1968.033491][ T1380] br0: port 1(dummy0) entered blocking state
[ 1968.033674][ T1380] br0: port 1(dummy0) entered forwarding state
[ 1969.912847][   T12] dummy0: left allmulticast mode
[ 1969.913054][   T12] dummy0: left promiscuous mode
[ 1969.913305][   T12] br0: port 1(dummy0) entered disabled state