[ 1943.511397][ T4721] br0: port 1(dummy0) entered blocking state
[ 1943.511584][ T4721] br0: port 1(dummy0) entered disabled state
[ 1943.511762][ T4721] dummy0: entered allmulticast mode
[ 1943.512643][ T4721] dummy0: entered promiscuous mode
[ 1943.545849][ T4722] br0: port 1(dummy0) entered blocking state
[ 1943.546205][ T4722] br0: port 1(dummy0) entered forwarding state
[ 1945.562479][   T12] dummy0: left allmulticast mode
[ 1945.563489][   T12] dummy0: left promiscuous mode
[ 1945.563727][   T12] br0: port 1(dummy0) entered disabled state