[ 1221.348962] br0: port 1(dummy0) entered blocking state
[ 1221.349004] br0: port 1(dummy0) entered disabled state
[ 1221.349043] dummy0: entered allmulticast mode
[ 1221.349092] dummy0: entered promiscuous mode
[ 1221.351812] br0: port 1(dummy0) entered blocking state
[ 1221.351874] br0: port 1(dummy0) entered forwarding state
[ 1221.543239] dummy0: left allmulticast mode
[ 1221.543299] dummy0: left promiscuous mode
[ 1221.543360] br0: port 1(dummy0) entered disabled state