[ 1688.583009] br0: port 1(dummy0) entered blocking state
[ 1688.583060] br0: port 1(dummy0) entered disabled state
[ 1688.583104] dummy0: entered allmulticast mode
[ 1688.583156] dummy0: entered promiscuous mode
[ 1688.585713] br0: port 1(dummy0) entered blocking state
[ 1688.585748] br0: port 1(dummy0) entered forwarding state
[ 1688.768539] dummy0: left allmulticast mode
[ 1688.768584] dummy0: left promiscuous mode
[ 1688.768611] br0: port 1(dummy0) entered disabled state