[ 1648.438649] br0: port 1(dummy0) entered blocking state
[ 1648.438738] br0: port 1(dummy0) entered disabled state
[ 1648.438808] dummy0: entered allmulticast mode
[ 1648.438891] dummy0: entered promiscuous mode
[ 1648.441660] br0: port 1(dummy0) entered blocking state
[ 1648.441696] br0: port 1(dummy0) entered forwarding state
[ 1648.636324] dummy0: left allmulticast mode
[ 1648.636403] dummy0: left promiscuous mode
[ 1648.636466] br0: port 1(dummy0) entered disabled state