[ 1748.949423] br0: port 1(dummy0) entered blocking state
[ 1748.949498] br0: port 1(dummy0) entered disabled state
[ 1748.949567] dummy0: entered allmulticast mode
[ 1748.949654] dummy0: entered promiscuous mode
[ 1748.952512] br0: port 1(dummy0) entered blocking state
[ 1748.952545] br0: port 1(dummy0) entered forwarding state
[ 1749.148963] dummy0: left allmulticast mode
[ 1749.148998] dummy0: left promiscuous mode
[ 1749.149024] br0: port 1(dummy0) entered disabled state