[ 1724.500568] br0: port 1(dummy0) entered blocking state
[ 1724.500597] br0: port 1(dummy0) entered disabled state
[ 1724.500635] dummy0: entered allmulticast mode
[ 1724.500674] dummy0: entered promiscuous mode
[ 1724.503281] br0: port 1(dummy0) entered blocking state
[ 1724.503338] br0: port 1(dummy0) entered forwarding state
[ 1724.679822] dummy0: left allmulticast mode
[ 1724.679851] dummy0: left promiscuous mode
[ 1724.679885] br0: port 1(dummy0) entered disabled state