[ 1621.700529] br0: port 1(dummy0) entered blocking state
[ 1621.700596] br0: port 1(dummy0) entered disabled state
[ 1621.700678] dummy0: entered allmulticast mode
[ 1621.700758] dummy0: entered promiscuous mode
[ 1621.703477] br0: port 1(dummy0) entered blocking state
[ 1621.703509] br0: port 1(dummy0) entered forwarding state
[ 1621.881279] dummy0: left allmulticast mode
[ 1621.881310] dummy0: left promiscuous mode
[ 1621.881333] br0: port 1(dummy0) entered disabled state