[ 1683.989993] br0: port 1(dummy0) entered blocking state
[ 1683.990035] br0: port 1(dummy0) entered disabled state
[ 1683.990070] dummy0: entered allmulticast mode
[ 1683.990127] dummy0: entered promiscuous mode
[ 1683.993534] br0: port 1(dummy0) entered blocking state
[ 1683.993600] br0: port 1(dummy0) entered forwarding state
[ 1684.214317] dummy0: left allmulticast mode
[ 1684.214352] dummy0: left promiscuous mode
[ 1684.214384] br0: port 1(dummy0) entered disabled state