[ 1622.974552] br0: port 1(dummy0) entered blocking state
[ 1622.974582] br0: port 1(dummy0) entered disabled state
[ 1622.974604] dummy0: entered allmulticast mode
[ 1622.974642] dummy0: entered promiscuous mode
[ 1622.977444] br0: port 1(dummy0) entered blocking state
[ 1622.977493] br0: port 1(dummy0) entered forwarding state
[ 1623.170338] dummy0: left allmulticast mode
[ 1623.170364] dummy0: left promiscuous mode
[ 1623.170388] br0: port 1(dummy0) entered disabled state