[ 1722.020350] br0: port 1(dummy0) entered blocking state
[ 1722.020384] br0: port 1(dummy0) entered disabled state
[ 1722.020423] dummy0: entered allmulticast mode
[ 1722.020466] dummy0: entered promiscuous mode
[ 1722.023840] br0: port 1(dummy0) entered blocking state
[ 1722.023873] br0: port 1(dummy0) entered forwarding state
[ 1722.263282] dummy0: left allmulticast mode
[ 1722.263313] dummy0: left promiscuous mode
[ 1722.263337] br0: port 1(dummy0) entered disabled state