[ 1747.336488] br0: port 1(dummy0) entered blocking state
[ 1747.336523] br0: port 1(dummy0) entered disabled state
[ 1747.336566] dummy0: entered allmulticast mode
[ 1747.336617] dummy0: entered promiscuous mode
[ 1747.339417] br0: port 1(dummy0) entered blocking state
[ 1747.339447] br0: port 1(dummy0) entered forwarding state
[ 1747.522028] dummy0: left allmulticast mode
[ 1747.522060] dummy0: left promiscuous mode
[ 1747.522143] br0: port 1(dummy0) entered disabled state