[ 1899.056771] br0: port 1(dummy0) entered blocking state
[ 1899.056849] br0: port 1(dummy0) entered disabled state
[ 1899.056921] dummy0: entered allmulticast mode
[ 1899.057005] dummy0: entered promiscuous mode
[ 1899.060502] br0: port 1(dummy0) entered blocking state
[ 1899.060536] br0: port 1(dummy0) entered forwarding state
[ 1899.312783] dummy0: left allmulticast mode
[ 1899.312860] dummy0: left promiscuous mode
[ 1899.312960] br0: port 1(dummy0) entered disabled state