[ 1753.720812] br0: port 1(dummy0) entered blocking state
[ 1753.720852] br0: port 1(dummy0) entered disabled state
[ 1753.720887] dummy0: entered allmulticast mode
[ 1753.720946] dummy0: entered promiscuous mode
[ 1753.723906] br0: port 1(dummy0) entered blocking state
[ 1753.723968] br0: port 1(dummy0) entered forwarding state
[ 1753.911634] dummy0: left allmulticast mode
[ 1753.911702] dummy0: left promiscuous mode
[ 1753.911766] br0: port 1(dummy0) entered disabled state