[ 1800.903788] br0: port 1(dummy0) entered blocking state
[ 1800.903827] br0: port 1(dummy0) entered disabled state
[ 1800.903865] dummy0: entered allmulticast mode
[ 1800.903924] dummy0: entered promiscuous mode
[ 1800.907341] br0: port 1(dummy0) entered blocking state
[ 1800.907370] br0: port 1(dummy0) entered forwarding state
[ 1801.170307] dummy0: left allmulticast mode
[ 1801.170344] dummy0: left promiscuous mode
[ 1801.170402] br0: port 1(dummy0) entered disabled state