题目：添加一条流表项，设置流表项生命周期为1000s，优先级为17，入端口为3，动作是output:2，写法正确的是( )
A、
ovs-vsctl add-flow br0 idle_timeout=1000,priority=17,in_port=3,actions=output:2
B、
ovs-ofctl add-flow br0 idle_timeout=1000,priority=17,in_port=3,actions=output:2
C、ovs-vsctl add-flow br0 idle_timeout=1000,priority=17,port=3,actions=output:2
D、ovs-ofctl add-flow br0 idle_timeout=1000,priority=17,port=3,actions=output:2
