ovs 网桥 和 网卡必须是一对一的关系

    Bridge br-vlan
        Port patch-localnet.underlay-to-br-int
            Interface patch-localnet.underlay-to-br-int
                type: patch
                options: {peer=patch-br-int-to-localnet.underlay}
        Port vlan
            Interface vlan
        Port br-vlan
            Interface br-vlan
                type: internal
    Bridge br-external204
        Port br-external204
            Interface br-external204
                type: internal

否则会出现网络不通的情况