[Openstack] use rdo install neutron ml2+vxlan

[ttjiang]

hi all:
I just use rdo to install neutron, I have some questions

After I finished.
I run this command，I can not see br-tun
ovs-vsctl show
876d6e88-b3fc-4709-8e29-5e61fbbd1001
    Bridge br-ex
        Port br-ex
            Interface br-ex
                type: internal
    Bridge br-int
        Port patch-tun
            Interface patch-tun
                type: patch
                options: {peer=patch-int}
        Port br-int
            Interface br-int
                type: internal
    ovs_version: "1.11.0"
but I then run this command again，br-tun appear now，what happen about this
ovs-vsctl show
876d6e88-b3fc-4709-8e29-5e61fbbd1001
    Bridge br-tun
        Port br-tun
            Interface br-tun
                type: internal
    Bridge br-ex
        Port br-ex
            Interface br-ex
                type: internal
    Bridge br-int
        Port patch-tun
            Interface patch-tun
                type: patch
                options: {peer=patch-int}
        Port br-int
            Interface br-int
                type: internal
    ovs_version: "1.11.0"

I run this command，just see LOCAL(br-tun):，is that normal ？I think the br-tun 
must have the port to br-int？
ovs-ofctl show br-tun
OFPT_FEATURES_REPLY (xid=0x2): dpid:0000a298acde9a47
n_tables:254, n_buffers:256
capabilities: FLOW_STATS TABLE_STATS PORT_STATS QUEUE_STATS ARP_MATCH_IP
actions: OUTPUT SET_VLAN_VID SET_VLAN_PCP STRIP_VLAN SET_DL_SRC SET_DL_DST 
SET_NW_SRC SET_NW_DST SET_NW_TOS SET_TP_SRC SET_TP_DST ENQUEUE
LOCAL(br-tun): addr:a2:98:ac:de:9a:47
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
OFPT_GET_CONFIG_REPLY (xid=0x4): frags=normal miss_send_len=0



any people can give me some help，thanks




ttjiang
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