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This looks like an issue I was seeing as well and was helped by someone in
the IRC channel.

Try this:

`watch -n0.2 ovs-vsctl show`

If you see you br-tun appearing and disappearing rapidly remove
/etc/sysconfig/network-scripts/ifcfg-br-tun on all network and compute
hosts and restart networking (I think I just rebooted). That fixed the
problem for me.


On Sun, Aug 10, 2014 at 10:28 PM, ttjiang <jt628910 at 163.com> wrote:

>   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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