Cannot obtain tunnel-related information

[Raman Budny]

I am trying to setup GRE tunnel with of-config. However, I cannot get information about tunnel setup in openvswitch:

# ovs-vsctl add-br my-br
# ovs-vsctl set Interface my-br type=gre
# ovs-vsctl set Interface my-br options="df_default="true", in_key=flow, local_ip="0", out_key=flow, remote_ip=flow"
# ovs-vsctl show
aebe82a0-6993-4786-a896-ad7e16cde7d7
    Bridge my-br
        Port my-br
            Interface my-br
                type: gre
                options: {df_default="true", in_key=flow, local_ip="0", out_key=flow, remote_ip=flow}
    Bridge ofc-bridge
        fail_mode: secure
        Port ofc-bridge
            Interface ofc-bridge
                type: internal

Get-config output:

<?xml version='1.0' encoding='UTF-8'?>
<ns0:capable-switch xmlns:ns0="urn:onf:config:yang">
      <ns0:id>openvswitch</ns0:id>
      <ns0:resources>
        <ns0:port>
          <ns0:name>my-br</ns0:name>
          <ns0:configuration>
            <ns0:admin-state>down</ns0:admin-state>
            <ns0:no-receive>false</ns0:no-receive>
            <ns0:no-forward>false</ns0:no-forward>
            <ns0:no-packet-in>false</ns0:no-packet-in>
          </ns0:configuration>
        </ns0:port>
        <ns0:port>
          <ns0:name>ofc-bridge</ns0:name>
          <ns0:requested-number>666</ns0:requested-number>
          <ns0:configuration>
            <ns0:admin-state>down</ns0:admin-state>
            <ns0:no-receive>false</ns0:no-receive>
            <ns0:no-forward>false</ns0:no-forward>
            <ns0:no-packet-in>false</ns0:no-packet-in>
          </ns0:configuration>
        </ns0:port>
      </ns0:resources>
      <ns0:logical-switches>
        <ns0:switch>
          <ns0:id>my-br</ns0:id>
          <ns0:datapath-id>00:00:1e:00:0b:6e:7c:4f</ns0:datapath-id>
          <ns0:resources>
            <ns0:port>my-br</ns0:port>
          </ns0:resources>
        </ns0:switch>
        <ns0:switch>
          <ns0:id>ofc-bridge</ns0:id>
          <ns0:datapath-id>00:01:02:03:04:05:06:07</ns0:datapath-id>
          <ns0:lost-connection-behavior>failSecureMode</ns0:lost-connection-behavior>
          <ns0:resources>
            <ns0:port>ofc-bridge</ns0:port>
          </ns0:resources>
        </ns0:switch>
      </ns0:logical-switches>
    </ns0:capable-switch>

I expect to get more information about my-br tunnel: type, local-endpoint-address, remote-endpoint-address, as mentioned in of-config 1.2 spec...

What I am doing wrong?

[Radek Krejčí]

The wrong (or just unrecommended) is your approach to create configuration data via ovs-vsctl() and then access them by of-config.

The problem is that of-config has 2 tunnel types (tunnel and ipgre-tunnel) that actually maps both to the gre type in OVSDB. Therefore, ofc-server adds an external-id into the OVSDB when it creates a tunnel. This id helps then to show the correct type according to the of-config data model.