notes for VTN
diff --git a/xos/configurations/cord/README-VTN.md b/xos/configurations/cord/README-VTN.md
new file mode 100644
index 0000000..bb0c6f7
--- /dev/null
+++ b/xos/configurations/cord/README-VTN.md
@@ -0,0 +1,35 @@
+vtn notes:
+
+inside the xos container:
+ python /opt/xos/tosca/run.py padmin@vicci.org /opt/xos/tosca/samples/vtn.yaml
+
+ctl node:
+ # set ONOS_VTN_HOSTNAME to the host where the VTN container was installed
+ ONOS_VTN_HOSTNAME="cp-2.smbaker-xos5.xos-pg0.clemson.cloudlab.us"
+ apt-get install python-pip
+ pip install -U setuptools pip
+ git clone https://github.com/openstack/networking-onos.git
+ cd networking-onos
+ sudo python setup.py install
+ cat > /usr/local/etc/neutron/plugins/ml2/conf_onos.ini <<EOF
+ [ml2_onos]
+ url_path = http://$ONOS_VTN_HOSTNAME:8181/onos/vtn
+ username = karaf
+ password = karaf
+ EOF
+ emacs /etc/neutron/plugins/ml2/ml2_conf.ini
+ update settings as per vtn docs ([ml2] and [ml2_type_vxlan] sections)
+ systemctl restart neutron-server
+
+Compute node that has the ONOS Container
+ # we need NAT rule so the neutron vtn plugin can talk to onos
+ # change 172.17.0.2 to the IP address for the ONOS container (use "docker inspect")
+ iptables -t nat -A PREROUTING -i br-ex -p tcp --dport 8101 -j DNAT --to-destination 172.17.0.2
+
+Compute nodes (all of them):
+ systemctl stop neutron-plugin-openvswitch-agent
+ /usr/share/openvswitch/scripts/ovs-ctl
+ update settings as per vtn docs to make port 6640 visible
+ service openvswitch-switch restart
+
+VTN doesn't seem to like cloudlab's networks (flat-net-1, ext-net, etc). You might have to delete them all.