Update README-VTN.md
diff --git a/xos/configurations/cord/README-VTN.md b/xos/configurations/cord/README-VTN.md
index da6e5c6..c923dbb 100644
--- a/xos/configurations/cord/README-VTN.md
+++ b/xos/configurations/cord/README-VTN.md
@@ -48,3 +48,6 @@
For development, I suggest using the bash configuration (remember to start the ONOS observer manually) so that
there aren't a bunch of preexisting Neutron networks and nova instances to get in the way.
+
+Problems:
+* If you have more than one compute node, then the node that isn't running ONOS VTN will report as incomplete in VTN. This is because the openvswitch is trying to contact VTN on 172.17.0.2:6653.