add note do delete br-int
diff --git a/xos/configurations/cord/README-VTN.md b/xos/configurations/cord/README-VTN.md
index adc6ac5..0764169 100644
--- a/xos/configurations/cord/README-VTN.md
+++ b/xos/configurations/cord/README-VTN.md
@@ -39,6 +39,7 @@
     emacs /usr/share/openvswitch/scripts/ovs-ctl
         update settings as per vtn docs to make port 6640 visible
     service openvswitch-switch restart
+    ovs-vsctl del-br br-int
 
 VTN doesn't seem to like cloudlab's networks (flat-net-1, ext-net, etc). You might have to delete them all.