diff --git a/xos/core/xoslib/methods/cordsubscriber.py b/xos/core/xoslib/methods/cordsubscriber.py
index a6e189b..e504c71 100644
--- a/xos/core/xoslib/methods/cordsubscriber.py
+++ b/xos/core/xoslib/methods/cordsubscriber.py
@@ -403,6 +403,7 @@
         patterns.append( url("^rs/cord_debug/vbng_dump/$", self.as_view({"get": "get_vbng_dump"}), name="vbng_dump"))
         return patterns
 
+    # contact vBNG service and dump current list of mappings
     def get_vbng_dump(self, request, pk=None):
         result=subprocess.check_output(["curl", "http://10.0.3.136:8181/onos/virtualbng/privateip/map"])
         if request.GET.get("theformat",None)=="text":