diff --git a/xos/cord/models.py b/xos/cord/models.py
index 37b9bd9..5c5d972 100644
--- a/xos/cord/models.py
+++ b/xos/cord/models.py
@@ -607,7 +607,8 @@
 
     KIND = "vBNG"
 
-    default_attributes = {"routeable_subnet": ""}
+    default_attributes = {"routeable_subnet": "",
+                          "mapped_ip": ""}
 
     @property
     def routeable_subnet(self):
@@ -616,3 +617,11 @@
     @routeable_subnet.setter
     def routeable_subnet(self, value):
         self.set_attribute("routeable_subnet", value)
+
+    @property
+    def mapped_ip(self):
+        return self.get_attribute("mapped_ip", self.default_attributes["mapped_ip"])
+
+    @mapped_ip.setter
+    def mapped_ip(self, value):
+        self.set_attribute("mapped_ip", value)
diff --git a/xos/observers/vbng/steps/sync_vbngtenant.py b/xos/observers/vbng/steps/sync_vbngtenant.py
index dfcbabb..b0dd345 100644
--- a/xos/observers/vbng/steps/sync_vbngtenant.py
+++ b/xos/observers/vbng/steps/sync_vbngtenant.py
@@ -37,11 +37,10 @@
         return objs
 
     def defer_sync(self, o, reason):
+        logger.info("defer object %s due to %s" % (str(o), reason))
         raise Exception("defer object %s due to %s" % (str(o), reason))
 
-    def sync_record(self, o):
-        logger.info("sync'ing VBNGTenant %s" % str(o))
-
+    def get_private_ip(self, o):
         vcpes = VCPETenant.get_tenant_objects().all()
         vcpes = [x for x in vcpes if (x.vbng is not None) and (x.vbng.id == o.id)]
         if not vcpes:
@@ -64,17 +63,31 @@
             self.defer_sync(o, "WAN network is not filled in yet")
             return
 
-        private_ip = external_ns.ip
+        return external_ns.ip
+
+    def sync_record(self, o):
+        logger.info("sync'ing VBNGTenant %s" % str(o))
 
         if not o.routeable_subnet:
+            private_ip = self.get_private_ip(o)
+            logger.info("contacting vBNG service to request mapping for private ip %s" % private_ip)
+
             r = requests.post(VBNG_API + "%s" % private_ip, )
             if (r.status_code != 200):
                 raise Exception("Received error from bng service (%d)" % r.status_code)
             logger.info("received public IP %s from private IP %s" % (r.text, private_ip))
             o.routeable_subnet = r.text
+            o.mapped_ip = private_ip
 
         o.save()
 
-    def delete_record(self, m):
-        pass
+    def delete_record(self, o):
+        logger.info("deleting VBNGTenant %s" % str(o))
+
+        if o.mapped_ip:
+            private_ip = o.mapped_ip
+            logger.info("contacting vBNG service to delete private ip %s" % private_ip)
+            r = requests.delete(VBNG_API + "%s" % private_ip, )
+            if (r.status_code != 200):
+                raise Exception("Received error from bng service (%d)" % r.status_code)
 
diff --git a/xos/observers/vcpe/steps/sync_vcpetenant.py b/xos/observers/vcpe/steps/sync_vcpetenant.py
index 8d85601..fcfc982 100644
--- a/xos/observers/vcpe/steps/sync_vcpetenant.py
+++ b/xos/observers/vcpe/steps/sync_vcpetenant.py
@@ -30,6 +30,7 @@
         SyncStep.__init__(self, **args)
 
     def defer_sync(self, o, reason):
+        logger.info("defer object %s due to %s" % (str(o), reason))
         raise Exception("defer object %s due to %s" % (str(o), reason))
 
     def fetch_pending(self, deleted):