diff --git a/src/main/java/org.onosproject.xran/rest/CellWebResource.java b/src/main/java/org.onosproject.xran/rest/CellWebResource.java
index ac2806d..d792fa6 100644
--- a/src/main/java/org.onosproject.xran/rest/CellWebResource.java
+++ b/src/main/java/org.onosproject.xran/rest/CellWebResource.java
@@ -138,6 +138,14 @@
                         );
                     }
                 }
+
+                return ResponseHelper.getResponse(
+                        mapper(),
+                        ResponseHelper.statusCode.NOT_IMPLEMENTED,
+                        "Not Implemented",
+                        "The command you specified is not implemented or doesn't exist. We support " +
+                                "RRMConf commands."
+                );
             } catch (Exception e) {
                 String fullStackTrace = ExceptionUtils.getFullStackTrace(e);
                 log.error(fullStackTrace);
diff --git a/src/main/java/org.onosproject.xran/rest/LinkWebResource.java b/src/main/java/org.onosproject.xran/rest/LinkWebResource.java
index 4d8dc11..4deb543 100644
--- a/src/main/java/org.onosproject.xran/rest/LinkWebResource.java
+++ b/src/main/java/org.onosproject.xran/rest/LinkWebResource.java
@@ -150,6 +150,14 @@
                     return handleRRMChange(link, rrmConf);
                 }
 
+                return ResponseHelper.getResponse(
+                        mapper(),
+                        ResponseHelper.statusCode.NOT_IMPLEMENTED,
+                        "Not Implemented",
+                        "The command you specified is not implemented or doesn't exist. We support " +
+                                "type/RRMConf/traficpercent commands."
+                );
+
             } catch (Exception e) {
                 String fullStackTrace = ExceptionUtils.getFullStackTrace(e);
                 log.error(fullStackTrace);
@@ -254,7 +262,8 @@
                 mapper(),
                 ResponseHelper.statusCode.NOT_IMPLEMENTED,
                 "Not Implemented",
-                "This request is not implemented"
+                "The command you specified is not implemented or doesn't exist. We support " +
+                        "type/RRMConf/traficpercent commands."
         );
     }