diff --git a/Tethering/src/com/android/networkstack/tethering/Tethering.java b/Tethering/src/com/android/networkstack/tethering/Tethering.java
index af017f3..f613b73 100644
--- a/Tethering/src/com/android/networkstack/tethering/Tethering.java
+++ b/Tethering/src/com/android/networkstack/tethering/Tethering.java
@@ -1406,7 +1406,9 @@
     private void enableIpServing(int tetheringType, String ifname, int ipServingMode,
             boolean isNcm) {
         ensureIpServerStarted(ifname, tetheringType, isNcm);
-        changeInterfaceState(ifname, ipServingMode);
+        if (tether(ifname, ipServingMode) != TETHER_ERROR_NO_ERROR) {
+            Log.e(TAG, "unable start tethering on iface " + ifname);
+        }
     }
 
     private void disableWifiIpServingCommon(int tetheringType, String ifname) {
@@ -1551,27 +1553,6 @@
         }
     }
 
-    private void changeInterfaceState(String ifname, int requestedState) {
-        final int result;
-        switch (requestedState) {
-            case IpServer.STATE_UNAVAILABLE:
-            case IpServer.STATE_AVAILABLE:
-                result = untether(ifname);
-                break;
-            case IpServer.STATE_TETHERED:
-            case IpServer.STATE_LOCAL_ONLY:
-                result = tether(ifname, requestedState);
-                break;
-            default:
-                Log.wtf(TAG, "Unknown interface state: " + requestedState);
-                return;
-        }
-        if (result != TETHER_ERROR_NO_ERROR) {
-            Log.e(TAG, "unable start or stop tethering on iface " + ifname);
-            return;
-        }
-    }
-
     TetheringConfiguration getTetheringConfiguration() {
         return mConfig;
     }