diff --git a/service-t/src/com/android/server/ethernet/EthernetNetworkFactory.java b/service-t/src/com/android/server/ethernet/EthernetNetworkFactory.java
index 2823391633..f266386024 100644
--- a/service-t/src/com/android/server/ethernet/EthernetNetworkFactory.java
+++ b/service-t/src/com/android/server/ethernet/EthernetNetworkFactory.java
@@ -177,12 +177,16 @@ public class EthernetNetworkFactory extends NetworkFactory {
             return;
         }
 
+        final NetworkCapabilities nc = new NetworkCapabilities.Builder(capabilities)
+                .setNetworkSpecifier(new EthernetNetworkSpecifier(ifaceName))
+                .build();
+
         if (DBG) {
-            Log.d(TAG, "addInterface, iface: " + ifaceName + ", capabilities: " + capabilities);
+            Log.d(TAG, "addInterface, iface: " + ifaceName + ", capabilities: " + nc);
         }
 
         final NetworkInterfaceState iface = new NetworkInterfaceState(
-                ifaceName, hwAddress, mHandler, mContext, ipConfig, capabilities, this, mDeps);
+                ifaceName, hwAddress, mHandler, mContext, ipConfig, nc, this, mDeps);
         mTrackingInterfaces.put(ifaceName, iface);
         updateCapabilityFilter();
     }
diff --git a/tests/ethernet/java/com/android/server/ethernet/EthernetNetworkFactoryTest.java b/tests/ethernet/java/com/android/server/ethernet/EthernetNetworkFactoryTest.java
index e10497e4e3..6cb13efecf 100644
--- a/tests/ethernet/java/com/android/server/ethernet/EthernetNetworkFactoryTest.java
+++ b/tests/ethernet/java/com/android/server/ethernet/EthernetNetworkFactoryTest.java
@@ -71,6 +71,7 @@ import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 
@@ -265,8 +266,12 @@ public class EthernetNetworkFactoryTest {
         triggerOnProvisioningSuccess();
         // provisioning succeeded, verify that the network agent is created, registered, marked
         // as connected and legacy type are correctly set.
-        verify(mDeps).makeEthernetNetworkAgent(any(), any(), any(), any(),
+        final ArgumentCaptor<NetworkCapabilities> ncCaptor = ArgumentCaptor.forClass(
+                NetworkCapabilities.class);
+        verify(mDeps).makeEthernetNetworkAgent(any(), any(), ncCaptor.capture(), any(),
                 argThat(x -> x.getLegacyType() == expectedLegacyType), any(), any());
+        assertEquals(
+                new EthernetNetworkSpecifier(iface), ncCaptor.getValue().getNetworkSpecifier());
         verifyNetworkAgentRegistersAndConnects();
         clearInvocations(mDeps);
         clearInvocations(mNetworkAgent);