diff --git a/services/core/java/com/android/server/vcn/VcnGatewayConnection.java b/services/core/java/com/android/server/vcn/VcnGatewayConnection.java
index 055012b..748f644 100644
--- a/services/core/java/com/android/server/vcn/VcnGatewayConnection.java
+++ b/services/core/java/com/android/server/vcn/VcnGatewayConnection.java
@@ -78,6 +78,7 @@
 import android.os.Process;
 import android.os.SystemClock;
 import android.provider.Settings;
+import android.telephony.TelephonyManager;
 import android.util.ArraySet;
 import android.util.Slog;
 
@@ -162,6 +163,14 @@
 public class VcnGatewayConnection extends StateMachine {
     private static final String TAG = VcnGatewayConnection.class.getSimpleName();
 
+    // Matches DataConnection.NETWORK_TYPE private constant, and magic string from
+    // ConnectivityManager#getNetworkTypeName()
+    @VisibleForTesting(visibility = Visibility.PRIVATE)
+    static final String NETWORK_INFO_NETWORK_TYPE_STRING = "MOBILE";
+
+    @VisibleForTesting(visibility = Visibility.PRIVATE)
+    static final String NETWORK_INFO_EXTRA_INFO = "VCN";
+
     @VisibleForTesting(visibility = Visibility.PRIVATE)
     static final InetAddress DUMMY_ADDR = InetAddresses.parseNumericAddress("192.0.2.0");
 
@@ -1625,6 +1634,12 @@
             final NetworkAgentConfig nac =
                     new NetworkAgentConfig.Builder()
                             .setLegacyType(ConnectivityManager.TYPE_MOBILE)
+                            .setLegacyTypeName(NETWORK_INFO_NETWORK_TYPE_STRING)
+                            .setLegacySubType(TelephonyManager.NETWORK_TYPE_UNKNOWN)
+                            .setLegacySubTypeName(
+                                    TelephonyManager.getNetworkTypeName(
+                                            TelephonyManager.NETWORK_TYPE_UNKNOWN))
+                            .setLegacyExtraInfo(NETWORK_INFO_EXTRA_INFO)
                             .build();
 
             final VcnNetworkAgent agent =
diff --git a/tests/vcn/java/com/android/server/vcn/VcnGatewayConnectionConnectedStateTest.java b/tests/vcn/java/com/android/server/vcn/VcnGatewayConnectionConnectedStateTest.java
index 7b5f0b1..a687bb893 100644
--- a/tests/vcn/java/com/android/server/vcn/VcnGatewayConnectionConnectedStateTest.java
+++ b/tests/vcn/java/com/android/server/vcn/VcnGatewayConnectionConnectedStateTest.java
@@ -307,7 +307,10 @@
                         ncCaptor.capture(),
                         lpCaptor.capture(),
                         any(),
-                        argThat(nac -> nac.getLegacyType() == ConnectivityManager.TYPE_MOBILE),
+                        // Subtype integer/name and extras do not have getters; cannot be tested.
+                        argThat(nac -> nac.getLegacyType() == ConnectivityManager.TYPE_MOBILE
+                                && nac.getLegacyTypeName().equals(
+                                        VcnGatewayConnection.NETWORK_INFO_NETWORK_TYPE_STRING)),
                         any(),
                         any(),
                         any());