diff --git a/framework-t/Android.bp b/framework-t/Android.bp
index 2ab69b8..f46d887 100644
--- a/framework-t/Android.bp
+++ b/framework-t/Android.bp
@@ -127,6 +127,7 @@
         "//frameworks/base/tests/vcn",
         "//frameworks/libs/net/common/testutils",
         "//frameworks/libs/net/common/tests:__subpackages__",
+        "//frameworks/opt/net/ethernet/tests:__subpackages__",
         "//frameworks/opt/telephony/tests/telephonytests",
         "//packages/modules/CaptivePortalLogin/tests",
         "//packages/modules/Connectivity/Tethering/tests:__subpackages__",
diff --git a/framework-t/api/current.txt b/framework-t/api/current.txt
index 3d6fb3e..4fefa0a 100644
--- a/framework-t/api/current.txt
+++ b/framework-t/api/current.txt
@@ -61,6 +61,14 @@
 
 package android.net {
 
+  public final class EthernetNetworkSpecifier extends android.net.NetworkSpecifier implements android.os.Parcelable {
+    ctor public EthernetNetworkSpecifier(@NonNull String);
+    method public int describeContents();
+    method @Nullable public String getInterfaceName();
+    method public void writeToParcel(@NonNull android.os.Parcel, int);
+    field @NonNull public static final android.os.Parcelable.Creator<android.net.EthernetNetworkSpecifier> CREATOR;
+  }
+
   public final class IpSecAlgorithm implements android.os.Parcelable {
     ctor public IpSecAlgorithm(@NonNull String, @NonNull byte[]);
     ctor public IpSecAlgorithm(@NonNull String, @NonNull byte[], int);
diff --git a/framework-t/api/module-lib-current.txt b/framework-t/api/module-lib-current.txt
index aaaa628..75a8625 100644
--- a/framework-t/api/module-lib-current.txt
+++ b/framework-t/api/module-lib-current.txt
@@ -31,6 +31,22 @@
     method public static void registerServiceWrappers();
   }
 
+  public class EthernetManager {
+    method @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE) public void addInterfaceStateListener(@NonNull java.util.concurrent.Executor, @NonNull android.net.EthernetManager.InterfaceStateListener);
+    method public void removeInterfaceStateListener(@NonNull android.net.EthernetManager.InterfaceStateListener);
+    method public void setIncludeTestInterfaces(boolean);
+    field public static final int ROLE_CLIENT = 1; // 0x1
+    field public static final int ROLE_NONE = 0; // 0x0
+    field public static final int ROLE_SERVER = 2; // 0x2
+    field public static final int STATE_ABSENT = 0; // 0x0
+    field public static final int STATE_LINK_DOWN = 1; // 0x1
+    field public static final int STATE_LINK_UP = 2; // 0x2
+  }
+
+  public static interface EthernetManager.InterfaceStateListener {
+    method public void onInterfaceStateChanged(@NonNull String, int, int, @Nullable android.net.IpConfiguration);
+  }
+
   public class IpSecManager {
     field public static final int DIRECTION_FWD = 2; // 0x2
   }
diff --git a/framework-t/api/system-current.txt b/framework-t/api/system-current.txt
index 4035e9b..c502f72 100644
--- a/framework-t/api/system-current.txt
+++ b/framework-t/api/system-current.txt
@@ -12,6 +12,45 @@
 
 package android.net {
 
+  public class EthernetManager {
+    method @RequiresPermission(anyOf={android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, android.Manifest.permission.NETWORK_STACK, android.Manifest.permission.MANAGE_ETHERNET_NETWORKS}) public void connectNetwork(@NonNull String, @Nullable java.util.concurrent.Executor, @Nullable java.util.function.BiConsumer<android.net.Network,android.net.EthernetNetworkManagementException>);
+    method @RequiresPermission(anyOf={android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, android.Manifest.permission.NETWORK_STACK, android.Manifest.permission.MANAGE_ETHERNET_NETWORKS}) public void disconnectNetwork(@NonNull String, @Nullable java.util.concurrent.Executor, @Nullable java.util.function.BiConsumer<android.net.Network,android.net.EthernetNetworkManagementException>);
+    method @NonNull @RequiresPermission(anyOf={android.Manifest.permission.NETWORK_STACK, android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK}) public android.net.EthernetManager.TetheredInterfaceRequest requestTetheredInterface(@NonNull java.util.concurrent.Executor, @NonNull android.net.EthernetManager.TetheredInterfaceCallback);
+    method @RequiresPermission(anyOf={android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, android.Manifest.permission.NETWORK_STACK, android.Manifest.permission.MANAGE_ETHERNET_NETWORKS}) public void updateConfiguration(@NonNull String, @NonNull android.net.EthernetNetworkUpdateRequest, @Nullable java.util.concurrent.Executor, @Nullable java.util.function.BiConsumer<android.net.Network,android.net.EthernetNetworkManagementException>);
+  }
+
+  public static interface EthernetManager.TetheredInterfaceCallback {
+    method public void onAvailable(@NonNull String);
+    method public void onUnavailable();
+  }
+
+  public static class EthernetManager.TetheredInterfaceRequest {
+    method public void release();
+  }
+
+  public final class EthernetNetworkManagementException extends java.lang.RuntimeException implements android.os.Parcelable {
+    ctor public EthernetNetworkManagementException(@NonNull String);
+    method public int describeContents();
+    method public void writeToParcel(@NonNull android.os.Parcel, int);
+    field @NonNull public static final android.os.Parcelable.Creator<android.net.EthernetNetworkManagementException> CREATOR;
+  }
+
+  public final class EthernetNetworkUpdateRequest implements android.os.Parcelable {
+    method public int describeContents();
+    method @NonNull public android.net.IpConfiguration getIpConfiguration();
+    method @Nullable public android.net.NetworkCapabilities getNetworkCapabilities();
+    method public void writeToParcel(@NonNull android.os.Parcel, int);
+    field @NonNull public static final android.os.Parcelable.Creator<android.net.EthernetNetworkUpdateRequest> CREATOR;
+  }
+
+  public static final class EthernetNetworkUpdateRequest.Builder {
+    ctor public EthernetNetworkUpdateRequest.Builder();
+    ctor public EthernetNetworkUpdateRequest.Builder(@NonNull android.net.EthernetNetworkUpdateRequest);
+    method @NonNull public android.net.EthernetNetworkUpdateRequest build();
+    method @NonNull public android.net.EthernetNetworkUpdateRequest.Builder setIpConfiguration(@NonNull android.net.IpConfiguration);
+    method @NonNull public android.net.EthernetNetworkUpdateRequest.Builder setNetworkCapabilities(@Nullable android.net.NetworkCapabilities);
+  }
+
   public class IpSecManager {
     method @RequiresPermission(android.Manifest.permission.MANAGE_IPSEC_TUNNELS) public void applyTunnelModeTransform(@NonNull android.net.IpSecManager.IpSecTunnelInterface, int, @NonNull android.net.IpSecTransform) throws java.io.IOException;
     method @NonNull @RequiresPermission(android.Manifest.permission.MANAGE_IPSEC_TUNNELS) public android.net.IpSecManager.IpSecTunnelInterface createIpSecTunnelInterface(@NonNull java.net.InetAddress, @NonNull java.net.InetAddress, @NonNull android.net.Network) throws java.io.IOException, android.net.IpSecManager.ResourceUnavailableException;
diff --git a/framework/Android.bp b/framework/Android.bp
index 66b662b..53f9217 100644
--- a/framework/Android.bp
+++ b/framework/Android.bp
@@ -86,6 +86,7 @@
     ],
     static_libs: [
         "framework-connectivity-protos",
+        "modules-utils-backgroundthread",
         "modules-utils-build",
         "modules-utils-preconditions",
     ],
@@ -139,6 +140,7 @@
         "//frameworks/base/tests/vcn",
         "//frameworks/libs/net/common/testutils",
         "//frameworks/libs/net/common/tests:__subpackages__",
+        "//frameworks/opt/net/ethernet/tests:__subpackages__",
         "//frameworks/opt/telephony/tests/telephonytests",
         "//packages/modules/CaptivePortalLogin/tests",
         "//packages/modules/Connectivity/Tethering/tests:__subpackages__",
diff --git a/service-t/Android.bp b/service-t/Android.bp
index 3146a93..8851554 100644
--- a/service-t/Android.bp
+++ b/service-t/Android.bp
@@ -30,6 +30,7 @@
     min_sdk_version: "30",
     srcs: [
         "src/**/*.java",
+        ":ethernet-service-updatable-sources",
         ":services.connectivity-tiramisu-updatable-sources",
     ],
     libs: [
@@ -39,6 +40,7 @@
         "framework-tethering.stubs.module_lib",
         "service-connectivity-pre-jarjar",
         "service-nearby-pre-jarjar",
+        "ServiceConnectivityResources",
         "unsupportedappusage",
     ],
     static_libs: [
diff --git a/service-t/src/com/android/server/ConnectivityServiceInitializer.java b/service-t/src/com/android/server/ConnectivityServiceInitializer.java
index 25fe5e9..7b1cd61 100644
--- a/service-t/src/com/android/server/ConnectivityServiceInitializer.java
+++ b/service-t/src/com/android/server/ConnectivityServiceInitializer.java
@@ -21,6 +21,8 @@
 
 import com.android.modules.utils.build.SdkLevel;
 import com.android.networkstack.apishim.ConstantsShim;
+import com.android.server.ethernet.EthernetService;
+import com.android.server.ethernet.EthernetServiceImpl;
 import com.android.server.nearby.NearbyService;
 
 /**
@@ -29,15 +31,19 @@
  */
 public final class ConnectivityServiceInitializer extends SystemService {
     private static final String TAG = ConnectivityServiceInitializer.class.getSimpleName();
+    private final Context mContext;
     private final ConnectivityService mConnectivity;
     private final IpSecService mIpSecService;
     private final NsdService mNsdService;
     private final NearbyService mNearbyService;
+    private final EthernetServiceImpl mEthernetServiceImpl;
 
     public ConnectivityServiceInitializer(Context context) {
         super(context);
+        mContext = context;
         // Load JNI libraries used by ConnectivityService and its dependencies
         System.loadLibrary("service-connectivity");
+        mEthernetServiceImpl = createEthernetService(context);
         mConnectivity = new ConnectivityService(context);
         mIpSecService = createIpSecService(context);
         mNsdService = createNsdService(context);
@@ -46,6 +52,12 @@
 
     @Override
     public void onStart() {
+        if (mConnectivity.deviceSupportsEthernet(mContext)) {
+            Log.i(TAG, "Registering " + Context.ETHERNET_SERVICE);
+            publishBinderService(Context.ETHERNET_SERVICE, mEthernetServiceImpl,
+                    /* allowIsolated= */ false);
+        }
+
         Log.i(TAG, "Registering " + Context.CONNECTIVITY_SERVICE);
         publishBinderService(Context.CONNECTIVITY_SERVICE, mConnectivity,
                 /* allowIsolated= */ false);
@@ -65,6 +77,7 @@
             publishBinderService(ConstantsShim.NEARBY_SERVICE, mNearbyService,
                     /* allowIsolated= */ false);
         }
+
     }
 
     @Override
@@ -72,6 +85,10 @@
         if (mNearbyService != null) {
             mNearbyService.onBootPhase(phase);
         }
+
+        if (phase == SystemService.PHASE_SYSTEM_SERVICES_READY && mEthernetServiceImpl != null) {
+            mEthernetServiceImpl.start();
+        }
     }
 
     /**
@@ -106,4 +123,15 @@
             return null;
         }
     }
+
+    /**
+     * Return EthernetServiceImpl instance or null if current SDK is lower than T or Ethernet
+     * service isn't necessary.
+     */
+    private EthernetServiceImpl createEthernetService(final Context context) {
+        if (!SdkLevel.isAtLeastT() || !mConnectivity.deviceSupportsEthernet(context)) {
+            return null;
+        }
+        return EthernetService.create(context);
+    }
 }
diff --git a/service/Android.bp b/service/Android.bp
index aed4b1e..0e6fe92 100644
--- a/service/Android.bp
+++ b/service/Android.bp
@@ -114,6 +114,7 @@
         "net-utils-device-common",
         "net-utils-device-common-bpf",
         "net-utils-device-common-netlink",
+        "net-utils-services-common",
         "netd-client",
         "networkstack-client",
         "PlatformProperties",
diff --git a/service/ServiceConnectivityResources/res/values/config.xml b/service/ServiceConnectivityResources/res/values/config.xml
index f8f86a2..faa9998 100644
--- a/service/ServiceConnectivityResources/res/values/config.xml
+++ b/service/ServiceConnectivityResources/res/values/config.xml
@@ -136,4 +136,36 @@
          extreme adverse effects on performance of the new network.
     -->
     <bool translatable="false" name="config_cellular_radio_timesharing_capable">true</bool>
+
+    <!-- Configure ethernet tcp buffersizes in the form:
+         rmem_min,rmem_def,rmem_max,wmem_min,wmem_def,wmem_max -->
+    <string translatable="false" name="config_ethernet_tcp_buffers">524288,1048576,3145728,524288,1048576,2097152</string>
+
+    <!-- Configuration of Ethernet interfaces in the following format:
+         <interface name|mac address>;[Network Capabilities];[IP config];[Override Transport]
+         Where
+               [Network Capabilities] Optional. A comma separated list of network capabilities.
+                   Values must be from NetworkCapabilities#NET_CAPABILITY_* constants.
+                   The NOT_ROAMING, NOT_CONGESTED and NOT_SUSPENDED capabilities are always
+                   added automatically because this configuration provides no way to update
+                   them dynamically.
+               [IP config] Optional. If empty or not specified - DHCP will be used, otherwise
+                   use the following format to specify static IP configuration:
+                       ip=<ip-address/mask> gateway=<ip-address> dns=<comma-sep-ip-addresses>
+                       domains=<comma-sep-domains>
+               [Override Transport] Optional. An override network transport type to allow
+                    the propagation of an interface type on the other end of a local Ethernet
+                    interface. Value must be from NetworkCapabilities#TRANSPORT_* constants. If
+                    left out, this will default to TRANSPORT_ETHERNET.
+         -->
+    <string-array translatable="false" name="config_ethernet_interfaces">
+        <!--
+        <item>eth1;12,13,14,15;ip=192.168.0.10/24 gateway=192.168.0.1 dns=4.4.4.4,8.8.8.8</item>
+        <item>eth2;;ip=192.168.0.11/24</item>
+        <item>eth3;12,13,14,15;ip=192.168.0.12/24;1</item>
+        -->
+    </string-array>
+
+    <!-- Regex of wired ethernet ifaces -->
+    <string translatable="false" name="config_ethernet_iface_regex">eth\\d</string>
 </resources>
diff --git a/service/ServiceConnectivityResources/res/values/overlayable.xml b/service/ServiceConnectivityResources/res/values/overlayable.xml
index e5010d7..9fa6a30 100644
--- a/service/ServiceConnectivityResources/res/values/overlayable.xml
+++ b/service/ServiceConnectivityResources/res/values/overlayable.xml
@@ -37,6 +37,9 @@
             <item type="drawable" name="stat_notify_wifi_in_range"/>
             <item type="drawable" name="stat_notify_rssi_in_range"/>
             <item type="bool" name="config_cellular_radio_timesharing_capable" />
+            <item type="string" name="config_ethernet_tcp_buffers"/>
+            <item type="array" name="config_ethernet_interfaces"/>
+            <item type="string" name="config_ethernet_iface_regex"/>
         </policy>
     </overlayable>
 </resources>
diff --git a/service/src/com/android/server/ConnectivityService.java b/service/src/com/android/server/ConnectivityService.java
index fa8f339..418e4df 100644
--- a/service/src/com/android/server/ConnectivityService.java
+++ b/service/src/com/android/server/ConnectivityService.java
@@ -936,7 +936,7 @@
             }
             // Ethernet is often not specified in the configs, although many devices can use it via
             // USB host adapters. Add it as long as the ethernet service is here.
-            if (ctx.getSystemService(Context.ETHERNET_SERVICE) != null) {
+            if (deviceSupportsEthernet(ctx)) {
                 addSupportedType(TYPE_ETHERNET);
             }
 
@@ -1621,6 +1621,15 @@
                 mContext);
     }
 
+    /**
+     * Check whether or not the device supports Ethernet transport.
+     */
+    public static boolean deviceSupportsEthernet(final Context context) {
+        final PackageManager pm = context.getPackageManager();
+        return pm.hasSystemFeature(PackageManager.FEATURE_ETHERNET)
+                || pm.hasSystemFeature(PackageManager.FEATURE_USB_HOST);
+    }
+
     private static NetworkCapabilities createDefaultNetworkCapabilitiesForUid(int uid) {
         return createDefaultNetworkCapabilitiesForUidRangeSet(Collections.singleton(
                 new UidRange(uid, uid)));
diff --git a/tests/unit/java/com/android/server/ConnectivityServiceTest.java b/tests/unit/java/com/android/server/ConnectivityServiceTest.java
index c8dc107..94272b8 100644
--- a/tests/unit/java/com/android/server/ConnectivityServiceTest.java
+++ b/tests/unit/java/com/android/server/ConnectivityServiceTest.java
@@ -36,6 +36,7 @@
 import static android.content.Intent.ACTION_USER_REMOVED;
 import static android.content.Intent.ACTION_USER_UNLOCKED;
 import static android.content.pm.PackageInfo.REQUESTED_PERMISSION_GRANTED;
+import static android.content.pm.PackageManager.FEATURE_ETHERNET;
 import static android.content.pm.PackageManager.FEATURE_WIFI;
 import static android.content.pm.PackageManager.FEATURE_WIFI_DIRECT;
 import static android.content.pm.PackageManager.GET_PERMISSIONS;
@@ -1739,6 +1740,7 @@
         mockDefaultPackages();
         mockHasSystemFeature(FEATURE_WIFI, true);
         mockHasSystemFeature(FEATURE_WIFI_DIRECT, true);
+        mockHasSystemFeature(FEATURE_ETHERNET, true);
         doReturn(true).when(mTelephonyManager).isDataCapable();
 
         FakeSettingsProvider.clearSettingsProvider();
diff --git a/tests/unit/java/com/android/server/LegacyTypeTrackerTest.kt b/tests/unit/java/com/android/server/LegacyTypeTrackerTest.kt
index 64736f2..7ed55e5 100644
--- a/tests/unit/java/com/android/server/LegacyTypeTrackerTest.kt
+++ b/tests/unit/java/com/android/server/LegacyTypeTrackerTest.kt
@@ -23,6 +23,8 @@
 
 import android.content.Context
 import android.content.pm.PackageManager
+import android.content.pm.PackageManager.FEATURE_ETHERNET
+import android.content.pm.PackageManager.FEATURE_USB_HOST
 import android.content.pm.PackageManager.FEATURE_WIFI
 import android.content.pm.PackageManager.FEATURE_WIFI_DIRECT
 import android.net.ConnectivityManager.TYPE_ETHERNET
@@ -40,7 +42,6 @@
 import android.net.ConnectivityManager.TYPE_WIFI
 import android.net.ConnectivityManager.TYPE_WIFI_P2P
 import android.net.ConnectivityManager.TYPE_WIMAX
-import android.net.EthernetManager
 import android.net.NetworkInfo.DetailedState.CONNECTED
 import android.net.NetworkInfo.DetailedState.DISCONNECTED
 import android.os.Build
@@ -82,9 +83,8 @@
     private val mContext = mock(Context::class.java).apply {
         doReturn(true).`when`(mPm).hasSystemFeature(FEATURE_WIFI)
         doReturn(true).`when`(mPm).hasSystemFeature(FEATURE_WIFI_DIRECT)
+        doReturn(true).`when`(mPm).hasSystemFeature(FEATURE_ETHERNET)
         doReturn(mPm).`when`(this).packageManager
-        doReturn(mock(EthernetManager::class.java)).`when`(this).getSystemService(
-                Context.ETHERNET_SERVICE)
     }
     private val mTm = mock(TelephonyManager::class.java).apply {
         doReturn(true).`when`(this).isDataCapable
@@ -105,7 +105,8 @@
 
     @Test
     fun testSupportedTypes_NoEthernet() {
-        doReturn(null).`when`(mContext).getSystemService(Context.ETHERNET_SERVICE)
+        doReturn(false).`when`(mPm).hasSystemFeature(FEATURE_ETHERNET)
+        doReturn(false).`when`(mPm).hasSystemFeature(FEATURE_USB_HOST)
         assertFalse(makeTracker().isTypeSupported(TYPE_ETHERNET))
     }