diff --git a/framework-t/src/android/net/EthernetManager.java b/framework-t/src/android/net/EthernetManager.java
index 2b76dd935f..886d19499c 100644
--- a/framework-t/src/android/net/EthernetManager.java
+++ b/framework-t/src/android/net/EthernetManager.java
@@ -32,13 +32,13 @@ import android.content.pm.PackageManager;
 import android.os.Build;
 import android.os.OutcomeReceiver;
 import android.os.RemoteException;
+import android.util.ArrayMap;
 
 import com.android.internal.annotations.GuardedBy;
 import com.android.modules.utils.BackgroundThread;
 
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
-import java.util.ArrayList;
 import java.util.List;
 import java.util.Objects;
 import java.util.concurrent.Executor;
@@ -56,37 +56,12 @@ public class EthernetManager {
 
     private final IEthernetManager mService;
     @GuardedBy("mListenerLock")
-    private final ArrayList<ListenerInfo<InterfaceStateListener>> mIfaceListeners =
-            new ArrayList<>();
+    private final ArrayMap<InterfaceStateListener, IEthernetServiceListener>
+            mIfaceServiceListeners = new ArrayMap<>();
     @GuardedBy("mListenerLock")
-    private final ArrayList<ListenerInfo<IntConsumer>> mEthernetStateListeners =
-            new ArrayList<>();
+    private final ArrayMap<IntConsumer, IEthernetServiceListener> mStateServiceListeners =
+            new ArrayMap<>();
     final Object mListenerLock = new Object();
-    private final IEthernetServiceListener.Stub mServiceListener =
-            new IEthernetServiceListener.Stub() {
-                @Override
-                public void onEthernetStateChanged(int state) {
-                    synchronized (mListenerLock) {
-                        for (ListenerInfo<IntConsumer> li : mEthernetStateListeners) {
-                            li.executor.execute(() -> {
-                                li.listener.accept(state);
-                            });
-                        }
-                    }
-                }
-
-                @Override
-                public void onInterfaceStateChanged(String iface, int state, int role,
-                        IpConfiguration configuration) {
-                    synchronized (mListenerLock) {
-                        for (ListenerInfo<InterfaceStateListener> li : mIfaceListeners) {
-                            li.executor.execute(() ->
-                                    li.listener.onInterfaceStateChanged(iface, state, role,
-                                            configuration));
-                        }
-                    }
-                }
-            };
 
     /**
      * Indicates that Ethernet is disabled.
@@ -104,18 +79,6 @@ public class EthernetManager {
     @SystemApi(client = MODULE_LIBRARIES)
     public static final int ETHERNET_STATE_ENABLED  = 1;
 
-    private static class ListenerInfo<T> {
-        @NonNull
-        public final Executor executor;
-        @NonNull
-        public final T listener;
-
-        private ListenerInfo(@NonNull Executor executor, @NonNull T listener) {
-            this.executor = executor;
-            this.listener = listener;
-        }
-    }
-
     /**
      * The interface is absent.
      * @hide
@@ -323,18 +286,28 @@ public class EthernetManager {
         if (listener == null || executor == null) {
             throw new NullPointerException("listener and executor must not be null");
         }
+
+        final IEthernetServiceListener.Stub serviceListener = new IEthernetServiceListener.Stub() {
+            @Override
+            public void onEthernetStateChanged(int state) {}
+
+            @Override
+            public void onInterfaceStateChanged(String iface, int state, int role,
+                    IpConfiguration configuration) {
+                executor.execute(() ->
+                        listener.onInterfaceStateChanged(iface, state, role, configuration));
+            }
+        };
         synchronized (mListenerLock) {
-            maybeAddServiceListener();
-            mIfaceListeners.add(new ListenerInfo<InterfaceStateListener>(executor, listener));
+            addServiceListener(serviceListener);
+            mIfaceServiceListeners.put(listener, serviceListener);
         }
     }
 
     @GuardedBy("mListenerLock")
-    private void maybeAddServiceListener() {
-        if (!mIfaceListeners.isEmpty() || !mEthernetStateListeners.isEmpty()) return;
-
+    private void addServiceListener(@NonNull final IEthernetServiceListener listener) {
         try {
-            mService.addListener(mServiceListener);
+            mService.addListener(listener);
         } catch (RemoteException e) {
             throw e.rethrowFromSystemServer();
         }
@@ -364,17 +337,16 @@ public class EthernetManager {
     public void removeInterfaceStateListener(@NonNull InterfaceStateListener listener) {
         Objects.requireNonNull(listener);
         synchronized (mListenerLock) {
-            mIfaceListeners.removeIf(l -> l.listener == listener);
-            maybeRemoveServiceListener();
+            maybeRemoveServiceListener(mIfaceServiceListeners.remove(listener));
         }
     }
 
     @GuardedBy("mListenerLock")
-    private void maybeRemoveServiceListener() {
-        if (!mIfaceListeners.isEmpty() || !mEthernetStateListeners.isEmpty()) return;
+    private void maybeRemoveServiceListener(@Nullable final IEthernetServiceListener listener) {
+        if (listener == null) return;
 
         try {
-            mService.removeListener(mServiceListener);
+            mService.removeListener(listener);
         } catch (RemoteException e) {
             throw e.rethrowFromSystemServer();
         }
@@ -687,9 +659,19 @@ public class EthernetManager {
             @NonNull IntConsumer listener) {
         Objects.requireNonNull(executor);
         Objects.requireNonNull(listener);
+        final IEthernetServiceListener.Stub serviceListener = new IEthernetServiceListener.Stub() {
+            @Override
+            public void onEthernetStateChanged(int state) {
+                executor.execute(() -> listener.accept(state));
+            }
+
+            @Override
+            public void onInterfaceStateChanged(String iface, int state, int role,
+                    IpConfiguration configuration) {}
+        };
         synchronized (mListenerLock) {
-            maybeAddServiceListener();
-            mEthernetStateListeners.add(new ListenerInfo<IntConsumer>(executor, listener));
+            addServiceListener(serviceListener);
+            mStateServiceListeners.put(listener, serviceListener);
         }
     }
 
@@ -705,8 +687,7 @@ public class EthernetManager {
     public void removeEthernetStateListener(@NonNull IntConsumer listener) {
         Objects.requireNonNull(listener);
         synchronized (mListenerLock) {
-            mEthernetStateListeners.removeIf(l -> l.listener == listener);
-            maybeRemoveServiceListener();
+            maybeRemoveServiceListener(mStateServiceListeners.remove(listener));
         }
     }
 
diff --git a/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt b/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt
index f7a2421b45..04434e545c 100644
--- a/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt
+++ b/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt
@@ -75,7 +75,7 @@ class EthernetManagerTest {
     private val em by lazy { EthernetManagerShimImpl.newInstance(context) }
 
     private val createdIfaces = ArrayList<EthernetTestInterface>()
-    private val addedListeners = ArrayList<InterfaceStateListener>()
+    private val addedListeners = ArrayList<EthernetStateListener>()
 
     private class EthernetTestInterface(
         context: Context,
@@ -171,7 +171,7 @@ class EthernetManagerTest {
         }
     }
 
-    private fun addInterfaceStateListener(executor: Executor, listener: InterfaceStateListener) {
+    private fun addInterfaceStateListener(executor: Executor, listener: EthernetStateListener) {
         em.addInterfaceStateListener(executor, listener)
         addedListeners.add(listener)
     }
@@ -212,15 +212,25 @@ class EthernetManagerTest {
         listener.expectCallback(iface2, STATE_LINK_DOWN, ROLE_CLIENT)
         listener.expectCallback(iface2, STATE_LINK_UP, ROLE_CLIENT)
 
+        // Register a new listener, it should see state of all existing interfaces immediately.
+        val listener2 = EthernetStateListener()
+        addInterfaceStateListener(executor, listener2)
+        listener2.expectCallback(iface, STATE_LINK_UP, ROLE_CLIENT)
+        listener2.expectCallback(iface2, STATE_LINK_UP, ROLE_CLIENT)
+
         // Removing interfaces first sends link down, then STATE_ABSENT/ROLE_NONE.
         removeInterface(iface)
-        listener.expectCallback(iface, STATE_LINK_DOWN, ROLE_CLIENT)
-        listener.expectCallback(iface, STATE_ABSENT, ROLE_NONE)
+        for (listener in addedListeners) {
+            listener.expectCallback(iface, STATE_LINK_DOWN, ROLE_CLIENT)
+            listener.expectCallback(iface, STATE_ABSENT, ROLE_NONE)
+        }
 
         removeInterface(iface2)
-        listener.expectCallback(iface2, STATE_LINK_DOWN, ROLE_CLIENT)
-        listener.expectCallback(iface2, STATE_ABSENT, ROLE_NONE)
-        listener.assertNoCallback()
+        for (listener in addedListeners) {
+            listener.expectCallback(iface2, STATE_LINK_DOWN, ROLE_CLIENT)
+            listener.expectCallback(iface2, STATE_ABSENT, ROLE_NONE)
+            listener.assertNoCallback()
+        }
     }
 
     @Test