diff --git a/core/java/android/bluetooth/BluetoothTetheringDataTracker.java b/core/java/android/bluetooth/BluetoothTetheringDataTracker.java
index 3ba4f26799077..43c239252bef6 100644
--- a/core/java/android/bluetooth/BluetoothTetheringDataTracker.java
+++ b/core/java/android/bluetooth/BluetoothTetheringDataTracker.java
@@ -373,4 +373,14 @@ public class BluetoothTetheringDataTracker implements NetworkStateTracker {
     public void setDependencyMet(boolean met) {
         // not supported on this network
     }
+
+    @Override
+    public void addStackedLink(LinkProperties link) {
+        mLinkProperties.addStackedLink(link);
+    }
+
+    @Override
+    public void removeStackedLink(LinkProperties link) {
+        mLinkProperties.removeStackedLink(link);
+    }
 }
diff --git a/core/java/android/net/BaseNetworkStateTracker.java b/core/java/android/net/BaseNetworkStateTracker.java
index 4b60f07d598f6..a5546116207ff 100644
--- a/core/java/android/net/BaseNetworkStateTracker.java
+++ b/core/java/android/net/BaseNetworkStateTracker.java
@@ -155,4 +155,14 @@ public abstract class BaseNetworkStateTracker implements NetworkStateTracker {
     public void setDependencyMet(boolean met) {
         // Base tracker doesn't handle dependencies
     }
+
+    @Override
+    public void addStackedLink(LinkProperties link) {
+        mLinkProperties.addStackedLink(link);
+    }
+
+    @Override
+    public void removeStackedLink(LinkProperties link) {
+        mLinkProperties.removeStackedLink(link);
+    }
 }
diff --git a/core/java/android/net/DummyDataStateTracker.java b/core/java/android/net/DummyDataStateTracker.java
index 39440c2a730f5..db8f0bcb9cfd2 100644
--- a/core/java/android/net/DummyDataStateTracker.java
+++ b/core/java/android/net/DummyDataStateTracker.java
@@ -203,6 +203,16 @@ public class DummyDataStateTracker implements NetworkStateTracker {
         // not supported on this network
     }
 
+    @Override
+    public void addStackedLink(LinkProperties link) {
+        mLinkProperties.addStackedLink(link);
+    }
+
+    @Override
+    public void removeStackedLink(LinkProperties link) {
+        mLinkProperties.removeStackedLink(link);
+    }
+
     static private void log(String s) {
         Slog.d(TAG, s);
     }
diff --git a/core/java/android/net/EthernetDataTracker.java b/core/java/android/net/EthernetDataTracker.java
index 8947162bd895d..b744a476ed676 100644
--- a/core/java/android/net/EthernetDataTracker.java
+++ b/core/java/android/net/EthernetDataTracker.java
@@ -407,4 +407,14 @@ public class EthernetDataTracker implements NetworkStateTracker {
     public void setDependencyMet(boolean met) {
         // not supported on this network
     }
+
+    @Override
+    public void addStackedLink(LinkProperties link) {
+        mLinkProperties.addStackedLink(link);
+    }
+
+    @Override
+    public void removeStackedLink(LinkProperties link) {
+        mLinkProperties.removeStackedLink(link);
+    }
 }
diff --git a/core/java/android/net/MobileDataStateTracker.java b/core/java/android/net/MobileDataStateTracker.java
index b35d61ca42c97..faf739bf5c29a 100644
--- a/core/java/android/net/MobileDataStateTracker.java
+++ b/core/java/android/net/MobileDataStateTracker.java
@@ -521,6 +521,16 @@ public class MobileDataStateTracker implements NetworkStateTracker {
         }
     }
 
+    @Override
+    public void addStackedLink(LinkProperties link) {
+        mLinkProperties.addStackedLink(link);
+    }
+
+    @Override
+    public void removeStackedLink(LinkProperties link) {
+        mLinkProperties.removeStackedLink(link);
+    }
+
     @Override
     public String toString() {
         final CharArrayWriter writer = new CharArrayWriter();
diff --git a/core/java/android/net/NetworkStateTracker.java b/core/java/android/net/NetworkStateTracker.java
index 0a0c1e06de2a7..b22159c8f5d40 100644
--- a/core/java/android/net/NetworkStateTracker.java
+++ b/core/java/android/net/NetworkStateTracker.java
@@ -197,4 +197,14 @@ public interface NetworkStateTracker {
      * An external dependency has been met/unmet
      */
     public void setDependencyMet(boolean met);
+
+    /**
+     * Informs the state tracker that another interface is stacked on top of it.
+     **/
+    public void addStackedLink(LinkProperties link);
+
+    /**
+     * Informs the state tracker that a stacked interface has been removed.
+     **/
+    public void removeStackedLink(LinkProperties link);
 }
diff --git a/wifi/java/android/net/wifi/WifiStateTracker.java b/wifi/java/android/net/wifi/WifiStateTracker.java
index 55ea34f1af6d2..81d2e114133c5 100644
--- a/wifi/java/android/net/wifi/WifiStateTracker.java
+++ b/wifi/java/android/net/wifi/WifiStateTracker.java
@@ -252,4 +252,14 @@ public class WifiStateTracker implements NetworkStateTracker {
     public void setDependencyMet(boolean met) {
         // not supported on this network
     }
+
+    @Override
+    public void addStackedLink(LinkProperties link) {
+        mLinkProperties.addStackedLink(link);
+    }
+
+    @Override
+    public void removeStackedLink(LinkProperties link) {
+        mLinkProperties.removeStackedLink(link);
+    }
 }