diff --git a/model/ndn-global-router.cpp b/model/ndn-global-router.cpp
index 136c388..de853b7 100644
--- a/model/ndn-global-router.cpp
+++ b/model/ndn-global-router.cpp
@@ -89,11 +89,11 @@
   return m_localPrefixes;
 }
 
-// void
-// GlobalRouter::AddIncidencyChannel (Ptr< NdnFace > face, Ptr< Channel > channel)
-// {
-//   m_incidenciesChannel.push_back (make_tuple (face, channel));
-// }
+void
+GlobalRouter::clear()
+{
+  m_idCounter = 0;
+}
 
 } // namespace ndn
 } // namespace ns3
diff --git a/model/ndn-global-router.hpp b/model/ndn-global-router.hpp
index 4713a5b..f19e8f4 100644
--- a/model/ndn-global-router.hpp
+++ b/model/ndn-global-router.hpp
@@ -108,7 +108,12 @@
   const LocalPrefixList&
   GetLocalPrefixes() const;
 
-  // ??
+  /**
+   * @brief Clear global state
+   */
+  static void
+  clear();
+
 protected:
   virtual void
   NotifyNewAggregate(); ///< @brief Notify when the object is aggregated to another object (e.g.,