From a88bf4cef59b0facdf37f09abae425064c61c619 Mon Sep 17 00:00:00 2001
From: Shu Chen <chenshu@google.com>
Date: Wed, 4 Jan 2017 01:12:56 +0800
Subject: [PATCH] Trigger attach if device fails to start Router
 Synchronization process (#1104)

---
 src/core/thread/mle.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/core/thread/mle.cpp b/src/core/thread/mle.cpp
index 3e663865d..b4cac2f1e 100644
--- a/src/core/thread/mle.cpp
+++ b/src/core/thread/mle.cpp
@@ -224,7 +224,10 @@ ThreadError Mle::Start(bool aEnableReattach)
     }
     else if (IsActiveRouter(GetRloc16()))
     {
-        mMleRouter.BecomeRouter(ThreadStatusTlv::kTooFewRouters);
+        if (mMleRouter.BecomeRouter(ThreadStatusTlv::kTooFewRouters) != kThreadError_None)
+        {
+            BecomeChild(kMleAttachAnyPartition);
+        }
     }
     else
     {