From 96af36898187584ea41fe9927d80d5f34125d591 Mon Sep 17 00:00:00 2001
From: rongli <rongli@nestlabs.com>
Date: Tue, 27 Sep 2016 00:59:28 +0800
Subject: [PATCH] Only reset valid neighbor router if not heard for
 kMaxNeighborAge (#685)

---
 src/core/thread/mle_router.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/core/thread/mle_router.cpp b/src/core/thread/mle_router.cpp
index 81cff7507..cac7bc4ae 100644
--- a/src/core/thread/mle_router.cpp
+++ b/src/core/thread/mle_router.cpp
@@ -1704,7 +1704,7 @@ void MleRouter::HandleStateUpdateTimer(void)
     // update router state
     for (uint8_t i = 0; i <= kMaxRouterId; i++)
     {
-        if (mRouters[i].mState != Neighbor::kStateInvalid)
+        if (mRouters[i].mState == Neighbor::kStateValid)
         {
             if ((Timer::GetNow() - mRouters[i].mLastHeard) >= Timer::SecToMsec(kMaxNeighborAge))
             {