From 9f55322d36d113fde31b2fea3c6fd5866d136648 Mon Sep 17 00:00:00 2001
From: rongli <rongli@nestlabs.com>
Date: Tue, 2 Oct 2018 17:34:58 +0800
Subject: [PATCH] [thci] fix preferred flag when config border router (#3112)

---
 tools/harness-thci/OpenThread_WpanCtl.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/harness-thci/OpenThread_WpanCtl.py b/tools/harness-thci/OpenThread_WpanCtl.py
index e9fd433b2..f3545160f 100644
--- a/tools/harness-thci/OpenThread_WpanCtl.py
+++ b/tools/harness-thci/OpenThread_WpanCtl.py
@@ -1595,7 +1595,7 @@ class OpenThread_WpanCtl(IThci):
             parameter = ''
 
             if P_slaac_preferred == 1:
-                parameter += ' -a'
+                parameter += ' -a -f'
 
             if P_stable == 1:
                 parameter += ' -s'