diff --git a/tools/harness-thci/OpenThread.py b/tools/harness-thci/OpenThread.py
index 43f6c2fba..0721c2ac3 100644
--- a/tools/harness-thci/OpenThread.py
+++ b/tools/harness-thci/OpenThread.py
@@ -263,7 +263,7 @@ class OpenThreadTHCI(object):
     def log(self, fmt, *args):
         try:
             msg = fmt % args
-            logging.info('%s - %s', self, msg)
+            print('%s - %s - %s' % (self.port, time.strftime('%b %d %H:%M:%S'), msg))
         except Exception:
             pass
 
@@ -1272,6 +1272,8 @@ class OpenThreadTHCI(object):
         self.__sendCommand('factoryreset', expectEcho=False)
         self.sleep(0.5)
 
+        self._onReset()
+
     @API
     def removeRouter(self, xRouterId):
         """kickoff router with a given router id from the Thread Network
@@ -3045,6 +3047,9 @@ class OpenThread(OpenThreadTHCI, IThci):
             self.__handle.close()
             self.__handle = None
 
+    def _onReset(self):
+        pass
+
     def __socRead(self, size=512):
         if self._is_net:
             return self.__handle.recv(size)
diff --git a/tools/harness-thci/OpenThread_BR.py b/tools/harness-thci/OpenThread_BR.py
index 54d7ebe87..4a7a6f452 100644
--- a/tools/harness-thci/OpenThread_BR.py
+++ b/tools/harness-thci/OpenThread_BR.py
@@ -61,6 +61,7 @@ class SSHHandle(object):
 
     def __init__(self, ip, port, username, password):
         import paramiko
+        self.port = '%s:%d' % (ip, port)
         self.__handle = paramiko.SSHClient()
         self.__handle.set_missing_host_key_policy(paramiko.AutoAddPolicy())
         self.__handle.connect(ip, port=int(port), username=username, password=password)
@@ -118,13 +119,6 @@ def SerialHandle(object):
 
         self.bash('stty cols 256')
 
-    def log(self, fmt, *args):
-        try:
-            msg = fmt % args
-            logging.info('%s - %s', self.port, msg)
-        except Exception:
-            pass
-
     def close(self):
         self.__handle.close()
 
@@ -266,7 +260,10 @@ class OpenThread_BR(OpenThreadTHCI, IThci):
             self.__handle.close()
             self.__handle = None
 
-    @watched
+    def _onReset(self):
+        self.__dumpSyslog()
+        self.__truncateSyslog()
+
     def bash(self, cmd, timeout=DEFAULT_COMMAND_TIMEOUT):
         return self.__handle.bash(cmd, timeout=timeout)
 
@@ -322,3 +319,8 @@ class OpenThread_BR(OpenThreadTHCI, IThci):
 
     def __truncateSyslog(self):
         self.bash('sudo truncate -s 0 /var/log/syslog')
+
+    def __dumpSyslog(self):
+        output = self.bash('sudo grep "otbr-agent" /var/log/syslog')
+        for line in output:
+            self.log('%s', line)