diff --git a/include/openthread.h b/include/openthread.h
index ea5ec44a0..98343d9c2 100644
--- a/include/openthread.h
+++ b/include/openthread.h
@@ -458,13 +458,35 @@ OTAPI uint8_t OTCALL otGetChannel(otInstance *aInstance);
  * @param[in]  aInstance A pointer to an OpenThread instance.
  * @param[in]  aChannel  The IEEE 802.15.4 channel.
  *
- * @retval  kThreadErrorNone         Successfully set the channel.
- * @retval  kThreadErrorInvalidArgs  If @p aChnanel is not in the range [11, 26].
+ * @retval  kThreadError_None         Successfully set the channel.
+ * @retval  kThreadError_InvalidArgs  If @p aChannel is not in the range [11, 26].
  *
  * @sa otGetChannel
  */
 OTAPI ThreadError OTCALL otSetChannel(otInstance *aInstance, uint8_t aChannel);
 
+/**
+ * Set minimal delay timer.
+ *
+ * @param[in]  aInstance           A pointer to an OpenThread instance.
+ * @param[in]  aDelayTimerMinimal  The value of minimal delay timer (in ms).
+ *
+ * @retval  kThreadError_None         Successfully set minimal delay timer.
+ * @retval  kThreadError_InvalidArgs  If @p aDelayTimerMinimal is not valid.
+ *
+ */
+OTAPI ThreadError OTCALL otSetDelayTimerMinimal(otInstance *aInstance, uint32_t aDelayTimerMinimal);
+
+/**
+ * Get minimal delay timer.
+ *
+ * @param[in]  aInstance A pointer to an OpenThread instance.
+ *
+ * @retval the value of minimal delay timer (in ms).
+ *
+ */
+OTAPI uint32_t OTCALL otGetDelayTimerMinimal(otInstance *aInstance);
+
 /**
  * Get the maximum number of children currently allowed.
  *
diff --git a/src/cli/README.md b/src/cli/README.md
index 087c2fd65..4dbdd62a2 100644
--- a/src/cli/README.md
+++ b/src/cli/README.md
@@ -16,6 +16,7 @@ OpenThread test scripts use the CLI to execute test cases.
 * [contextreusedelay](#contextreusedelay)
 * [counter](#counter)
 * [dataset](#dataset)
+* [delaytimermin](#delaytimermin)
 * [discover](#discover)
 * [eidcache](#eidcache)
 * [eui64](#eui64)
@@ -117,6 +118,7 @@ Remove an IEEE 802.15.4 Extended Address from the blacklist.
 > blacklist remove 166e0a0000000002
 Done
 ```
+
 ### channel
 
 Get the IEEE 802.15.4 Channel value.
@@ -664,6 +666,25 @@ Set user specific data for the command.
 Done
 ```
 
+### delaytimermin
+
+Get the minimal delay timer (in seconds).
+
+```bash
+> delaytimermin
+30
+Done
+```
+
+### delaytimermin \<delaytimermin\>
+
+Set the minimal delay timer (in seconds).
+
+```bash
+> delaytimermin 60
+Done
+```
+
 ### discover \[channel\]
 
 Perform an MLE Discovery operation.
diff --git a/src/cli/cli.cpp b/src/cli/cli.cpp
index fdb1e86b8..3e503e02d 100644
--- a/src/cli/cli.cpp
+++ b/src/cli/cli.cpp
@@ -79,6 +79,7 @@ const struct Command Interpreter::sCommands[] =
     { "contextreusedelay", &Interpreter::ProcessContextIdReuseDelay },
     { "counter", &Interpreter::ProcessCounters },
     { "dataset", &Interpreter::ProcessDataset },
+    { "delaytimermin", &Interpreter::ProcessDelayTimerMin},
 #if OPENTHREAD_ENABLE_DIAG
     { "diag", &Interpreter::ProcessDiag },
 #endif
@@ -568,6 +569,29 @@ void Interpreter::ProcessDataset(int argc, char *argv[])
     AppendResult(error);
 }
 
+void Interpreter::ProcessDelayTimerMin(int argc, char *argv[])
+{
+    ThreadError error = kThreadError_None;
+
+    if (argc == 0)
+    {
+        sServer->OutputFormat("%d\r\n", (otGetDelayTimerMinimal(mInstance) / 1000));
+    }
+    else if (argc == 1)
+    {
+        unsigned long value;
+        SuccessOrExit(error = ParseUnsignedLong(argv[0], value));
+        SuccessOrExit(error = otSetDelayTimerMinimal(mInstance, static_cast<uint32_t>(value * 1000)));
+    }
+    else
+    {
+        error = kThreadError_InvalidArgs;
+    }
+
+exit:
+    AppendResult(error);
+}
+
 void Interpreter::ProcessDiscover(int argc, char *argv[])
 {
     ThreadError error = kThreadError_None;
diff --git a/src/cli/cli.hpp b/src/cli/cli.hpp
index f09b6a1f7..cc3528a4f 100644
--- a/src/cli/cli.hpp
+++ b/src/cli/cli.hpp
@@ -153,6 +153,7 @@ private:
     void ProcessContextIdReuseDelay(int argc, char *argv[]);
     void ProcessCounters(int argc, char *argv[]);
     void ProcessDataset(int argc, char *argv[]);
+    void ProcessDelayTimerMin(int argc, char *argv[]);
 #if OPENTHREAD_ENABLE_DIAG
     void ProcessDiag(int argc, char *argv[]);
 #endif  // OPENTHREAD_ENABLE_DIAG
diff --git a/src/core/meshcop/dataset_manager.cpp b/src/core/meshcop/dataset_manager.cpp
index 06b50882d..8c1b328aa 100644
--- a/src/core/meshcop/dataset_manager.cpp
+++ b/src/core/meshcop/dataset_manager.cpp
@@ -506,9 +506,9 @@ ThreadError DatasetManager::Set(Coap::Header &aHeader, Message &aMessage, const
                 {
                     delayTimerTlv->SetDelayTimer(DelayTimerTlv::kDelayTimerDefault);
                 }
-                else if (delayTimerTlv->GetDelayTimer() < DelayTimerTlv::kDelayTimerMinimal)
+                else if (delayTimerTlv->GetDelayTimer() < mNetif.GetLeader().GetDelayTimerMinimal())
                 {
-                    delayTimerTlv->SetDelayTimer(DelayTimerTlv::kDelayTimerMinimal);
+                    delayTimerTlv->SetDelayTimer(mNetif.GetLeader().GetDelayTimerMinimal());
                 }
             }
 
@@ -1118,7 +1118,7 @@ void PendingDatasetBase::ApplyActiveDataset(const Timestamp &aTimestamp, Message
 
     // add delay timer tlv
     delayTimer.Init();
-    delayTimer.SetDelayTimer(DelayTimerTlv::kDelayTimerMinimal);
+    delayTimer.SetDelayTimer(mNetif.GetLeader().GetDelayTimerMinimal());
     mNetwork.Set(delayTimer);
 
     // add pending timestamp tlv
diff --git a/src/core/meshcop/leader.cpp b/src/core/meshcop/leader.cpp
index bd84c7722..fcb3c135e 100644
--- a/src/core/meshcop/leader.cpp
+++ b/src/core/meshcop/leader.cpp
@@ -39,6 +39,7 @@
 #include <common/code_utils.hpp>
 #include <common/logging.hpp>
 #include <meshcop/leader.hpp>
+#include <meshcop/tlvs.hpp>
 #include <platform/random.h>
 #include <thread/thread_netif.hpp>
 #include <thread/thread_tlvs.hpp>
@@ -51,6 +52,7 @@ Leader::Leader(ThreadNetif &aThreadNetif):
     mPetition(OPENTHREAD_URI_LEADER_PETITION, Leader::HandlePetition, this),
     mKeepAlive(OPENTHREAD_URI_LEADER_KEEP_ALIVE, Leader::HandleKeepAlive, this),
     mTimer(aThreadNetif.GetIp6().mTimerScheduler, HandleTimer, this),
+    mDelayTimerMinimal(DelayTimerTlv::kDelayTimerMinimal),
     mSessionId(0xffff),
     mNetif(aThreadNetif)
 {
@@ -254,6 +256,22 @@ exit:
     return error;
 }
 
+ThreadError Leader::SetDelayTimerMinimal(uint32_t aDelayTimerMinimal)
+{
+    ThreadError error = kThreadError_None;
+    VerifyOrExit((aDelayTimerMinimal != 0 && aDelayTimerMinimal < DelayTimerTlv::kDelayTimerDefault),
+                 error = kThreadError_InvalidArgs);
+    mDelayTimerMinimal = aDelayTimerMinimal;
+
+exit:
+    return error;
+}
+
+uint32_t Leader::GetDelayTimerMinimal(void) const
+{
+    return mDelayTimerMinimal;
+}
+
 void Leader::HandleTimer(void *aContext)
 {
     static_cast<Leader *>(aContext)->HandleTimer();
diff --git a/src/core/meshcop/leader_ftd.hpp b/src/core/meshcop/leader_ftd.hpp
index 1c9d3b366..d628b313d 100644
--- a/src/core/meshcop/leader_ftd.hpp
+++ b/src/core/meshcop/leader_ftd.hpp
@@ -81,6 +81,25 @@ public:
      */
     ThreadError SendDatasetChanged(const Ip6::Address &aAddress);
 
+    /**
+     * This method sets minimal delay timer.
+     *
+     * @param[in]  aDelayTimerMinimal The value of minimal delay timer (in ms).
+     *
+     * @retval  kThreadError_None        Successfully set the minimal delay timer.
+     * @retval  kThreadError_InvalidArgs If @p aDelayTimerMinimal is not valid.
+     *
+     */
+    ThreadError SetDelayTimerMinimal(uint32_t aDelayTimerMinimal);
+
+    /**
+     * This method gets minimal delay timer.
+     *
+     * @retval the miniaml delay timer (in ms).
+     *
+     */
+    uint32_t GetDelayTimerMinimal(void) const;
+
 private:
     enum
     {
@@ -110,6 +129,8 @@ private:
     Coap::Resource mKeepAlive;
     Timer mTimer;
 
+    uint32_t mDelayTimerMinimal;
+
     CommissionerIdTlv mCommissionerId;
     uint16_t mSessionId;
     ThreadNetif &mNetif;
diff --git a/src/core/meshcop/leader_mtd.hpp b/src/core/meshcop/leader_mtd.hpp
index 5fa2b3178..9552f2486 100644
--- a/src/core/meshcop/leader_mtd.hpp
+++ b/src/core/meshcop/leader_mtd.hpp
@@ -44,6 +44,8 @@ class Leader
 public:
     Leader(ThreadNetif &) { }
     ThreadError SendDatasetChanged(const Ip6::Address &) { return kThreadError_NotImplemented; }
+    ThreadError SetDelayTimerMinimal(uint32_t) { return kThreadError_NotImplemented; }
+    uint32_t GetDelayTimerMinimal(void) { return 0; }
 };
 
 }  // namespace MeshCoP
diff --git a/src/core/openthread.cpp b/src/core/openthread.cpp
index 6fec3bd06..a637f6c5e 100644
--- a/src/core/openthread.cpp
+++ b/src/core/openthread.cpp
@@ -120,6 +120,16 @@ ThreadError otSetChannel(otInstance *aInstance, uint8_t aChannel)
     return aInstance->mThreadNetif.GetMac().SetChannel(aChannel);
 }
 
+ThreadError otSetDelayTimerMinimal(otInstance *aInstance, uint32_t aDelayTimerMinimal)
+{
+    return aInstance->mThreadNetif.GetLeader().SetDelayTimerMinimal(aDelayTimerMinimal);
+}
+
+uint32_t otGetDelayTimerMinimal(otInstance *aInstance)
+{
+    return aInstance->mThreadNetif.GetLeader().GetDelayTimerMinimal();
+}
+
 uint8_t otGetMaxAllowedChildren(otInstance *aInstance)
 {
     uint8_t aNumChildren;
diff --git a/tools/harness-thci/OpenThread.py b/tools/harness-thci/OpenThread.py
index 73ad4a815..9a6904ea9 100644
--- a/tools/harness-thci/OpenThread.py
+++ b/tools/harness-thci/OpenThread.py
@@ -2534,3 +2534,6 @@ class OpenThread(IThci):
 
     def setMinDelayTimer(self, iSeconds):
         print '%s call setMinDelayTimer' % self.port
+        cmd = 'delaytimermin %s' % iSeconds
+        print cmd
+        return self.__sendCommand(cmd)[0] == 'Done'