diff --git a/cmd/XDC/main.go b/cmd/XDC/main.go
index 6e92867e54..912f412739 100644
--- a/cmd/XDC/main.go
+++ b/cmd/XDC/main.go
@@ -301,7 +301,7 @@ func startNode(ctx *cli.Context, stack *node.Node, cfg XDCConfig) {
 	if err := stack.Service(&ethereum); err != nil {
 		utils.Fatalf("Ethereum service not running: %v", err)
 	}
-	if _, ok := ethereum.Engine().(*XDPoS.XDPoS); ok {
+	if engine, ok := ethereum.Engine().(*XDPoS.XDPoS); ok {
 		go func() {
 			started := false
 			ok := false
@@ -345,6 +345,8 @@ func startNode(ctx *cli.Context, stack *node.Node, cfg XDCConfig) {
 			defer close(core.CheckpointCh)
 			for range core.CheckpointCh {
 				log.Info("Checkpoint!!! It's time to reconcile node's state...")
+				log.Info("Update consensus parameters")
+				engine.UpdateParams()
 				if common.IsTestnet {
 					ok, err = ethereum.ValidateMasternodeTestnet()
 					if err != nil {
diff --git a/common/countdown/countdown.go b/common/countdown/countdown.go
index b26dcd669e..cffba13bf0 100644
--- a/common/countdown/countdown.go
+++ b/common/countdown/countdown.go
@@ -34,6 +34,10 @@ func (t *CountdownTimer) StopTimer() {
 	<-q
 }
 
+func (t *CountdownTimer) SetTimeoutDuration(duration time.Duration) {
+	t.timeoutDuration = duration
+}
+
 // Reset will start the countdown timer if it's already stopped, or simply reset the countdown time back to the defual `duration`
 func (t *CountdownTimer) Reset(i interface{}) {
 	if !t.isInitilised() {
diff --git a/consensus/XDPoS/XDPoS.go b/consensus/XDPoS/XDPoS.go
index 97b99bdb3f..f6b7b5d615 100644
--- a/consensus/XDPoS/XDPoS.go
+++ b/consensus/XDPoS/XDPoS.go
@@ -87,7 +87,11 @@ func New(config *params.XDPoSConfig, db ethdb.Database) *XDPoS {
 
 	// For testing and testing project, default to mainnet config
 	if config.V2 == nil {
-		config.V2 = params.XDPoSV2Config
+		config.V2 = &params.V2{
+			FirstSwitchBlock: params.MainnetV2Configs[0].SwitchBlock,
+			CurrentConfig:    params.MainnetV2Configs[0],
+			AllConfigs:       params.MainnetV2Configs,
+		}
 	}
 
 	log.Info("xdc config loading", "config", config)
@@ -140,6 +144,11 @@ func NewFaker(db ethdb.Database, chainConfig *params.ChainConfig) *XDPoS {
 	return fakeEngine
 }
 
+// Reset parameters after checkpoint due to config may change
+func (x *XDPoS) UpdateParams() {
+	x.EngineV2.UpdateParams()
+}
+
 func (x *XDPoS) Initial(chain consensus.ChainReader, header *types.Header) error {
 	switch x.config.BlockConsensusVersion(header.Number, header.Extra, ExtraFieldCheck) {
 	case params.ConsensusEngineVersion2:
diff --git a/consensus/XDPoS/engines/engine_v2/engine.go b/consensus/XDPoS/engines/engine_v2/engine.go
index 4b0c0b3c6b..d8bc577f52 100644
--- a/consensus/XDPoS/engines/engine_v2/engine.go
+++ b/consensus/XDPoS/engines/engine_v2/engine.go
@@ -66,7 +66,7 @@ type XDPoS_v2 struct {
 
 func New(config *params.XDPoSConfig, db ethdb.Database, waitPeriodCh chan int) *XDPoS_v2 {
 	// Setup timeoutTimer
-	duration := time.Duration(config.V2.TimeoutPeriod) * time.Second
+	duration := time.Duration(config.V2.CurrentConfig.TimeoutPeriod) * time.Second
 	timeoutTimer := countdown.NewCountDown(duration)
 
 	snapshots, _ := lru.NewARC(utils.InmemorySnapshots)
@@ -74,8 +74,8 @@ func New(config *params.XDPoSConfig, db ethdb.Database, waitPeriodCh chan int) *
 	epochSwitches, _ := lru.NewARC(int(utils.InmemoryEpochs))
 	verifiedHeaders, _ := lru.NewARC(utils.InmemorySnapshots)
 
-	timeoutPool := utils.NewPool(config.V2.CertThreshold)
-	votePool := utils.NewPool(config.V2.CertThreshold)
+	timeoutPool := utils.NewPool()
+	votePool := utils.NewPool()
 	engine := &XDPoS_v2{
 		config:       config,
 		db:           db,
@@ -116,6 +116,7 @@ func New(config *params.XDPoSConfig, db ethdb.Database, waitPeriodCh chan int) *
 	timeoutTimer.OnTimeoutFn = engine.OnCountdownTimeout
 
 	engine.periodicJob()
+	config.BuildConfigIndex()
 
 	return engine
 }
@@ -129,6 +130,18 @@ sigHash returns the hash which is used as input for the delegated-proof-of-stake
 signing. It is the hash of the entire header apart from the 65 byte signature
 contained at the end of the extra data.
 */
+
+func (x *XDPoS_v2) UpdateParams() {
+	// Setup timeoutTimer
+	duration := time.Duration(x.config.V2.CurrentConfig.TimeoutPeriod) * time.Second
+	x.timeoutWorker.SetTimeoutDuration(duration)
+
+	// avoid deadlock
+	go func() {
+		x.waitPeriodCh <- x.config.V2.CurrentConfig.WaitPeriod
+	}()
+}
+
 func (x *XDPoS_v2) SignHash(header *types.Header) (hash common.Hash) {
 	return sigHash(header)
 }
@@ -150,7 +163,7 @@ func (x *XDPoS_v2) initial(chain consensus.ChainReader, header *types.Header) er
 	var quorumCert *types.QuorumCert
 	var err error
 
-	if header.Number.Int64() == x.config.V2.SwitchBlock.Int64() {
+	if header.Number.Int64() == x.config.V2.FirstSwitchBlock.Int64() {
 		log.Info("[initial] highest QC for consensus v2 first block")
 		blockInfo := &types.BlockInfo{
 			Hash:   header.Hash(),
@@ -180,13 +193,13 @@ func (x *XDPoS_v2) initial(chain consensus.ChainReader, header *types.Header) er
 	}
 
 	// Initial first v2 snapshot
-	lastGapNum := x.config.V2.SwitchBlock.Uint64() - x.config.Gap
+	lastGapNum := x.config.V2.FirstSwitchBlock.Uint64() - x.config.Gap
 	lastGapHeader := chain.GetHeaderByNumber(lastGapNum)
 
 	snap, _ := loadSnapshot(x.db, lastGapHeader.Hash())
 
 	if snap == nil {
-		checkpointHeader := chain.GetHeaderByNumber(x.config.V2.SwitchBlock.Uint64())
+		checkpointHeader := chain.GetHeaderByNumber(x.config.V2.FirstSwitchBlock.Uint64())
 
 		log.Info("[initial] init first snapshot")
 		_, _, masternodes, err := x.getExtraFields(checkpointHeader)
@@ -204,10 +217,10 @@ func (x *XDPoS_v2) initial(chain consensus.ChainReader, header *types.Header) er
 	}
 
 	// Initial timeout
-	log.Info("[initial] miner wait period", "period", x.config.V2.WaitPeriod)
+	log.Info("[initial] miner wait period", "period", x.config.V2.CurrentConfig.WaitPeriod)
 	// avoid deadlock
 	go func() {
-		x.waitPeriodCh <- x.config.V2.WaitPeriod
+		x.waitPeriodCh <- x.config.V2.CurrentConfig.WaitPeriod
 	}()
 
 	// Kick-off the countdown timer
@@ -233,8 +246,8 @@ func (x *XDPoS_v2) YourTurn(chain consensus.ChainReader, parent *types.Header, s
 	}
 
 	waitedTime := time.Now().Unix() - parent.Time.Int64()
-	if waitedTime < int64(x.config.V2.MinePeriod) {
-		log.Trace("[YourTurn] wait after mine period", "minePeriod", x.config.V2.MinePeriod, "waitedTime", waitedTime)
+	if waitedTime < int64(x.config.V2.CurrentConfig.MinePeriod) {
+		log.Trace("[YourTurn] wait after mine period", "minePeriod", x.config.V2.CurrentConfig.MinePeriod, "waitedTime", waitedTime)
 		return false, nil
 	}
 
@@ -705,7 +718,7 @@ func (x *XDPoS_v2) VerifyBlockInfo(blockChainReader consensus.ChainReader, block
 	}
 
 	// Switch block is a v1 block, there is no valid extra to decode, nor its round
-	if blockInfo.Number.Cmp(x.config.V2.SwitchBlock) == 0 {
+	if blockInfo.Number.Cmp(x.config.V2.FirstSwitchBlock) == 0 {
 		if blockInfo.Round != 0 {
 			log.Error("[VerifyBlockInfo] Switch block round is not 0", "BlockInfoHash", blockInfo.Hash.Hex(), "BlockInfoNum", blockInfo.Number, "BlockInfoRound", blockInfo.Round, "blockHeaderNum", blockHeader.Number)
 			return fmt.Errorf("[VerifyBlockInfo] switch block round have to be 0")
@@ -753,7 +766,7 @@ func (x *XDPoS_v2) verifyQC(blockChainReader consensus.ChainReader, quorumCert *
 	if quorumCert == nil {
 		log.Warn("[verifyQC] QC is Nil")
 		return utils.ErrInvalidQC
-	} else if (quorumCert.ProposedBlockInfo.Number.Uint64() > x.config.V2.SwitchBlock.Uint64()) && (signatures == nil || (len(signatures) < x.config.V2.CertThreshold)) {
+	} else if (quorumCert.ProposedBlockInfo.Number.Uint64() > x.config.V2.FirstSwitchBlock.Uint64()) && (signatures == nil || (len(signatures) < x.config.V2.CurrentConfig.CertThreshold)) {
 		//First V2 Block QC, QC Signatures is initial nil
 		log.Warn("[verifyHeader] Invalid QC Signature is nil or empty", "QC", quorumCert, "QCNumber", quorumCert.ProposedBlockInfo.Number, "Signatures len", len(signatures))
 		return utils.ErrInvalidQC
@@ -813,7 +826,7 @@ func (x *XDPoS_v2) processQC(blockChainReader consensus.ChainReader, incomingQuo
 		log.Error("[processQC] Block not found using the QC", "quorumCert.ProposedBlockInfo.Hash", incomingQuorumCert.ProposedBlockInfo.Hash, "incomingQuorumCert.ProposedBlockInfo.Number", incomingQuorumCert.ProposedBlockInfo.Number)
 		return fmt.Errorf("block not found, number: %v, hash: %v", incomingQuorumCert.ProposedBlockInfo.Number, incomingQuorumCert.ProposedBlockInfo.Hash)
 	}
-	if proposedBlockHeader.Number.Cmp(x.config.V2.SwitchBlock) > 0 {
+	if proposedBlockHeader.Number.Cmp(x.config.V2.FirstSwitchBlock) > 0 {
 		// Extra field contain parent information
 		proposedBlockQuorumCert, round, _, err := x.getExtraFields(proposedBlockHeader)
 		if err != nil {
@@ -869,7 +882,7 @@ func (x *XDPoS_v2) getSyncInfo() *types.SyncInfo {
 //Find parent and grandparent, check round number, if so, commit grandparent(grandGrandParent of currentBlock)
 func (x *XDPoS_v2) commitBlocks(blockChainReader consensus.ChainReader, proposedBlockHeader *types.Header, proposedBlockRound *types.Round, incomingQc *types.QuorumCert) (bool, error) {
 	// XDPoS v1.0 switch to v2.0, skip commit
-	if big.NewInt(0).Sub(proposedBlockHeader.Number, big.NewInt(2)).Cmp(x.config.V2.SwitchBlock) <= 0 {
+	if big.NewInt(0).Sub(proposedBlockHeader.Number, big.NewInt(2)).Cmp(x.config.V2.FirstSwitchBlock) <= 0 {
 		return false, nil
 	}
 	// Find the last two parent block and check their rounds are the continuous
@@ -946,7 +959,7 @@ func (x *XDPoS_v2) calcMasternodes(chain consensus.ChainReader, blockNum *big.In
 	}
 	candidates := snap.NextEpochMasterNodes
 
-	if blockNum.Uint64() == x.config.V2.SwitchBlock.Uint64()+1 {
+	if blockNum.Uint64() == x.config.V2.FirstSwitchBlock.Uint64()+1 {
 		log.Info("[calcMasternodes] examing first v2 block")
 		return candidates, []common.Address{}, nil
 	}
diff --git a/consensus/XDPoS/engines/engine_v2/epochSwitch.go b/consensus/XDPoS/engines/engine_v2/epochSwitch.go
index 66feda0617..e94dddd0a2 100644
--- a/consensus/XDPoS/engines/engine_v2/epochSwitch.go
+++ b/consensus/XDPoS/engines/engine_v2/epochSwitch.go
@@ -82,9 +82,9 @@ func (x *XDPoS_v2) getEpochSwitchInfo(chain consensus.ChainReader, header *types
 
 // IsEpochSwitchAtRound() is used by miner to check whether it mines a block in the same epoch with parent
 func (x *XDPoS_v2) isEpochSwitchAtRound(round types.Round, parentHeader *types.Header) (bool, uint64, error) {
-	epochNum := x.config.V2.SwitchBlock.Uint64()/x.config.Epoch + uint64(round)/x.config.Epoch
+	epochNum := x.config.V2.FirstSwitchBlock.Uint64()/x.config.Epoch + uint64(round)/x.config.Epoch
 	// if parent is last v1 block and this is first v2 block, this is treated as epoch switch
-	if parentHeader.Number.Cmp(x.config.V2.SwitchBlock) == 0 {
+	if parentHeader.Number.Cmp(x.config.V2.FirstSwitchBlock) == 0 {
 		return true, epochNum, nil
 	}
 
@@ -111,13 +111,13 @@ func (x *XDPoS_v2) GetCurrentEpochSwitchBlock(chain consensus.ChainReader, block
 	}
 
 	currentCheckpointNumber := epochSwitchInfo.EpochSwitchBlockInfo.Number.Uint64()
-	epochNum := x.config.V2.SwitchBlock.Uint64()/x.config.Epoch + uint64(epochSwitchInfo.EpochSwitchBlockInfo.Round)/x.config.Epoch
+	epochNum := x.config.V2.FirstSwitchBlock.Uint64()/x.config.Epoch + uint64(epochSwitchInfo.EpochSwitchBlockInfo.Round)/x.config.Epoch
 	return currentCheckpointNumber, epochNum, nil
 }
 
 func (x *XDPoS_v2) IsEpochSwitch(header *types.Header) (bool, uint64, error) {
 	// Return true directly if we are examing the last v1 block. This could happen if the calling function is examing parent block
-	if header.Number.Cmp(x.config.V2.SwitchBlock) == 0 {
+	if header.Number.Cmp(x.config.V2.FirstSwitchBlock) == 0 {
 		log.Info("[IsEpochSwitch] examing last v1 block")
 		return true, header.Number.Uint64() / x.config.Epoch, nil
 	}
@@ -129,9 +129,9 @@ func (x *XDPoS_v2) IsEpochSwitch(header *types.Header) (bool, uint64, error) {
 	}
 	parentRound := quorumCert.ProposedBlockInfo.Round
 	epochStartRound := round - round%types.Round(x.config.Epoch)
-	epochNum := x.config.V2.SwitchBlock.Uint64()/x.config.Epoch + uint64(round)/x.config.Epoch
+	epochNum := x.config.V2.FirstSwitchBlock.Uint64()/x.config.Epoch + uint64(round)/x.config.Epoch
 	// if parent is last v1 block and this is first v2 block, this is treated as epoch switch
-	if quorumCert.ProposedBlockInfo.Number.Cmp(x.config.V2.SwitchBlock) == 0 {
+	if quorumCert.ProposedBlockInfo.Number.Cmp(x.config.V2.FirstSwitchBlock) == 0 {
 		log.Info("[IsEpochSwitch] true, parent equals V2.SwitchBlock", "round", round, "number", header.Number.Uint64(), "hash", header.Hash())
 		return true, epochNum, nil
 	}
diff --git a/consensus/XDPoS/engines/engine_v2/timeout.go b/consensus/XDPoS/engines/engine_v2/timeout.go
index 07194701c3..63214c0893 100644
--- a/consensus/XDPoS/engines/engine_v2/timeout.go
+++ b/consensus/XDPoS/engines/engine_v2/timeout.go
@@ -24,10 +24,11 @@ func (x *XDPoS_v2) timeoutHandler(blockChainReader consensus.ChainReader, timeou
 		}
 	}
 	// Collect timeout, generate TC
-	isThresholdReached, numberOfTimeoutsInPool, pooledTimeouts := x.timeoutPool.Add(timeout)
+	numberOfTimeoutsInPool, pooledTimeouts := x.timeoutPool.Add(timeout)
 	log.Debug("[timeoutHandler] collect timeout", "number", numberOfTimeoutsInPool)
 
 	// Threshold reached
+	isThresholdReached := numberOfTimeoutsInPool >= x.config.V2.CurrentConfig.CertThreshold
 	if isThresholdReached {
 		log.Info(fmt.Sprintf("Timeout pool threashold reached: %v, number of items in the pool: %v", isThresholdReached, numberOfTimeoutsInPool))
 		err := x.onTimeoutPoolThresholdReached(blockChainReader, pooledTimeouts, timeout, timeout.GapNumber)
@@ -94,7 +95,7 @@ func (x *XDPoS_v2) verifyTC(chain consensus.ChainReader, timeoutCert *types.Time
 	if timeoutCert == nil {
 		log.Warn("[verifyTC] TC is Nil")
 		return utils.ErrInvalidTC
-	} else if timeoutCert.Signatures == nil || (len(timeoutCert.Signatures) < x.config.V2.CertThreshold) {
+	} else if timeoutCert.Signatures == nil || (len(timeoutCert.Signatures) < x.config.V2.CurrentConfig.CertThreshold) {
 		log.Warn("[verifyTC] Invalid TC Signature is nil or empty", "timeoutCert.Round", timeoutCert.Round, "timeoutCert.GapNumber", timeoutCert.GapNumber, "Signatures len", len(timeoutCert.Signatures))
 		return utils.ErrInvalidTC
 	}
@@ -220,7 +221,7 @@ func (x *XDPoS_v2) OnCountdownTimeout(time time.Time, chain interface{}) error {
 	}
 
 	x.timeoutCount++
-	if x.timeoutCount%x.config.V2.TimeoutSyncThreshold == 0 {
+	if x.timeoutCount%x.config.V2.CurrentConfig.TimeoutSyncThreshold == 0 {
 		log.Warn("[OnCountdownTimeout] timeout sync threadhold reached, send syncInfo message")
 		syncInfo := x.getSyncInfo()
 		x.broadcastToBftChannel(syncInfo)
diff --git a/consensus/XDPoS/engines/engine_v2/utils.go b/consensus/XDPoS/engines/engine_v2/utils.go
index 8830bfa21d..90bdd1a71c 100644
--- a/consensus/XDPoS/engines/engine_v2/utils.go
+++ b/consensus/XDPoS/engines/engine_v2/utils.go
@@ -119,7 +119,7 @@ func (x *XDPoS_v2) verifyMsgSignature(signedHashToBeVerified common.Hash, signat
 		}
 	}
 
-	return false, signerAddress, fmt.Errorf("Masternodes list does not contain signer address, Signer address: %v", signerAddress.Hex())
+	return false, signerAddress, nil
 }
 
 func (x *XDPoS_v2) getExtraFields(header *types.Header) (*types.QuorumCert, types.Round, []common.Address, error) {
@@ -127,7 +127,7 @@ func (x *XDPoS_v2) getExtraFields(header *types.Header) (*types.QuorumCert, type
 	var masternodes []common.Address
 
 	// last v1 block
-	if header.Number.Cmp(x.config.V2.SwitchBlock) == 0 {
+	if header.Number.Cmp(x.config.V2.FirstSwitchBlock) == 0 {
 		masternodes = decodeMasternodesFromHeaderExtra(header)
 		return nil, types.Round(0), masternodes, nil
 	}
diff --git a/consensus/XDPoS/engines/engine_v2/verifyHeader.go b/consensus/XDPoS/engines/engine_v2/verifyHeader.go
index f727e19808..d72bbb013b 100644
--- a/consensus/XDPoS/engines/engine_v2/verifyHeader.go
+++ b/consensus/XDPoS/engines/engine_v2/verifyHeader.go
@@ -58,7 +58,7 @@ func (x *XDPoS_v2) verifyHeader(chain consensus.ChainReader, header *types.Heade
 	if parent == nil || parent.Number.Uint64() != number-1 || parent.Hash() != header.ParentHash {
 		return consensus.ErrUnknownAncestor
 	}
-	if parent.Number.Uint64() > x.config.V2.SwitchBlock.Uint64() && parent.Time.Uint64()+uint64(x.config.V2.MinePeriod) > header.Time.Uint64() {
+	if parent.Number.Uint64() > x.config.V2.FirstSwitchBlock.Uint64() && parent.Time.Uint64()+uint64(x.config.V2.CurrentConfig.MinePeriod) > header.Time.Uint64() {
 		return utils.ErrInvalidTimestamp
 	}
 
diff --git a/consensus/XDPoS/engines/engine_v2/vote.go b/consensus/XDPoS/engines/engine_v2/vote.go
index ad90a22ac6..98ae838ed6 100644
--- a/consensus/XDPoS/engines/engine_v2/vote.go
+++ b/consensus/XDPoS/engines/engine_v2/vote.go
@@ -70,10 +70,12 @@ func (x *XDPoS_v2) voteHandler(chain consensus.ChainReader, voteMsg *types.Vote)
 	}
 
 	// Collect vote
-	thresholdReached, numberOfVotesInPool, pooledVotes := x.votePool.Add(voteMsg)
+	numberOfVotesInPool, pooledVotes := x.votePool.Add(voteMsg)
 	log.Debug("[voteHandler] collect votes", "number", numberOfVotesInPool)
 	go x.ForensicsProcessor.DetectEquivocationInVotePool(voteMsg, x.votePool)
 	go x.ForensicsProcessor.ProcessVoteEquivocation(chain, x, voteMsg)
+
+	thresholdReached := numberOfVotesInPool >= x.config.V2.CurrentConfig.CertThreshold
 	if thresholdReached {
 		log.Info(fmt.Sprintf("[voteHandler] Vote pool threashold reached: %v, number of items in the pool: %v", thresholdReached, numberOfVotesInPool))
 
@@ -120,8 +122,10 @@ func (x *XDPoS_v2) onVotePoolThresholdReached(chain consensus.ChainReader, poole
 				ProposedBlockInfo: v.ProposedBlockInfo,
 				GapNumber:         v.GapNumber,
 			}), v.Signature, masternodes)
-			if !verified || err != nil {
-				log.Warn("[onVotePoolThresholdReached] Skip not verified vote signatures when building QC", "Error", err.Error(), "verified", verified)
+			if err != nil {
+				log.Warn("[onVotePoolThresholdReached] Skip not verified vote signatures when building QC", "Error", err.Error())
+			} else if !verified {
+				log.Warn("[onVotePoolThresholdReached] Skip not verified vote signatures when building QC", "verified", verified)
 			} else {
 				signatureSlice[i] = v.Signature
 			}
@@ -141,7 +145,7 @@ func (x *XDPoS_v2) onVotePoolThresholdReached(chain consensus.ChainReader, poole
 	}
 
 	// Skip and wait for the next vote to process again if valid votes is less than what we required
-	if len(validSignatureSlice) < x.config.V2.CertThreshold {
+	if len(validSignatureSlice) < x.config.V2.CurrentConfig.CertThreshold {
 		log.Warn("[onVotePoolThresholdReached] Not enough valid signatures to generate QC", "VotesSignaturesAfterFilter", validSignatureSlice, "NumberOfValidVotes", len(validSignatureSlice), "NumberOfVotes", len(pooledVotes))
 		return nil
 	}
diff --git a/consensus/XDPoS/utils/pool.go b/consensus/XDPoS/utils/pool.go
index 98eef6a4e7..91b3e21653 100644
--- a/consensus/XDPoS/utils/pool.go
+++ b/consensus/XDPoS/utils/pool.go
@@ -11,20 +11,18 @@ type PoolObj interface {
 	PoolKey() string
 }
 type Pool struct {
-	objList   map[string]map[common.Hash]PoolObj
-	threshold int
-	lock      sync.RWMutex // Protects the pool fields
+	objList map[string]map[common.Hash]PoolObj
+	lock    sync.RWMutex // Protects the pool fields
 }
 
-func NewPool(threshold int) *Pool {
+func NewPool() *Pool {
 	return &Pool{
-		objList:   make(map[string]map[common.Hash]PoolObj),
-		threshold: threshold,
+		objList: make(map[string]map[common.Hash]PoolObj),
 	}
 }
 
 // return true if it has reached threshold
-func (p *Pool) Add(obj PoolObj) (bool, int, map[common.Hash]PoolObj) {
+func (p *Pool) Add(obj PoolObj) (int, map[common.Hash]PoolObj) {
 	p.lock.Lock()
 	defer p.lock.Unlock()
 	poolKey := obj.PoolKey()
@@ -35,10 +33,7 @@ func (p *Pool) Add(obj PoolObj) (bool, int, map[common.Hash]PoolObj) {
 	}
 	objListKeyed[obj.Hash()] = obj
 	numOfItems := len(objListKeyed)
-	if numOfItems >= p.threshold {
-		return true, numOfItems, objListKeyed
-	}
-	return false, numOfItems, objListKeyed
+	return numOfItems, objListKeyed
 }
 
 func (p *Pool) Size(obj PoolObj) int {
@@ -85,13 +80,6 @@ func (p *Pool) Clear() {
 	p.objList = make(map[string]map[common.Hash]PoolObj)
 }
 
-func (p *Pool) SetThreshold(t int) {
-	p.lock.Lock()
-	defer p.lock.Unlock()
-
-	p.threshold = t
-}
-
 func (p *Pool) GetObjsByKey(poolKey string) []PoolObj {
 	p.lock.Lock()
 	defer p.lock.Unlock()
diff --git a/consensus/XDPoS/utils/pool_test.go b/consensus/XDPoS/utils/pool_test.go
index 6a94afa3e8..39d3d37810 100644
--- a/consensus/XDPoS/utils/pool_test.go
+++ b/consensus/XDPoS/utils/pool_test.go
@@ -10,55 +10,50 @@ import (
 func TestPoolAdd(t *testing.T) {
 	assert := assert.New(t)
 
-	pool := NewPool(2) // 2 is the cert threshold
+	pool := NewPool()
 	timeout1 := types.Timeout{Round: 1, Signature: []byte{1}}
 	timeout2 := types.Timeout{Round: 1, Signature: []byte{2}}
 	timeout3 := types.Timeout{Round: 1, Signature: []byte{3}}
 	timeout4 := types.Timeout{Round: 1, Signature: []byte{4}}
-	thresholdReached, numOfItems, pooledTimeouts := pool.Add(&timeout1)
+	numOfItems, pooledTimeouts := pool.Add(&timeout1)
 	assert.NotNil(pooledTimeouts)
 	assert.Equal(1, numOfItems)
-	assert.False(thresholdReached)
-	thresholdReached, numOfItems, pooledTimeouts = pool.Add(&timeout1)
+	numOfItems, pooledTimeouts = pool.Add(&timeout1)
 	assert.NotNil(pooledTimeouts)
-	assert.False(thresholdReached)
 	// Duplicates should not be added
 	assert.Equal(1, numOfItems)
 
 	// Should add the one that is not a duplicates
-	thresholdReached, numOfItems, pooledTimeouts = pool.Add(&timeout2)
-	assert.True(thresholdReached)
+	numOfItems, pooledTimeouts = pool.Add(&timeout2)
+
 	assert.NotNil(pooledTimeouts)
 	assert.Equal(2, numOfItems)
 
 	// Try to add one more to the same round, it should also trigger threshold
-	thresholdReached, numOfItems, pooledTimeouts = pool.Add(&timeout3)
-	assert.True(thresholdReached)
+	numOfItems, pooledTimeouts = pool.Add(&timeout3)
 	assert.NotNil(pooledTimeouts)
 	assert.Equal(3, numOfItems)
 
 	// Only after manually clearned the pool at its objKey, we shall not have any value for this particular key
 	pool.ClearPoolKeyByObj(&timeout3)
-	thresholdReached, numOfItems, pooledTimeouts = pool.Add(&timeout4)
-	assert.False(thresholdReached)
+	numOfItems, pooledTimeouts = pool.Add(&timeout4)
+
 	assert.NotNil(pooledTimeouts)
 	assert.Equal(1, numOfItems)
 
-	pool = NewPool(3) // 3 is the cert size
-	thresholdReached, numOfItems, pooledTimeouts = pool.Add(&timeout1)
-	assert.False(thresholdReached)
+	pool = NewPool()
+	numOfItems, pooledTimeouts = pool.Add(&timeout1)
 	assert.NotNil(pooledTimeouts)
 	assert.Equal(1, numOfItems)
 
-	thresholdReached, numOfItems, pooledTimeouts = pool.Add(&timeout2)
-	assert.False(thresholdReached)
+	numOfItems, pooledTimeouts = pool.Add(&timeout2)
+
 	assert.Equal(2, numOfItems)
 	assert.NotNil(pooledTimeouts)
 	pool.Clear()
 
 	// Pool has been cleared. Start from 0 again
-	thresholdReached, numOfItems, pooledTimeouts = pool.Add(&timeout3)
-	assert.False(thresholdReached)
+	numOfItems, pooledTimeouts = pool.Add(&timeout3)
 	assert.Equal(1, numOfItems)
 	assert.NotNil(pooledTimeouts)
 }
diff --git a/consensus/tests/engine_v1_tests/helper.go b/consensus/tests/engine_v1_tests/helper.go
index 3b777e487b..3d66302650 100644
--- a/consensus/tests/engine_v1_tests/helper.go
+++ b/consensus/tests/engine_v1_tests/helper.go
@@ -302,7 +302,7 @@ func CreateBlock(blockchain *BlockChain, chainConfig *params.ChainConfig, starti
 	}
 
 	// Inject the hardcoded master node list for the last v1 epoch block and all v1 epoch switch blocks (excluding genesis)
-	if big.NewInt(int64(blockNumber)).Cmp(chainConfig.XDPoS.V2.SwitchBlock) == 0 || blockNumber%int(chainConfig.XDPoS.Epoch) == 0 {
+	if big.NewInt(int64(blockNumber)).Cmp(chainConfig.XDPoS.V2.FirstSwitchBlock) == 0 || blockNumber%int(chainConfig.XDPoS.Epoch) == 0 {
 		// reset extra
 		header.Extra = []byte{}
 		if len(header.Extra) < utils.ExtraVanity {
diff --git a/consensus/tests/engine_v2_tests/adaptor_test.go b/consensus/tests/engine_v2_tests/adaptor_test.go
index 6eb2ff65e1..36fae6922a 100644
--- a/consensus/tests/engine_v2_tests/adaptor_test.go
+++ b/consensus/tests/engine_v2_tests/adaptor_test.go
@@ -66,7 +66,7 @@ func TestAdaptorGetMasternodesFromCheckpointHeader(t *testing.T) {
 	headerV1.Extra = common.Hex2Bytes("d7830100018358444388676f312e31352e38856c696e757800000000000000000278c350152e15fa6ffc712a5a73d704ce73e2e103d9e17ae3ff2c6712e44e25b09ac5ee91f6c9ff065551f0dcac6f00cae11192d462db709be3758ccef312ee5eea8d7bad5374c6a652150515d744508b61c1a4deb4e4e7bf057e4e3824c11fd2569bcb77a52905cda63b5a58507910bed335e4c9d87ae0ecdfafd400")
 	masternodesV1 := adaptor.GetMasternodesFromCheckpointHeader(headerV1)
 	headerV2 := currentBlock.Header()
-	headerV2.Number.Add(blockchain.Config().XDPoS.V2.SwitchBlock, big.NewInt(1))
+	headerV2.Number.Add(blockchain.Config().XDPoS.V2.FirstSwitchBlock, big.NewInt(1))
 	headerV2.Validators = common.Hex2Bytes("0278c350152e15fa6ffc712a5a73d704ce73e2e103d9e17ae3ff2c6712e44e25b09ac5ee91f6c9ff065551f0dcac6f00cae11192d462db709be3758c")
 	headerV2.Extra = []byte{2}
 	masternodesV2 := adaptor.GetMasternodesFromCheckpointHeader(headerV2)
@@ -91,12 +91,12 @@ func TestAdaptorIsEpochSwitch(t *testing.T) {
 	parentBlockInfo := &types.BlockInfo{
 		Hash:   header.ParentHash,
 		Round:  types.Round(0),
-		Number: big.NewInt(0).Set(blockchain.Config().XDPoS.V2.SwitchBlock),
+		Number: big.NewInt(0).Set(blockchain.Config().XDPoS.V2.FirstSwitchBlock),
 	}
 	quorumCert := &types.QuorumCert{
 		ProposedBlockInfo: parentBlockInfo,
 		Signatures:        nil,
-		GapNumber:         blockchain.Config().XDPoS.V2.SwitchBlock.Uint64() - blockchain.Config().XDPoS.Gap,
+		GapNumber:         blockchain.Config().XDPoS.V2.FirstSwitchBlock.Uint64() - blockchain.Config().XDPoS.Gap,
 	}
 	extra := types.ExtraFields_v2{
 		Round:      1,
@@ -105,19 +105,19 @@ func TestAdaptorIsEpochSwitch(t *testing.T) {
 	extraBytes, err := extra.EncodeToBytes()
 	assert.Nil(t, err)
 	header.Extra = extraBytes
-	header.Number.Add(blockchain.Config().XDPoS.V2.SwitchBlock, big.NewInt(1))
+	header.Number.Add(blockchain.Config().XDPoS.V2.FirstSwitchBlock, big.NewInt(1))
 	isEpochSwitchBlock, _, err = adaptor.IsEpochSwitch(header)
 	assert.Nil(t, err)
 	assert.True(t, isEpochSwitchBlock, "header should be epoch switch", header)
 	parentBlockInfo = &types.BlockInfo{
 		Hash:   header.ParentHash,
 		Round:  types.Round(1),
-		Number: big.NewInt(0).Add(blockchain.Config().XDPoS.V2.SwitchBlock, big.NewInt(1)),
+		Number: big.NewInt(0).Add(blockchain.Config().XDPoS.V2.FirstSwitchBlock, big.NewInt(1)),
 	}
 	quorumCert = &types.QuorumCert{
 		ProposedBlockInfo: parentBlockInfo,
 		Signatures:        nil,
-		GapNumber:         blockchain.Config().XDPoS.V2.SwitchBlock.Uint64() - blockchain.Config().XDPoS.Gap,
+		GapNumber:         blockchain.Config().XDPoS.V2.FirstSwitchBlock.Uint64() - blockchain.Config().XDPoS.Gap,
 	}
 	extra = types.ExtraFields_v2{
 		Round:      2,
@@ -126,19 +126,19 @@ func TestAdaptorIsEpochSwitch(t *testing.T) {
 	extraBytes, err = extra.EncodeToBytes()
 	assert.Nil(t, err)
 	header.Extra = extraBytes
-	header.Number.Add(blockchain.Config().XDPoS.V2.SwitchBlock, big.NewInt(2))
+	header.Number.Add(blockchain.Config().XDPoS.V2.FirstSwitchBlock, big.NewInt(2))
 	isEpochSwitchBlock, _, err = adaptor.IsEpochSwitch(header)
 	assert.Nil(t, err)
 	assert.False(t, isEpochSwitchBlock, "header should not be epoch switch", header)
 	parentBlockInfo = &types.BlockInfo{
 		Hash:   header.ParentHash,
 		Round:  types.Round(blockchain.Config().XDPoS.Epoch) - 1,
-		Number: big.NewInt(0).Add(blockchain.Config().XDPoS.V2.SwitchBlock, big.NewInt(100)),
+		Number: big.NewInt(0).Add(blockchain.Config().XDPoS.V2.FirstSwitchBlock, big.NewInt(100)),
 	}
 	quorumCert = &types.QuorumCert{
 		ProposedBlockInfo: parentBlockInfo,
 		Signatures:        nil,
-		GapNumber:         blockchain.Config().XDPoS.V2.SwitchBlock.Uint64() - blockchain.Config().XDPoS.Gap,
+		GapNumber:         blockchain.Config().XDPoS.V2.FirstSwitchBlock.Uint64() - blockchain.Config().XDPoS.Gap,
 	}
 	extra = types.ExtraFields_v2{
 		Round:      types.Round(blockchain.Config().XDPoS.Epoch) + 1,
@@ -147,19 +147,19 @@ func TestAdaptorIsEpochSwitch(t *testing.T) {
 	extraBytes, err = extra.EncodeToBytes()
 	assert.Nil(t, err)
 	header.Extra = extraBytes
-	header.Number.Add(blockchain.Config().XDPoS.V2.SwitchBlock, big.NewInt(101))
+	header.Number.Add(blockchain.Config().XDPoS.V2.FirstSwitchBlock, big.NewInt(101))
 	isEpochSwitchBlock, _, err = adaptor.IsEpochSwitch(header)
 	assert.Nil(t, err)
 	assert.True(t, isEpochSwitchBlock, "header should be epoch switch", header)
 	parentBlockInfo = &types.BlockInfo{
 		Hash:   header.ParentHash,
 		Round:  types.Round(blockchain.Config().XDPoS.Epoch) + 1,
-		Number: big.NewInt(0).Add(blockchain.Config().XDPoS.V2.SwitchBlock, big.NewInt(100)),
+		Number: big.NewInt(0).Add(blockchain.Config().XDPoS.V2.FirstSwitchBlock, big.NewInt(100)),
 	}
 	quorumCert = &types.QuorumCert{
 		ProposedBlockInfo: parentBlockInfo,
 		Signatures:        nil,
-		GapNumber:         blockchain.Config().XDPoS.V2.SwitchBlock.Uint64() - blockchain.Config().XDPoS.Gap,
+		GapNumber:         blockchain.Config().XDPoS.V2.FirstSwitchBlock.Uint64() - blockchain.Config().XDPoS.Gap,
 	}
 	extra = types.ExtraFields_v2{
 		Round:      types.Round(blockchain.Config().XDPoS.Epoch) + 2,
@@ -168,7 +168,7 @@ func TestAdaptorIsEpochSwitch(t *testing.T) {
 	extraBytes, err = extra.EncodeToBytes()
 	assert.Nil(t, err)
 	header.Extra = extraBytes
-	header.Number.Add(blockchain.Config().XDPoS.V2.SwitchBlock, big.NewInt(101))
+	header.Number.Add(blockchain.Config().XDPoS.V2.FirstSwitchBlock, big.NewInt(101))
 	isEpochSwitchBlock, _, err = adaptor.IsEpochSwitch(header)
 	assert.Nil(t, err)
 	assert.False(t, isEpochSwitchBlock, "header should not be epoch switch", header)
diff --git a/consensus/tests/engine_v2_tests/authorised_masternode_test.go b/consensus/tests/engine_v2_tests/authorised_masternode_test.go
index 9ac58044e1..98d2f63a20 100644
--- a/consensus/tests/engine_v2_tests/authorised_masternode_test.go
+++ b/consensus/tests/engine_v2_tests/authorised_masternode_test.go
@@ -1,6 +1,7 @@
 package engine_v2_tests
 
 import (
+	"math/big"
 	"testing"
 	"time"
 
@@ -33,21 +34,23 @@ func TestIsAuthorisedMNForConsensusV2(t *testing.T) {
 func TestIsYourTurnConsensusV2(t *testing.T) {
 	// we skip test for v1 since it's hard to make a real genesis block
 	blockchain, _, currentBlock, signer, signFn, _ := PrepareXDCTestBlockChainForV2Engine(t, 900, params.TestXDPoSMockChainConfig, nil)
-	minePeriod := params.TestXDPoSV2Config.MinePeriod
+	minePeriod := params.TestV2Configs[0].MinePeriod
 	adaptor := blockchain.Engine().(*XDPoS.XDPoS)
 	blockNum := 901
 	blockCoinBase := "0x111000000000000000000000000000000123"
 	currentBlock = CreateBlock(blockchain, params.TestXDPoSMockChainConfig, currentBlock, blockNum, 1, blockCoinBase, signer, signFn, nil, nil)
+	currentBlockHeader := currentBlock.Header()
+	currentBlockHeader.Time = big.NewInt(time.Now().Unix())
 	err := blockchain.InsertBlock(currentBlock)
 	assert.Nil(t, err)
 	// Less then Mine Period
-	isYourTurn, err := adaptor.YourTurn(blockchain, currentBlock.Header(), common.HexToAddress("xdc0D3ab14BBaD3D99F4203bd7a11aCB94882050E7e"))
+	isYourTurn, err := adaptor.YourTurn(blockchain, currentBlockHeader, common.HexToAddress("xdc0D3ab14BBaD3D99F4203bd7a11aCB94882050E7e"))
 	assert.Nil(t, err)
 	assert.False(t, isYourTurn)
 
 	time.Sleep(time.Duration(minePeriod) * time.Second)
 	// The second address is valid as the round starting from 1
-	isYourTurn, err = adaptor.YourTurn(blockchain, currentBlock.Header(), common.HexToAddress("xdc0D3ab14BBaD3D99F4203bd7a11aCB94882050E7e"))
+	isYourTurn, err = adaptor.YourTurn(blockchain, currentBlockHeader, common.HexToAddress("xdc0D3ab14BBaD3D99F4203bd7a11aCB94882050E7e"))
 	assert.Nil(t, err)
 	assert.True(t, isYourTurn)
 
@@ -77,3 +80,30 @@ func TestIsYourTurnConsensusV2(t *testing.T) {
 	assert.False(t, isYourTurn)
 
 }
+
+func TestIsYourTurnConsensusV2CrossConfig(t *testing.T) {
+	// we skip test for v1 since it's hard to make a real genesis block
+	blockchain, _, currentBlock, signer, signFn, _ := PrepareXDCTestBlockChainForV2Engine(t, 910, params.TestXDPoSMockChainConfig, nil)
+	firstMinePeriod := blockchain.Config().XDPoS.V2.CurrentConfig.MinePeriod
+
+	adaptor := blockchain.Engine().(*XDPoS.XDPoS)
+	blockNum := 911 // 911 is new config switch block
+	blockCoinBase := "0x111000000000000000000000000000000123"
+	currentBlock = CreateBlock(blockchain, params.TestXDPoSMockChainConfig, currentBlock, blockNum, 1, blockCoinBase, signer, signFn, nil, nil)
+	currentBlockHeader := currentBlock.Header()
+	currentBlockHeader.Time = big.NewInt(time.Now().Unix())
+	err := blockchain.InsertBlock(currentBlock)
+	assert.Nil(t, err)
+	// after first mine period
+	time.Sleep(time.Duration(firstMinePeriod) * time.Second)
+	isYourTurn, err := adaptor.YourTurn(blockchain, currentBlockHeader, common.HexToAddress("xdc0D3ab14BBaD3D99F4203bd7a11aCB94882050E7e"))
+	assert.Nil(t, err)
+	assert.False(t, isYourTurn)
+
+	// after new mine period
+	secondMinePeriod := blockchain.Config().XDPoS.V2.CurrentConfig.MinePeriod
+	time.Sleep(time.Duration(secondMinePeriod-firstMinePeriod) * time.Second)
+	isYourTurn, err = adaptor.YourTurn(blockchain, currentBlockHeader, common.HexToAddress("xdc0D3ab14BBaD3D99F4203bd7a11aCB94882050E7e"))
+	assert.Nil(t, err)
+	assert.True(t, isYourTurn)
+}
diff --git a/consensus/tests/engine_v2_tests/forensics_test.go b/consensus/tests/engine_v2_tests/forensics_test.go
index a55efaf0e8..35c6463fef 100644
--- a/consensus/tests/engine_v2_tests/forensics_test.go
+++ b/consensus/tests/engine_v2_tests/forensics_test.go
@@ -177,11 +177,11 @@ func TestForensicsMonitoringNotOnSameChainButHaveSameRoundQC(t *testing.T) {
 			assert.Equal(t, types.Round(13), content.SmallerRoundInfo.QuorumCert.ProposedBlockInfo.Round)
 			assert.Equal(t, uint64(913), content.SmallerRoundInfo.QuorumCert.ProposedBlockInfo.Number.Uint64())
 			assert.Equal(t, 9, len(content.SmallerRoundInfo.HashPath))
-			assert.Equal(t, 4, len(content.SmallerRoundInfo.SignerAddresses))
+			assert.Equal(t, 5, len(content.SmallerRoundInfo.SignerAddresses))
 			assert.Equal(t, types.Round(13), content.LargerRoundInfo.QuorumCert.ProposedBlockInfo.Round)
 			assert.Equal(t, uint64(912), content.LargerRoundInfo.QuorumCert.ProposedBlockInfo.Number.Uint64())
 			assert.Equal(t, 8, len(content.LargerRoundInfo.HashPath))
-			assert.Equal(t, 4, len(content.LargerRoundInfo.SignerAddresses))
+			assert.Equal(t, 5, len(content.LargerRoundInfo.SignerAddresses))
 			return
 		case <-time.After(5 * time.Second):
 			t.FailNow()
@@ -237,7 +237,7 @@ func TestForensicsMonitoringNotOnSameChainDoNotHaveSameRoundQC(t *testing.T) {
 			assert.Equal(t, types.Round(14), content.SmallerRoundInfo.QuorumCert.ProposedBlockInfo.Round)
 			assert.Equal(t, uint64(914), content.SmallerRoundInfo.QuorumCert.ProposedBlockInfo.Number.Uint64())
 			assert.Equal(t, 10, len(content.SmallerRoundInfo.HashPath))
-			assert.Equal(t, 4, len(content.SmallerRoundInfo.SignerAddresses))
+			assert.Equal(t, 5, len(content.SmallerRoundInfo.SignerAddresses))
 			assert.Equal(t, types.Round(16), content.LargerRoundInfo.QuorumCert.ProposedBlockInfo.Round)
 			assert.Equal(t, uint64(906), content.LargerRoundInfo.QuorumCert.ProposedBlockInfo.Number.Uint64())
 			assert.Equal(t, 2, len(content.LargerRoundInfo.HashPath))
@@ -300,7 +300,7 @@ func TestForensicsAcrossEpoch(t *testing.T) {
 			assert.Equal(t, types.Round(900), content.SmallerRoundInfo.QuorumCert.ProposedBlockInfo.Round)
 			assert.Equal(t, uint64(1800), content.SmallerRoundInfo.QuorumCert.ProposedBlockInfo.Number.Uint64())
 			assert.Equal(t, 10, len(content.SmallerRoundInfo.HashPath))
-			assert.Equal(t, 4, len(content.SmallerRoundInfo.SignerAddresses))
+			assert.Equal(t, 5, len(content.SmallerRoundInfo.SignerAddresses))
 			assert.Equal(t, types.Round(902), content.LargerRoundInfo.QuorumCert.ProposedBlockInfo.Round)
 			assert.Equal(t, uint64(1792), content.LargerRoundInfo.QuorumCert.ProposedBlockInfo.Number.Uint64())
 			assert.Equal(t, 2, len(content.LargerRoundInfo.HashPath))
diff --git a/consensus/tests/engine_v2_tests/helper.go b/consensus/tests/engine_v2_tests/helper.go
index 0fd2014e20..4b267864bc 100644
--- a/consensus/tests/engine_v2_tests/helper.go
+++ b/consensus/tests/engine_v2_tests/helper.go
@@ -41,6 +41,8 @@ var (
 	acc1Key, _  = crypto.HexToECDSA("8a1f9a8f95be41cd7ccb6168179afb4504aefe388d1e14474d32c45c72ce7b7a")
 	acc2Key, _  = crypto.HexToECDSA("49a7b37aa6f6645917e7b807e9d1c00d4fa71f18343b0d4122a4d2df64dd6fee")
 	acc3Key, _  = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
+	acc4Key, _  = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f292")
+	acc5Key, _  = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f293")
 	voterKey, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee04aefe388d1e14474d32c45c72ce7b7a")
 	acc1Addr    = crypto.PubkeyToAddress(acc1Key.PublicKey)  //xdc703c4b2bD70c169f5717101CaeE543299Fc946C7
 	acc2Addr    = crypto.PubkeyToAddress(acc2Key.PublicKey)  //xdc0D3ab14BBaD3D99F4203bd7a11aCB94882050E7e
@@ -310,10 +312,10 @@ func PrepareXDCTestBlockChainForV2Engine(t *testing.T, numOfBlocks int, chainCon
 	for i := 1; i <= numOfBlocks; i++ {
 		blockCoinBase := fmt.Sprintf("0x111000000000000000000000000000000%03d", i)
 		// for v2 blocks, fill in correct coinbase
-		if int64(i) > chainConfig.XDPoS.V2.SwitchBlock.Int64() {
+		if int64(i) > chainConfig.XDPoS.V2.FirstSwitchBlock.Int64() {
 			blockCoinBase = signer.Hex()
 		}
-		roundNumber := int64(i) - chainConfig.XDPoS.V2.SwitchBlock.Int64()
+		roundNumber := int64(i) - chainConfig.XDPoS.V2.FirstSwitchBlock.Int64()
 		block := CreateBlock(blockchain, chainConfig, currentBlock, i, roundNumber, blockCoinBase, signer, signFn, nil, nil)
 
 		err = blockchain.InsertBlock(block)
@@ -346,7 +348,7 @@ func PrepareXDCTestBlockChainForV2Engine(t *testing.T, numOfBlocks int, chainCon
 		}
 
 		// First v2 block
-		if (int64(i) - chainConfig.XDPoS.V2.SwitchBlock.Int64()) == 1 {
+		if (int64(i) - chainConfig.XDPoS.V2.FirstSwitchBlock.Int64()) == 1 {
 			lastv1BlockNumber := block.Header().Number.Uint64() - 1
 			checkpointBlockNumber := lastv1BlockNumber - lastv1BlockNumber%chainConfig.XDPoS.Epoch
 			checkpointHeader := blockchain.GetHeaderByNumber(checkpointBlockNumber)
@@ -396,10 +398,10 @@ func PrepareXDCTestBlockChainWithPenaltyForV2Engine(t *testing.T, numOfBlocks in
 	for i := 1; i <= numOfBlocks; i++ {
 		blockCoinBase := fmt.Sprintf("0x111000000000000000000000000000000%03d", i)
 		// for v2 blocks, fill in correct coinbase
-		if int64(i) > chainConfig.XDPoS.V2.SwitchBlock.Int64() {
+		if int64(i) > chainConfig.XDPoS.V2.FirstSwitchBlock.Int64() {
 			blockCoinBase = signer.Hex()
 		}
-		roundNumber := int64(i) - chainConfig.XDPoS.V2.SwitchBlock.Int64()
+		roundNumber := int64(i) - chainConfig.XDPoS.V2.FirstSwitchBlock.Int64()
 		// use signer itself as penalty
 		block := CreateBlock(blockchain, chainConfig, currentBlock, i, roundNumber, blockCoinBase, signer, signFn, signer[:], nil)
 
@@ -424,7 +426,7 @@ func CreateBlock(blockchain *BlockChain, chainConfig *params.ChainConfig, starti
 	merkleRoot := "35999dded35e8db12de7e6c1471eb9670c162eec616ecebbaf4fddd4676fb930"
 	var header *types.Header
 
-	if big.NewInt(int64(blockNumber)).Cmp(chainConfig.XDPoS.V2.SwitchBlock) == 1 { // Build engine v2 compatible extra data field
+	if big.NewInt(int64(blockNumber)).Cmp(chainConfig.XDPoS.V2.FirstSwitchBlock) == 1 { // Build engine v2 compatible extra data field
 		extraInBytes := generateV2Extra(roundNumber, currentBlock, signer, signFn, signersKey)
 
 		header = &types.Header{
@@ -434,9 +436,9 @@ func CreateBlock(blockchain *BlockChain, chainConfig *params.ChainConfig, starti
 			Coinbase:   common.HexToAddress(blockCoinBase),
 			Extra:      extraInBytes,
 		}
-		if int64(blockNumber) == (chainConfig.XDPoS.V2.SwitchBlock.Int64() + 1) { // This is the first v2 block, we need to copy the last v1 epoch master node list and inject into v2 validators
+		if int64(blockNumber) == (chainConfig.XDPoS.V2.FirstSwitchBlock.Int64() + 1) { // This is the first v2 block, we need to copy the last v1 epoch master node list and inject into v2 validators
 			// Get last master node list from last v1 block
-			lastv1Block := blockchain.GetBlockByNumber(chainConfig.XDPoS.V2.SwitchBlock.Uint64())
+			lastv1Block := blockchain.GetBlockByNumber(chainConfig.XDPoS.V2.FirstSwitchBlock.Uint64())
 			masternodesFromV1LastEpoch := decodeMasternodesFromHeaderExtra(lastv1Block.Header())
 			for _, v := range masternodesFromV1LastEpoch {
 				header.Validators = append(header.Validators, v[:]...)
@@ -444,7 +446,7 @@ func CreateBlock(blockchain *BlockChain, chainConfig *params.ChainConfig, starti
 		} else if roundNumber%int64(chainConfig.XDPoS.Epoch) == 0 {
 			// epoch switch blocks, copy the master node list and inject into v2 validators
 			// Get last master node list from last v1 block
-			lastv1Block := blockchain.GetBlockByNumber(chainConfig.XDPoS.V2.SwitchBlock.Uint64())
+			lastv1Block := blockchain.GetBlockByNumber(chainConfig.XDPoS.V2.FirstSwitchBlock.Uint64())
 			masternodesFromV1LastEpoch := decodeMasternodesFromHeaderExtra(lastv1Block.Header())
 			for _, v := range masternodesFromV1LastEpoch {
 				header.Validators = append(header.Validators, v[:]...)
@@ -463,7 +465,7 @@ func CreateBlock(blockchain *BlockChain, chainConfig *params.ChainConfig, starti
 		}
 
 		// Inject the hardcoded master node list for the last v1 epoch block and all v1 epoch switch blocks (excluding genesis)
-		if big.NewInt(int64(blockNumber)).Cmp(chainConfig.XDPoS.V2.SwitchBlock) == 0 || blockNumber%int(chainConfig.XDPoS.Epoch) == 0 {
+		if big.NewInt(int64(blockNumber)).Cmp(chainConfig.XDPoS.V2.FirstSwitchBlock) == 0 || blockNumber%int(chainConfig.XDPoS.Epoch) == 0 {
 			// reset extra
 			header.Extra = []byte{}
 			if len(header.Extra) < utils.ExtraVanity {
@@ -522,7 +524,7 @@ func createBlockFromHeader(bc *BlockChain, customHeader *types.Header, txs []*ty
 		Difficulty:  difficulty,
 		Number:      customHeader.Number,
 		GasLimit:    1200000000,
-		Time:        big.NewInt(time.Now().Unix()),
+		Time:        big.NewInt(time.Now().Unix() - 1000000 + int64(customHeader.Number.Uint64()*10)),
 		Extra:       customHeader.Extra,
 		Validator:   customHeader.Validator,
 		Validators:  customHeader.Validators,
@@ -582,7 +584,7 @@ func findSignerAndSignFn(bc *BlockChain, header *types.Header, signer common.Add
 	addressedSignFn := signFn
 
 	// If v2 block, we need to use extra data's round to find who is creating the block in order to verify the validator
-	if header.Number.Cmp(config.XDPoS.V2.SwitchBlock) > 0 {
+	if header.Number.Cmp(config.XDPoS.V2.FirstSwitchBlock) > 0 {
 		var decodedExtraField types.ExtraFields_v2
 		err := utils.DecodeBytesExtraFields(header.Extra, &decodedExtraField)
 		if err != nil {
@@ -659,7 +661,7 @@ func generateV2Extra(roundNumber int64, currentBlock *types.Block, signer common
 	var signatures []types.Signature
 	if len(accKeys) == 0 {
 		// Sign from acc 1, 2, 3 by default
-		accKeys = append(accKeys, acc1Key, acc2Key, acc3Key)
+		accKeys = append(accKeys, acc1Key, acc2Key, acc3Key, voterKey)
 	}
 	for _, acc := range accKeys {
 		h := SignHashByPK(acc, types.VoteSigHash(voteForSign).Bytes())
diff --git a/consensus/tests/engine_v2_tests/initial_test.go b/consensus/tests/engine_v2_tests/initial_test.go
index 9d9a7d9b21..a26b7f59aa 100644
--- a/consensus/tests/engine_v2_tests/initial_test.go
+++ b/consensus/tests/engine_v2_tests/initial_test.go
@@ -32,7 +32,7 @@ func TestInitialFirstV2Blcok(t *testing.T) {
 	expectedQuorumCert := &types.QuorumCert{
 		ProposedBlockInfo: blockInfo,
 		Signatures:        nil,
-		GapNumber:         blockchain.Config().XDPoS.V2.SwitchBlock.Uint64() - blockchain.Config().XDPoS.Gap,
+		GapNumber:         blockchain.Config().XDPoS.V2.FirstSwitchBlock.Uint64() - blockchain.Config().XDPoS.Gap,
 	}
 	assert.Equal(t, types.Round(1), round)
 	assert.Equal(t, expectedQuorumCert, highQC)
@@ -43,10 +43,10 @@ func TestInitialFirstV2Blcok(t *testing.T) {
 	assert.Equal(t, uint64(450), snap.Number)
 
 	// Test Running channels
-	WaitPeriod := <-adaptor.WaitPeriodCh
-	assert.Equal(t, params.TestXDPoSMockChainConfig.XDPoS.V2.WaitPeriod, WaitPeriod)
+	waitPeriod := <-adaptor.WaitPeriodCh
+	assert.Equal(t, params.TestXDPoSMockChainConfig.XDPoS.V2.CurrentConfig.WaitPeriod, waitPeriod)
 
-	t.Logf("Waiting %d secs for timeout to happen", params.TestXDPoSMockChainConfig.XDPoS.V2.TimeoutPeriod)
+	t.Logf("Waiting %d secs for timeout to happen", params.TestXDPoSMockChainConfig.XDPoS.V2.CurrentConfig.TimeoutPeriod)
 	timeoutMsg := <-adaptor.EngineV2.BroadcastCh
 	assert.NotNil(t, timeoutMsg)
 	assert.Equal(t, types.Round(1), timeoutMsg.(*types.Timeout).Round)
@@ -104,7 +104,7 @@ func TestInitialOtherV2Block(t *testing.T) {
 	expectedQuorumCert := &types.QuorumCert{
 		ProposedBlockInfo: blockInfo,
 		Signatures:        []types.Signature{},
-		GapNumber:         blockchain.Config().XDPoS.V2.SwitchBlock.Uint64() - blockchain.Config().XDPoS.Gap,
+		GapNumber:         blockchain.Config().XDPoS.V2.FirstSwitchBlock.Uint64() - blockchain.Config().XDPoS.Gap,
 	}
 	assert.Equal(t, types.Round(11), round)
 	assert.Equal(t, expectedQuorumCert, highQC)
diff --git a/consensus/tests/engine_v2_tests/mine_test.go b/consensus/tests/engine_v2_tests/mine_test.go
index 61cec63647..a56658e1e8 100644
--- a/consensus/tests/engine_v2_tests/mine_test.go
+++ b/consensus/tests/engine_v2_tests/mine_test.go
@@ -18,7 +18,7 @@ import (
 func TestYourTurnInitialV2(t *testing.T) {
 	config := params.TestXDPoSMockChainConfig
 	blockchain, _, parentBlock, signer, signFn, _ := PrepareXDCTestBlockChainForV2Engine(t, int(config.XDPoS.Epoch)-1, config, nil)
-	minePeriod := config.XDPoS.V2.MinePeriod
+	minePeriod := config.XDPoS.V2.CurrentConfig.MinePeriod
 	adaptor := blockchain.Engine().(*XDPoS.XDPoS)
 
 	// Insert block 900
@@ -64,7 +64,7 @@ func TestShouldMineOncePerRound(t *testing.T) {
 	config := params.TestXDPoSMockChainConfig
 	blockchain, _, block910, signer, _, _ := PrepareXDCTestBlockChainForV2Engine(t, 910, config, nil)
 	adaptor := blockchain.Engine().(*XDPoS.XDPoS)
-	minePeriod := config.XDPoS.V2.MinePeriod
+	minePeriod := config.XDPoS.V2.CurrentConfig.MinePeriod
 
 	// Make sure we seal the parentBlock 910
 	_, err := adaptor.Seal(blockchain, block910, nil)
diff --git a/consensus/tests/engine_v2_tests/proposed_block_test.go b/consensus/tests/engine_v2_tests/proposed_block_test.go
index a85a59898d..db7485911b 100644
--- a/consensus/tests/engine_v2_tests/proposed_block_test.go
+++ b/consensus/tests/engine_v2_tests/proposed_block_test.go
@@ -261,7 +261,7 @@ func TestShouldNotSendVoteMessageIfAlreadyVoteForThisRound(t *testing.T) {
 	select {
 	case <-engineV2.BroadcastCh:
 		t.Fatal("Should not trigger vote")
-	case <-time.After(5 * time.Second):
+	case <-time.After(3 * time.Second):
 		// Shoud not trigger setNewRound
 		round, _, _, _, highestVotedRound, _ = engineV2.GetPropertiesFaker()
 		assert.Equal(t, types.Round(6), round)
@@ -290,7 +290,7 @@ func TestShouldNotSendVoteMsgIfBlockInfoRoundNotEqualCurrentRound(t *testing.T)
 	select {
 	case <-engineV2.BroadcastCh:
 		t.Fatal("Should not trigger vote")
-	case <-time.After(5 * time.Second):
+	case <-time.After(3 * time.Second):
 		// Shoud not trigger setNewRound
 		round, _, _, _, _, _ := engineV2.GetPropertiesFaker()
 		assert.Equal(t, types.Round(8), round)
@@ -334,7 +334,7 @@ func TestShouldNotSendVoteMsgIfBlockNotExtendedFromAncestor(t *testing.T) {
 	select {
 	case <-engineV2.BroadcastCh:
 		t.Fatal("Should not trigger vote")
-	case <-time.After(5 * time.Second):
+	case <-time.After(3 * time.Second):
 		// Shoud not trigger setNewRound
 		round, _, _, _, _, _ := engineV2.GetPropertiesFaker()
 		assert.Equal(t, types.Round(7), round)
diff --git a/consensus/tests/engine_v2_tests/reward_test.go b/consensus/tests/engine_v2_tests/reward_test.go
index 55dc4104ca..5b44560f9f 100644
--- a/consensus/tests/engine_v2_tests/reward_test.go
+++ b/consensus/tests/engine_v2_tests/reward_test.go
@@ -23,7 +23,7 @@ func TestHookRewardV2(t *testing.T) {
 	err = json.Unmarshal([]byte(configString), &config)
 	assert.Nil(t, err)
 	// set switch to 1800, so that it covers 901-1799, 1800-2700 two epochs
-	config.XDPoS.V2.SwitchBlock.SetUint64(1800)
+	config.XDPoS.V2.FirstSwitchBlock.SetUint64(1800)
 
 	blockchain, _, _, signer, signFn, _ := PrepareXDCTestBlockChainForV2Engine(t, int(config.XDPoS.Epoch)*5, &config, nil)
 
@@ -104,7 +104,7 @@ func TestHookRewardV2SplitReward(t *testing.T) {
 	err = json.Unmarshal([]byte(configString), &config)
 	assert.Nil(t, err)
 	// set switch to 1800, so that it covers 901-1799, 1800-2700 two epochs
-	config.XDPoS.V2.SwitchBlock.SetUint64(1800)
+	config.XDPoS.V2.FirstSwitchBlock.SetUint64(1800)
 
 	blockchain, _, _, signer, signFn, _ := PrepareXDCTestBlockChainForV2Engine(t, int(config.XDPoS.Epoch)*3, &config, nil)
 
diff --git a/consensus/tests/engine_v2_tests/timeout_test.go b/consensus/tests/engine_v2_tests/timeout_test.go
index 54a571eba9..943fd6fbbf 100644
--- a/consensus/tests/engine_v2_tests/timeout_test.go
+++ b/consensus/tests/engine_v2_tests/timeout_test.go
@@ -1,6 +1,7 @@
 package engine_v2_tests
 
 import (
+	"math/big"
 	"strconv"
 	"strings"
 	"testing"
@@ -41,11 +42,11 @@ func TestCountdownTimeoutNotToSendTimeoutMessageIfNotInMasternodeList(t *testing
 	select {
 	case <-engineV2.BroadcastCh:
 		t.Fatalf("Not suppose to receive timeout msg")
-	case <-time.After(15 * time.Second): //Countdown is only 1s wait, let's wait for 3s here
+	case <-time.After(10 * time.Second): //Countdown is only 1s wait, let's wait for 3s here
 	}
 }
 
-func TestSyncInfoAfterReachTimeoutSnycThreadhold(t *testing.T) {
+func TestSyncInfoAfterReachTimeoutSyncThreadhold(t *testing.T) {
 	blockchain, _, _, _, _, _ := PrepareXDCTestBlockChainForV2Engine(t, 901, params.TestXDPoSMockChainConfig, nil)
 	engineV2 := blockchain.Engine().(*XDPoS.XDPoS).EngineV2
 	engineV2.SetNewRoundFaker(blockchain, 1, true)
@@ -83,8 +84,63 @@ func TestSyncInfoAfterReachTimeoutSnycThreadhold(t *testing.T) {
 	assert.Equal(t, 2, syncInfoCounter)
 }
 
+func TestTimeoutPeriodAndThreadholdConfigChange(t *testing.T) {
+	blockchain, _, currentBlock, signer, signFn, _ := PrepareXDCTestBlockChainForV2Engine(t, 1799, params.TestXDPoSMockChainConfig, nil)
+	engineV2 := blockchain.Engine().(*XDPoS.XDPoS).EngineV2
+	// engineV2.SetNewRoundFaker(blockchain, 1, true)
+
+	// Because messages are sending async and on random order, so use this way to test
+	var timeoutCounter, syncInfoCounter int
+	for i := 0; i < 3; i++ {
+		obj := <-engineV2.BroadcastCh
+		switch v := obj.(type) {
+		case *types.Timeout:
+			timeoutCounter++
+		case *types.SyncInfo:
+			syncInfoCounter++
+		default:
+			log.Error("Unknown message type received", "value", v)
+		}
+	}
+
+	assert.Equal(t, 2, timeoutCounter)
+	assert.Equal(t, 1, syncInfoCounter)
+
+	// Create another block to trigger update parameters
+	blockNum := 1800
+	blockCoinBase := "0x111000000000000000000000000000000123"
+	currentBlock = CreateBlock(blockchain, params.TestXDPoSMockChainConfig, currentBlock, blockNum, 900, blockCoinBase, signer, signFn, nil, nil)
+	currentBlockHeader := currentBlock.Header()
+	currentBlockHeader.Time = big.NewInt(time.Now().Unix())
+	err := blockchain.InsertBlock(currentBlock)
+	assert.Nil(t, err)
+
+	engineV2.UpdateParams() // it will be triggered automatically on the real code by other process
+
+	t.Log("waiting for another consecutive period")
+	// another consecutive period
+	t1 := time.Now()
+	for i := 0; i < 5; i++ {
+		obj := <-engineV2.BroadcastCh
+		switch v := obj.(type) {
+		case *types.Timeout:
+			timeoutCounter++
+		case *types.SyncInfo:
+			syncInfoCounter++
+		default:
+			log.Error("Unknown message type received", "value", v)
+		}
+	}
+	t2 := time.Now()
+	timediff := t2.Sub(t1).Seconds()
+	assert.Equal(t, 6, timeoutCounter)
+	assert.Equal(t, 2, syncInfoCounter)
+	assert.Less(t, timediff, float64(20))
+}
+
 // Timeout handler
 func TestTimeoutMessageHandlerSuccessfullyGenerateTCandSyncInfo(t *testing.T) {
+	params.TestXDPoSMockChainConfig.XDPoS.V2.CurrentConfig = params.TestV2Configs[0]
 	blockchain, _, _, _, _, _ := PrepareXDCTestBlockChainForV2Engine(t, 11, params.TestXDPoSMockChainConfig, nil)
 	engineV2 := blockchain.Engine().(*XDPoS.XDPoS).EngineV2
 
diff --git a/consensus/tests/engine_v2_tests/verify_header_test.go b/consensus/tests/engine_v2_tests/verify_header_test.go
index e5e9236953..ff0b95c68d 100644
--- a/consensus/tests/engine_v2_tests/verify_header_test.go
+++ b/consensus/tests/engine_v2_tests/verify_header_test.go
@@ -27,8 +27,6 @@ func TestShouldVerifyBlock(t *testing.T) {
 	assert.Nil(t, err)
 	// Enable verify
 	config.XDPoS.V2.SkipV2Validation = false
-	// Skip the mining time validation by set mine time to 0
-	config.XDPoS.V2.MinePeriod = 0
 	// Block 901 is the first v2 block with round of 1
 	blockchain, _, _, signer, signFn, _ := PrepareXDCTestBlockChainForV2Engine(t, 910, &config, nil)
 	adaptor := blockchain.Engine().(*XDPoS.XDPoS)
@@ -97,8 +95,9 @@ func TestShouldVerifyBlock(t *testing.T) {
 	err = adaptor.VerifyHeader(blockchain, parentNotExistBlock, true)
 	assert.Equal(t, consensus.ErrUnknownAncestor, err)
 
+	block901 := blockchain.GetBlockByNumber(901).Header()
 	tooFastMinedBlock := blockchain.GetBlockByNumber(902).Header()
-	tooFastMinedBlock.Time = big.NewInt(time.Now().Unix() - 10)
+	tooFastMinedBlock.Time = big.NewInt(block901.Time.Int64() - 10)
 	err = adaptor.VerifyHeader(blockchain, tooFastMinedBlock, true)
 	assert.Equal(t, utils.ErrInvalidTimestamp, err)
 
@@ -107,7 +106,7 @@ func TestShouldVerifyBlock(t *testing.T) {
 	err = adaptor.VerifyHeader(blockchain, invalidDifficultyBlock, true)
 	assert.Equal(t, utils.ErrInvalidDifficulty, err)
 
-	// Creat an invalid QC round
+	// Create an invalid QC round
 	proposedBlockInfo := &types.BlockInfo{
 		Hash:   blockchain.GetBlockByNumber(902).Hash(),
 		Round:  types.Round(2),
@@ -169,6 +168,62 @@ func TestShouldVerifyBlock(t *testing.T) {
 	assert.Equal(t, utils.ErrPenaltiesNotLegit, err)
 }
 
+func TestConfigSwitchOnDifferentCertThreshold(t *testing.T) {
+	b, err := json.Marshal(params.TestXDPoSMockChainConfig)
+	assert.Nil(t, err)
+	configString := string(b)
+
+	var config params.ChainConfig
+	err = json.Unmarshal([]byte(configString), &config)
+	assert.Nil(t, err)
+	// Enable verify
+	config.XDPoS.V2.SkipV2Validation = false
+	// Block 901 is the first v2 block with round of 1
+	blockchain, _, _, _, _, _ := PrepareXDCTestBlockChainForV2Engine(t, 915, &config, nil)
+
+	adaptor := blockchain.Engine().(*XDPoS.XDPoS)
+
+	// Genrate QC
+	proposedBlockInfo := &types.BlockInfo{
+		Hash:   blockchain.GetBlockByNumber(911).Hash(),
+		Round:  types.Round(11),
+		Number: blockchain.GetBlockByNumber(911).Number(),
+	}
+	voteForSign := &types.VoteForSign{
+		ProposedBlockInfo: proposedBlockInfo,
+		GapNumber:         450,
+	}
+
+	// Sign from acc 1, 2, 3
+	acc1SignedHash := SignHashByPK(acc1Key, types.VoteSigHash(voteForSign).Bytes())
+	acc2SignedHash := SignHashByPK(acc2Key, types.VoteSigHash(voteForSign).Bytes())
+	acc3SignedHash := SignHashByPK(acc3Key, types.VoteSigHash(voteForSign).Bytes())
+	var signatures []types.Signature
+	signatures = append(signatures, acc1SignedHash, acc2SignedHash, acc3SignedHash)
+	quorumCert := &types.QuorumCert{
+		ProposedBlockInfo: proposedBlockInfo,
+		Signatures:        signatures,
+		GapNumber:         450,
+	}
+
+	extra := types.ExtraFields_v2{
+		Round:      types.Round(12),
+		QuorumCert: quorumCert,
+	}
+	extraInBytes, err := extra.EncodeToBytes()
+	if err != nil {
+		panic(fmt.Errorf("Error encode extra into bytes: %v", err))
+	}
+
+	// after 910 require 5 signs, but we only give 3 signs
+	block912 := blockchain.GetBlockByNumber(912).Header()
+	block912.Extra = extraInBytes
+	err = adaptor.VerifyHeader(blockchain, block912, true)
+
+	// Error happens after verify QC, means verify QC passed
+	assert.Equal(t, utils.ErrInvalidQC, err)
+}
+
 func TestShouldFailIfNotEnoughQCSignatures(t *testing.T) {
 	b, err := json.Marshal(params.TestXDPoSMockChainConfig)
 	assert.Nil(t, err)
@@ -179,8 +234,6 @@ func TestShouldFailIfNotEnoughQCSignatures(t *testing.T) {
 	assert.Nil(t, err)
 	// Enable verify
 	config.XDPoS.V2.SkipV2Validation = false
-	// Skip the mining time validation by set mine time to 0
-	config.XDPoS.V2.MinePeriod = 0
 	// Block 901 is the first v2 block with round of 1
 	blockchain, _, currentBlock, signer, signFn, _ := PrepareXDCTestBlockChainForV2Engine(t, 902, &config, nil)
 	adaptor := blockchain.Engine().(*XDPoS.XDPoS)
@@ -232,8 +285,6 @@ func TestShouldVerifyHeaders(t *testing.T) {
 	assert.Nil(t, err)
 	// Enable verify
 	config.XDPoS.V2.SkipV2Validation = false
-	// Skip the mining time validation by set mine time to 0
-	config.XDPoS.V2.MinePeriod = 0
 	// Block 901 is the first v2 block with round of 1
 	blockchain, _, _, _, _, _ := PrepareXDCTestBlockChainForV2Engine(t, 910, &config, nil)
 	adaptor := blockchain.Engine().(*XDPoS.XDPoS)
@@ -273,8 +324,6 @@ func TestShouldVerifyHeadersEvenIfParentsNotYetWrittenIntoDB(t *testing.T) {
 	assert.Nil(t, err)
 	// Enable verify
 	config.XDPoS.V2.SkipV2Validation = false
-	// Skip the mining time validation by set mine time to 0
-	config.XDPoS.V2.MinePeriod = 0
 	// Block 901 is the first v2 block with round of 1
 	blockchain, _, block910, signer, signFn, _ := PrepareXDCTestBlockChainForV2Engine(t, 910, &config, nil)
 	adaptor := blockchain.Engine().(*XDPoS.XDPoS)
@@ -283,12 +332,12 @@ func TestShouldVerifyHeadersEvenIfParentsNotYetWrittenIntoDB(t *testing.T) {
 
 	// Create block 911 but don't write into DB
 	blockNumber := 911
-	roundNumber := int64(blockNumber) - config.XDPoS.V2.SwitchBlock.Int64()
+	roundNumber := int64(blockNumber) - config.XDPoS.V2.FirstSwitchBlock.Int64()
 	block911 := CreateBlock(blockchain, &config, block910, blockNumber, roundNumber, signer.Hex(), signer, signFn, nil, nil)
 
 	// Create block 912 and not write into DB as well
 	blockNumber = 912
-	roundNumber = int64(blockNumber) - config.XDPoS.V2.SwitchBlock.Int64()
+	roundNumber = int64(blockNumber) - config.XDPoS.V2.FirstSwitchBlock.Int64()
 	block912 := CreateBlock(blockchain, &config, block911, blockNumber, roundNumber, signer.Hex(), signer, signFn, nil, nil)
 
 	headersTobeVerified = append(headersTobeVerified, block910.Header(), block911.Header(), block912.Header())
diff --git a/core/blockchain.go b/core/blockchain.go
index 9b23f71333..127abcb199 100644
--- a/core/blockchain.go
+++ b/core/blockchain.go
@@ -2541,7 +2541,7 @@ func (bc *BlockChain) UpdateM1() error {
 		header := bc.CurrentHeader()
 		var maxMasternodes int
 		// check if block number is increase ms checkpoint
-		if bc.chainConfig.IsTIPIncreaseMasternodes(header.Number) || (bc.chainConfig.XDPoS.V2.SwitchBlock != nil && header.Number.Cmp(bc.chainConfig.XDPoS.V2.SwitchBlock) == 1) {
+		if bc.chainConfig.IsTIPIncreaseMasternodes(header.Number) || (bc.chainConfig.XDPoS.V2.FirstSwitchBlock != nil && header.Number.Cmp(bc.chainConfig.XDPoS.V2.FirstSwitchBlock) == 1) {
 			// using new masterndoes
 			maxMasternodes = common.MaxMasternodesV2
 		} else {
diff --git a/eth/hooks/engine_v2_hooks.go b/eth/hooks/engine_v2_hooks.go
index e1f44305ad..c9ec604635 100644
--- a/eth/hooks/engine_v2_hooks.go
+++ b/eth/hooks/engine_v2_hooks.go
@@ -86,7 +86,7 @@ func AttachConsensusV2Hooks(adaptor *XDPoS.XDPoS, bc *core.BlockChain, chainConf
 
 		// get list check penalties signing block & list master nodes wil comeback
 		// start to calc comeback at v2 block + limitPenaltyEpochV2 to avoid reading v1 blocks
-		comebackHeight := (common.LimitPenaltyEpochV2+1)*chain.Config().XDPoS.Epoch + chain.Config().XDPoS.V2.SwitchBlock.Uint64()
+		comebackHeight := (common.LimitPenaltyEpochV2+1)*chain.Config().XDPoS.Epoch + chain.Config().XDPoS.V2.FirstSwitchBlock.Uint64()
 		penComebacks := []common.Address{}
 		if number.Uint64() > comebackHeight {
 			pens := adaptor.EngineV2.GetPreviousPenaltyByHash(chain, currentHash, common.LimitPenaltyEpochV2)
@@ -170,7 +170,7 @@ func AttachConsensusV2Hooks(adaptor *XDPoS.XDPoS, bc *core.BlockChain, chainConf
 		}
 		rewards := make(map[string]interface{})
 		// skip hook reward if this is the first v2
-		if number == chain.Config().XDPoS.V2.SwitchBlock.Uint64()+1 {
+		if number == chain.Config().XDPoS.V2.FirstSwitchBlock.Uint64()+1 {
 			return rewards, nil
 		}
 		start := time.Now()
@@ -235,7 +235,7 @@ func GetSigningTxCount(c *XDPoS.XDPoS, chain consensus.ChainReader, header *type
 		if err != nil {
 			return nil, err
 		}
-		if isEpochSwitch && i != chain.Config().XDPoS.V2.SwitchBlock.Uint64()+1 {
+		if isEpochSwitch && i != chain.Config().XDPoS.V2.FirstSwitchBlock.Uint64()+1 {
 			epochCount += 1
 			if epochCount == signEpochCount {
 				endBlockNumber = header.Number.Uint64() - 1
diff --git a/miner/worker.go b/miner/worker.go
index 299f9a9aa0..86ea4f125c 100644
--- a/miner/worker.go
+++ b/miner/worker.go
@@ -267,8 +267,7 @@ func (self *worker) update() {
 	defer self.chainSideSub.Unsubscribe()
 
 	// timeout waiting for v1 inital value
-	// TODO: Read value from config after we decide where is the config
-	waitPeriod := 10
+	waitPeriod := 2
 	WaitPeriodCh := self.engine.(*XDPoS.XDPoS).WaitPeriodCh
 	defer close(WaitPeriodCh)
 
diff --git a/params/config.go b/params/config.go
index 75454b14b9..9501255804 100644
--- a/params/config.go
+++ b/params/config.go
@@ -26,6 +26,7 @@ import (
 const (
 	ConsensusEngineVersion1 = "v1"
 	ConsensusEngineVersion2 = "v2"
+	Default                 = 0
 )
 
 var (
@@ -36,30 +37,92 @@ var (
 )
 
 var (
-	XDPoSV2Config = &V2{
-		SwitchBlock:          big.NewInt(9999999999),
-		CertThreshold:        common.MaxMasternodesV2*2/3 + 1,
-		TimeoutSyncThreshold: 3,
-		TimeoutPeriod:        60,
-		WaitPeriod:           10,
-		MinePeriod:           10,
+	MainnetV2Configs = map[uint64]*V2Config{
+		Default: {
+			SwitchBlock:          big.NewInt(9999999999),
+			CertThreshold:        common.MaxMasternodesV2*2/3 + 1,
+			TimeoutSyncThreshold: 3,
+			TimeoutPeriod:        60,
+			WaitPeriod:           10,
+			MinePeriod:           10,
+		},
+		9999999999: {
+			SwitchBlock:          big.NewInt(9999999999),
+			CertThreshold:        common.MaxMasternodesV2*2/3 + 1,
+			TimeoutSyncThreshold: 3,
+			TimeoutPeriod:        60,
+			WaitPeriod:           10,
+			MinePeriod:           10,
+		},
 	}
-	TestXDPoSV2Config = &V2{
-		SwitchBlock:          big.NewInt(900),
-		CertThreshold:        3,
-		TimeoutSyncThreshold: 2,
-		TimeoutPeriod:        10,
-		WaitPeriod:           1,
-		MinePeriod:           2,
-		SkipV2Validation:     true,
+	TestV2Configs = map[uint64]*V2Config{
+		Default: {
+			SwitchBlock:          big.NewInt(900),
+			CertThreshold:        3,
+			TimeoutSyncThreshold: 2,
+			TimeoutPeriod:        4,
+			WaitPeriod:           1,
+			MinePeriod:           2,
+		},
+		900: {
+			SwitchBlock:          big.NewInt(900),
+			CertThreshold:        3,
+			TimeoutSyncThreshold: 2,
+			TimeoutPeriod:        4,
+			WaitPeriod:           1,
+			MinePeriod:           2,
+		},
+		910: {
+			SwitchBlock:          big.NewInt(910),
+			CertThreshold:        5,
+			TimeoutSyncThreshold: 2,
+			TimeoutPeriod:        4,
+			WaitPeriod:           2,
+			MinePeriod:           3,
+		},
+		1799: {
+			SwitchBlock:          big.NewInt(1799),
+			CertThreshold:        5,
+			TimeoutSyncThreshold: 4,
+			TimeoutPeriod:        5,
+			WaitPeriod:           2,
+			MinePeriod:           3,
+		},
 	}
-	DevnetXDPoSV2Config = &V2{
-		SwitchBlock:          big.NewInt(7074000),
-		CertThreshold:        common.MaxMasternodesV2*2/3 + 1,
-		TimeoutSyncThreshold: 5,
-		TimeoutPeriod:        25,
-		WaitPeriod:           10,
-		MinePeriod:           10,
+
+	DevnetV2Configs = map[uint64]*V2Config{
+		Default: {
+			SwitchBlock:          big.NewInt(7074000),
+			CertThreshold:        4,
+			TimeoutSyncThreshold: 5,
+			TimeoutPeriod:        10,
+			WaitPeriod:           5,
+			MinePeriod:           5,
+		},
+		7074000: {
+			SwitchBlock:          big.NewInt(7074000),
+			CertThreshold:        common.MaxMasternodesV2*2/3 + 1,
+			TimeoutSyncThreshold: 5,
+			TimeoutPeriod:        25,
+			WaitPeriod:           10,
+			MinePeriod:           10,
+		},
+		9900000: {
+			SwitchBlock:          big.NewInt(9900000),
+			CertThreshold:        common.MaxMasternodesV2*3/5 + 1,
+			TimeoutSyncThreshold: 5,
+			TimeoutPeriod:        25,
+			WaitPeriod:           5,
+			MinePeriod:           20,
+		},
+		10000000: {
+			SwitchBlock:          big.NewInt(10000000),
+			CertThreshold:        common.MaxMasternodesV2*2/3 + 1,
+			TimeoutSyncThreshold: 5,
+			TimeoutPeriod:        25,
+			WaitPeriod:           10,
+			MinePeriod:           10,
+		},
 	}
 
 	// XDPoSChain mainnet config
@@ -78,7 +141,11 @@ var (
 			RewardCheckpoint:    900,
 			Gap:                 450,
 			FoudationWalletAddr: common.HexToAddress("xdc92a289fe95a85c53b8d0d113cbaef0c1ec98ac65"),
-			V2:                  XDPoSV2Config,
+			V2: &V2{
+				FirstSwitchBlock: MainnetV2Configs[0].SwitchBlock,
+				CurrentConfig:    MainnetV2Configs[0],
+				AllConfigs:       MainnetV2Configs,
+			},
 		},
 	}
 
@@ -116,11 +183,16 @@ var (
 			RewardCheckpoint:    900,
 			Gap:                 450,
 			FoudationWalletAddr: common.HexToAddress("xdc746249c61f5832c5eed53172776b460491bdcd5c"),
-			V2:                  TestXDPoSV2Config,
+			V2: &V2{
+				FirstSwitchBlock: TestV2Configs[0].SwitchBlock,
+				CurrentConfig:    TestV2Configs[0],
+				AllConfigs:       TestV2Configs,
+				SkipV2Validation: true,
+			},
 		},
 	}
 
-	// TestnetChainConfig contains the chain parameters to run a node on the Ropsten test network.
+	// DevnetChainConfig contains the chain parameters to run a node on the Ropsten test network.
 	DevnetChainConfig = &ChainConfig{
 		ChainId:        big.NewInt(551),
 		HomesteadBlock: big.NewInt(1),
@@ -136,7 +208,11 @@ var (
 			RewardCheckpoint:    900,
 			Gap:                 450,
 			FoudationWalletAddr: common.HexToAddress("0x746249c61f5832c5eed53172776b460491bdcd5c"),
-			V2:                  DevnetXDPoSV2Config,
+			V2: &V2{
+				FirstSwitchBlock: DevnetV2Configs[0].SwitchBlock,
+				CurrentConfig:    DevnetV2Configs[0],
+				AllConfigs:       DevnetV2Configs,
+			},
 		},
 	}
 
@@ -155,7 +231,11 @@ var (
 		XDPoS: &XDPoSConfig{
 			Period: 15,
 			Epoch:  30000,
-			V2:     XDPoSV2Config,
+			V2: &V2{
+				FirstSwitchBlock: MainnetV2Configs[0].SwitchBlock,
+				CurrentConfig:    MainnetV2Configs[0],
+				AllConfigs:       MainnetV2Configs,
+			},
 		},
 	}
 
@@ -175,7 +255,32 @@ var (
 	AllCliqueProtocolChanges = &ChainConfig{big.NewInt(1337), big.NewInt(0), nil, false, big.NewInt(0), common.Hash{}, big.NewInt(0), big.NewInt(0), big.NewInt(0), nil, nil, &CliqueConfig{Period: 0, Epoch: 30000}, nil}
 
 	// XDPoS config with v2 engine after block 901
-	TestXDPoSMockChainConfig = &ChainConfig{big.NewInt(1337), big.NewInt(0), nil, false, big.NewInt(0), common.Hash{}, big.NewInt(0), big.NewInt(0), big.NewInt(0), nil, new(EthashConfig), nil, &XDPoSConfig{Epoch: 900, Gap: 450, SkipV1Validation: true, V2: TestXDPoSV2Config, FoudationWalletAddr: common.HexToAddress("0x0000000000000000000000000000000000000068"), Reward: 250}}
+	TestXDPoSMockChainConfig = &ChainConfig{
+		big.NewInt(1337),
+		big.NewInt(0),
+		nil,
+		false,
+		big.NewInt(0),
+		common.Hash{},
+		big.NewInt(0),
+		big.NewInt(0),
+		big.NewInt(0),
+		nil,
+		new(EthashConfig),
+		nil,
+		&XDPoSConfig{
+			Epoch:               900,
+			Gap:                 450,
+			SkipV1Validation:    true,
+			FoudationWalletAddr: common.HexToAddress("0x0000000000000000000000000000000000000068"),
+			Reward:              250,
+			V2: &V2{
+				FirstSwitchBlock: TestV2Configs[0].SwitchBlock,
+				CurrentConfig:    TestV2Configs[0],
+				AllConfigs:       TestV2Configs,
+			},
+		},
+	}
 
 	TestChainConfig = &ChainConfig{big.NewInt(1), big.NewInt(0), nil, false, big.NewInt(0), common.Hash{}, big.NewInt(0), big.NewInt(0), big.NewInt(0), nil, new(EthashConfig), nil, nil}
 	TestRules       = TestChainConfig.Rules(new(big.Int))
@@ -242,28 +347,69 @@ type XDPoSConfig struct {
 }
 
 type V2 struct {
+	FirstSwitchBlock *big.Int             `json:"switchBlock"`
+	CurrentConfig    *V2Config            `json:"config"`
+	AllConfigs       map[uint64]*V2Config `json:"allConfigs"`
+	configIndex      []uint64             //list of switch block of configs
+	SkipV2Validation bool                 //Skip Block Validation for testing purpose, V2 consensus only
+}
+
+type V2Config struct {
 	WaitPeriod           int      `json:"waitPeriod"`           // Miner wait period to check mine event
 	MinePeriod           int      `json:"minePeriod"`           // Miner mine period to mine a block
 	SwitchBlock          *big.Int `json:"switchBlock"`          // v1 to v2 switch block number
 	TimeoutSyncThreshold int      `json:"timeoutSyncThreshold"` // send syncInfo after number of timeout
 	TimeoutPeriod        int      `json:"timeoutPeriod"`        // Duration in ms
 	CertThreshold        int      `json:"certificateThreshold"` // Necessary number of messages from master nodes to form a certificate
-	SkipV2Validation     bool     //Skip Block Validation for testing purpose, V2 consensus only
 }
 
 // String implements the stringer interface, returning the consensus engine details.
+func (c *XDPoSConfig) BuildConfigIndex() {
+	var list []uint64
+
+	for i := range c.V2.AllConfigs {
+		list = append(list, i)
+	}
+
+	// sort, sort lib doesn't support type uint64, it's ok to have O(n^2)  because only few items in the list
+	for i := 0; i < len(list)-1; i++ {
+		for j := i + 1; j < len(list); j++ {
+			if list[i] > list[j] {
+				list[i], list[j] = list[j], list[i]
+			}
+		}
+	}
+	c.V2.configIndex = list
+}
+
 func (c *XDPoSConfig) String() string {
 	return "XDPoS"
 }
 
+func (c *XDPoSConfig) updateV2Config(num uint64) {
+	var index uint64
+
+	//find the right config
+	for i := range c.V2.configIndex {
+		if c.V2.configIndex[i] <= num {
+			index = c.V2.configIndex[i]
+		} else {
+			break
+		}
+	}
+	// update to current config
+	c.V2.CurrentConfig = c.V2.AllConfigs[index]
+}
+
 func (c *XDPoSConfig) BlockConsensusVersion(num *big.Int, extraByte []byte, skipExtraCheck bool) string {
-	if c.V2 != nil && c.V2.SwitchBlock != nil && num.Cmp(c.V2.SwitchBlock) > 0 {
-		if skipExtraCheck {
-			return ConsensusEngineVersion2
-		}
-		if len(extraByte) == 0 || extraByte[0] != 2 {
-			return ConsensusEngineVersion1
-		}
+	if !skipExtraCheck && (len(extraByte) == 0 || extraByte[0] != 2) {
+		return ConsensusEngineVersion1
+	}
+
+	if c.V2 != nil && c.V2.FirstSwitchBlock != nil && num.Cmp(c.V2.FirstSwitchBlock) > 0 {
+		// We have to check each block configuration due to reorg chain case
+		// Block may get rollback and old config need to apply to verify block
+		c.updateV2Config(num.Uint64() - 1)
 		return ConsensusEngineVersion2
 	}
 	return ConsensusEngineVersion1