diff --git a/network/gossip.go b/network/gossip.go
index d588bc7fd..cf9570309 100644
--- a/network/gossip.go
+++ b/network/gossip.go
@@ -25,6 +25,7 @@ func newGossipService(ctx context.Context, host lp2phost.Host, eventCh chan Even
 	conf *Config, log *logger.SubLogger,
 ) *gossipService {
 	opts := []lp2pps.Option{
+		lp2pps.WithFloodPublish(true),
 		lp2pps.WithMessageSignaturePolicy(lp2pps.StrictNoSign),
 		lp2pps.WithNoAuthor(),
 		lp2pps.WithMessageIdFn(MessageIDFunc),
@@ -35,15 +36,17 @@ func newGossipService(ctx context.Context, host lp2phost.Host, eventCh chan Even
 		opts = append(opts, lp2pps.WithPeerExchange(true))
 	}
 
+	gsParams := lp2pps.DefaultGossipSubParams()
 	if conf.IsGossiper {
 		// turn off the mesh in gossiper mode
-		lp2pps.GossipSubD = 0
-		lp2pps.GossipSubDscore = 0
-		lp2pps.GossipSubDlo = 0
-		lp2pps.GossipSubDhi = 0
-		lp2pps.GossipSubDout = 0
-		lp2pps.GossipSubDlazy = conf.ScaledMinConns()
+		gsParams.D = 0
+		gsParams.Dscore = 0
+		gsParams.Dlo = 0
+		gsParams.Dhi = 0
+		gsParams.Dout = 0
+		gsParams.Dlazy = conf.ScaledMinConns()
 	}
+	opts = append(opts, lp2pps.WithGossipSubParams(gsParams))
 
 	pubsub, err := lp2pps.NewGossipSub(ctx, host, opts...)
 	if err != nil {
diff --git a/sync/bundle/bundle.go b/sync/bundle/bundle.go
index 09c231c97..e0ebb1c45 100644
--- a/sync/bundle/bundle.go
+++ b/sync/bundle/bundle.go
@@ -20,8 +20,9 @@ const (
 )
 
 type Bundle struct {
-	Flags   int
-	Message message.Message
+	Flags      int
+	SequenceNo int
+	Message    message.Message
 }
 
 func NewBundle(msg message.Message) *Bundle {
@@ -43,10 +44,15 @@ func (b *Bundle) CompressIt() {
 	b.Flags = util.SetFlag(b.Flags, BundleFlagCompressed)
 }
 
+func (b *Bundle) SetSequenceNo(seqNo int) {
+	b.SequenceNo = seqNo
+}
+
 type _Bundle struct {
 	Flags       int          `cbor:"1,keyasint"`
 	MessageType message.Type `cbor:"2,keyasint"`
 	MessageData []byte       `cbor:"3,keyasint"`
+	SequenceNo  int          `cbor:"4,keyasint"`
 }
 
 func (b *Bundle) Encode() ([]byte, error) {
@@ -66,6 +72,7 @@ func (b *Bundle) Encode() ([]byte, error) {
 		Flags:       b.Flags,
 		MessageType: b.Message.Type(),
 		MessageData: data,
+		SequenceNo:  b.SequenceNo,
 	}
 
 	return cbor.Marshal(msg)
@@ -95,6 +102,7 @@ func (b *Bundle) Decode(r io.Reader) (int, error) {
 	}
 
 	b.Flags = bdl.Flags
+	b.SequenceNo = bdl.SequenceNo
 	b.Message = msg
 	return bytesRead, cbor.Unmarshal(data, msg)
 }
diff --git a/sync/bundle/bundle_test.go b/sync/bundle/bundle_test.go
index 7438effd9..b96002bd0 100644
--- a/sync/bundle/bundle_test.go
+++ b/sync/bundle/bundle_test.go
@@ -81,7 +81,8 @@ func TestDecodeVoteCBOR(t *testing.T) {
 			"035879a101a70101" +
 			"02186403010458200264572d4d6bfcd2140d4f885fd5a32fe42fdbf40551e4ff89f3d235e32b4b92055501c0067d277f2dff" +
 			"99943016d6a0f379cf09846c6f06f60758308ab7aecbe03c4ed5b688bcb7e848baffa62bcbf1a4021522c56693f0a7bbcc1f" +
-			"e865277556ee59c1f63ba592acfe1b43")
+			"e865277556ee59c1f63ba592acfe1b43" +
+			"0401") // SequenceNo
 	d2, _ := hex.DecodeString(
 		"a3" +
 			"01190100" + // flags: 0x0100 (compressed)
@@ -89,7 +90,8 @@ func TestDecodeVoteCBOR(t *testing.T) {
 			"0358951f8b08" +
 			"000000000000ff00790086ffa101a7010102186403010458200264572d4d6bfcd2140d4f885fd5a32fe42fdbf40551e4ff89" +
 			"f3d235e32b4b92055501c0067d277f2dff99943016d6a0f379cf09846c6f06f60758308ab7aecbe03c4ed5b688bcb7e848ba" +
-			"ffa62bcbf1a4021522c56693f0a7bbcc1fe865277556ee59c1f63ba592acfe1b43010000ffff798ce7ec79000000")
+			"ffa62bcbf1a4021522c56693f0a7bbcc1fe865277556ee59c1f63ba592acfe1b43010000ffff798ce7ec79000000" +
+			"0401") // SequenceNo
 
 	bdl1 := new(Bundle)
 	bdl2 := new(Bundle)
@@ -102,3 +104,10 @@ func TestDecodeVoteCBOR(t *testing.T) {
 	assert.Equal(t, bdl1.Message, bdl2.Message)
 	assert.Contains(t, bdl1.String(), "vote")
 }
+
+func TestSetSequenceNo(t *testing.T) {
+	bdl := new(Bundle)
+	bdl.SetSequenceNo(1001)
+
+	assert.Equal(t, 1001, bdl.SequenceNo)
+}
diff --git a/sync/peerset/peer_set.go b/sync/peerset/peer_set.go
index e8f679924..14a9bcf84 100644
--- a/sync/peerset/peer_set.go
+++ b/sync/peerset/peer_set.go
@@ -25,6 +25,7 @@ type PeerSet struct {
 	sessions           map[int]*session.Session
 	nextSessionID      int
 	sessionTimeout     time.Duration
+	totalSentBundles   int
 	totalSentBytes     int64
 	totalReceivedBytes int64
 	sentBytes          map[message.Type]int64
@@ -326,10 +327,11 @@ func (ps *PeerSet) IncreaseReceivedBytesCounter(pid peer.ID, msgType message.Typ
 	ps.receivedBytes[msgType] += c
 }
 
-func (ps *PeerSet) IncreaseSentBytesCounter(msgType message.Type, c int64, pid *peer.ID) {
+func (ps *PeerSet) IncreaseSentCounters(msgType message.Type, c int64, pid *peer.ID) {
 	ps.lk.Lock()
 	defer ps.lk.Unlock()
 
+	ps.totalSentBundles++
 	ps.totalSentBytes += c
 	ps.sentBytes[msgType] += c
 
@@ -339,6 +341,13 @@ func (ps *PeerSet) IncreaseSentBytesCounter(msgType message.Type, c int64, pid *
 	}
 }
 
+func (ps *PeerSet) TotalSentBundles() int {
+	ps.lk.RLock()
+	defer ps.lk.RUnlock()
+
+	return ps.totalSentBundles
+}
+
 func (ps *PeerSet) TotalSentBytes() int64 {
 	ps.lk.RLock()
 	defer ps.lk.RUnlock()
diff --git a/sync/peerset/peer_set_test.go b/sync/peerset/peer_set_test.go
index 05fc4819d..8880227fd 100644
--- a/sync/peerset/peer_set_test.go
+++ b/sync/peerset/peer_set_test.go
@@ -75,8 +75,8 @@ func TestPeerSet(t *testing.T) {
 		peerSet.IncreaseReceivedBundlesCounter(pid1)
 		peerSet.IncreaseReceivedBytesCounter(pid1, message.TypeBlocksResponse, 100)
 		peerSet.IncreaseReceivedBytesCounter(pid1, message.TypeTransactions, 150)
-		peerSet.IncreaseSentBytesCounter(message.TypeBlocksRequest, 200, nil)
-		peerSet.IncreaseSentBytesCounter(message.TypeBlocksRequest, 250, &pid1)
+		peerSet.IncreaseSentCounters(message.TypeBlocksRequest, 200, nil)
+		peerSet.IncreaseSentCounters(message.TypeBlocksRequest, 250, &pid1)
 
 		peer1 := peerSet.getPeer(pid1)
 
@@ -100,6 +100,7 @@ func TestPeerSet(t *testing.T) {
 		assert.Equal(t, peerSet.TotalSentBytes(), int64(450))
 		assert.Equal(t, peerSet.SentBytesMessageType(message.TypeBlocksRequest), int64(450))
 		assert.Equal(t, peerSet.SentBytes(), sentBytes)
+		assert.Equal(t, peerSet.TotalSentBundles(), 2)
 	})
 
 	t.Run("Testing UpdateHeight", func(t *testing.T) {
diff --git a/sync/sync.go b/sync/sync.go
index 8f7c6ca4a..763d42d66 100644
--- a/sync/sync.go
+++ b/sync/sync.go
@@ -147,6 +147,8 @@ func (sync *synchronizer) prepareBundle(msg message.Message) *bundle.Bundle {
 			// It's localnet and for testing purpose only
 		}
 
+		bdl.SetSequenceNo(sync.peerSet.TotalSentBundles())
+
 		return bdl
 	}
 	return nil
@@ -167,7 +169,7 @@ func (sync *synchronizer) sendTo(msg message.Message, to peer.ID) {
 		}
 
 		sync.peerSet.UpdateLastSent(to)
-		sync.peerSet.IncreaseSentBytesCounter(msg.Type(), int64(len(data)), &to)
+		sync.peerSet.IncreaseSentCounters(msg.Type(), int64(len(data)), &to)
 		sync.logger.Info("bundle sent", "bundle", bdl, "to", to)
 	}
 }
@@ -194,7 +196,7 @@ func (sync *synchronizer) broadcast(msg message.Message) {
 		} else {
 			sync.logger.Info("broadcasting new bundle", "bundle", bdl)
 		}
-		sync.peerSet.IncreaseSentBytesCounter(msg.Type(), int64(len(data)), nil)
+		sync.peerSet.IncreaseSentCounters(msg.Type(), int64(len(data)), nil)
 	}
 }
 
diff --git a/sync/sync_test.go b/sync/sync_test.go
index 86d42b002..1063d5248 100644
--- a/sync/sync_test.go
+++ b/sync/sync_test.go
@@ -373,20 +373,35 @@ func TestBroadcastBlockAnnounce(t *testing.T) {
 
 	t.Run("Should announce the block", func(t *testing.T) {
 		blk, cert := td.GenerateTestBlock(td.RandHeight())
-		msg := message.BlockAnnounceMessage{Block: blk, Certificate: cert}
+		msg := message.NewBlockAnnounceMessage(blk, cert)
 
-		td.broadcastCh <- &msg
+		td.sync.broadcast(msg)
 
 		td.shouldPublishMessageWithThisType(t, message.TypeBlockAnnounce)
 	})
 
 	t.Run("Should NOT announce the block", func(t *testing.T) {
 		blk, cert := td.GenerateTestBlock(td.RandHeight())
-		msg := message.BlockAnnounceMessage{Block: blk, Certificate: cert}
+		msg := message.NewBlockAnnounceMessage(blk, cert)
 
 		td.sync.cache.AddBlock(blk)
-		td.broadcastCh <- &msg
+		td.sync.broadcast(msg)
 
 		td.shouldNotPublishMessageWithThisType(t, message.TypeBlockAnnounce)
 	})
 }
+
+func TestBundleSequenceNo(t *testing.T) {
+	td := setup(t, nil)
+
+	msg := message.NewQueryProposalMessage(td.RandHeight(), td.RandValAddress())
+
+	td.sync.broadcast(msg)
+	bdl1 := td.shouldPublishMessageWithThisType(t, message.TypeQueryProposal)
+	assert.Equal(t, 0, bdl1.SequenceNo)
+
+	// Sending the same message again
+	td.sync.broadcast(msg)
+	bdl2 := td.shouldPublishMessageWithThisType(t, message.TypeQueryProposal)
+	assert.Equal(t, 1, bdl2.SequenceNo)
+}