diff --git a/les/backend.go b/les/backend.go
index 200fe8c3c1..9bd8c9282a 100644
--- a/les/backend.go
+++ b/les/backend.go
@@ -223,8 +223,8 @@ func (s *LightEthereum) Protocols() []p2p.Protocol {
 // Start implements node.Service, starting all internal goroutines needed by the
 // Ethereum protocol implementation.
 func (s *LightEthereum) Start(srvr *p2p.Server) error {
-	s.startBloomHandlers(params.BloomBitsBlocksClient, params.HelperTrieConfirmations)
 	log.Warn("Light client mode is an experimental feature")
+	s.startBloomHandlers(params.BloomBitsBlocksClient)
 	s.netRPCService = ethapi.NewPublicNetAPI(srvr, s.networkId)
 	// clients are searching for the first advertised protocol in the list
 	protocolVersion := AdvertiseProtocolVersions[0]
diff --git a/les/bloombits.go b/les/bloombits.go
index 4e6fecbe20..aea0fcd5f4 100644
--- a/les/bloombits.go
+++ b/les/bloombits.go
@@ -43,7 +43,7 @@ const (
 
 // startBloomHandlers starts a batch of goroutines to accept bloom bit database
 // retrievals from possibly a range of filters and serving the data to satisfy.
-func (eth *LightEthereum) startBloomHandlers(sectionSize, confirms uint64) {
+func (eth *LightEthereum) startBloomHandlers(sectionSize uint64) {
 	for i := 0; i < bloomServiceThreads; i++ {
 		go func() {
 			for {
@@ -54,7 +54,7 @@ func (eth *LightEthereum) startBloomHandlers(sectionSize, confirms uint64) {
 				case request := <-eth.bloomRequests:
 					task := <-request
 					task.Bitsets = make([][]byte, len(task.Sections))
-					compVectors, err := light.GetBloomBits(task.Context, sectionSize, confirms, eth.odr, task.Bit, task.Sections)
+					compVectors, err := light.GetBloomBits(task.Context, eth.odr, task.Bit, task.Sections)
 					if err == nil {
 						for i := range task.Sections {
 							if blob, err := bitutil.DecompressBytes(compVectors[i], int(sectionSize/8)); err == nil {
diff --git a/les/handler.go b/les/handler.go
index f0a2f06347..dabeb83cf6 100644
--- a/les/handler.go
+++ b/les/handler.go
@@ -1149,8 +1149,8 @@ func (pm *ProtocolManager) getAccount(statedb *state.StateDB, root, hash common.
 func (pm *ProtocolManager) getHelperTrie(id uint, idx uint64) (common.Hash, string) {
 	switch id {
 	case htCanonical:
-		idxV2 := (idx+1)*(pm.indexerConfig.ChtClientSize/pm.indexerConfig.ChtSize) - 1
-		sectionHead := rawdb.ReadCanonicalHash(pm.chainDb, (idx+1)*pm.indexerConfig.ChtClientSize-1)
+		idxV2 := (idx+1)*(pm.indexerConfig.PairChtSize/pm.indexerConfig.ChtSize) - 1
+		sectionHead := rawdb.ReadCanonicalHash(pm.chainDb, (idx+1)*pm.indexerConfig.PairChtSize-1)
 		return light.GetChtRoot(pm.chainDb, idxV2, sectionHead), light.ChtTablePrefix
 	case htBloomBits:
 		sectionHead := rawdb.ReadCanonicalHash(pm.chainDb, (idx+1)*pm.indexerConfig.BloomTrieSize-1)
diff --git a/les/odr.go b/les/odr.go
index 7a775be8c7..4849cda545 100644
--- a/les/odr.go
+++ b/les/odr.go
@@ -71,6 +71,11 @@ func (odr *LesOdr) BloomIndexer() *core.ChainIndexer {
 	return odr.bloomIndexer
 }
 
+// IndexerConfig returns the indexer config.
+func (odr *LesOdr) IndexerConfig() *light.IndexerConfig {
+	return odr.indexerConfig
+}
+
 const (
 	MsgBlockBodies = iota
 	MsgCode
diff --git a/les/odr_requests.go b/les/odr_requests.go
index b5c9891cd2..f34cac0ae3 100644
--- a/les/odr_requests.go
+++ b/les/odr_requests.go
@@ -387,7 +387,7 @@ func (r *ChtRequest) Request(reqID uint64, peer *peer, config *light.IndexerConf
 		}
 		blockNum := binary.BigEndian.Uint64(req.Key)
 		// convert HelperTrie request to old CHT request
-		reqsV1 = ChtReq{ChtNum: (req.TrieIdx+1)*(config.ChtSize/config.ChtClientSize) - 1, BlockNum: blockNum, FromLevel: req.FromLevel}
+		reqsV1 = ChtReq{ChtNum: (req.TrieIdx+1)*(config.ChtSize/config.PairChtSize) - 1, BlockNum: blockNum, FromLevel: req.FromLevel}
 		return peer.RequestHelperTrieProofs(reqID, r.GetCost(peer), []interface{}{reqsV1})
 	case lpv2:
 		return peer.RequestHelperTrieProofs(reqID, r.GetCost(peer), []interface{}{req})
diff --git a/light/lightchain.go b/light/lightchain.go
index 80c58402cc..bb01e7d310 100644
--- a/light/lightchain.go
+++ b/light/lightchain.go
@@ -292,7 +292,7 @@ func (self *LightChain) GetBlockByHash(ctx context.Context, hash common.Hash) (*
 // GetBlockByNumber retrieves a block from the database or ODR service by
 // number, caching it (associated with its hash) if found.
 func (self *LightChain) GetBlockByNumber(ctx context.Context, number uint64) (*types.Block, error) {
-	hash, err := GetCanonicalHash(ctx, self.odr, self.indexerConfig.ChtSize, self.indexerConfig.ChtConfirm, number)
+	hash, err := GetCanonicalHash(ctx, self.odr, number)
 	if hash == (common.Hash{}) || err != nil {
 		return nil, err
 	}
@@ -459,7 +459,7 @@ func (self *LightChain) GetHeaderByNumberOdr(ctx context.Context, number uint64)
 	if header := self.hc.GetHeaderByNumber(number); header != nil {
 		return header, nil
 	}
-	return GetHeaderByNumber(ctx, self.indexerConfig.ChtSize, self.indexerConfig.ChtConfirm, self.odr, number)
+	return GetHeaderByNumber(ctx, self.odr, number)
 }
 
 // Config retrieves the header chain's chain configuration.
@@ -473,7 +473,7 @@ func (self *LightChain) SyncCht(ctx context.Context) bool {
 	chtCount, _, _ := self.odr.ChtIndexer().Sections()
 	if headNum+1 < chtCount*self.indexerConfig.ChtSize {
 		num := chtCount*self.indexerConfig.ChtSize - 1
-		header, err := GetHeaderByNumber(ctx, self.indexerConfig.ChtSize, self.indexerConfig.ChtConfirm, self.odr, num)
+		header, err := GetHeaderByNumber(ctx, self.odr, num)
 		if header != nil && err == nil {
 			self.mu.Lock()
 			if self.hc.CurrentHeader().Number.Uint64() < header.Number.Uint64() {
diff --git a/light/odr.go b/light/odr.go
index 15a649889e..aeefbe9395 100644
--- a/light/odr.go
+++ b/light/odr.go
@@ -40,6 +40,7 @@ type OdrBackend interface {
 	BloomTrieIndexer() *core.ChainIndexer
 	BloomIndexer() *core.ChainIndexer
 	Retrieve(ctx context.Context, req OdrRequest) error
+	IndexerConfig() *IndexerConfig
 }
 
 // OdrRequest is an interface for retrieval requests
diff --git a/light/odr_util.go b/light/odr_util.go
index e4d639b908..ee509993c1 100644
--- a/light/odr_util.go
+++ b/light/odr_util.go
@@ -30,7 +30,7 @@ import (
 
 var sha3_nil = crypto.Keccak256Hash(nil)
 
-func GetHeaderByNumber(ctx context.Context, size uint64, confirms uint64, odr OdrBackend, number uint64) (*types.Header, error) {
+func GetHeaderByNumber(ctx context.Context, odr OdrBackend, number uint64) (*types.Header, error) {
 	db := odr.Database()
 	hash := rawdb.ReadCanonicalHash(db, number)
 	if (hash != common.Hash{}) {
@@ -53,13 +53,13 @@ func GetHeaderByNumber(ctx context.Context, size uint64, confirms uint64, odr Od
 		for chtCount > 0 && canonicalHash != sectionHead && canonicalHash != (common.Hash{}) {
 			chtCount--
 			if chtCount > 0 {
-				sectionHeadNum = chtCount*size - 1
+				sectionHeadNum = chtCount*odr.IndexerConfig().ChtSize - 1
 				sectionHead = odr.ChtIndexer().SectionHead(chtCount - 1)
 				canonicalHash = rawdb.ReadCanonicalHash(db, sectionHeadNum)
 			}
 		}
 	}
-	if number >= chtCount*size {
+	if number >= chtCount*odr.IndexerConfig().ChtSize {
 		return nil, ErrNoTrustedCht
 	}
 	r := &ChtRequest{ChtRoot: GetChtRoot(db, chtCount-1, sectionHead), ChtNum: chtCount - 1, BlockNum: number}
@@ -69,12 +69,12 @@ func GetHeaderByNumber(ctx context.Context, size uint64, confirms uint64, odr Od
 	return r.Header, nil
 }
 
-func GetCanonicalHash(ctx context.Context, odr OdrBackend, size uint64, confirm uint64, number uint64) (common.Hash, error) {
+func GetCanonicalHash(ctx context.Context, odr OdrBackend, number uint64) (common.Hash, error) {
 	hash := rawdb.ReadCanonicalHash(odr.Database(), number)
 	if (hash != common.Hash{}) {
 		return hash, nil
 	}
-	header, err := GetHeaderByNumber(ctx, size, confirm, odr, number)
+	header, err := GetHeaderByNumber(ctx, odr, number)
 	if header != nil {
 		return header.Hash(), nil
 	}
@@ -174,10 +174,10 @@ func GetBlockLogs(ctx context.Context, odr OdrBackend, hash common.Hash, number
 }
 
 // GetBloomBits retrieves a batch of compressed bloomBits vectors belonging to the given bit index and section indexes
-func GetBloomBits(ctx context.Context, size uint64, confirms uint64, odr OdrBackend, bitIdx uint, sectionIdxList []uint64) ([][]byte, error) {
-	db := odr.Database()
-	result := make([][]byte, len(sectionIdxList))
+func GetBloomBits(ctx context.Context, odr OdrBackend, bitIdx uint, sectionIdxList []uint64) ([][]byte, error) {
 	var (
+		db      = odr.Database()
+		result  = make([][]byte, len(sectionIdxList))
 		reqList []uint64
 		reqIdx  []int
 	)
@@ -193,7 +193,7 @@ func GetBloomBits(ctx context.Context, size uint64, confirms uint64, odr OdrBack
 		for bloomTrieCount > 0 && canonicalHash != sectionHead && canonicalHash != (common.Hash{}) {
 			bloomTrieCount--
 			if bloomTrieCount > 0 {
-				sectionHeadNum = bloomTrieCount*size - 1
+				sectionHeadNum = bloomTrieCount*odr.IndexerConfig().BloomTrieSize - 1
 				sectionHead = odr.BloomTrieIndexer().SectionHead(bloomTrieCount - 1)
 				canonicalHash = rawdb.ReadCanonicalHash(db, sectionHeadNum)
 			}
@@ -201,7 +201,7 @@ func GetBloomBits(ctx context.Context, size uint64, confirms uint64, odr OdrBack
 	}
 
 	for i, sectionIdx := range sectionIdxList {
-		sectionHead := rawdb.ReadCanonicalHash(db, (sectionIdx+1)*size-1)
+		sectionHead := rawdb.ReadCanonicalHash(db, (sectionIdx+1)*odr.IndexerConfig().BloomSize-1)
 		// if we don't have the canonical hash stored for this section head number, we'll still look for
 		// an entry with a zero sectionHead (we store it with zero section head too if we don't know it
 		// at the time of the retrieval)
@@ -209,6 +209,7 @@ func GetBloomBits(ctx context.Context, size uint64, confirms uint64, odr OdrBack
 		if err == nil {
 			result[i] = bloomBits
 		} else {
+			// TODO(rjl493456442) Convert sectionIndex to BloomTrie relative index
 			if sectionIdx >= bloomTrieCount {
 				return nil, ErrNoTrustedBloomTrie
 			}
diff --git a/light/postprocess.go b/light/postprocess.go
index 4e1793564c..07fdb53b1f 100644
--- a/light/postprocess.go
+++ b/light/postprocess.go
@@ -34,20 +34,35 @@ import (
 	"github.com/ethereum/go-ethereum/trie"
 )
 
-// IndexerConfig specifies a set of configs for chain indexers.
+// IndexerConfig includes a set of configs for chain indexers.
 type IndexerConfig struct {
-	ChtSize          uint64
-	ChtClientSize    uint64
-	ChtConfirm       uint64
-	BloomSize        uint64
-	BloomConfirm     uint64
-	BloomTrieSize    uint64
+	// The block frequency for creating CHTs.
+	ChtSize uint64
+
+	// A special auxiliary field represents client's chtsize for server config, otherwise represents server's chtsize.
+	PairChtSize uint64
+
+	// The number of confirmations needed to generate/accept a canonical hash help trie.
+	ChtConfirm uint64
+
+	// The block frequency for creating new bloom bits.
+	BloomSize uint64
+
+	// The number of confirmation needed before a bloom section is considered probably final and its rotated bits
+	// are calculated.
+	BloomConfirm uint64
+
+	// The block frequency for creating BloomTrie.
+	BloomTrieSize uint64
+
+	// The number of confirmations needed to generate/accept a bloom trie.
 	BloomTrieConfirm uint64
 }
 
+// DefaultServerIndexerConfig wraps a set of configs as a default indexer config for server side.
 var DefaultServerIndexerConfig = &IndexerConfig{
 	ChtSize:          params.CHTFrequencyServer,
-	ChtClientSize:    params.CHTFrequencyClient,
+	PairChtSize:      params.CHTFrequencyClient,
 	ChtConfirm:       params.HelperTrieProcessConfirmations,
 	BloomSize:        params.BloomBitsBlocks,
 	BloomConfirm:     params.BloomConfirms,
@@ -55,8 +70,10 @@ var DefaultServerIndexerConfig = &IndexerConfig{
 	BloomTrieConfirm: params.HelperTrieProcessConfirmations,
 }
 
+// DefaultClientIndexerConfig wraps a set of configs as a default indexer config for client side.
 var DefaultClientIndexerConfig = &IndexerConfig{
 	ChtSize:          params.CHTFrequencyClient,
+	PairChtSize:      params.CHTFrequencyServer,
 	ChtConfirm:       params.HelperTrieConfirmations,
 	BloomSize:        params.BloomBitsBlocksClient,
 	BloomConfirm:     params.HelperTrieConfirmations,
diff --git a/params/network_params.go b/params/network_params.go
index 91554b088d..74f8347d68 100644
--- a/params/network_params.go
+++ b/params/network_params.go
@@ -21,7 +21,7 @@ package params
 
 const (
 	// BloomBitsBlocks is the number of blocks a single bloom bit section vector
-	// contains.
+	// contains on the server side.
 	BloomBitsBlocks uint64 = 4096
 
 	// BloomBitsBlocksClient is the number of blocks a single bloom bit section vector
@@ -44,7 +44,7 @@ const (
 	// server/client sides.
 	BloomTrieFrequency = 32768
 
-	// HelperTrieConfirmations is the number of confirmations before a server is expected
+	// HelperTrieConfirmations is the number of confirmations before a client is expected
 	// to have the given HelperTrie available.
 	HelperTrieConfirmations = 2048