diff --git a/.github/workflows/beekeeper.yml b/.github/workflows/beekeeper.yml
index 95a09cfc1dc..b785ebf2f23 100644
--- a/.github/workflows/beekeeper.yml
+++ b/.github/workflows/beekeeper.yml
@@ -162,6 +162,9 @@ jobs:
       - name: Test staking
         id: stake
         run: timeout ${TIMEOUT} beekeeper check --cluster-name local-dns --checks ci-stake
+      - name: Test redundancy
+        id: redundancy
+        run: timeout ${TIMEOUT} beekeeper check --cluster-name local-dns --checks ci-redundancy
       - name: Collect debug artifacts
         if: failure()
         run: |
diff --git a/pkg/api/chunk.go b/pkg/api/chunk.go
index 25e1d6c65ed..df3ef547318 100644
--- a/pkg/api/chunk.go
+++ b/pkg/api/chunk.go
@@ -13,6 +13,7 @@ import (
 	"strconv"
 
 	"github.com/ethersphere/bee/pkg/cac"
+	"github.com/ethersphere/bee/pkg/soc"
 
 	"github.com/ethersphere/bee/pkg/jsonhttp"
 	"github.com/ethersphere/bee/pkg/postage"
@@ -111,10 +112,31 @@ func (s *Service) chunkUploadHandler(w http.ResponseWriter, r *http.Request) {
 
 	chunk, err := cac.NewWithDataSpan(data)
 	if err != nil {
+		// not a valid cac chunk. Check if it's a replica soc chunk.
 		logger.Debug("chunk upload: create chunk failed", "error", err)
-		logger.Error(nil, "chunk upload: create chunk error")
-		jsonhttp.InternalServerError(ow, "create chunk error")
-		return
+
+		// FromChunk only uses the chunk data to recreate the soc chunk. So the address is irrelevant.
+		sch, err := soc.FromChunk(swarm.NewChunk(swarm.EmptyAddress, data))
+		if err != nil {
+			logger.Debug("chunk upload: create soc chunk from data failed", "error", err)
+			logger.Error(nil, "chunk upload: create chunk error")
+			jsonhttp.InternalServerError(ow, "create chunk error")
+			return
+		}
+		chunk, err = sch.Chunk()
+		if err != nil {
+			logger.Debug("chunk upload: create chunk from soc failed", "error", err)
+			logger.Error(nil, "chunk upload: create chunk error")
+			jsonhttp.InternalServerError(ow, "create chunk error")
+			return
+		}
+
+		if !soc.Valid(chunk) {
+			logger.Debug("chunk upload: invalid soc chunk")
+			logger.Error(nil, "chunk upload: create chunk error")
+			jsonhttp.InternalServerError(ow, "create chunk error")
+			return
+		}
 	}
 
 	err = putter.Put(r.Context(), chunk)
diff --git a/pkg/api/router.go b/pkg/api/router.go
index d4934ca8f09..3e4574ed896 100644
--- a/pkg/api/router.go
+++ b/pkg/api/router.go
@@ -220,7 +220,7 @@ func (s *Service) mountAPI() {
 
 	handle("/chunks", jsonhttp.MethodHandler{
 		"POST": web.ChainHandlers(
-			jsonhttp.NewMaxBodyBytesHandler(swarm.ChunkWithSpanSize),
+			jsonhttp.NewMaxBodyBytesHandler(swarm.SocMaxChunkSize),
 			web.FinalHandlerFunc(s.chunkUploadHandler),
 		),
 	})
diff --git a/pkg/soc/soc_test.go b/pkg/soc/soc_test.go
index e4f6fb4e199..105a7cdedde 100644
--- a/pkg/soc/soc_test.go
+++ b/pkg/soc/soc_test.go
@@ -47,6 +47,41 @@ func TestNew(t *testing.T) {
 	}
 }
 
+func TestReplica(t *testing.T) {
+	sig, err := hex.DecodeString("5acd384febc133b7b245e5ddc62d82d2cded9182d2716126cd8844509af65a053deb418208027f548e3e88343af6f84a8772fb3cebc0a1833a0ea7ec0c1348311b")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	payload := []byte("foo")
+	ch, err := cac.New(payload)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	id := make([]byte, swarm.HashSize)
+	s, err := soc.NewSigned(id, ch, swarm.ReplicasOwner, sig)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	ch, err = s.Chunk()
+	if err != nil {
+		t.Fatal(err)
+	}
+	sch, err := soc.FromChunk(swarm.NewChunk(swarm.EmptyAddress, ch.Data()))
+	if err != nil {
+		t.Fatal(err)
+	}
+	ch, err = sch.Chunk()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !soc.Valid(ch) {
+		t.Fatal("invalid soc chunk")
+	}
+}
+
 func TestNewSigned(t *testing.T) {
 	t.Parallel()