diff --git a/v2/netmap/marshal.go b/v2/netmap/marshal.go
index 32a6b76..3fa3388 100644
--- a/v2/netmap/marshal.go
+++ b/v2/netmap/marshal.go
@@ -500,3 +500,100 @@ func (l *LocalNodeInfoResponseBody) StableSize() (size int) {
 
 	return size
 }
+
+const (
+	_ = iota
+	netInfoCurEpochFNum
+	netInfoMagicNumFNum
+)
+
+func (i *NetworkInfo) StableMarshal(buf []byte) ([]byte, error) {
+	if i == nil {
+		return []byte{}, nil
+	}
+
+	if buf == nil {
+		buf = make([]byte, i.StableSize())
+	}
+
+	var (
+		offset, n int
+		err       error
+	)
+
+	n, err = protoutil.UInt64Marshal(netInfoCurEpochFNum, buf[offset:], i.curEpoch)
+	if err != nil {
+		return nil, err
+	}
+
+	offset += n
+
+	_, err = protoutil.UInt64Marshal(netInfoMagicNumFNum, buf[offset:], i.magicNum)
+	if err != nil {
+		return nil, err
+	}
+
+	return buf, nil
+}
+
+func (i *NetworkInfo) StableSize() (size int) {
+	if i == nil {
+		return 0
+	}
+
+	size += protoutil.UInt64Size(netInfoCurEpochFNum, i.curEpoch)
+	size += protoutil.UInt64Size(netInfoMagicNumFNum, i.magicNum)
+
+	return size
+}
+
+func (i *NetworkInfo) Unmarshal(data []byte) error {
+	m := new(netmap.NetworkInfo)
+	if err := proto.Unmarshal(data, m); err != nil {
+		return err
+	}
+
+	*i = *NetworkInfoFromGRPCMessage(m)
+
+	return nil
+}
+
+func (l *NetworkInfoRequestBody) StableMarshal(buf []byte) ([]byte, error) {
+	return nil, nil
+}
+
+func (l *NetworkInfoRequestBody) StableSize() (size int) {
+	return 0
+}
+
+const (
+	_ = iota
+	netInfoRespBodyNetInfoFNum
+)
+
+func (i *NetworkInfoResponseBody) StableMarshal(buf []byte) ([]byte, error) {
+	if i == nil {
+		return []byte{}, nil
+	}
+
+	if buf == nil {
+		buf = make([]byte, i.StableSize())
+	}
+
+	_, err := protoutil.NestedStructureMarshal(netInfoRespBodyNetInfoFNum, buf, i.netInfo)
+	if err != nil {
+		return nil, err
+	}
+
+	return buf, nil
+}
+
+func (i *NetworkInfoResponseBody) StableSize() (size int) {
+	if i == nil {
+		return 0
+	}
+
+	size += protoutil.NestedStructureSize(netInfoRespBodyNetInfoFNum, i.netInfo)
+
+	return size
+}
diff --git a/v2/netmap/marshal_test.go b/v2/netmap/marshal_test.go
index 63347ad..0acbd4b 100644
--- a/v2/netmap/marshal_test.go
+++ b/v2/netmap/marshal_test.go
@@ -111,6 +111,22 @@ func TestLocalNodeInfoResponseBody_StableMarshal(t *testing.T) {
 	})
 }
 
+func TestNetworkInfoResponseBody_StableMarshal(t *testing.T) {
+	from := generateNetworkInfoResponseBody()
+	transport := new(grpc.NetworkInfoResponse_Body)
+
+	t.Run("non empty", func(t *testing.T) {
+		wire, err := from.StableMarshal(nil)
+		require.NoError(t, err)
+
+		err = goproto.Unmarshal(wire, transport)
+		require.NoError(t, err)
+
+		to := netmap.NetworkInfoResponseBodyFromGRPCMessage(transport)
+		require.Equal(t, from, to)
+	})
+}
+
 func generateAttribute(k, v string) *netmap.Attribute {
 	attr := new(netmap.Attribute)
 	attr.SetKey(k)
@@ -213,3 +229,20 @@ func generateVersion(maj, min uint32) *refs.Version {
 
 	return version
 }
+
+func generateNetworkInfo() *netmap.NetworkInfo {
+	ni := new(netmap.NetworkInfo)
+	ni.SetCurrentEpoch(13)
+	ni.SetMagicNumber(666)
+
+	return ni
+}
+
+func generateNetworkInfoResponseBody() *netmap.NetworkInfoResponseBody {
+	ni := generateNetworkInfo()
+
+	r := new(netmap.NetworkInfoResponseBody)
+	r.SetNetworkInfo(ni)
+
+	return r
+}