diff --git a/srsenb/hdr/stack/rrc/rrc_config.h b/srsenb/hdr/stack/rrc/rrc_config.h
index aa402b37b..b6feefe1a 100644
--- a/srsenb/hdr/stack/rrc/rrc_config.h
+++ b/srsenb/hdr/stack/rrc/rrc_config.h
@@ -76,12 +76,12 @@ struct rrc_cfg_t {
   bool                                                                                    meas_cfg_present = false;
   srsran_cell_t                                                                           cell;
   cell_list_t                                                                             cell_list;
-  uint32_t  num_nr_cells = 0; /// number of configured NR cells (used to configure RF)
-  uint32_t  max_mac_dl_kos;
-  uint32_t  max_mac_ul_kos;
-  uint32_t  rlf_release_timer_ms;
-  srb_cfg_t srb1_cfg;
-  srb_cfg_t srb2_cfg;
+  uint32_t       num_nr_cells = 0; /// number of configured NR cells (used to configure RF)
+  uint32_t       max_mac_dl_kos;
+  uint32_t       max_mac_ul_kos;
+  uint32_t       rlf_release_timer_ms;
+  srb_cfg_t      srb1_cfg;
+  srb_cfg_t      srb2_cfg;
   rrc_endc_cfg_t endc_cfg;
 };
 
diff --git a/srsenb/rb.conf.example b/srsenb/rb.conf.example
index 3203c2fe2..dc19c63f3 100644
--- a/srsenb/rb.conf.example
+++ b/srsenb/rb.conf.example
@@ -5,17 +5,16 @@
 // srb1_config = {
 //   rlc_config = {
 //     ul_am = {
+//       sn_field_len = 12;
 //       t_poll_retx = 45;
 //       poll_pdu = -1;
 //       poll_byte = -1;
 //       max_retx_thresh = 4;
 //     };
 //     dl_am = {
-//       t_reordering = 35;
-//       t_status_prohibit = 0;
-//     };
-//     enb_specific = {
-//      dl_max_retx_thresh = 32;
+//       sn_field_len = 12;
+//       t_reassembly = 50;
+//       t_status_prohibit = 50;
 //     };
 //   };
 // }
@@ -23,6 +22,7 @@
 // srb2_config = {
 //   rlc_config = {
 //     ul_am = {
+//       sn_field_len = 12;
 //       t_poll_retx = 45;
 //       poll_pdu = -1;
 //       poll_byte = -1;
@@ -32,9 +32,6 @@
 //       t_reordering = 35;
 //       t_status_prohibit = 0;
 //     };
-//     enb_specific = {
-//      dl_max_retx_thresh = 32;
-//     };
 //   };
 // }
 
diff --git a/srsenb/src/enb_cfg_parser.cc b/srsenb/src/enb_cfg_parser.cc
index 8fd77c89d..d531b1019 100644
--- a/srsenb/src/enb_cfg_parser.cc
+++ b/srsenb/src/enb_cfg_parser.cc
@@ -635,6 +635,71 @@ int field_qci::parse(libconfig::Setting& root)
   return 0;
 }
 
+int field_5g_srb::parse(libconfig::Setting& root)
+{
+  // Parse RLC AM section
+  asn1::rrc_nr::rlc_cfg_c* rlc_cfg = &cfg.rlc_cfg;
+  if (root.exists("ul_am") && root.exists("dl_am")) {
+    rlc_cfg->set_am();
+    cfg.present = true;
+  }
+
+  // RLC-UM Should not exist section
+  if (root.exists("ul_um") || root.exists("dl_um")) {
+    ERROR("Error SRBs must be AM.");
+    return SRSRAN_ERROR;
+  }
+
+  // Parse RLC-AM section
+  if (root.exists("ul_am")) {
+    asn1::rrc_nr::ul_am_rlc_s& ul_am_rlc = rlc_cfg->am().ul_am_rlc;
+
+    field_asn1_enum_number<asn1::rrc_nr::t_poll_retx_e> t_poll_retx("t_poll_retx", &ul_am_rlc.t_poll_retx);
+    if (t_poll_retx.parse(root["ul_am"])) {
+      ERROR("Error can't find t_poll_retx in section ul_am");
+      return SRSRAN_ERROR;
+    }
+
+    field_asn1_enum_number<asn1::rrc_nr::poll_pdu_e> poll_pdu("poll_pdu", &ul_am_rlc.poll_pdu);
+    if (poll_pdu.parse(root["ul_am"])) {
+      ERROR("Error can't find poll_pdu in section ul_am");
+      return SRSRAN_ERROR;
+    }
+
+    field_asn1_enum_number<asn1::rrc_nr::poll_byte_e> poll_byte("poll_byte", &ul_am_rlc.poll_byte);
+    if (poll_byte.parse(root["ul_am"])) {
+      ERROR("Error can't find poll_byte in section ul_am");
+      return SRSRAN_ERROR;
+    }
+
+    field_asn1_enum_number<asn1::rrc_nr::ul_am_rlc_s::max_retx_thres_e_> max_retx_thresh("max_retx_thresh",
+                                                                                         &ul_am_rlc.max_retx_thres);
+    if (max_retx_thresh.parse(root["ul_am"])) {
+      ERROR("Error can't find max_retx_thresh in section ul_am");
+      return SRSRAN_ERROR;
+    }
+  }
+
+  if (root.exists("dl_am")) {
+    asn1::rrc_nr::dl_am_rlc_s& dl_am_rlc = rlc_cfg->am().dl_am_rlc;
+
+    field_asn1_enum_number<asn1::rrc_nr::t_reassembly_e> t_reassembly("t_reassembly", &dl_am_rlc.t_reassembly);
+    if (t_reassembly.parse(root["dl_am"])) {
+      ERROR("Error can't find t_reordering in section dl_am");
+      return SRSRAN_ERROR;
+    }
+
+    field_asn1_enum_number<asn1::rrc_nr::t_status_prohibit_e> t_status_prohibit("t_status_prohibit",
+                                                                                &dl_am_rlc.t_status_prohibit);
+    if (t_status_prohibit.parse(root["dl_am"])) {
+      ERROR("Error can't find t_status_prohibit in section dl_am");
+      return SRSRAN_ERROR;
+    }
+  }
+
+  return 0;
+}
+
 int field_five_qi::parse(libconfig::Setting& root)
 {
   uint32_t nof_five_qi = (uint32_t)root.getLength();
diff --git a/srsenb/src/enb_cfg_parser.h b/srsenb/src/enb_cfg_parser.h
index 10b19ed6f..d1f0ae0ae 100644
--- a/srsenb/src/enb_cfg_parser.h
+++ b/srsenb/src/enb_cfg_parser.h
@@ -193,6 +193,18 @@ private:
   std::map<uint32_t, rrc_cfg_qci_t>& cfg;
 };
 
+class field_5g_srb final : public parser::field_itf
+{
+public:
+  explicit field_5g_srb(srb_5g_cfg_t& cfg_) : cfg(cfg_) {}
+  const char* get_name() override { return "field_5g_srb"; }
+
+  int parse(Setting& root) override;
+
+private:
+  srb_5g_cfg_t& cfg;
+};
+
 class field_five_qi final : public parser::field_itf
 {
 public:
diff --git a/srsgnb/hdr/stack/rrc/rrc_nr_config.h b/srsgnb/hdr/stack/rrc/rrc_nr_config.h
index b4c7848f5..aedf3ad1c 100644
--- a/srsgnb/hdr/stack/rrc/rrc_nr_config.h
+++ b/srsgnb/hdr/stack/rrc/rrc_nr_config.h
@@ -45,6 +45,12 @@ struct rrc_cell_cfg_nr_t {
 
 typedef std::vector<rrc_cell_cfg_nr_t> rrc_cell_list_nr_t;
 
+struct srb_5g_cfg_t {
+  int                     enb_dl_max_retx_thres = -1;
+  bool                    present               = false;
+  asn1::rrc_nr::rlc_cfg_c rlc_cfg;
+};
+
 struct rrc_nr_cfg_five_qi_t {
   bool                     configured = false;
   asn1::rrc_nr::pdcp_cfg_s pdcp_cfg;