diff --git a/openair2/COMMON/f1ap_messages_types.h b/openair2/COMMON/f1ap_messages_types.h
index f34b1dfea7..2224cf822f 100644
--- a/openair2/COMMON/f1ap_messages_types.h
+++ b/openair2/COMMON/f1ap_messages_types.h
@@ -190,7 +190,7 @@ typedef struct served_cells_to_activate_s {
   f1ap_plmn_t plmn;
   // NR Global Cell Id
   uint64_t nr_cellid;
-  /// NRPCI
+  /// NRPCI [int 0..1007]
   uint16_t nrpci;
   /// num SI messages per DU cell
   uint8_t num_SI;
diff --git a/openair2/F1AP/f1ap_cu_interface_management.c b/openair2/F1AP/f1ap_cu_interface_management.c
index afd2775863..e420ddf295 100644
--- a/openair2/F1AP/f1ap_cu_interface_management.c
+++ b/openair2/F1AP/f1ap_cu_interface_management.c
@@ -34,6 +34,8 @@
 #include "f1ap_encoder.h"
 #include "f1ap_itti_messaging.h"
 #include "f1ap_cu_interface_management.h"
+#include "f1ap_default_values.h"
+#include "lib/f1ap_interface_management.h"
 
 int CU_handle_RESET_ACKNOWLEDGE(instance_t instance, sctp_assoc_t assoc_id, uint32_t stream, F1AP_F1AP_PDU_t *pdu)
 {
diff --git a/openair2/F1AP/lib/CMakeLists.txt b/openair2/F1AP/lib/CMakeLists.txt
index 7e08cb18b1..cb8d8b9712 100644
--- a/openair2/F1AP/lib/CMakeLists.txt
+++ b/openair2/F1AP/lib/CMakeLists.txt
@@ -1,6 +1,7 @@
 add_library(f1ap_lib OBJECT
             f1ap_lib_common.c
             f1ap_rrc_message_transfer.c
+            f1ap_interface_management.c
 )
 target_link_libraries(f1ap_lib PRIVATE asn1_f1ap)
 target_include_directories(f1ap_lib PUBLIC
diff --git a/openair2/F1AP/lib/f1ap_interface_management.c b/openair2/F1AP/lib/f1ap_interface_management.c
new file mode 100644
index 0000000000..437fa4f36d
--- /dev/null
+++ b/openair2/F1AP/lib/f1ap_interface_management.c
@@ -0,0 +1,521 @@
+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (the "License"); you may not use this file
+ * except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+#include <string.h>
+
+#include "common/utils/assertions.h"
+#include "openair3/UTILS/conversions.h"
+#include "common/utils/oai_asn1.h"
+#include "common/utils/utils.h"
+
+#include "f1ap_interface_management.h"
+#include "f1ap_lib_common.h"
+#include "f1ap_lib_includes.h"
+#include "f1ap_messages_types.h"
+#include "f1ap_lib_extern.h"
+
+static const int nrb_lut[29] = {11,  18,  24,  25,  31,  32,  38,  51,  52,  65,  66,  78,  79,  93, 106,
+                                107, 121, 132, 133, 135, 160, 162, 189, 216, 217, 245, 264, 270, 273};
+
+static int to_NRNRB(int nrb)
+{
+  for (int i = 0; i < sizeofArray(nrb_lut); i++)
+    if (nrb_lut[i] == nrb)
+      return i;
+  AssertFatal(1 == 0, "nrb %d is not in the list of possible NRNRB\n", nrb);
+}
+
+static int read_slice_info(const F1AP_ServedPLMNs_Item_t *plmn, nssai_t *nssai, int max_nssai)
+{
+  if (plmn->iE_Extensions == NULL)
+    return 0;
+
+  const F1AP_ProtocolExtensionContainer_10696P34_t *p = (F1AP_ProtocolExtensionContainer_10696P34_t *)plmn->iE_Extensions;
+  if (p->list.count == 0)
+    return 0;
+
+  const F1AP_ServedPLMNs_ItemExtIEs_t *splmn = p->list.array[0];
+  DevAssert(splmn->id == F1AP_ProtocolIE_ID_id_TAISliceSupportList);
+  DevAssert(splmn->extensionValue.present == F1AP_ServedPLMNs_ItemExtIEs__extensionValue_PR_SliceSupportList);
+  const F1AP_SliceSupportList_t *ssl = &splmn->extensionValue.choice.SliceSupportList;
+  AssertFatal(ssl->list.count <= max_nssai, "cannot handle more than 16 slices\n");
+  for (int s = 0; s < ssl->list.count; ++s) {
+    const F1AP_SliceSupportItem_t *sl = ssl->list.array[s];
+    nssai_t *n = &nssai[s];
+    OCTET_STRING_TO_INT8(&sl->sNSSAI.sST, n->sst);
+    n->sd = 0xffffff;
+    if (sl->sNSSAI.sD != NULL)
+      OCTET_STRING_TO_INT24(sl->sNSSAI.sD, n->sd);
+  }
+
+  return ssl->list.count;
+}
+
+/**
+ * @brief F1AP Setup Request memory management
+ */
+static void free_f1ap_cell(const f1ap_served_cell_info_t *info, const f1ap_gnb_du_system_info_t *sys_info)
+{
+  if (sys_info) {
+    free(sys_info->mib);
+    free(sys_info->sib1);
+    free((void *)sys_info);
+  }
+  free(info->measurement_timing_config);
+  free(info->tac);
+}
+
+/**
+ * @brief Encoding of Served Cell Information (9.3.1.10 of 3GPP TS 38.473)
+ */
+static F1AP_Served_Cell_Information_t encode_served_cell_info(const f1ap_served_cell_info_t *c)
+{
+  F1AP_Served_Cell_Information_t scell_info = {0};
+  // NR CGI
+  MCC_MNC_TO_PLMNID(c->plmn.mcc, c->plmn.mnc, c->plmn.mnc_digit_length, &(scell_info.nRCGI.pLMN_Identity));
+  NR_CELL_ID_TO_BIT_STRING(c->nr_cellid, &(scell_info.nRCGI.nRCellIdentity));
+  // NR PCI
+  scell_info.nRPCI = c->nr_pci; // int 0..1007
+  // 5GS TAC
+  if (c->tac != NULL) {
+    uint32_t tac = htonl(*c->tac);
+    asn1cCalloc(scell_info.fiveGS_TAC, netOrder);
+    OCTET_STRING_fromBuf(netOrder, ((char *)&tac) + 1, 3);
+  }
+  // Served PLMNs
+  asn1cSequenceAdd(scell_info.servedPLMNs.list, F1AP_ServedPLMNs_Item_t, servedPLMN_item);
+  MCC_MNC_TO_PLMNID(c->plmn.mcc, c->plmn.mnc, c->plmn.mnc_digit_length, &servedPLMN_item->pLMN_Identity);
+  // NR-Mode-Info
+  F1AP_NR_Mode_Info_t *nR_Mode_Info = &scell_info.nR_Mode_Info;
+  if (c->mode == F1AP_MODE_FDD) { // FDD
+    const f1ap_fdd_info_t *fdd = &c->fdd;
+    nR_Mode_Info->present = F1AP_NR_Mode_Info_PR_fDD;
+    asn1cCalloc(nR_Mode_Info->choice.fDD, fDD_Info);
+    /* FDD.1.1 UL NRFreqInfo ARFCN */
+    fDD_Info->uL_NRFreqInfo.nRARFCN = fdd->ul_freqinfo.arfcn;
+    /* FDD.1.3 freqBandListNr */
+    int ul_band = 1;
+    for (int j = 0; j < ul_band; j++) {
+      asn1cSequenceAdd(fDD_Info->uL_NRFreqInfo.freqBandListNr.list, F1AP_FreqBandNrItem_t, nr_freqBandNrItem);
+      /* FDD.1.3.1 freqBandIndicatorNr*/
+      nr_freqBandNrItem->freqBandIndicatorNr = fdd->ul_freqinfo.band;
+    }
+    /* FDD.2.1 DL NRFreqInfo ARFCN */
+    fDD_Info->dL_NRFreqInfo.nRARFCN = fdd->dl_freqinfo.arfcn;
+    /* FDD.2.3 freqBandListNr */
+    int dl_bands = 1;
+    for (int j = 0; j < dl_bands; j++) {
+      asn1cSequenceAdd(fDD_Info->dL_NRFreqInfo.freqBandListNr.list, F1AP_FreqBandNrItem_t, nr_freqBandNrItem);
+      /* FDD.2.3.1 freqBandIndicatorNr*/
+      nr_freqBandNrItem->freqBandIndicatorNr = fdd->dl_freqinfo.band;
+    } // for FDD : DL freq_Bands
+    /* FDD.3 UL Transmission Bandwidth */
+    fDD_Info->uL_Transmission_Bandwidth.nRSCS = fdd->ul_tbw.scs;
+    fDD_Info->uL_Transmission_Bandwidth.nRNRB = to_NRNRB(fdd->ul_tbw.nrb);
+    /* FDD.4 DL Transmission Bandwidth */
+    fDD_Info->dL_Transmission_Bandwidth.nRSCS = fdd->dl_tbw.scs;
+    fDD_Info->dL_Transmission_Bandwidth.nRNRB = to_NRNRB(fdd->dl_tbw.nrb);
+  } else if (c->mode == F1AP_MODE_TDD) {
+    const f1ap_tdd_info_t *tdd = &c->tdd;
+    nR_Mode_Info->present = F1AP_NR_Mode_Info_PR_tDD;
+    asn1cCalloc(nR_Mode_Info->choice.tDD, tDD_Info);
+    /* TDD.1.1 nRFreqInfo ARFCN */
+    tDD_Info->nRFreqInfo.nRARFCN = tdd->freqinfo.arfcn;
+    /* TDD.1.3 freqBandListNr */
+    int bands = 1;
+    for (int j = 0; j < bands; j++) {
+      asn1cSequenceAdd(tDD_Info->nRFreqInfo.freqBandListNr.list, F1AP_FreqBandNrItem_t, nr_freqBandNrItem);
+      /* TDD.1.3.1 freqBandIndicatorNr*/
+      nr_freqBandNrItem->freqBandIndicatorNr = tdd->freqinfo.band;
+    }
+    /* TDD.2 transmission_Bandwidth */
+    tDD_Info->transmission_Bandwidth.nRSCS = tdd->tbw.scs;
+    tDD_Info->transmission_Bandwidth.nRNRB = to_NRNRB(tdd->tbw.nrb);
+  } else {
+    AssertFatal(false, "unknown duplex mode %d\n", c->mode);
+  }
+  // Measurement Timing Configuration
+  OCTET_STRING_fromBuf(&scell_info.measurementTimingConfiguration,
+                       (const char *)c->measurement_timing_config,
+                       c->measurement_timing_config_len);
+
+  return scell_info;
+}
+
+static bool decode_served_cell_info(const F1AP_Served_Cell_Information_t *in, f1ap_served_cell_info_t *info)
+{
+  AssertError(in != NULL, return false, "Input message pointer is NULL");
+  // 5GS TAC (O)
+  if (in->fiveGS_TAC) {
+    info->tac = malloc_or_fail(sizeof(*info->tac));
+    OCTET_STRING_TO_INT24(in->fiveGS_TAC, *info->tac);
+  }
+  // NR CGI (M)
+  TBCD_TO_MCC_MNC(&(in->nRCGI.pLMN_Identity), info->plmn.mcc, info->plmn.mnc, info->plmn.mnc_digit_length);
+  // NR Cell Identity (M)
+  BIT_STRING_TO_NR_CELL_IDENTITY(&in->nRCGI.nRCellIdentity, info->nr_cellid);
+  // NR PCI (M)
+  info->nr_pci = in->nRPCI;
+  // Served PLMNs (>= 1)
+  AssertError(in->servedPLMNs.list.count == 1, return false, "at least and only 1 PLMN must be present");
+  info->num_ssi = read_slice_info(in->servedPLMNs.list.array[0], info->nssai, 16);
+  // FDD Info
+  if (in->nR_Mode_Info.present == F1AP_NR_Mode_Info_PR_fDD) {
+    info->mode = F1AP_MODE_FDD;
+    f1ap_fdd_info_t *FDDs = &info->fdd;
+    F1AP_FDD_Info_t *fDD_Info = in->nR_Mode_Info.choice.fDD;
+    FDDs->ul_freqinfo.arfcn = fDD_Info->uL_NRFreqInfo.nRARFCN;
+    // Note: cannot handle more than one UL frequency band
+    int num_ulBands = fDD_Info->uL_NRFreqInfo.freqBandListNr.list.count;
+    AssertError(num_ulBands == 1, return false, "1 FDD UL frequency band must be present, more is not supported");
+    for (int f = 0; f < num_ulBands && f < 1; f++) {
+      F1AP_FreqBandNrItem_t *FreqItem = fDD_Info->uL_NRFreqInfo.freqBandListNr.list.array[f];
+      FDDs->ul_freqinfo.band = FreqItem->freqBandIndicatorNr;
+      AssertError(FreqItem->supportedSULBandList.list.count == 0, return false, "cannot handle FDD SUL bands");
+    }
+    // Note: cannot handle more than one DL frequency band
+    FDDs->dl_freqinfo.arfcn = fDD_Info->dL_NRFreqInfo.nRARFCN;
+    int num_dlBands = fDD_Info->dL_NRFreqInfo.freqBandListNr.list.count;
+    AssertError(num_dlBands == 1, return false, "1 FDD DL frequency band must be present, more is not supported");
+    for (int dlB = 0; dlB < num_dlBands && dlB < 1; dlB++) {
+      F1AP_FreqBandNrItem_t *FreqItem = fDD_Info->dL_NRFreqInfo.freqBandListNr.list.array[dlB];
+      FDDs->dl_freqinfo.band = FreqItem->freqBandIndicatorNr;
+      AssertError(FreqItem->supportedSULBandList.list.count == 0, return false, "cannot handle FDD SUL bands");
+    }
+    FDDs->ul_tbw.scs = fDD_Info->uL_Transmission_Bandwidth.nRSCS;
+    FDDs->ul_tbw.nrb = nrb_lut[fDD_Info->uL_Transmission_Bandwidth.nRNRB];
+    FDDs->dl_tbw.scs = fDD_Info->dL_Transmission_Bandwidth.nRSCS;
+    FDDs->dl_tbw.nrb = nrb_lut[fDD_Info->dL_Transmission_Bandwidth.nRNRB];
+  } else if (in->nR_Mode_Info.present == F1AP_NR_Mode_Info_PR_tDD) {
+    info->mode = F1AP_MODE_TDD;
+    f1ap_tdd_info_t *TDDs = &info->tdd;
+    F1AP_TDD_Info_t *tDD_Info = in->nR_Mode_Info.choice.tDD;
+    TDDs->freqinfo.arfcn = tDD_Info->nRFreqInfo.nRARFCN;
+    // Handle frequency bands
+    int num_tddBands = tDD_Info->nRFreqInfo.freqBandListNr.list.count;
+    AssertError(num_tddBands == 1, return false, "1 TDD DL frequency band must be present, more is not supported");
+    for (int f = 0; f < num_tddBands && f < 1; f++) {
+      struct F1AP_FreqBandNrItem *FreqItem = tDD_Info->nRFreqInfo.freqBandListNr.list.array[f];
+      TDDs->freqinfo.band = FreqItem->freqBandIndicatorNr;
+      AssertError(FreqItem->supportedSULBandList.list.count == 0, return false, "cannot handle TDD SUL bands");
+    }
+    TDDs->tbw.scs = tDD_Info->transmission_Bandwidth.nRSCS;
+    TDDs->tbw.nrb = nrb_lut[tDD_Info->transmission_Bandwidth.nRNRB];
+  } else {
+    AssertError(1 == 0, return false, "unknown or missing NR Mode info %d\n", in->nR_Mode_Info.present);
+  }
+  // MeasurementConfig (M)
+  AssertError(in->measurementTimingConfiguration.size > 0, return false, "measurementTimingConfigurationc size is 0");
+  info->measurement_timing_config = cp_octet_string(&in->measurementTimingConfiguration, &info->measurement_timing_config_len);
+  return true;
+}
+
+static F1AP_GNB_DU_System_Information_t *encode_system_info(const f1ap_gnb_du_system_info_t *sys_info)
+{
+  if (sys_info == NULL)
+    return NULL; /* optional: can be NULL */
+
+  F1AP_GNB_DU_System_Information_t *enc_sys_info = calloc_or_fail(1, sizeof(*enc_sys_info));
+
+  AssertFatal(sys_info->mib != NULL, "MIB must be present in DU sys info\n");
+  OCTET_STRING_fromBuf(&enc_sys_info->mIB_message, (const char *)sys_info->mib, sys_info->mib_length);
+
+  AssertFatal(sys_info->sib1 != NULL, "SIB1 must be present in DU sys info\n");
+  OCTET_STRING_fromBuf(&enc_sys_info->sIB1_message, (const char *)sys_info->sib1, sys_info->sib1_length);
+
+  return enc_sys_info;
+}
+
+static void decode_system_info(struct F1AP_GNB_DU_System_Information *DUsi, f1ap_gnb_du_system_info_t *sys_info)
+{
+  /* mib */
+  sys_info->mib = calloc_or_fail(DUsi->mIB_message.size, sizeof(*sys_info->mib));
+  memcpy(sys_info->mib, DUsi->mIB_message.buf, DUsi->mIB_message.size);
+  sys_info->mib_length = DUsi->mIB_message.size;
+  /* sib1 */
+  sys_info->sib1 = calloc_or_fail(DUsi->sIB1_message.size, sizeof(*sys_info->sib1));
+  memcpy(sys_info->sib1, DUsi->sIB1_message.buf, DUsi->sIB1_message.size);
+  sys_info->sib1_length = DUsi->sIB1_message.size;
+}
+
+/* ====================================
+ *          F1 SETUP REQUEST
+ * ==================================== */
+
+/**
+ * @brief F1 SETUP REQUEST encoding (9.2.1.4 of 3GPP TS 38.473)
+ *        gNB-DU → gNB-CU
+ */
+F1AP_F1AP_PDU_t *encode_f1ap_setup_request(const f1ap_setup_req_t *msg)
+{
+  F1AP_F1AP_PDU_t *pdu = calloc_or_fail(1, sizeof(*pdu));
+
+  /* Create */
+  /* 0. pdu Type */
+  pdu->present = F1AP_F1AP_PDU_PR_initiatingMessage;
+  asn1cCalloc(pdu->choice.initiatingMessage, initMsg);
+  initMsg->procedureCode = F1AP_ProcedureCode_id_F1Setup;
+  initMsg->criticality = F1AP_Criticality_reject;
+  initMsg->value.present = F1AP_InitiatingMessage__value_PR_F1SetupRequest;
+  F1AP_F1SetupRequest_t *f1Setup = &initMsg->value.choice.F1SetupRequest;
+  // Transaction ID (M)
+  asn1cSequenceAdd(f1Setup->protocolIEs.list, F1AP_F1SetupRequestIEs_t, ieC1);
+  ieC1->id = F1AP_ProtocolIE_ID_id_TransactionID;
+  ieC1->criticality = F1AP_Criticality_reject;
+  ieC1->value.present = F1AP_F1SetupRequestIEs__value_PR_TransactionID;
+  ieC1->value.choice.TransactionID = msg->transaction_id;
+  // gNB-DU ID (M)
+  asn1cSequenceAdd(f1Setup->protocolIEs.list, F1AP_F1SetupRequestIEs_t, ieC2);
+  ieC2->id = F1AP_ProtocolIE_ID_id_gNB_DU_ID;
+  ieC2->criticality = F1AP_Criticality_reject;
+  ieC2->value.present = F1AP_F1SetupRequestIEs__value_PR_GNB_DU_ID;
+  asn_int642INTEGER(&ieC2->value.choice.GNB_DU_ID, msg->gNB_DU_id);
+  // gNB-DU Name (O)
+  if (msg->gNB_DU_name) {
+    asn1cSequenceAdd(f1Setup->protocolIEs.list, F1AP_F1SetupRequestIEs_t, ieC3);
+    ieC3->id = F1AP_ProtocolIE_ID_id_gNB_DU_Name;
+    ieC3->criticality = F1AP_Criticality_ignore;
+    ieC3->value.present = F1AP_F1SetupRequestIEs__value_PR_GNB_DU_Name;
+    OCTET_STRING_fromBuf(&ieC3->value.choice.GNB_DU_Name, msg->gNB_DU_name, strlen(msg->gNB_DU_name));
+  }
+  /// gNB-DU Served Cells List (0..1)
+  asn1cSequenceAdd(f1Setup->protocolIEs.list, F1AP_F1SetupRequestIEs_t, ieCells);
+  ieCells->id = F1AP_ProtocolIE_ID_id_gNB_DU_Served_Cells_List;
+  ieCells->criticality = F1AP_Criticality_reject;
+  ieCells->value.present = F1AP_F1SetupRequestIEs__value_PR_GNB_DU_Served_Cells_List;
+  for (int i = 0; i < msg->num_cells_available; i++) {
+    // gNB-DU Served Cells Item (M)
+    const f1ap_served_cell_info_t *cell = &msg->cell[i].info;
+    const f1ap_gnb_du_system_info_t *sys_info = msg->cell[i].sys_info;
+    asn1cSequenceAdd(ieCells->value.choice.GNB_DU_Served_Cells_List.list, F1AP_GNB_DU_Served_Cells_ItemIEs_t, duServedCell);
+    duServedCell->id = F1AP_ProtocolIE_ID_id_GNB_DU_Served_Cells_Item;
+    duServedCell->criticality = F1AP_Criticality_reject;
+    duServedCell->value.present = F1AP_GNB_DU_Served_Cells_ItemIEs__value_PR_GNB_DU_Served_Cells_Item;
+    F1AP_GNB_DU_Served_Cells_Item_t *scell_item = &duServedCell->value.choice.GNB_DU_Served_Cells_Item;
+    scell_item->served_Cell_Information = encode_served_cell_info(cell);
+    scell_item->gNB_DU_System_Information = encode_system_info(sys_info);
+  }
+  // gNB-DU RRC version (M)
+  asn1cSequenceAdd(f1Setup->protocolIEs.list, F1AP_F1SetupRequestIEs_t, ie2);
+  ie2->id = F1AP_ProtocolIE_ID_id_GNB_DU_RRC_Version;
+  ie2->criticality = F1AP_Criticality_reject;
+  ie2->value.present = F1AP_F1SetupRequestIEs__value_PR_RRC_Version;
+  // RRC Version: "This IE is not used in this release."
+  // we put one bit for each byte in rrc_ver that is != 0
+  uint8_t bits = 0;
+  for (int i = 0; i < sizeofArray(msg->rrc_ver); ++i)
+    bits |= (msg->rrc_ver[i] != 0) << i;
+  BIT_STRING_t *bs = &ie2->value.choice.RRC_Version.latest_RRC_Version;
+  bs->buf = calloc_or_fail(1, sizeof(*bs->buf));
+  bs->buf[0] = bits;
+  bs->size = 1;
+  bs->bits_unused = 5;
+
+  F1AP_ProtocolExtensionContainer_10696P228_t *p = calloc_or_fail(1, sizeof(*p));
+  asn1cSequenceAdd(p->list, F1AP_RRC_Version_ExtIEs_t, rrcv_ext);
+  rrcv_ext->id = F1AP_ProtocolIE_ID_id_latest_RRC_Version_Enhanced;
+  rrcv_ext->criticality = F1AP_Criticality_ignore;
+  rrcv_ext->extensionValue.present = F1AP_RRC_Version_ExtIEs__extensionValue_PR_OCTET_STRING_SIZE_3_;
+  OCTET_STRING_t *os = &rrcv_ext->extensionValue.choice.OCTET_STRING_SIZE_3_;
+  os->size = sizeofArray(msg->rrc_ver);
+  os->buf = malloc_or_fail(sizeof(msg->rrc_ver));
+  for (int i = 0; i < sizeofArray(msg->rrc_ver); ++i)
+    os->buf[i] = msg->rrc_ver[i];
+  ie2->value.choice.RRC_Version.iE_Extensions = (struct F1AP_ProtocolExtensionContainer *)p;
+  return pdu;
+}
+
+/**
+ * @brief F1AP Setup Request decoding
+ */
+bool decode_f1ap_setup_request(const F1AP_F1AP_PDU_t *pdu, f1ap_setup_req_t *out)
+{
+  /* Check presence of message type */
+  _F1_EQ_CHECK_INT(pdu->present, F1AP_F1AP_PDU_PR_initiatingMessage);
+  AssertError(pdu->choice.initiatingMessage != NULL, return false, "pdu->choice.initiatingMessage is NULL");
+  _F1_EQ_CHECK_LONG(pdu->choice.initiatingMessage->procedureCode, F1AP_ProcedureCode_id_F1Setup);
+  _F1_EQ_CHECK_INT(pdu->choice.initiatingMessage->value.present, F1AP_InitiatingMessage__value_PR_F1SetupRequest);
+  /* Check presence of mandatory IEs */
+  F1AP_F1SetupRequest_t *in = &pdu->choice.initiatingMessage->value.choice.F1SetupRequest;
+  F1AP_F1SetupRequestIEs_t *ie;
+  F1AP_LIB_FIND_IE(F1AP_F1SetupRequestIEs_t, ie, in, F1AP_ProtocolIE_ID_id_TransactionID, true);
+  F1AP_LIB_FIND_IE(F1AP_F1SetupRequestIEs_t, ie, in, F1AP_ProtocolIE_ID_id_gNB_DU_ID, true);
+  F1AP_LIB_FIND_IE(F1AP_F1SetupRequestIEs_t, ie, in, F1AP_ProtocolIE_ID_id_GNB_DU_RRC_Version, true);
+  /* Loop over all IEs */
+  for (int i = 0; i < in->protocolIEs.list.count; i++) {
+    AssertError(in->protocolIEs.list.array[i] != NULL, return false, "in->protocolIEs.list.array[i] is NULL");
+    ie = in->protocolIEs.list.array[i];
+    switch (ie->id) {
+      case F1AP_ProtocolIE_ID_id_TransactionID:
+        // Transaction ID (M)
+        _F1_EQ_CHECK_INT(ie->value.present, F1AP_F1SetupRequestIEs__value_PR_TransactionID);
+        AssertError(ie->value.choice.TransactionID != -1, return false, "ie->value.choice.TransactionID is -1");
+        out->transaction_id = ie->value.choice.TransactionID;
+        break;
+      case F1AP_ProtocolIE_ID_id_gNB_DU_ID:
+        // gNB-DU ID (M)
+        _F1_EQ_CHECK_INT(ie->value.present, F1AP_F1SetupRequestIEs__value_PR_GNB_DU_ID);
+        asn_INTEGER2ulong(&ie->value.choice.GNB_DU_ID, &out->gNB_DU_id);
+        break;
+      case F1AP_ProtocolIE_ID_id_gNB_DU_Name: {
+        const F1AP_GNB_DU_Name_t *du_name = &ie->value.choice.GNB_DU_Name;
+        out->gNB_DU_name = calloc_or_fail(du_name->size + 1, sizeof(*out->gNB_DU_name));
+        strncpy(out->gNB_DU_name, (char *)du_name->buf, du_name->size);
+        break;
+      }
+      case F1AP_ProtocolIE_ID_id_gNB_DU_Served_Cells_List:
+        /* GNB_DU_Served_Cells_List */
+        out->num_cells_available = ie->value.choice.GNB_DU_Served_Cells_List.list.count;
+        AssertError(out->num_cells_available > 0, return false, "at least 1 cell must be present");
+        /* Loop over gNB-DU Served Cells Items */
+        for (int i = 0; i < out->num_cells_available; i++) {
+          F1AP_GNB_DU_Served_Cells_Item_t *served_cells_item =
+              &(((F1AP_GNB_DU_Served_Cells_ItemIEs_t *)ie->value.choice.GNB_DU_Served_Cells_List.list.array[i])
+                    ->value.choice.GNB_DU_Served_Cells_Item);
+          // gNB-DU System Information (O)
+          struct F1AP_GNB_DU_System_Information *DUsi = served_cells_item->gNB_DU_System_Information;
+          if (DUsi != NULL) {
+            // System Information
+            out->cell[i].sys_info = calloc_or_fail(1, sizeof(*out->cell[i].sys_info));
+            f1ap_gnb_du_system_info_t *sys_info = out->cell[i].sys_info;
+            /* mib */
+            sys_info->mib = cp_octet_string(&DUsi->mIB_message, &sys_info->mib_length);
+            /* sib1 */
+            sys_info->sib1 = cp_octet_string(&DUsi->sIB1_message, &sys_info->sib1_length);
+          }
+          /* Served Cell Information (M) */
+          if (!decode_served_cell_info(&served_cells_item->served_Cell_Information, &out->cell[i].info))
+            return false;
+        }
+        break;
+      case F1AP_ProtocolIE_ID_id_GNB_DU_RRC_Version:
+        /* gNB-DU RRC version (M) */
+        if (ie->value.choice.RRC_Version.iE_Extensions) {
+          F1AP_ProtocolExtensionContainer_10696P228_t *ext =
+              (F1AP_ProtocolExtensionContainer_10696P228_t *)ie->value.choice.RRC_Version.iE_Extensions;
+          if (ext->list.count > 0) {
+            F1AP_RRC_Version_ExtIEs_t *rrcext = ext->list.array[0];
+            OCTET_STRING_t *os = &rrcext->extensionValue.choice.OCTET_STRING_SIZE_3_;
+            DevAssert(os->size == sizeofArray(out->rrc_ver));
+            for (int i = 0; i < os->size; ++i)
+              out->rrc_ver[i] = os->buf[i];
+          }
+        }
+        break;
+      default:
+        AssertError(1 == 0, return false, "F1AP_ProtocolIE_ID_id %ld unknown\n", ie->id);
+        break;
+    }
+  }
+  return true;
+}
+
+static void copy_f1ap_served_cell_info(f1ap_served_cell_info_t *dest, const f1ap_served_cell_info_t *src) {
+  *dest = *src;
+  dest->mode = src->mode;
+  dest->tdd = src->tdd;
+  dest->fdd = src->fdd;
+  dest->plmn = src->plmn;
+  if (src->tac) {
+    dest->tac = malloc_or_fail(sizeof(*dest->tac));
+    *dest->tac = *src->tac;
+  }
+  if (src->measurement_timing_config_len) {
+    dest->measurement_timing_config = calloc_or_fail(src->measurement_timing_config_len, sizeof(*dest->measurement_timing_config));
+    memcpy(dest->measurement_timing_config, src->measurement_timing_config, src->measurement_timing_config_len);
+  }
+}
+
+/**
+ * @brief F1AP Setup Request deep copy
+ */
+f1ap_setup_req_t cp_f1ap_setup_request(const f1ap_setup_req_t *msg)
+{
+  f1ap_setup_req_t cp = {0};
+  /* gNB_DU_id */
+  cp.gNB_DU_id = msg->gNB_DU_id;
+  /* gNB_DU_name */
+  if (msg->gNB_DU_name != NULL)
+    cp.gNB_DU_name = strdup(msg->gNB_DU_name);
+  /* transaction_id */
+  cp.transaction_id = msg->transaction_id;
+  /* num_cells_available */
+  cp.num_cells_available = msg->num_cells_available;
+  for (int n = 0; n < msg->num_cells_available; n++) {
+    /* cell.info */
+    f1ap_served_cell_info_t *sci = &cp.cell[n].info;
+    const f1ap_served_cell_info_t *msg_sci = &msg->cell[n].info;
+    copy_f1ap_served_cell_info(sci, msg_sci);
+    /* cell.sys_info */
+    if (msg->cell[n].sys_info) {
+      f1ap_gnb_du_system_info_t *orig_sys_info = msg->cell[n].sys_info;
+      f1ap_gnb_du_system_info_t *copy_sys_info = calloc_or_fail(1, sizeof(*copy_sys_info));
+      cp.cell[n].sys_info = copy_sys_info;
+      if (orig_sys_info->mib_length > 0) {
+        copy_sys_info->mib = calloc_or_fail(orig_sys_info->mib_length, sizeof(*copy_sys_info->mib));
+        copy_sys_info->mib_length = orig_sys_info->mib_length;
+        memcpy(copy_sys_info->mib, orig_sys_info->mib, copy_sys_info->mib_length);
+      }
+      if (orig_sys_info->sib1_length > 0) {
+        copy_sys_info->sib1 = calloc_or_fail(orig_sys_info->sib1_length, sizeof(*copy_sys_info->sib1));
+        copy_sys_info->sib1_length = orig_sys_info->sib1_length;
+        memcpy(copy_sys_info->sib1, orig_sys_info->sib1, copy_sys_info->sib1_length);
+      }
+    }
+  }
+  for (int i = 0; i < sizeofArray(msg->rrc_ver); i++)
+    cp.rrc_ver[i] = msg->rrc_ver[i];
+  return cp;
+}
+
+/**
+ * @brief F1AP Setup Request equality check
+ */
+bool eq_f1ap_setup_request(const f1ap_setup_req_t *a, const f1ap_setup_req_t *b)
+{
+  _F1_EQ_CHECK_LONG(a->gNB_DU_id, b->gNB_DU_id);
+  _F1_EQ_CHECK_STR(a->gNB_DU_name, b->gNB_DU_name);
+  _F1_EQ_CHECK_LONG(a->transaction_id, b->transaction_id);
+  _F1_EQ_CHECK_INT(a->num_cells_available, b->num_cells_available);
+  for (int i = 0; i < a->num_cells_available; i++) {
+    if (!eq_f1ap_cell_info(&a->cell[i].info, &b->cell[i].info))
+      return false;
+    if (!eq_f1ap_sys_info(a->cell[i].sys_info, b->cell[i].sys_info))
+      return false;
+  }
+  _F1_EQ_CHECK_LONG(sizeofArray(a->rrc_ver), sizeofArray(b->rrc_ver));
+  for (int i = 0; i < sizeofArray(a->rrc_ver); i++) {
+    _F1_EQ_CHECK_INT(a->rrc_ver[i], b->rrc_ver[i]);
+  }
+  return true;
+}
+
+/**
+ * @brief F1AP Setup Request memory management
+ */
+void free_f1ap_setup_request(const f1ap_setup_req_t *msg)
+{
+  DevAssert(msg != NULL);
+  free(msg->gNB_DU_name);
+  for (int i = 0; i < msg->num_cells_available; i++) {
+    free_f1ap_cell(&msg->cell[i].info, msg->cell[i].sys_info);
+  }
+}
diff --git a/openair2/F1AP/lib/f1ap_interface_management.h b/openair2/F1AP/lib/f1ap_interface_management.h
new file mode 100644
index 0000000000..6b196b9999
--- /dev/null
+++ b/openair2/F1AP/lib/f1ap_interface_management.h
@@ -0,0 +1,36 @@
+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (the "License"); you may not use this file
+ * except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+#ifndef F1AP_INTERFACE_MANAGEMENT_H_
+#define F1AP_INTERFACE_MANAGEMENT_H_
+
+#include <stdbool.h>
+#include "f1ap_messages_types.h"
+
+struct F1AP_F1AP_PDU;
+
+struct F1AP_F1AP_PDU *encode_f1ap_setup_request(const f1ap_setup_req_t *msg);
+bool decode_f1ap_setup_request(const struct F1AP_F1AP_PDU *pdu, f1ap_setup_req_t *out);
+f1ap_setup_req_t cp_f1ap_setup_request(const f1ap_setup_req_t *msg);
+bool eq_f1ap_setup_request(const f1ap_setup_req_t *a, const f1ap_setup_req_t *b);
+void free_f1ap_setup_request(const f1ap_setup_req_t *msg);
+
+#endif /* F1AP_INTERFACE_MANAGEMENT_H_ */
diff --git a/openair2/F1AP/lib/f1ap_lib_common.c b/openair2/F1AP/lib/f1ap_lib_common.c
index a7d47c990f..edf48f426c 100644
--- a/openair2/F1AP/lib/f1ap_lib_common.c
+++ b/openair2/F1AP/lib/f1ap_lib_common.c
@@ -23,7 +23,7 @@
 #include "f1ap_messages_types.h"
 
 #include "OCTET_STRING.h"
-
+#include "common/utils/utils.h"
 #include "common/utils/assertions.h"
 #include "common/utils/utils.h"
 
@@ -35,6 +35,79 @@ bool eq_f1ap_plmn(const f1ap_plmn_t *a, const f1ap_plmn_t *b)
   return true;
 }
 
+bool eq_f1ap_freq_info(const f1ap_nr_frequency_info_t *a, const f1ap_nr_frequency_info_t *b)
+{
+  if (a->arfcn != b->arfcn)
+    return false;
+  if (a->band != b->band)
+    return false;
+  return true;
+}
+
+bool eq_f1ap_tx_bandwidth(const f1ap_transmission_bandwidth_t *a, const f1ap_transmission_bandwidth_t *b)
+{
+  if (a->nrb != b->nrb)
+    return false;
+  if (a->scs != b->scs)
+    return false;
+  return true;
+}
+
+bool eq_f1ap_cell_info(const f1ap_served_cell_info_t *a, const f1ap_served_cell_info_t *b)
+{
+  if (a->nr_cellid != b->nr_cellid)
+    return false;
+  if (a->nr_pci != b->nr_pci)
+    return false;
+  if (*a->tac != *b->tac)
+    return false;
+  if (a->mode != b->mode)
+    return false;
+  if (a->mode == F1AP_MODE_TDD) {
+    /* TDD */
+    if (!eq_f1ap_tx_bandwidth(&a->tdd.tbw, &b->tdd.tbw))
+      return false;
+    if (!eq_f1ap_freq_info(&a->tdd.freqinfo, &b->tdd.freqinfo))
+      return false;
+  } else if (a->mode == F1AP_MODE_FDD) {
+    /* FDD */
+    if (!eq_f1ap_tx_bandwidth(&a->fdd.dl_tbw, &b->fdd.dl_tbw))
+      return false;
+    if (!eq_f1ap_freq_info(&a->fdd.dl_freqinfo, &b->fdd.dl_freqinfo))
+      return false;
+    if (!eq_f1ap_tx_bandwidth(&a->fdd.ul_tbw, &b->fdd.ul_tbw))
+      return false;
+    if (!eq_f1ap_freq_info(&a->fdd.ul_freqinfo, &b->fdd.ul_freqinfo))
+      return false;
+  }
+  if (a->measurement_timing_config_len != b->measurement_timing_config_len)
+    return false;
+  if (*a->measurement_timing_config != *b->measurement_timing_config)
+    return false;
+  if (!eq_f1ap_plmn(&a->plmn, &b->plmn))
+    return false;
+  return true;
+}
+
+bool eq_f1ap_sys_info(const f1ap_gnb_du_system_info_t *a, const f1ap_gnb_du_system_info_t *b)
+{
+  /* MIB */
+  if (a->mib_length != b->mib_length)
+    return false;
+  for (int i = 0; i < a->mib_length; i++) {
+      if (a->mib[i] != b->mib[i])
+          return false;
+  }
+  /* SIB1 */
+  if (a->sib1_length != b->sib1_length)
+    return false;
+  for (int i = 0; i < a->sib1_length; i++) {
+      if (a->sib1[i] != b->sib1[i])
+          return false;
+  }
+  return true;
+}
+
 uint8_t *cp_octet_string(const OCTET_STRING_t *os, int *len)
 {
   uint8_t *buf = calloc_or_fail(os->size, sizeof(*buf));
diff --git a/openair2/F1AP/lib/f1ap_lib_common.h b/openair2/F1AP/lib/f1ap_lib_common.h
index 97e4f7eac4..2380a2da87 100644
--- a/openair2/F1AP/lib/f1ap_lib_common.h
+++ b/openair2/F1AP/lib/f1ap_lib_common.h
@@ -25,6 +25,7 @@
 #include <stdbool.h>
 #include <stdint.h>
 #include <stdio.h>
+#include "openair3/UTILS/conversions.h"
 
 #ifdef ENABLE_TESTS
   #define PRINT_ERROR(...) fprintf(stderr, ##__VA_ARGS__)
@@ -69,6 +70,14 @@
 
 struct f1ap_plmn_t;
 bool eq_f1ap_plmn(const struct f1ap_plmn_t *a, const struct f1ap_plmn_t *b);
+struct f1ap_served_cell_info_t;
+bool eq_f1ap_cell_info(const struct f1ap_served_cell_info_t *a, const struct f1ap_served_cell_info_t *b);
+struct f1ap_gnb_du_system_info_t;
+bool eq_f1ap_sys_info(const struct f1ap_gnb_du_system_info_t *a, const struct f1ap_gnb_du_system_info_t *b);
+struct f1ap_nr_frequency_info_t;
+bool eq_f1ap_freq_info(const struct f1ap_nr_frequency_info_t *a, const struct f1ap_nr_frequency_info_t *b);
+struct f1ap_transmission_bandwidth_t;
+bool eq_f1ap_tx_bandwidth(const struct f1ap_transmission_bandwidth_t *a, const struct f1ap_transmission_bandwidth_t *b);
 
 struct OCTET_STRING;
 uint8_t *cp_octet_string(const struct OCTET_STRING *os, int *len);
diff --git a/openair2/F1AP/lib/f1ap_lib_includes.h b/openair2/F1AP/lib/f1ap_lib_includes.h
index e9ebeab266..0e5ace104d 100644
--- a/openair2/F1AP/lib/f1ap_lib_includes.h
+++ b/openair2/F1AP/lib/f1ap_lib_includes.h
@@ -27,5 +27,15 @@
 #include "F1AP_InitiatingMessage.h"
 #include "F1AP_NRCellIdentity.h"
 #include "F1AP_ProtocolIE-Field.h"
+#include "F1AP_ServedPLMNs-Item.h"
+#include "F1AP_ProtocolExtensionContainer.h"
+#include "F1AP_ProtocolExtensionField.h"
+#include "F1AP_ProtocolIE-Field.h"
+#include "F1AP_SliceSupportItem.h"
+#include "F1AP_NR-Mode-Info.h"
+#include "F1AP_GNB-DU-System-Information.h"
+#include "F1AP_FDD-Info.h"
+#include "F1AP_TDD-Info.h"
+#include "F1AP_FreqBandNrItem.h"
 
 #endif /* F1AP_LIB_INCLUDES_H_ */