diff --git a/common/ran_context.h b/common/ran_context.h
index 85c22467f67932d2b09ab3ad3ca44c5c8cbfc6c0..c0b58d2af2cc79bc09b179245a1d3e132b278ad9 100644
--- a/common/ran_context.h
+++ b/common/ran_context.h
@@ -103,8 +103,6 @@ typedef struct {
   pthread_mutex_t ru_mutex;
   /// condition variable for signaling setup completion of an RU
   pthread_cond_t ru_cond;
-  
-  struct cudu_params_s cudu;
 } RAN_CONTEXT_t;
 
 
diff --git a/openair2/ENB_APP/enb_config.c b/openair2/ENB_APP/enb_config.c
index 872a5ff3581619fb75e2695874b82ca955bc0692..c9e67a7eceb952e05879a7bdd9b0f3dfa0f9e76d 100644
--- a/openair2/ENB_APP/enb_config.c
+++ b/openair2/ENB_APP/enb_config.c
@@ -416,132 +416,6 @@ void RCconfig_macrlc(int macrlc_has_f1[MAX_MAC_INST]) {
 }
 
 
-void RCconfig_cudu() {
-  int               j;
-  char 		    *transport_type;
-  char 		    *du_type;
-  char 		    *balancing;
-  
-  
-   
-  pthread_t myid = pthread_self();
-  printf("CONFIG my id is %u\n", myid);
-  
-  paramdef_t DU_Params[] = DUPARAMS_DESC;
-  paramdef_t CU_Params[] = CUPARAMS_DESC;
-  paramlist_def_t DU_ParamList = {CONFIG_STRING_DU_LIST,NULL,0};
-  paramlist_def_t CU_ParamList = {CONFIG_STRING_CU_LIST,NULL,0};
-  
-  config_getlist( &DU_ParamList,DU_Params,sizeof(DU_Params)/sizeof(paramdef_t), NULL);    
-  config_getlist( &CU_ParamList,CU_Params,sizeof(CU_Params)/sizeof(paramdef_t), NULL); 
-
-  paramdef_t CU_Bal[] = CU_BAL_DESC;
-  paramlist_def_t CU_BalList = {CONFIG_STRING_CU_BALANCING, NULL, 0}; 
-  config_get(&CU_Bal, sizeof(CU_Bal)/sizeof(paramdef_t),NULL);
-
-  //printf("%s\n", strdup(*(CU_Bal[0].strptr)));
-  
-  balancing = strdup(*(CU_Bal[0].strptr));
-  if (strcmp(balancing, "ALL") == 0)
-  {
-    RC.cudu.cu_balancing = CU_BALANCING_ALL;
-  }
-  else if (strcmp(balancing, "ROUND_ROBIN") == 0)
-  {
-    RC.cudu.cu_balancing = CU_BALANCING_ROUND_ROBIN;
-  }
-  else
-  {
-    RC.cudu.cu_balancing = atoi(balancing) - 1;
-  }
-	     
-  // DU Parameters
-  RC.cudu.local_du.du_interface = strdup(*(DU_ParamList.paramarray[0][DU_INTERFACE_F1U].strptr));
-  RC.cudu.local_du.du_ipv4_address = strdup(*(DU_ParamList.paramarray[0][DU_ADDRESS_F1U].strptr));
-  RC.cudu.local_du.du_port = *(DU_ParamList.paramarray[0][DU_PORT_F1U].iptr);
-  transport_type = strdup(*(DU_ParamList.paramarray[0][DU_TYPE_F1U].strptr));
-  
-  if (strcmp(transport_type, "TCP") == 0)
-  {
-    RC.cudu.local_du.tcp = 1;
-    RC.cudu.local_du.udp = 0;
-    RC.cudu.local_du.sctp = 0;
-  }
-  else if (strcmp(transport_type, "UDP") == 0)
-  {
-    RC.cudu.local_du.tcp = 0;
-    RC.cudu.local_du.udp = 1;
-    RC.cudu.local_du.sctp = 0;
-  }
-  else if (strcmp(transport_type, "SCTP") == 0)
-  {
-    RC.cudu.local_du.tcp = 0;
-    RC.cudu.local_du.udp = 0;
-    RC.cudu.local_du.sctp = 1;
-  }
-  else
-  {
-    RC.cudu.local_du.tcp = 1;
-    RC.cudu.local_du.udp = 0;
-    RC.cudu.local_du.sctp = 0;
-  }
-    
-  //CU Parameters
-  j =  CU_ParamList.numelt;
-  RC.cudu.serving_dus = j;
-  for (int k=0; k<j; k++)
-  {
-    RC.cudu.cu[k].cu_interface = strdup(*(CU_ParamList.paramarray[k][CU_INTERFACE_F1U].strptr));
-    RC.cudu.cu[k].cu_ipv4_address = strdup(*(CU_ParamList.paramarray[k][CU_ADDRESS_F1U].strptr));
-    RC.cudu.cu[k].cu_port = *(CU_ParamList.paramarray[k][CU_PORT_F1U].iptr);
-    RC.cudu.cu[k].cu_id = k;
-    du_type = strdup(*(CU_ParamList.paramarray[k][DU_TECH].strptr));
-    transport_type = strdup(*(CU_ParamList.paramarray[k][CU_TYPE_F1U].strptr));
-    if (strcmp(transport_type, "TCP") == 0)
-    {
-      RC.cudu.cu[k].tcp = 1;
-      RC.cudu.cu[k].udp = 0;
-      RC.cudu.cu[k].sctp = 0;
-    }
-    else if (strcmp(transport_type, "UDP") == 0)
-    {
-      RC.cudu.cu[k].tcp = 0;
-      RC.cudu.cu[k].udp = 1;
-      RC.cudu.cu[k].sctp = 0;
-    }
-    else if (strcmp(transport_type, "SCTP") == 0)
-    {
-      RC.cudu.cu[k].tcp = 0;
-      RC.cudu.cu[k].udp = 0;
-      RC.cudu.cu[k].sctp = 1;
-    }
-    else
-    {
-      RC.cudu.cu[k].tcp = 1;
-      RC.cudu.cu[k].udp = 0;
-      RC.cudu.cu[k].sctp = 0;
-    }
-    if (strcmp(du_type, "LTE") == 0)
-    {
-      RC.cudu.cu[k].du_type = DU_TYPE_LTE;
-    }
-    else if (strcmp(du_type, "WiFi") == 0)
-    {
-      RC.cudu.cu[k].du_type = DU_TYPE_WIFI;
-    }
-    else
-    {
-      RC.cudu.cu[k].du_type = DU_TYPE_LTE;
-    }
-  }
- 
-}
-
-cudu_params_t *get_cudu_config()
-{
-    return &(RC.cudu);
-}
-	       
 int RCconfig_RRC(uint32_t i, eNB_RRC_INST *rrc) {
 
   int               num_enbs                      = 0;
@@ -2828,8 +2702,6 @@ void RCConfig(void) {
   
   char aprefix[MAX_OPTNAME_SIZE*2 + 8];  
   
-  //  RCconfig_cudu();
-
 /* get global parameters, defined outside any section in the config file */
  
   printf("Getting ENBSParams\n");
diff --git a/openair2/ENB_APP/enb_config.h b/openair2/ENB_APP/enb_config.h
index cdca8bd2405fe0fb8e3775664f99444b2878770f..715ef4448379b36a0266e1ae66c5ecd413356780 100644
--- a/openair2/ENB_APP/enb_config.h
+++ b/openair2/ENB_APP/enb_config.h
@@ -82,37 +82,16 @@ typedef struct mme_ip_address_s {
 
 
 
-typedef struct du_interfaces {
-  char *du_interface;
-  char *du_ipv4_address;
-  uint16_t du_port;
-
-  
-  unsigned tcp:1;
-  unsigned udp:1;
-  unsigned sctp:1;
-  
-}du_interfaces_t;
-
-typedef struct cu_interfaces {
-  char *cu_interface;
-  char *cu_ipv4_address;
-  uint16_t cu_port;
-  uint8_t  du_type;
-  uint8_t  cu_id;
-  
-  unsigned tcp:1;
-  unsigned udp:1;
-  unsigned sctp:1;
-  
-}cu_interfaces_t;
-
-typedef struct cudu_params_s {
-  du_interfaces_t local_du;
-  cu_interfaces_t cu[MAX_DU];
-  uint8_t 	  serving_dus;
-  uint8_t 	  cu_balancing;
-}cudu_params_t;
+typedef struct du_params {
+  const char   *remote_ipv4_address;
+  const int16_t remote_port;
+} du_params_t;
+
+typedef struct cu_params {
+  const char    *local_interface;
+  const char    *local_ipv4_address;
+  const uint16_t local_port;
+} cu_params_t;
 
 typedef struct ru_config_s {
   // indicates if local or remote rf is used (1 == LOCAL)
@@ -145,11 +124,7 @@ void                          ru_config_display(void);
 
 int RCconfig_RRC(uint32_t i, eNB_RRC_INST *rrc);
 int RCconfig_S1(MessageDef *msg_p, uint32_t i);
-int RCconfig_DU_F1(MessageDef *msg_p, uint32_t i);
-int RCconfig_CU_F1(uint32_t i);
 
-void RCconfig_cudu(void);
-cudu_params_t *get_cudu_config(void);
 void read_config_and_init(void);
 int RCconfig_X2(MessageDef *msg_p, uint32_t i);
 
diff --git a/openair2/LAYER2/PROTO_AGENT/proto_agent.c b/openair2/LAYER2/PROTO_AGENT/proto_agent.c
index fd809d5f9a4aabac6137d069de5c753f64ab56af..e7985003579e2ea3e3227d8ce4fc700caca189dd 100644
--- a/openair2/LAYER2/PROTO_AGENT/proto_agent.c
+++ b/openair2/LAYER2/PROTO_AGENT/proto_agent.c
@@ -45,251 +45,84 @@
 proto_agent_instance_t proto_agent[MAX_DU];
 proto_agent_instance_t proto_server[MAX_DU];
 
-char in_ip[40];
-static uint16_t in_port;
-char local_cache[40];
-
-void *send_thread(void *args);
-//void *receive_thread(void *args);
 pthread_t new_thread(void *(*f)(void *), void *b);
-pthread_t cu_thread[MAX_DU], du_thread;
+
 Protocol__FlexsplitMessage *proto_agent_timeout_fsp(void* args);
 
-mod_id_t client_mod[MAX_DU], server_mod;
 proto_agent_async_channel_t *client_channel[MAX_DU], *server_channel;
-proto_recv_t client_info[MAX_DU];
 
 #define TEST_MOD 0
 
-uint8_t tcp = 0;
-uint8_t udp = 0;
-uint8_t sctp = 0;
-char *link_type = NULL;
-
-
 #define ECHO
 
-/* Thread continuously listening for incomming packets */
-/*
-void *receive_thread(void *args) {
-
-  proto_agent_instance_t         *d = args;
-  void                  *data;
-  int                   size;
-  int                   priority;
-  err_code_t             err_code = 0;
-
-  Protocol__FlexsplitMessage *msg;
-
-  while (1) {
-    if (proto_agent_msg_recv(d->enb_id, PROTO_AGENT_DEFAULT, &data, &size, &priority)) {
-      err_code = PROTOCOL__FLEXSPLIT_ERR__MSG_ENQUEUING;
-      goto error;
-    }
-
-    LOG_D(PROTO_AGENT, "Received message with size %d and priority %d, calling message handle\n", size, priority);
-
-    msg=proto_agent_handle_message(d->enb_id, data, size);
-
-    if (msg == NULL)
-    {
-        LOG_D(PROTO_AGENT, "msg to send back is NULL\n");
-    }
-    
-    if (msg != NULL){
-      if (proto_agent_msg_send(d->enb_id, PROTO_AGENT_DEFAULT, msg, size, priority)) {
-	err_code = PROTOCOL__FLEXSPLIT_ERR__MSG_ENQUEUING;
-	goto error;
-      }
-      LOG_D(PROTO_AGENT, "sent message with size %d\n", size);
-    }
-  }
-
-  return NULL;
-
-error:
-  LOG_E(PROTO_AGENT, "receive_thread: error %d occured\n",err_code);
-  return NULL;
-}
-*/
-
-/* utility function to create a thread */
-/*
-pthread_t new_thread(void *(*f)(void *), void *b) {
-  pthread_t t;
-  pthread_attr_t att;
-
-  if (pthread_attr_init(&att)){ 
-    fprintf(stderr, "pthread_attr_init err\n"); 
-    exit(1); 
-  }
-  if (pthread_attr_setdetachstate(&att, PTHREAD_CREATE_DETACHED)) { 
-    fprintf(stderr, "pthread_attr_setdetachstate err\n"); 
-    exit(1); 
-  }
-  if (pthread_create(&t, &att, f, b)) { 
-    fprintf(stderr, "pthread_create err\n"); 
-    exit(1); 
-  }
-  if (pthread_attr_destroy(&att)) { 
-    fprintf(stderr, "pthread_attr_destroy err\n"); 
-    exit(1); 
-  }
-
-  return t;
-}
-*/
-/* Function to be called as a thread: 
-   it is calling the proto_agent_server with 
-   the appropriate arguments 
-*/
-
-void * proto_server_init(void *args)
-{
-   //printf( "Initializing server thread for listening connections\n");
-   mod_id_t mod_id = (mod_id_t) 0;
-   cudu_params_t* cudu = NULL;
-   cudu = get_cudu_config();
-   proto_server_start(mod_id, (const cudu_params_t*) cudu);
-   return NULL;
-}
-
 /*  Server side function; upon a new connection 
     reception, sends the hello packets
 */
-int proto_server_start(mod_id_t mod_id, const cudu_params_t* cudu){
-  
+int proto_server_start(mod_id_t mod_id, const cu_params_t *cu)
+{
   int channel_id;
-  char *peer_address = NULL;
-  
-  proto_server[mod_id].enb_id = mod_id;
+
+  DevAssert(cu->local_interface);
+  DevAssert(cu->local_ipv4_address);
+  DevAssert(cu->local_port > 1024); // "unprivileged" port
   
-  server_mod = mod_id;
+  proto_server[mod_id].mod_id = mod_id;
 
-  if (cudu->local_du.du_ipv4_address != NULL)
-  {
-    //LOG_D(PROTO_AGENT, "DU ADDRESS IS %s\n",cudu->local_du.du_ipv4_address);
-    peer_address = strdup(cudu->local_du.du_ipv4_address);
-    strcpy(in_ip, cudu->local_du.du_ipv4_address);
-  }
-  else
-  {
-    strcpy(in_ip, DEFAULT_PROTO_AGENT_IPv4_ADDRESS);
-    //LOG_D(PROTO_AGENT, "Cannot read DU address from conf file, setting the default (%s)\n", DEFAULT_PROTO_AGENT_IPv4_ADDRESS);
-  }
-  if (cudu->local_du.du_port != 0)
-    in_port = cudu->local_du.du_port;
-  else
-  {
-    in_port = DEFAULT_PROTO_AGENT_PORT;
-    //LOG_D(PROTO_AGENT, "Cannot read DU port from conf file, setting the default (%d)\n", DEFAULT_PROTO_AGENT_PORT);
-  }
+  /* Initialize the channel container */
 
-  if(cudu->local_du.tcp == 1)
-  {
-      tcp = 1;
-      link_type = strdup("TCP");
-      LOG_D(PROTO_AGENT, "Starting PROTO agent SERVER for module id %d on ipv4 %s, port %d over TCP\n",
-	proto_server[mod_id].enb_id,
-	in_ip,
-	in_port);
-  }
-  else if(cudu->local_du.udp  == 1)
-  {
-      udp = 1;      
-      link_type = strdup("UDP");
-      LOG_D(PROTO_AGENT, "Starting PROTO agent SERVER for module id %d on ipv4 %s, port %d over UDP\n",
-	proto_server[mod_id].enb_id,
-	in_ip,
-	in_port);
-  }
-  else if(cudu->local_du.sctp  == 1)
-  {
-      sctp = 1;
-      link_type = strdup("SCTP");
-      LOG_D(PROTO_AGENT, "Starting PROTO agent SERVER for module id %d on ipv4 %s, port %d over SCTP\n",
-	proto_server[mod_id].enb_id,
-	in_ip,
-	in_port);
-  }
-  else
-  {
-      tcp = 1;
-      link_type = strdup("TCP");
-      LOG_D(PROTO_AGENT, "Starting PROTO agent SERVER for module id %d on ipv4 %s, port %d over TCP\n",
-	proto_server[mod_id].enb_id,
-	in_ip,
-	in_port);
-    
-  }  
-  
-  /*
-   * Initialize the channel container
-   */
+  /* TODO only initialize the first time */
   proto_agent_init_channel_container();
 
   /*Create the async channel info*/
-  proto_agent_async_channel_t *channel_info = proto_server_async_channel_info(mod_id, in_ip, in_port, link_type, peer_address);
+  proto_agent_async_channel_t *channel_info;
+  channel_info = proto_server_async_channel_info(mod_id, cu->local_ipv4_address, cu->local_port);
   
   server_channel = channel_info;
 
-  /*Create a channel using the async channel info*/
+  /* Create a channel using the async channel info */
   channel_id = proto_agent_create_channel((void *) channel_info,
 					proto_agent_async_msg_send,
 					proto_agent_async_msg_recv,
 					proto_agent_async_release);
-
-  if (channel_id <= 0) {
-    goto error;
-  }
+  if (channel_id <= 0) goto error;
 
   proto_agent_channel_t *channel = proto_agent_get_channel(channel_id);
-  
-    
-  if (tcp == 1) channel->type = 0;
-  else if (udp == 1) channel->type = 1;
-  else if (sctp == 1) channel->type = 2;
-  else channel->type = 0;
-  
-  if (channel == NULL) {
-    goto error;
-  }
+  if (!channel) goto error;
+  proto_server[mod_id].channel = channel;
 
-  /*Register the channel for all underlying agents (use ENB_AGENT_MAX)*/
+  /* Register the channel for all underlying agents (use ENB_AGENT_MAX) */
   proto_agent_register_channel(mod_id, channel, ENB_AGENT_MAX);
 
   // Code for sending the HELLO/ECHO_REQ message once a connection is established
-  uint8_t *msg = NULL;
-  Protocol__FlexsplitMessage *init_msg=NULL;
-  int msg_flag = 0;
-
-  if (udp == 0)
-  {
-    // If the comm is not UDP, allow the server to send the first packet over the channel
-    //printf( "Proto agent Server: Calling the echo_request packet constructor\n");
-    msg_flag = proto_agent_echo_request(mod_id, NULL, &init_msg);
-    if (msg_flag != 0)
-    goto error;
-  
-    int msgsize = 0;
-    if (init_msg != NULL)
-      msg = proto_agent_pack_message(init_msg, &msgsize);
-
-    if (msg!= NULL)
-    {
-      LOG_D(PROTO_AGENT, "Server sending the message over the async channel\n");
-      proto_agent_async_msg_send((void *)msg, (int) msgsize, 1, (void *) channel_info);
-    }
-    /* After sending the message, wait for any replies; 
-      the server thread blocks until it reads any data 
-      over the channel
-    */
+  //uint8_t *msg = NULL;
+  //Protocol__FlexsplitMessage *init_msg=NULL;
+
+  //if (udp == 0)
+  //{
+  //  // If the comm is not UDP, allow the server to send the first packet over the channel
+  //  //printf( "Proto agent Server: Calling the echo_request packet constructor\n");
+  //  msg_flag = proto_agent_echo_request(mod_id, NULL, &init_msg);
+  //  if (msg_flag != 0)
+  //  goto error;
+  //
+  //  int msgsize = 0;
+  //  if (init_msg != NULL)
+  //    msg = proto_agent_pack_message(init_msg, &msgsize);
+
+  //  if (msg!= NULL)
+  //  {
+  //    LOG_D(PROTO_AGENT, "Server sending the message over the async channel\n");
+  //    proto_agent_async_msg_send((void *)msg, (int) msgsize, 1, (void *) channel_info);
+  //  }
+  //  /* After sending the message, wait for any replies;
+  //    the server thread blocks until it reads any data
+  //    over the channel
+  //  */
+
+  //}
+
+  proto_server[mod_id].recv_thread = new_thread(proto_server_receive, &proto_server[mod_id]);
 
-  }
-
-  
-  du_thread=new_thread(proto_server_receive, &proto_server[mod_id]);
-  LOG_D(PROTO_AGENT, "server ends with thread_id %lu\n",du_thread);
   return 0;
 
 error:
@@ -298,139 +131,67 @@ error:
 
 }
 
-int proto_agent_start(uint8_t enb_id, mod_id_t cu_id, uint8_t type_id, cudu_params_t *cudu){
-  
+int proto_agent_start(mod_id_t mod_id, const du_params_t *du)
+{
   int channel_id;
-  char *peer_address = NULL;
- // cudu_params_t *cudu = get_cudu_config();
-  
-  proto_agent[cu_id].enb_id = cu_id;
-  client_mod[cu_id] = cu_id; // FIXME: Allow for multiple types, now it will allow for DUs of different type per mod_id
-  
-  client_info[cu_id].type_id = type_id;
-  client_info[cu_id].mod_id = cu_id;
+
+  DevAssert(du->remote_ipv4_address);
+  DevAssert(du->remote_port > 1024); // "unprivileged" port
   
-  /* 
-   * check the configuration - Getting all the values from the config file
-   */ 
+  proto_agent[mod_id].mod_id = mod_id;
   
-  if (cudu->cu[cu_id].cu_ipv4_address != NULL)
-  {
-    strcpy(in_ip, cudu->cu[cu_id].cu_ipv4_address); 
-    peer_address = strdup(cudu->cu[cu_id].cu_ipv4_address);
-  }
-  else
-  {
-    strcpy(in_ip, DEFAULT_PROTO_AGENT_IPv4_ADDRESS);
-    LOG_D(PROTO_AGENT, "Cannot read DU address from conf file, setting the default (%s)\n", DEFAULT_PROTO_AGENT_IPv4_ADDRESS);
-  }
-  if (cudu->cu[cu_id].cu_port != 0)
-    in_port = cudu->cu[cu_id].cu_port;
-  else
-  {
-    in_port = DEFAULT_PROTO_AGENT_PORT;
-    LOG_D(PROTO_AGENT, "Cannot read DU port from conf file, setting the default (%d)\n", DEFAULT_PROTO_AGENT_PORT);
-  }
-
-  if(cudu->cu[cu_id].tcp == 1)
-  {
-      tcp = 1;
-      link_type = strdup("TCP");
-      LOG_D(PROTO_AGENT, "Starting PROTO agent client for module id %d on ipv4 %s, port %d over TCP\n",
-	proto_server[cu_id].enb_id,
-	in_ip,
-	in_port);
-  }
-  else if(cudu->cu[cu_id].udp == 1)
-  {
-      udp = 1;      
-      link_type = strdup("UDP");
-      LOG_D(PROTO_AGENT, "Starting PROTO agent client for module id %d on ipv4 %s, port %d over UDP\n",
-	proto_server[cu_id].enb_id,
-	in_ip,
-	in_port);
-  }
-  else if(cudu->cu[cu_id].sctp == 1)
-  {
-      sctp = 1;
-      link_type = strdup("SCTP");
-      LOG_D(PROTO_AGENT, "Starting PROTO agent client for module id %d on ipv4 %s, port %d over SCTP\n",
-	proto_server[cu_id].enb_id,
-	in_ip,
-	in_port);
-  }
-  else
-  {
-      tcp = 1;
-      link_type = strdup("TCP");
-      LOG_D(PROTO_AGENT, "Starting PROTO agent client for module id %d on ipv4 %s, port %d over TCP\n",
-	proto_server[cu_id].enb_id,
-	in_ip,
-	in_port);
-    
-  }  
-
-  /*
-   * Initialize the channel container
-   */
+  /* TODO only initialize the first time */
   proto_agent_init_channel_container();
 
   /*Create the async channel info*/
   
-  proto_agent_async_channel_t *channel_info = proto_agent_async_channel_info(cu_id, in_ip, in_port, link_type, peer_address);
-  client_channel[cu_id] = channel_info;
+  proto_agent_async_channel_t *channel_info = proto_agent_async_channel_info(mod_id, du->remote_ipv4_address, du->remote_port);
+  if (!channel_info) goto error;
+
   /*Create a channel using the async channel info*/
   channel_id = proto_agent_create_channel((void *) channel_info, 
 					proto_agent_async_msg_send, 
 					proto_agent_async_msg_recv,
 					proto_agent_async_release);
-  if (channel_id <= 0) {
-    goto error;
-  }
+  if (channel_id <= 0) goto error;
 
   proto_agent_channel_t *channel = proto_agent_get_channel(channel_id);
+  if (!channel) goto error;
+  proto_agent[mod_id].channel = channel;
 
-  if (channel == NULL) {
-    goto error;
-  }
-  
-  if (tcp == 1) channel->type = 0;
-  else if (udp == 1) channel->type = 1;
-  else if (sctp == 1) channel->type = 2;
-  else channel->type = 0;
-
-  /*Register the channel for all underlying agents (use ENB_AGENT_MAX)*/
-  proto_agent_register_channel(cu_id, channel, ENB_AGENT_MAX);
+  /* Register the channel for all underlying agents (use ENB_AGENT_MAX) */
+  proto_agent_register_channel(mod_id, channel, ENB_AGENT_MAX);
 
-  uint8_t *msg = NULL;
-  Protocol__FlexsplitMessage *init_msg=NULL;
-  int msg_flag;
+  //uint8_t *msg = NULL;
+  //Protocol__FlexsplitMessage *init_msg=NULL;
+  //int msg_flag;
   
   // In the case of UDP comm, start the echo request from the client side; the server thread should be blocked until it reads the SRC port of the 1st packet
-  if (udp == 1)
-  {
-    msg_flag = proto_agent_echo_request(cu_id, NULL, &init_msg);  
-
-
-
-    if (msg_flag != 0)
-      goto error;
-    
-    int msgsize = 0;
-    if (init_msg != NULL)
-      msg = proto_agent_pack_message(init_msg, &msgsize);
-
-    if (msg!= NULL)
-    {
-      LOG_D(PROTO_AGENT, "Client sending the ECHO_REQUEST message over the async channel\n");
-      proto_agent_async_msg_send((void *)msg, (int) msgsize, 1, (void *) channel_info);
-    }
-  }
+  //if (udp == 1)
+  //{
+  //  msg_flag = proto_agent_echo_request(cu_id, NULL, &init_msg);
+
+
+
+  //  if (msg_flag != 0)
+  //    goto error;
+  //
+  //  int msgsize = 0;
+  //  if (init_msg != NULL)
+  //    msg = proto_agent_pack_message(init_msg, &msgsize);
+
+  //  if (msg!= NULL)
+  //  {
+  //    LOG_D(PROTO_AGENT, "Client sending the ECHO_REQUEST message over the async channel\n");
+  //    proto_agent_async_msg_send((void *)msg, (int) msgsize, 1, (void *) channel_info);
+  //  }
+  //}
+  //
   /* After sending the message, wait for any replies; 
      the server thread blocks until it reads any data 
      over the channel
   */
-  cu_thread[cu_id]=new_thread(proto_client_receive, (void *) &client_info[cu_id]);
+  proto_agent[mod_id].recv_thread = new_thread(proto_client_receive, &proto_agent[mod_id]);
   return 0;
 
 error:
@@ -439,26 +200,26 @@ error:
 
 }
 
-void 
-proto_agent_send_hello(void)
-{
-  uint8_t *msg = NULL;
-  Protocol__FlexsplitMessage *init_msg=NULL;
-  int msg_flag = 0;
-
-  
-  //printf( "PDCP agent: Calling the HELLO packet constructor\n");
-  msg_flag = proto_agent_hello(proto_agent[TEST_MOD].enb_id, NULL, &init_msg);
-  
-  int msgsize = 0;
-  if (msg_flag == 0)
-  {
-    proto_agent_serialize_message(init_msg, &msg, &msgsize);
-  }
-  
-  LOG_D(PROTO_AGENT, "Agent sending the message over the async channel\n");
-  proto_agent_async_msg_send((void *)msg, (int) msgsize, 1, (void *) client_channel[TEST_MOD]);
-}
+//void
+//proto_agent_send_hello(void)
+//{
+//  uint8_t *msg = NULL;
+//  Protocol__FlexsplitMessage *init_msg=NULL;
+//  int msg_flag = 0;
+//
+//
+//  //printf( "PDCP agent: Calling the HELLO packet constructor\n");
+//  msg_flag = proto_agent_hello(proto_agent[TEST_MOD].mod_id, NULL, &init_msg);
+//
+//  int msgsize = 0;
+//  if (msg_flag == 0)
+//  {
+//    proto_agent_serialize_message(init_msg, &msg, &msgsize);
+//  }
+//
+//  LOG_D(PROTO_AGENT, "Agent sending the message over the async channel\n");
+//  proto_agent_async_msg_send((void *)msg, (int) msgsize, 1, (void *) client_channel[TEST_MOD]);
+//}
 
 
 void
@@ -543,7 +304,8 @@ proto_agent_send_pdcp_data_ind(const protocol_ctxt_t* const ctxt_pP, const srb_f
   args->sdu_p = malloc(sdu_sizeP);
   memcpy(args->sdu_p, sdu_pP->data, sdu_sizeP);
 
-  msg_flag = proto_agent_pdcp_data_ind(proto_server[server_mod].enb_id, (void *) args, &init_msg);
+  AssertFatal(0, "need mod_id here\n");
+  msg_flag = proto_agent_pdcp_data_ind(proto_server[0].mod_id, (void *) args, &init_msg);
   if (msg_flag != 0)
     goto error;
 
@@ -598,7 +360,7 @@ proto_server_receive(void *args)
 
     LOG_D(PROTO_AGENT, "Server side Received message with size %d and priority %d, calling message handle\n", size, priority);
 
-    msg=proto_agent_handle_message(d->enb_id, data, size);
+    msg=proto_agent_handle_message(d->mod_id, data, size);
 
     if (msg == NULL)
     {
@@ -631,9 +393,8 @@ error:
 void *
 proto_client_receive(void *args)
 {
-  
-  proto_recv_t*         recv = args;
-  mod_id_t 	      recv_mod = recv->mod_id;
+  AssertFatal(0, "check proto_client_receive\n");
+  mod_id_t 	      recv_mod = 0;
 
   LOG_D(PROTO_AGENT, "\n\nrecv mod is %u\n\n",recv_mod);  
   //proto_agent_instance_t         *d = &proto_agent[TEST_MOD];
@@ -692,19 +453,3 @@ error:
   return NULL;
   
 }
-
-
-uint8_t select_du(uint8_t max_dus)
-{
-    static uint8_t selected = 0;
-    if (selected < max_dus -1 )
-    {
-      selected++;
-    }
-    else
-    {
-      selected = 0;
-    }
-    return selected;
-}
-
diff --git a/openair2/LAYER2/PROTO_AGENT/proto_agent.h b/openair2/LAYER2/PROTO_AGENT/proto_agent.h
index 520a438aa73743eef24cd0f72ed9ad7a8a1c7a84..468016a2ecd8cab9243e8f99496c6cb9a7e37834 100644
--- a/openair2/LAYER2/PROTO_AGENT/proto_agent.h
+++ b/openair2/LAYER2/PROTO_AGENT/proto_agent.h
@@ -45,20 +45,13 @@ void * proto_server_init(void *args);
 void * proto_server_receive(void *args);
 void * proto_client_receive(void *args);
 
-int proto_agent_start(uint8_t enb_id, mod_id_t mod_id, uint8_t type_id, cudu_params_t *cudu);
-int proto_server_start(mod_id_t mod_id, const cudu_params_t* cudu);
+int proto_agent_start(mod_id_t mod_id, const du_params_t *du);
+int proto_server_start(mod_id_t mod_id, const cu_params_t* cu);
 
 int proto_agent_stop(mod_id_t mod_id);
 
 void *proto_agent_task(void *args);
 
-uint8_t select_du(uint8_t max_dus);
-typedef struct 
-{
-  mod_id_t mod_id;
-  uint8_t type_id;
-}proto_recv_t;
-
 void proto_agent_send_rlc_data_req(uint8_t mod_id, uint8_t type_id,
     const protocol_ctxt_t* const ctxt_pP, const srb_flag_t srb_flagP,
     const MBMS_flag_t MBMS_flagP, const rb_id_t rb_idP, const mui_t muiP,
diff --git a/openair2/LAYER2/PROTO_AGENT/proto_agent_async.c b/openair2/LAYER2/PROTO_AGENT/proto_agent_async.c
index 07c528da5bfc72a7228388234b4d0f80759243c2..0e206b71834690729c095bdef0bcfd73c347c355 100644
--- a/openair2/LAYER2/PROTO_AGENT/proto_agent_async.c
+++ b/openair2/LAYER2/PROTO_AGENT/proto_agent_async.c
@@ -34,61 +34,35 @@
 
 #include "common/utils/LOG/log.h"
 
-uint16_t proto_udp = 0;
-uint16_t proto_tcp = 0;
-uint16_t proto_sctp = 0;
-
-proto_agent_async_channel_t * proto_server_async_channel_info(mod_id_t mod_id, char *dst_ip, uint16_t dst_port, const char* type, const char *peer_addr) {
-
+proto_agent_async_channel_t *
+proto_server_async_channel_info(mod_id_t mod_id, const char *ip, uint16_t port)
+{
+  LOG_E(PROTO_AGENT, "does not bind to specific address at the moment, ignoring %s\n", ip);
   proto_agent_async_channel_t *channel;
-  channel = (proto_agent_async_channel_t *) malloc(sizeof(proto_agent_channel_t));
-
-  channel->port = dst_port;
-  channel->peer_addr = NULL;
+  channel = malloc(sizeof(proto_agent_channel_t));
   
   if (channel == NULL)
     goto error;
 
+  channel->port = port;
+  channel->peer_addr = NULL;
+
   channel->enb_id = mod_id;
-  /*Create a socket*/
-  if (strcmp(type, "TCP") == 0)
-  {
-    proto_tcp = 1;
-    printf("PROTO_AGENT: sTARTING TCP SERVER\n");
-    channel->link = new_link_server(dst_port);
-    channel->type = 0;
-  }
-  else if (strcmp(type, "UDP") == 0)
-  {
-    proto_udp = 1;
-    //channel->link = new_udp_link_server(dst_port);
-    channel->link = new_link_udp_server(dst_port);
-    channel->type = 1;
-    channel->peer_addr = peer_addr;
-  }
-  else if (strcmp(type, "SCTP") == 0)
-  {
-    proto_sctp = 1;
-    //channel->link = new_sctp_link_server(dst_port);
-    channel->link = new_link_sctp_server(dst_port);
-    channel->type = 2;
-  }
+  channel->link = new_link_udp_server(port);
   
   if (channel->link == NULL) goto error;
   
-   /* 
-   * create a message queue
-   */ 
-  
   channel->send_queue = new_message_queue();
   if (channel->send_queue == NULL) goto error;
   channel->receive_queue = new_message_queue();
   if (channel->receive_queue == NULL) goto error;
 
-   /* 
-   * create a link manager 
-   */  
-  channel->manager = create_link_manager(channel->send_queue, channel->receive_queue, channel->link, channel->type, channel->peer_addr, channel->port);
+  channel->manager = create_link_manager(channel->send_queue,
+                                         channel->receive_queue,
+                                         channel->link,
+                                         CHANNEL_UDP,
+                                         channel->peer_addr,
+                                         channel->port);
   if (channel->manager == NULL) goto error;
   
   return channel;
@@ -99,55 +73,34 @@ proto_agent_async_channel_t * proto_server_async_channel_info(mod_id_t mod_id, c
 }
 
 
-proto_agent_async_channel_t * proto_agent_async_channel_info(mod_id_t mod_id, char *dst_ip, uint16_t dst_port, const char* type, const char *peer_addr) {
-
+proto_agent_async_channel_t *
+proto_agent_async_channel_info(mod_id_t mod_id, const char *dst_ip, uint16_t dst_port)
+{
   proto_agent_async_channel_t *channel;
   channel = (proto_agent_async_channel_t *) malloc(sizeof(proto_agent_channel_t));
-  
-  channel->port = dst_port;
-  channel->peer_addr = NULL;
-  
+
   if (channel == NULL)
     goto error;
 
+  channel->port = dst_port;
+  channel->peer_addr = dst_ip;
+
   channel->enb_id = mod_id;
-  /*Create a socket*/
-  if (strcmp(type, "TCP") == 0)
-  {
-    proto_tcp = 1;
-    channel->link = new_link_client(dst_ip, dst_port);
-    channel->type = 0;
-  }
-  else if (strcmp(type, "UDP") == 0)
-  {
-    proto_udp = 1;
-    channel->link = new_link_udp_client(dst_ip, dst_port);
-    channel->type = 1;
-    channel->peer_addr = peer_addr;
-  }
-  else if (strcmp(type, "SCTP") == 0)
-  {
-    proto_sctp = 1;
-    channel->link = new_link_sctp_client(dst_ip, dst_port);;
-    channel->type = 2;
-  }
-  
+  channel->link = new_link_udp_client(channel->peer_addr, channel->port);
  
   if (channel->link == NULL) goto error;
   
-   /* 
-   * create a message queue
-   */ 
-  
   channel->send_queue = new_message_queue();
   if (channel->send_queue == NULL) goto error;
   channel->receive_queue = new_message_queue();
   if (channel->receive_queue == NULL) goto error;
   
-   /* 
-   * create a link manager 
-   */  
-  channel->manager = create_link_manager(channel->send_queue, channel->receive_queue, channel->link, channel->type, channel->peer_addr, channel->port);
+  channel->manager = create_link_manager(channel->send_queue,
+                                         channel->receive_queue,
+                                         channel->link,
+                                         CHANNEL_UDP,
+                                         channel->peer_addr,
+                                         channel->port);
   if (channel->manager == NULL) goto error;
   
   return channel;
@@ -163,19 +116,12 @@ int proto_agent_async_msg_send(void *data, int size, int priority, void *channel
   return message_put(channel->send_queue, data, size, priority);
 }
 
-int proto_agent_async_msg_recv(void **data, int *size, int *priority, void *channel_info) {
+int proto_agent_async_msg_recv(void **data, int *size, int *priority, void *channel_info)
+{
   proto_agent_async_channel_t *channel;
   channel = (proto_agent_async_channel_t *)channel_info;
 
-  if (channel == NULL)
-    return 0;   
-  else if (channel->type < 0)
-    return 0;
-  else if (channel->receive_queue == NULL)
-    return 0;  
-  else
-    return message_get(channel->receive_queue, data, size, priority);
-
+  return message_get(channel->receive_queue, data, size, priority);
 }
 
 void proto_agent_async_release(proto_agent_channel_t *channel) {
diff --git a/openair2/LAYER2/PROTO_AGENT/proto_agent_async.h b/openair2/LAYER2/PROTO_AGENT/proto_agent_async.h
index c7a72d298306fa612bf0c21df3c42f41454c147d..681fb83b1b853a531f8568901ab6468812a2984c 100644
--- a/openair2/LAYER2/PROTO_AGENT/proto_agent_async.h
+++ b/openair2/LAYER2/PROTO_AGENT/proto_agent_async.h
@@ -39,10 +39,9 @@
 
 #include "proto_agent_net_comm.h"
 
-typedef struct {
-  mod_id_t            enb_id;
-  uint16_t         type; // 0-> TCP, 1-> UDP, 2->SCTP
-  char 		  *peer_addr;
+typedef struct proto_agent_async_channel_s {
+  mod_id_t         enb_id;
+  const char      *peer_addr;
   int		   port;
   socket_link_t   *link;
   message_queue_t *send_queue;
@@ -50,8 +49,8 @@ typedef struct {
   link_manager_t  *manager;
 } proto_agent_async_channel_t;
 
-proto_agent_async_channel_t * proto_agent_async_channel_info(mod_id_t mod_id, char *dst_ip, uint16_t dst_port, const char* type, const char *peer_addr);
-proto_agent_async_channel_t * proto_server_async_channel_info(mod_id_t mod_id, char *dst_ip, uint16_t dst_port, const char* type, const char *peer_addr);
+proto_agent_async_channel_t * proto_agent_async_channel_info(mod_id_t mod_id, const char *dst_ip, uint16_t dst_port);
+proto_agent_async_channel_t * proto_server_async_channel_info(mod_id_t mod_id, const char *ip, uint16_t _port);
 
 int proto_agent_async_msg_send(void *data, int size, int priority, void *channel_info);
 
diff --git a/openair2/LAYER2/PROTO_AGENT/proto_agent_defs.h b/openair2/LAYER2/PROTO_AGENT/proto_agent_defs.h
index 2202390749031a24d065bb0c82b68f0acd5ebe66..0e0302002c774c15f9c619aa45851dbe75abff64 100644
--- a/openair2/LAYER2/PROTO_AGENT/proto_agent_defs.h
+++ b/openair2/LAYER2/PROTO_AGENT/proto_agent_defs.h
@@ -98,9 +98,9 @@ typedef enum {
 typedef uint8_t xid_t;  
 typedef uint8_t mod_id_t;  // module or enb id 
 typedef uint8_t lcid_t;
-typedef int32_t  err_code_t; 
-
+typedef int32_t err_code_t;
 
+#define CHANNEL_UDP 1
 
 typedef struct {
   /* general info */ 
@@ -113,12 +113,16 @@ typedef struct {
   uint32_t rx_msg[NUM_MAX_ENB];
   uint32_t tx_msg[NUM_MAX_ENB];
 
-}proto_agent_info_t;
+} proto_agent_info_t;
 
-typedef struct {
-  mod_id_t enb_id;
+/* forward declaration */
+struct proto_agent_channel_s;
+
+typedef struct proto_agent_instance_s {
+  mod_id_t    mod_id;
   proto_agent_info_t agent_info;
-  
-}proto_agent_instance_t;
+  struct proto_agent_channel_s *channel;
+  pthread_t   recv_thread;
+} proto_agent_instance_t;
 
 #endif 
diff --git a/openair2/LAYER2/PROTO_AGENT/proto_agent_net_comm.h b/openair2/LAYER2/PROTO_AGENT/proto_agent_net_comm.h
index b489c64416130b04c08bbf2b079aec7d6143da95..6647de6e1bc89346fe13cc5c52dd556d27377646 100644
--- a/openair2/LAYER2/PROTO_AGENT/proto_agent_net_comm.h
+++ b/openair2/LAYER2/PROTO_AGENT/proto_agent_net_comm.h
@@ -41,16 +41,18 @@
 #include "tree.h"
 #define ENB_AGENT_MAX 9
 
+/* forward declaration */
+struct proto_agent_async_channel_s;
+
 /*Channel related information used for Tx/Rx of protocol messages*/
 typedef struct proto_agent_channel_s {
   RB_ENTRY(proto_agent_channel_s) entry;
-int channel_id;
-void *channel_info;
-uint16_t type; // 0-> TCP, 1-> UDP, 2->SCTP
-/*Callbacks for channel message Tx and Rx*/
-int (*msg_send)(void *data, int size, int priority, void *channel_info);
-int (*msg_recv)(void **data, int *size, int *priority, void *channel_info);
-void (*release)(struct proto_agent_channel_s *channel);
+  int channel_id;
+  struct proto_agent_async_channel_s *channel_info;
+  /*Callbacks for channel message Tx and Rx*/
+  int (*msg_send)(void *data, int size, int priority, void *channel_info);
+  int (*msg_recv)(void **data, int *size, int *priority, void *channel_info);
+  void (*release)(struct proto_agent_channel_s *channel);
 } proto_agent_channel_t;
 
 typedef struct proto_agent_channel_instance_s{