diff --git a/cmake_targets/tools/setup_routes.sh b/cmake_targets/tools/setup_routes.sh
new file mode 100755
index 0000000000..67fe250be7
--- /dev/null
+++ b/cmake_targets/tools/setup_routes.sh
@@ -0,0 +1,13 @@
+#!/bin/bash
+
+for i in $(seq 1 $1);
+do
+    let table=1000+$i
+    echo "sudo ip route add 10.0.1.0/24 dev oaitun_ue$i table $table"
+    sudo ip route add 10.0.1.0/24 dev oaitun_ue$i table $table
+    echo "sudo ip route add default via 10.0.1.1 dev oaitun_ue$i table $table"
+    sudo ip route add default via 10.0.1.1 dev oaitun_ue$i table $table
+    let octet=$i+1
+    echo "sudo ip rule add from 10.0.1.$octet table $table"
+    sudo ip rule add from 10.0.1.$octet table $table
+done
diff --git a/openair2/LAYER2/PDCP_v10.1.0/pdcp.c b/openair2/LAYER2/PDCP_v10.1.0/pdcp.c
index 51d3cfc8f3..cddb666bfd 100644
--- a/openair2/LAYER2/PDCP_v10.1.0/pdcp.c
+++ b/openair2/LAYER2/PDCP_v10.1.0/pdcp.c
@@ -1081,7 +1081,13 @@ pdcp_data_ind(
               pdcpHead->inst  = 1;
             }
           } // nfapi_mode
-        }
+        } else {
+	  if (UE_NAS_USE_TUN) {
+	    pdcpHead->inst  = ctxt_pP->module_id;
+	  } else if (ENB_NAS_USE_TUN) {
+	    pdcpHead->inst  = 0;
+	  }
+	}
       } else {
         pdcpHead->rb_id = rb_id + (ctxt_pP->module_id * LTE_maxDRB);
         pdcpHead->inst  = ctxt_pP->module_id;
diff --git a/openair2/LAYER2/PDCP_v10.1.0/pdcp_fifo.c b/openair2/LAYER2/PDCP_v10.1.0/pdcp_fifo.c
index 8ff3c06cd4..cc44572abd 100644
--- a/openair2/LAYER2/PDCP_v10.1.0/pdcp_fifo.c
+++ b/openair2/LAYER2/PDCP_v10.1.0/pdcp_fifo.c
@@ -43,6 +43,7 @@ extern int otg_enabled;
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
+#include <netinet/ip.h>
 #define rtf_put write
 #define rtf_get read
 
@@ -222,7 +223,11 @@ int pdcp_fifo_read_input_sdus_fromtun (const protocol_ctxt_t *const  ctxt_pP) {
       key = PDCP_COLL_KEY_DEFAULT_DRB_VALUE(ctxt.module_id, ctxt.rnti, ctxt.enb_flag);
       h_rc = hashtable_get(pdcp_coll_p, key, (void **)&pdcp_p);
     } else { // => ENB_NAS_USE_TUN
-      ctxt.rnti=pdcp_eNB_UE_instance_to_rnti[0];
+      /* Get the IP from a packet */
+      struct ip *ip_pack = (struct ip *) nl_rx_buf;
+      /* Use last octet of destination IP to get index of UE */
+      int ue_indx = ((ip_pack->ip_dst.s_addr >> 24) -  2) % MAX_MOBILES_PER_ENB;
+      ctxt.rnti=pdcp_eNB_UE_instance_to_rnti[ue_indx];
       ctxt.enb_flag=ENB_FLAG_YES;
       ctxt.module_id=0;
       key = PDCP_COLL_KEY_VALUE(ctxt.module_id, ctxt.rnti, ctxt.enb_flag, rab_id, SRB_FLAG_NO);