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diff --git a/GPL/traffic_profiles/trex/trex-stl-ethip4udp-65536u63p-udir.py b/GPL/traffic_profiles/trex/trex-stl-ethip4udp-65536u63p-udir.py
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+++ b/GPL/traffic_profiles/trex/trex-stl-ethip4udp-65536u63p-udir.py
@@ -0,0 +1,118 @@
+# Copyright (c) 2020 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
+#
+# 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.
+
+"""Stream profile for T-rex traffic generator.
+
+Stream profile:
+ - One stream sent in directions 0 --> 1.
+ - Packet: ETH / IP / UDP
+ - Direction 0 --> 1:
+   - Source IP address range:      192.168.0.0 - 192.168.255.255
+   - Destination IP address range: 20.0.255.255 - 20.0.255.255
+   - Source UDP port range:        1024 - 1086
+   - Destination UDP port range:   8080
+"""
+
+from trex.stl.api import *
+from profile_trex_stateless_base_class import TrafficStreamsBaseClass
+
+
+class TrafficStreams(TrafficStreamsBaseClass):
+    """Stream profile."""
+
+    def __init__(self):
+        """Initialization and setting of streams' parameters."""
+
+        super(TrafficStreamsBaseClass, self).__init__()
+
+        # IPs used in packet headers.
+        self.p1_src_start_ip = u"192.168.0.0"
+        self.p1_src_end_ip = u"192.168.255.255"
+        self.p1_dst_start_ip = u"20.0.0.0"
+        self.p1_dst_end_ip = u"20.0.255.255"
+
+        # UDP ports used in packet headers.
+        self.p1_src_start_udp_port = 1024
+        self.p1_src_end_udp_port = 1086
+        self.p1_dst_start_udp_port = 8080
+        self.p1_dst_end_udp_port = 8080
+
+    def define_packets(self):
+        """Defines the packets to be sent from the traffic generator.
+
+        Packet definition: | ETH | IP | UDP |
+
+        :returns: Packets to be sent from the traffic generator.
+        :rtype: tuple
+        """
+
+        # Direction 0 --> 1
+        base_pkt_a = (
+            Ether() /
+            IP(
+                src=self.p1_src_start_ip,
+                dst=self.p1_dst_start_ip,
+                proto=17
+            ) /
+            UDP(
+                sport=self.p1_src_start_udp_port,
+                dport=self.p1_dst_start_udp_port
+            )
+        )
+
+        base_pkt_b = (
+            Ether()
+        )
+
+        # Direction 0 --> 1
+        vm1 = STLVM()
+        vm1.var(name="sIP",
+                min_value=self.p1_src_start_ip,
+                max_value=self.p1_src_end_ip,
+                size=4,
+                op="inc",
+                next_var="sport")
+        vm1.var(name="sport",
+                min_value=self.p1_src_start_udp_port,
+                max_value=self.p1_src_end_udp_port,
+                size=2,
+                op="inc")
+        vm1.var(name="dIP",
+                min_value=self.p1_dst_start_ip,
+                max_value=self.p1_dst_end_ip,
+                size=4,
+                op="inc")
+        vm1.var(name="dport",
+                min_value=self.p1_dst_start_udp_port,
+                max_value=self.p1_dst_end_udp_port,
+                size=2,
+                op="inc")
+        vm1.write(fv_name="sIP", pkt_offset="IP.src")
+        vm1.write(fv_name="sport", pkt_offset="UDP.sport")
+        vm1.write(fv_name="dIP", pkt_offset="IP.dst")
+        vm1.write(fv_name="dport", pkt_offset="UDP.dport")
+        vm1.fix_chksum(offset='IP')
+
+        vm2 = STLVM()
+
+        return base_pkt_a, base_pkt_b, vm1, vm2
+
+def register():
+    """Register this traffic profile to T-rex.
+
+    Do not change this function.
+
+    :return: Traffic streams.
+    :rtype: Object
+    """
+    return TrafficStreams()