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diff --git a/resources/libraries/python/TLDK/UdpTest.py b/resources/libraries/python/TLDK/UdpTest.py
new file mode 100644
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+++ b/resources/libraries/python/TLDK/UdpTest.py
@@ -0,0 +1,126 @@
+# Copyright (c) 2017 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.
+
+
+"""
+This module exists to provide the UDP test for TLDK on topology nodes.
+"""
+
+from scapy.utils import rdpcap
+from scapy.layers.inet import IP
+from scapy.layers.inet6 import IPv6
+
+from robot.libraries.BuiltIn import BuiltIn
+
+from resources.libraries.python.ssh import SSH
+from resources.libraries.python.TLDK.TLDKConstants import TLDKConstants as con
+from resources.libraries.python.topology import Topology
+
+class UdpTest(object):
+    """Test the TLDK UDP function."""
+
+    @staticmethod
+    def get_pcap_info(file_prefix):
+        """Get the Dest IP from the RX pcap file
+
+        :param file_prefix: the test case pcap file prefix
+        :type file_prefix: str
+        :returns: packet counts, dest ip, is or not ipv4
+        :rtype: tuple(int, str, bool).
+        """
+        exec_dir = BuiltIn().get_variable_value("${EXECDIR}")
+
+        rx_pcapfile = '{0}/{1}/{2}_rx.pcap' \
+            .format(exec_dir, con.TLDK_TESTCONFIG, file_prefix)
+        packets = rdpcap(rx_pcapfile)
+        count = len(packets)
+
+        ### the first packet
+        pkt = packets[0]
+        if pkt.type == 0x0800:
+            ### this is a IPv4 packet
+            dest_ip = pkt[IP].dst
+            is_ipv4 = True
+        elif pkt.type == 0x86dd:
+            ### this is a IPv6 packet
+            dest_ip = pkt[IPv6].dst
+            is_ipv4 = False
+
+        return count, dest_ip, is_ipv4
+
+    @staticmethod
+    def exec_the_udpfwd_test(dut_node, dut_if, file_prefix, \
+            dest_ip, is_ipv4=True):
+        """Execute the udpfwd on the dut_node.
+
+        :param dut_node: Will execute the udpfwd on this node.
+        :param dut_if: DUT interface name.
+        :param file_prefix: The test case config file prefix.
+        :param dest_ip: The UDP packet dest IP.
+        :param is_ipv4: Execute the IPv4 or IPv6 test.
+        :type dut_node: dict
+        :type dut_if: str
+        :type file_prefix: str
+        :type dest_ip: str
+        :type is_ipv4: bool
+        :returns: none.
+        :raises RuntimeError: If failed to execute udpfwd test on the dut node.
+        """
+        pci_address = Topology.get_interface_pci_addr(dut_node, dut_if)
+        ssh = SSH()
+        ssh.connect(dut_node)
+        if is_ipv4:
+            cmd = 'cd {0}/{4} && ./run_tldk.sh {0}/{5}/{2}_rx.pcap ' \
+                '{0}/{5}/{2}_tx.pcap {1} {0}/{5}/{2}_fe.cfg ' \
+                '{0}/{5}/{2}_be.cfg {3} NONE' \
+                .format(con.REMOTE_FW_DIR, pci_address, file_prefix, \
+                dest_ip, con.TLDK_SCRIPTS, con.TLDK_TESTCONFIG)
+        else:
+            cmd = 'cd {0}/{4} && ./run_tldk.sh {0}/{5}/{2}_rx.pcap ' \
+                '{0}/{5}/{2}_tx.pcap {1} {0}/{5}/{2}_fe.cfg ' \
+                '{0}/{5}/{2}_be.cfg NONE {3}' \
+                .format(con.REMOTE_FW_DIR, pci_address, file_prefix, \
+                dest_ip, con.TLDK_SCRIPTS, con.TLDK_TESTCONFIG)
+
+        (ret_code, _, _) = ssh.exec_command(cmd, timeout=600)
+        if ret_code != 0:
+            raise RuntimeError('Failed to execute udpfwd test at node {0}'
+                               .format(dut_node['host']))
+
+    @staticmethod
+    def get_the_test_result(dut_node, file_prefix):
+        """
+        After execute the udpfwd cmd, use this to get the test result.
+
+        :param dut_node: will get the test result in this dut node
+        :param dut_if: the dut interface name
+        :param file_prefix: the test case output file prefix
+        :type dut_node: dice
+        :type dut_if: str
+        :type file_prefix: str
+        :returns: str.
+        :rtype: str
+        :raises RuntimeError: If failed to get the test result.
+        """
+        ssh = SSH()
+        ssh.connect(dut_node)
+        cmd = 'cd {0}; tcpdump -nnnn -vvv -r ./{2}/{1}_tx.pcap | ' \
+            'grep \'udp sum ok\' | wc -l' \
+            .format(con.REMOTE_FW_DIR, file_prefix, con.TLDK_TESTCONFIG)
+
+        (ret_code, stdout, _) = ssh.exec_command(cmd, timeout=100)
+        if ret_code != 0:
+            raise RuntimeError('Failed to get test result at node {0}'
+                               .format(dut_node['host']))
+
+        return stdout