CSIT-545: Performance tests for SNAT

- High level definition (HLD)
- Low level definition (LLD)
- Add keywords to set SNAT
- Add tests according to HLD, LLD

Change-Id: I7bf0b1870ac9c3adb36bb6590be9a3eb4ea8aa9a
Signed-off-by: Tibor Frank <tifrank@cisco.com>

14 files changed, 722 insertions, 47 deletions

diff --git a/resources/libraries/python/SNATUtil.py b/resources/libraries/python/SNATUtil.py
new file mode 100644
index 0000000000..02cf493a93
--- /dev/null
+++ b/resources/libraries/python/SNATUtil.py
@@ -0,0 +1,171 @@
+# 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.
+
+"""SNAT utilities library."""
+
+from resources.libraries.python.VatExecutor import VatTerminal
+
+
+class SNATUtil(object):
+    """This class defines the methods to set SNAT."""
+
+    def __init__(self):
+        pass
+
+    @staticmethod
+    def set_snat_interfaces(node, int_in, int_out):
+        """Set inside and outside interfaces for SNAT.
+
+        :param node: DUT node.
+        :param int_in: Inside interface.
+        :param int_out: Outside interface.
+        :type node: dict
+        :type int_in: str
+        :type int_out: str
+        :returns: Response of the command.
+        :rtype: str
+        :raises RuntimeError: If setting of inside and outside interfaces for
+        SNAT fails.
+        """
+
+        try:
+            with VatTerminal(node, json_param=False) as vat:
+                response = vat.vat_terminal_exec_cmd_from_template(
+                    'snat/snat_set_interfaces.vat',
+                    int_in=int_in, int_out=int_out)
+                return response
+        except:
+            raise RuntimeError("Setting of inside and outside interfaces for "
+                               "SNAT failed!")
+
+    @staticmethod
+    def set_snat_deterministic(node, ip_in, subnet_in, ip_out, subnet_out):
+        """Set deterministic behaviour of SNAT.
+
+        :param node: DUT node.
+        :param ip_in: Inside IP.
+        :param subnet_in: Inside IP subnet.
+        :param ip_out: Outside IP.
+        :param subnet_out: Outside IP subnet.
+        :type node: dict
+        :type ip_in: str
+        :type subnet_in: str or int
+        :type ip_out: str
+        :type subnet_out: str or int
+        :returns: Response of the command.
+        :rtype: str
+        :raises RuntimeError: If setting of deterministic behaviour of SNAT
+        fails.
+        """
+
+        try:
+            with VatTerminal(node, json_param=False) as vat:
+                response = vat.vat_terminal_exec_cmd_from_template(
+                    'snat/snat_set_deterministic.vat',
+                    ip_in=ip_in, subnet_in=subnet_in,
+                    ip_out=ip_out, subnet_out=subnet_out)
+                return response
+        except:
+            raise RuntimeError("Setting of deterministic behaviour of SNAT "
+                               "failed!")
+
+    @staticmethod
+    def set_snat_workers(node, lcores):
+        """Set SNAT workers.
+
+        :param node: DUT node.
+        :param lcores: list of cores, format: range e.g. 1-5 or list of ranges
+        e.g.: 1-5,18-22.
+        :type node: dict
+        :type lcores: str
+        :returns: Response of the command.
+        :rtype: str
+        :raises RuntimeError: If setting of SNAT workers fails.
+        """
+
+        try:
+            with VatTerminal(node, json_param=False) as vat:
+                response = vat.vat_terminal_exec_cmd_from_template(
+                    'snat/snat_set_workers.vat', lcores=lcores)
+                return response
+        except:
+            raise RuntimeError("Setting of SNAT workers failed!")
+
+    @staticmethod
+    def show_snat(node):
+        """Show the SNAT settings.
+
+        :param node: DUT node.
+        :type node: dict
+        :returns: Response of the command.
+        :rtype: str
+        :raises RuntimeError: If getting of SNAT settings fails.
+        """
+
+        try:
+            with VatTerminal(node, json_param=False) as vat:
+                response = vat.vat_terminal_exec_cmd_from_template(
+                    'snat/snat_show_snat.vat')
+                return response
+        except:
+            raise RuntimeError("Getting of SNAT settings failed!")
+
+    @staticmethod
+    def show_snat_deterministic_forward(node, ip_addr):
+        """Show forward IP address and port(s).
+
+        :param node: DUT node.
+        :param ip_addr: IP address.
+        :type node: dict
+        :type ip_addr: str
+        :returns: Response of the command.
+        :rtype: str
+        :raises RuntimeError: If command 'exec snat deterministic forward'
+        fails.
+        """
+
+        try:
+            with VatTerminal(node, json_param=False) as vat:
+                response = vat.vat_terminal_exec_cmd_from_template(
+                    'snat/snat_deterministic_forward.vat', ip=ip_addr)
+                return response
+        except:
+            raise RuntimeError("Command 'exec snat deterministic forward {ip}'"
+                               " failed!".format(ip=ip_addr))
+
+    @staticmethod
+    def show_snat_deterministic_reverse(node, ip_addr, port):
+        """Show reverse IP address.
+
+        :param node: DUT node.
+        :param ip_addr: IP address.
+        :param port: Port.
+        :type node: dict
+        :type ip_addr: str
+        :type port: str or int
+        :returns: Response of the command.
+        :rtype: str
+        :raises RuntimeError: If command 'exec snat deterministic reverse'
+        fails.
+        """
+
+        try:
+            with VatTerminal(node, json_param=False) as vat:
+                response = vat.vat_terminal_exec_cmd_from_template(
+                    'snat/snat_deterministic_reverse.vat',
+                    ip=ip_addr, port=port)
+                return response
+        except:
+            raise RuntimeError(
+                "Command 'exec snat deterministic reverse {ip}:{port}'"
+                " failed!".format(ip=ip_addr, port=port))
diff --git a/resources/libraries/python/TrafficGenerator.py b/resources/libraries/python/TrafficGenerator.py
index 2313ec856b..8387ce2b3c 100644
--- a/resources/libraries/python/TrafficGenerator.py
+++ b/resources/libraries/python/TrafficGenerator.py
@@ -438,6 +438,161 @@ class TrafficGenerator(object):
                                                     _p0, _p1, _async, _latency,
                                                     warmup_time),
                 timeout=int(duration)+60)
+
+        elif traffic_type in ["3-node-IPv4-SNAT-1u-1p"]:
+            (ret, stdout, stderr) = ssh.exec_command(
+                "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
+                "--duration={1} -r {2} -s {3} "
+                "--p{4}_src_start_ip 20.0.0.0 "
+                "--p{4}_src_end_ip 20.0.0.0 "
+                "--p{4}_dst_start_ip 12.0.0.2 "
+                "--p{5}_src_start_ip 12.0.0.2 "
+                "--p{5}_src_end_ip 12.0.0.2 "
+                "--p{5}_dst_start_ip 200.0.0.0 "
+                "--p{4}_src_start_udp_port 1024 "
+                "--p{4}_src_end_udp_port 1024 "
+                "--p{4}_dst_start_udp_port 1024 "
+                "--p{5}_src_start_udp_port 1024 "
+                "--p{5}_dst_start_udp_port 1028 "
+                "--p{5}_dst_end_udp_port 1028 "
+                "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
+                                                    duration, rate, framesize,
+                                                    _p0, _p1, _async, _latency,
+                                                    warmup_time),
+                timeout=int(duration)+60)
+
+        elif traffic_type in ["3-node-IPv4-SNAT-1u-15p"]:
+            (ret, stdout, stderr) = ssh.exec_command(
+                "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
+                "--duration={1} -r {2} -s {3} "
+                "--p{4}_src_start_ip 20.0.0.0 "
+                "--p{4}_src_end_ip 20.0.0.0 "
+                "--p{4}_dst_start_ip 12.0.0.2 "
+                "--p{5}_src_start_ip 12.0.0.2 "
+                "--p{5}_src_end_ip 12.0.0.2 "
+                "--p{5}_dst_start_ip 200.0.0.0 "
+                "--p{4}_src_start_udp_port 1024 "
+                "--p{4}_src_end_udp_port 1038 "
+                "--p{4}_dst_start_udp_port 1024 "
+                "--p{5}_src_start_udp_port 1024 "
+                "--p{5}_dst_start_udp_port 1024 "
+                "--p{5}_dst_end_udp_port 1038 "
+                "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
+                                                    duration, rate, framesize,
+                                                    _p0, _p1, _async, _latency,
+                                                    warmup_time),
+                timeout=int(duration)+60)
+
+        elif traffic_type in ["3-node-IPv4-SNAT-10u-15p"]:
+            (ret, stdout, stderr) = ssh.exec_command(
+                "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
+                "--duration={1} -r {2} -s {3} "
+                "--p{4}_src_start_ip 20.0.0.0 "
+                "--p{4}_src_end_ip 20.0.0.9 "
+                "--p{4}_dst_start_ip 12.0.0.2 "
+                "--p{5}_src_start_ip 12.0.0.2 "
+                "--p{5}_src_end_ip 12.0.0.2 "
+                "--p{5}_dst_start_ip 200.0.0.0 "
+                "--p{4}_src_start_udp_port 1024 "
+                "--p{4}_src_end_udp_port 1038 "
+                "--p{4}_dst_start_udp_port 1024 "
+                "--p{5}_src_start_udp_port 1024 "
+                "--p{5}_dst_start_udp_port 1024 "
+                "--p{5}_dst_end_udp_port 1173 "
+                "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
+                                                    duration, rate, framesize,
+                                                    _p0, _p1, _async, _latency,
+                                                    warmup_time),
+                timeout=int(duration)+60)
+
+        elif traffic_type in ["3-node-IPv4-SNAT-100u-15p"]:
+            (ret, stdout, stderr) = ssh.exec_command(
+                "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
+                "--duration={1} -r {2} -s {3} "
+                "--p{4}_src_start_ip 20.0.0.0 "
+                "--p{4}_src_end_ip 20.0.0.99 "
+                "--p{4}_dst_start_ip 12.0.0.2 "
+                "--p{5}_src_start_ip 12.0.0.2 "
+                "--p{5}_src_end_ip 12.0.0.2 "
+                "--p{5}_dst_start_ip 200.0.0.0 "
+                "--p{4}_src_start_udp_port 1024 "
+                "--p{4}_src_end_udp_port 1038 "
+                "--p{4}_dst_start_udp_port 1024 "
+                "--p{5}_src_start_udp_port 1024 "
+                "--p{5}_dst_start_udp_port 1024 "
+                "--p{5}_dst_end_udp_port 2523 "
+                "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
+                                                    duration, rate, framesize,
+                                                    _p0, _p1, _async, _latency,
+                                                    warmup_time),
+                timeout=int(duration) + 60)
+
+        elif traffic_type in ["3-node-IPv4-SNAT-1000u-15p"]:
+            (ret, stdout, stderr) = ssh.exec_command(
+                "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
+                "--duration={1} -r {2} -s {3} "
+                "--p{4}_src_start_ip 20.0.0.0 "
+                "--p{4}_src_end_ip 20.0.3.231 "
+                "--p{4}_dst_start_ip 12.0.0.2 "
+                "--p{5}_src_start_ip 12.0.0.2 "
+                "--p{5}_src_end_ip 12.0.0.2 "
+                "--p{5}_dst_start_ip 200.0.0.0 "
+                "--p{4}_src_start_udp_port 1024 "
+                "--p{4}_src_end_udp_port 1038 "
+                "--p{4}_dst_start_udp_port 1024 "
+                "--p{5}_src_start_udp_port 1024 "
+                "--p{5}_dst_start_udp_port 1024 "
+                "--p{5}_dst_end_udp_port 16023 "
+                "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
+                                                    duration, rate, framesize,
+                                                    _p0, _p1, _async, _latency,
+                                                    warmup_time),
+                timeout=int(duration)+60)
+
+        elif traffic_type in ["3-node-IPv4-SNAT-2000u-15p"]:
+            (ret, stdout, stderr) = ssh.exec_command(
+                "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
+                "--duration={1} -r {2} -s {3} "
+                "--p{4}_src_start_ip 20.0.0.0 "
+                "--p{4}_src_end_ip 20.0.7.207 "
+                "--p{4}_dst_start_ip 12.0.0.2 "
+                "--p{5}_src_start_ip 12.0.0.2 "
+                "--p{5}_src_end_ip 12.0.0.2 "
+                "--p{5}_dst_start_ip 200.0.0.0 "
+                "--p{4}_src_start_udp_port 1024 "
+                "--p{4}_src_end_udp_port 1038 "
+                "--p{4}_dst_start_udp_port 1024 "
+                "--p{5}_src_start_udp_port 1024 "
+                "--p{5}_dst_start_udp_port 1024 "
+                "--p{5}_dst_end_udp_port 31022 "
+                "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
+                                                    duration, rate, framesize,
+                                                    _p0, _p1, _async, _latency,
+                                                    warmup_time),
+                timeout=int(duration)+60)
+
+        elif traffic_type in ["3-node-IPv4-SNAT-4000u-15p"]:
+            (ret, stdout, stderr) = ssh.exec_command(
+                "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
+                "--duration={1} -r {2} -s {3} "
+                "--p{4}_src_start_ip 20.0.0.0 "
+                "--p{4}_src_end_ip 20.0.15.159 "
+                "--p{4}_dst_start_ip 12.0.0.2 "
+                "--p{5}_src_start_ip 12.0.0.2 "
+                "--p{5}_src_end_ip 12.0.0.2 "
+                "--p{5}_dst_start_ip 200.0.0.0 "
+                "--p{4}_src_start_udp_port 1024 "
+                "--p{4}_src_end_udp_port 1038 "
+                "--p{4}_dst_start_udp_port 1024 "
+                "--p{5}_src_start_udp_port 1024 "
+                "--p{5}_dst_start_udp_port 1024 "
+                "--p{5}_dst_end_udp_port 61022 "
+                "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
+                                                    duration, rate, framesize,
+                                                    _p0, _p1, _async, _latency,
+                                                    warmup_time),
+                timeout=int(duration)+60)
+
         elif traffic_type in ["3-node-IPv4-dst-10000"]:
             (ret, stdout, stderr) = ssh.exec_command(
                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
diff --git a/resources/libraries/python/VppConfigGenerator.py b/resources/libraries/python/VppConfigGenerator.py
index 267c47845f..e109d768fa 100644
--- a/resources/libraries/python/VppConfigGenerator.py
+++ b/resources/libraries/python/VppConfigGenerator.py
@@ -67,7 +67,7 @@ ip6 {{
   hash-buckets 2000000
   heap-size 3G
 }}
-
+{snatconfig}
 """
 # End VPP configuration template.
 
@@ -83,22 +83,21 @@ class VppConfigGenerator(object):
 
         :param node: DUT node
         :type node: dict
-        :return: nothing
+        :returns: nothing
         """
         for port in node['interfaces'].keys():
             pci_addr = Topology.get_interface_pci_addr(node, port)
             if pci_addr:
                 self.add_pci_device(node, pci_addr)
 
-
     def add_pci_device(self, node, *pci_devices):
         """Add PCI device configuration for node.
 
         :param node: DUT node.
-        :param pci_device: PCI devices (format 0000:00:00.0 or 00:00.0)
+        :param pci_devices: PCI devices (format 0000:00:00.0 or 00:00.0)
         :type node: dict
         :type pci_devices: tuple
-        :return: nothing
+        :returns: nothing
         """
         if node['type'] != NodeType.DUT:
             raise ValueError('Node type is not a DUT')
@@ -129,7 +128,7 @@ class VppConfigGenerator(object):
         :param cpu_config: CPU configuration option, as a string.
         :type node: dict
         :type cpu_config: str
-        :return: nothing
+        :returns: nothing
         """
         if node['type'] != NodeType.DUT:
             raise ValueError('Node type is not a DUT')
@@ -150,7 +149,7 @@ class VppConfigGenerator(object):
         as a string.
         :type node: dict
         :type socketmem_config: str
-        :return: nothing
+        :returns: nothing
         """
         if node['type'] != NodeType.DUT:
             raise ValueError('Node type is not a DUT')
@@ -168,7 +167,7 @@ class VppConfigGenerator(object):
         :param heapsize_config: Heap Size configuration, as a string.
         :type node: dict
         :type heapsize_config: str
-        :return: nothing
+        :returns: nothing
         """
         if node['type'] != NodeType.DUT:
             raise ValueError('Node type is not a DUT')
@@ -186,56 +185,73 @@ class VppConfigGenerator(object):
         :param rxqueues_config: Rxqueues configuration, as a string.
         :type node: dict
         :type rxqueues_config: str
-        :return: nothing
+        :returns: nothing
         """
         if node['type'] != NodeType.DUT:
             raise ValueError('Node type is not a DUT')
         hostname = Topology.get_node_hostname(node)
-        if not hostname in self._nodeconfig:
+        if hostname not in self._nodeconfig:
             self._nodeconfig[hostname] = {}
-        if not 'rxqueues_config' in self._nodeconfig[hostname]:
+        if 'rxqueues_config' not in self._nodeconfig[hostname]:
             self._nodeconfig[hostname]['rxqueues_config'] = []
         self._nodeconfig[hostname]['rxqueues_config'].append(rxqueues_config)
-        logger.debug('Setting hostname {} rxqueues config to {}'.\
-            format(hostname, rxqueues_config))
+        logger.debug('Setting hostname {} rxqueues config to {}'.
+                     format(hostname, rxqueues_config))
 
     def add_no_multi_seg_config(self, node):
         """Add No Multi Seg configuration for node.
 
         :param node: DUT node.
         :type node: dict
-        :return: nothing
+        :returns: nothing
         """
         if node['type'] != NodeType.DUT:
             raise ValueError('Node type is not a DUT')
         hostname = Topology.get_node_hostname(node)
-        if not hostname in self._nodeconfig:
+        if hostname not in self._nodeconfig:
             self._nodeconfig[hostname] = {}
-        if not 'no_multi_seg_config' in self._nodeconfig[hostname]:
+        if 'no_multi_seg_config' not in self._nodeconfig[hostname]:
             self._nodeconfig[hostname]['no_multi_seg_config'] = []
-        self._nodeconfig[hostname]['no_multi_seg_config'].append(
-            "no-multi-seg")
-        logger.debug('Setting hostname {} config with {}'.\
-            format(hostname, "no-multi-seg"))
+        self._nodeconfig[hostname]['no_multi_seg_config'].append("no-multi-seg")
+        logger.debug('Setting hostname {} config with {}'.
+                     format(hostname, "no-multi-seg"))
 
     def add_enable_vhost_user_config(self, node):
         """Add enable-vhost-user configuration for node.
 
         :param node: DUT node.
         :type node: dict
-        :return: nothing
+        :returns: nothing
         """
         if node['type'] != NodeType.DUT:
             raise ValueError('Node type is not a DUT')
         hostname = Topology.get_node_hostname(node)
-        if not hostname in self._nodeconfig:
+        if hostname not in self._nodeconfig:
             self._nodeconfig[hostname] = {}
-        if not 'enable_vhost_user' in self._nodeconfig[hostname]:
+        if 'enable_vhost_user' not in self._nodeconfig[hostname]:
             self._nodeconfig[hostname]['enable_vhost_user'] = []
-        self._nodeconfig[hostname]['enable_vhost_user'].append(
-            "enable-vhost-user")
-        logger.debug('Setting hostname {} config with {}'.\
-            format(hostname, "enable-vhost-user"))
+        self._nodeconfig[hostname]['enable_vhost_user'].\
+            append("enable-vhost-user")
+        logger.debug('Setting hostname {} config with {}'.
+                     format(hostname, "enable-vhost-user"))
+
+    def add_snat_config(self, node):
+        """Add SNAT configuration for the node.
+
+        :param node: DUT node.
+        :type node: dict
+        :returns: nothing
+        """
+        if node['type'] != NodeType.DUT:
+            raise ValueError('Node type is not a DUT')
+        hostname = Topology.get_node_hostname(node)
+        if hostname not in self._nodeconfig:
+            self._nodeconfig[hostname] = {}
+        if 'snat_config' not in self._nodeconfig[hostname]:
+            self._nodeconfig[hostname]['snat_config'] = []
+        self._nodeconfig[hostname]['snat_config'].append("deterministic")
+        logger.debug('Setting hostname {} config with {}'.
+                     format(hostname, "SNAT"))
 
     def add_cryptodev_config(self, node, count):
         """Add cryptodev configuration for node.
@@ -276,7 +292,7 @@ class VppConfigGenerator(object):
 
         :param node: DUT node.
         :type node: dict
-        :return: nothing
+        :returns: nothing
         """
         if node['type'] != NodeType.DUT:
             raise ValueError('Node type is not a DUT')
@@ -291,7 +307,7 @@ class VppConfigGenerator(object):
 
         :param node: DUT node.
         :type node: dict
-        :return: nothing
+        :returns: nothing
         """
         if node['type'] != NodeType.DUT:
             raise ValueError('Node type is not a DUT')
@@ -306,7 +322,7 @@ class VppConfigGenerator(object):
 
         :param node: DUT node.
         :type node: dict
-        :return: nothing
+        :returns: nothing
         """
         if node['type'] != NodeType.DUT:
             raise ValueError('Node type is not a DUT')
@@ -337,7 +353,7 @@ class VppConfigGenerator(object):
 
         :param node: DUT node.
         :type node: dict
-        :return: nothing
+        :returns: nothing
         """
         if node['type'] != NodeType.DUT:
             raise ValueError('Node type is not a DUT')
@@ -352,45 +368,59 @@ class VppConfigGenerator(object):
 
         :param node: DUT node.
         :type node: dict
-        :return: nothing
+        :returns: nothing
         """
         if node['type'] != NodeType.DUT:
             raise ValueError('Node type is not a DUT')
         hostname = Topology.get_node_hostname(node)
         if hostname in self._nodeconfig:
             self._nodeconfig[hostname]['rxqueues_config'] = []
-        logger.debug('Clearing rxqueues config for hostname {}.'.\
-            format(hostname))
+        logger.debug('Clearing rxqueues config for hostname {}.'.
+                     format(hostname))
 
     def remove_no_multi_seg_config(self, node):
         """Remove No Multi Seg configuration from node.
 
         :param node: DUT node.
         :type node: dict
-        :return: nothing
+        :returns: nothing
         """
         if node['type'] != NodeType.DUT:
             raise ValueError('Node type is not a DUT')
         hostname = Topology.get_node_hostname(node)
         if hostname in self._nodeconfig:
             self._nodeconfig[hostname]['no_multi_seg_config'] = []
-        logger.debug('Clearing No Multi Seg config for hostname {}.'.\
-            format(hostname))
+        logger.debug('Clearing No Multi Seg config for hostname {}.'.
+                     format(hostname))
 
     def remove_enable_vhost_user_config(self, node):
         """Remove enable-vhost-user configuration from node.
 
         :param node: DUT node.
         :type node: dict
-        :return: nothing
+        :returns: nothing
         """
         if node['type'] != NodeType.DUT:
             raise ValueError('Node type is not a DUT')
         hostname = Topology.get_node_hostname(node)
         if hostname in self._nodeconfig:
             self._nodeconfig[hostname]['enable_vhost_user'] = []
-        logger.debug('Clearing enable-vhost-user config for hostname {}.'.\
-            format(hostname))
+        logger.debug('Clearing enable-vhost-user config for hostname {}.'.
+                     format(hostname))
+
+    def remove_snat_config(self, node):
+        """Remove SNAT configuration for the node.
+
+        :param node: DUT node.
+        :type node: dict
+        :returns: nothing
+        """
+        if node['type'] != NodeType.DUT:
+            raise ValueError('Node type is not a DUT')
+        hostname = Topology.get_node_hostname(node)
+        if hostname in self._nodeconfig:
+            self._nodeconfig[hostname]['snat_config'] = []
+        logger.debug('Clearing SNAT config for hostname {}.'.format(hostname))
 
     def apply_config(self, node, waittime=5, retries=12):
         """Generate and apply VPP configuration for node.
@@ -404,6 +434,8 @@ class VppConfigGenerator(object):
         :type node: dict
         :type waittime: int
         :type retries: int
+        :raises RuntimeError: If writing config file failed, or restarting of
+        VPP failed.
         """
 
         if node['type'] != NodeType.DUT:
@@ -420,6 +452,7 @@ class VppConfigGenerator(object):
         enablevhostuser = ""
         cryptodevconfig = ""
         uiodriverconfig = ""
+        snatconfig = ""
 
         if hostname in self._nodeconfig:
             cfg = self._nodeconfig[hostname]
@@ -451,6 +484,11 @@ class VppConfigGenerator(object):
             if 'enable_vhost_user' in cfg:
                 enablevhostuser = "  " + "\n  ".join(cfg['enable_vhost_user'])
 
+            if 'snat_config' in cfg:
+                snatconfig = "snat {\n"
+                snatconfig += "  " + "\n  ".join(cfg['snat_config'])
+                snatconfig += "\n}"
+
         vppconfig = VPP_CONFIG_TEMPLATE.format(cpuconfig=cpuconfig,
                                                pciconfig=pciconfig,
                                                cryptodevconfig=cryptodevconfig,
@@ -460,7 +498,8 @@ class VppConfigGenerator(object):
                                                rxqueuesconfig=rxqueuesconfig,
                                                txqueuesconfig=txqueuesconfig,
                                                nomultiseg=nomultiseg,
-                                               enablevhostuser=enablevhostuser)
+                                               enablevhostuser=enablevhostuser,
+                                               snatconfig=snatconfig)
 
         logger.debug('Writing VPP config to host {}: "{}"'.format(hostname,
                                                                   vppconfig))
@@ -517,7 +556,6 @@ class VppConfigGenerator(object):
             (ret, stdout, stderr) = \
                 ssh.exec_command('echo show hardware-interfaces | '
                                  'nc 0 5002')
-
             if ret == 0:
                 vpp_is_running = True
             else:
diff --git a/resources/libraries/python/ssh.py b/resources/libraries/python/ssh.py
index 7b15998be0..961f7e2ee8 100644
--- a/resources/libraries/python/ssh.py
+++ b/resources/libraries/python/ssh.py
@@ -285,7 +285,7 @@ class SSH(object):
         logger.trace('SCP {0} to {1}:{2}'.format(
             local_path, self._ssh.get_transport().getpeername(), remote_path))
         # SCPCLient takes a paramiko transport as its only argument
-        scp = SCPClient(self._ssh.get_transport())
+        scp = SCPClient(self._ssh.get_transport(), socket_timeout=10)
         start = time()
         scp.put(local_path, remote_path)
         scp.close()
diff --git a/resources/libraries/robot/default.robot b/resources/libraries/robot/default.robot
index 08315c32ef..05314d6a15 100644
--- a/resources/libraries/robot/default.robot
+++ b/resources/libraries/robot/default.robot
@@ -281,6 +281,13 @@
 | | :FOR | ${dut} | IN | @{duts}
 | | | Add Enable Vhost User Config | ${nodes['${dut}']}
 
+| Add SNAT to all DUTs
+| | [Documentation] | Add SNAT configuration to all DUTs.
+| | ...
+| | ${duts}= | Get Matches | ${nodes} | DUT*
+| | :FOR | ${dut} | IN | @{duts}
+| | | Add SNAT Config | ${nodes['${dut}']}
+
 | Add Cryptodev to all DUTs
 | | [Documentation] | AddCryptodev to VPP startup configuration to all
 | | ...             | DUTs
@@ -310,6 +317,7 @@
 | | | Remove Rxqueues Config | ${nodes['${dut}']}
 | | | Remove No Multi Seg Config | ${nodes['${dut}']}
 | | | Remove Enable Vhost User Config | ${nodes['${dut}']}
+| | | Remove SNAT Config | ${nodes['${dut}']}
 
 | Setup default startup configuration of VPP on all DUTs
 | | [Documentation] | Setup default startup configuration of VPP to all DUTs.
diff --git a/resources/libraries/robot/performance.robot b/resources/libraries/robot/performance.robot
index ee662841c9..69d8fdb7aa 100644
--- a/resources/libraries/robot/performance.robot
+++ b/resources/libraries/robot/performance.robot
@@ -2288,6 +2288,43 @@
 | | dut1_v4.set_arp | ${dut1_if2} | ${dut2_dut1_ip4_address} | ${dut2_if1_mac}
 | | dut2_v4.set_arp | ${dut2_if1} | ${dut1_dut2_ip4_address} | ${dut1_if2_mac}
 
+| SNAT is initialized in a 3-node circular topology
+| | [Documentation] | Initialization of 3-node topology with SNAT between DUTs:
+| | ... | - set interfaces up
+| | ... | - set IP addresses
+| | ... | - set ARP
+| | ... | - create routes
+| | ... | - set SNAT - only on DUT1
+| | ...
+| | Set Interface State | ${dut1} | ${dut1_if1} | up
+| | Set Interface State | ${dut1} | ${dut1_if2} | up
+| | Set Interface State | ${dut2} | ${dut2_if1} | up
+| | Set Interface State | ${dut2} | ${dut2_if2} | up
+| | All Vpp Interfaces Ready Wait | ${nodes}
+| | ...
+| | IP addresses are set on interfaces | ${dut1} | ${dut1_if1} | 10.0.0.1 | 20
+| | IP addresses are set on interfaces | ${dut1} | ${dut1_if2} | 11.0.0.1 | 20
+| | IP addresses are set on interfaces | ${dut2} | ${dut2_if1} | 11.0.0.2 | 20
+| | IP addresses are set on interfaces | ${dut2} | ${dut2_if2} | 12.0.0.1 | 20
+| | ...
+| | ${tg_if1_mac}= | Get Interface MAC | ${tg} | ${tg_if1}
+| | ${tg_if2_mac}= | Get Interface MAC | ${tg} | ${tg_if2}
+| | ${dut1_if2_mac}= | Get Interface MAC | ${dut1} | ${dut1_if2}
+| | ${dut2_if1_mac}= | Get Interface MAC | ${dut2} | ${dut2_if1}
+| | ...
+| | Add arp on dut | ${dut1} | ${dut1_if1} | 10.0.0.2 | ${tg_if1_mac}
+| | Add arp on dut | ${dut1} | ${dut1_if2} | 11.0.0.2 | ${dut2_if1_mac}
+| | Add arp on dut | ${dut2} | ${dut2_if1} | 11.0.0.1 | ${dut1_if2_mac}
+| | Add arp on dut | ${dut2} | ${dut2_if2} | 12.0.0.2 | ${tg_if2_mac}
+| | ...
+| | Vpp Route Add | ${dut1} | 12.0.0.2 | 32 | 11.0.0.2 | ${dut1_if2}
+| | Vpp Route Add | ${dut1} | 20.0.0.0 | 18 | 10.0.0.2 | ${dut1_if1}
+| | Vpp Route Add | ${dut2} | 12.0.0.0 | 24 | 12.0.0.2 | ${dut2_if2}
+| | Vpp Route Add | ${dut2} | 200.0.0.0 | 30 | 11.0.0.1 | ${dut2_if1}
+| | ...
+| | Set inside and outside interfaces | ${dut1} | ${dut1_if1} | ${dut1_if2}
+| | Set deterministic mode for SNAT | ${dut1} | 20.0.0.0 | 18 | 200.0.0.0 | 30
+
 | DPDK 2-node Performance Suite Setup with DUT's NIC model
 | | [Documentation]
 | | ... | Updates interfaces on all nodes and setup global
diff --git a/resources/libraries/robot/snat.robot b/resources/libraries/robot/snat.robot
new file mode 100644
index 0000000000..12c7a71369
--- /dev/null
+++ b/resources/libraries/robot/snat.robot
@@ -0,0 +1,150 @@
+# 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.
+
+*** Settings ***
+| Library | resources.libraries.python.SNATUtil
+| Library | resources.libraries.python.NAT.NATUtil
+| Documentation | Keywords for SNAT feature in VPP.
+
+*** Keywords ***
+| Set inside and outside interfaces
+| | [Documentation] | Set inside and outside interfaces for SNAT.
+| | ...
+| | ... | *Arguments:*
+| | ... | - node - DUT node to set SNAT interfaces on. Type: dictionary
+| | ... | - int_in - Inside interface. Type: string
+| | ... | - int_out - Outside interface. Type: string
+| | ...
+| | ... | *Example:*
+| | ...
+| | ... | \| Set inside and outside interfaces \| ${nodes['DUT1']} \
+| | ... | \| FortyGigabitEtherneta/0/0 \| FortyGigabitEtherneta/0/1 \|
+| | ...
+| | [Arguments] | ${node} | ${int_in} | ${int_out}
+| | ...
+| | ${int_in_name}= | Set variable | ${node['interfaces']['${int_in}']['name']}
+| | ${int_out_name}= | Set variable | ${node['interfaces']['${int_out}']['name']}
+| | Set SNAT Interfaces | ${node} | ${int_in_name} | ${int_out_name}
+
+| Set deterministic mode for SNAT
+| | [Documentation] | Set deterministic behaviour of SNAT.
+| | ...
+| | ... | *Arguments:*
+| | ... | - node - DUT node to set deterministic mode for SNAT on.
+| | ... | Type: dictionary
+| | ... | - ip_in - Inside IP. Type: string
+| | ... | - subnet_in - Inside IP subnet. Type: string
+| | ... | - ip_out - Outside IP. Type: string
+| | ... | - subnet_out - Outside IP subnet. Type: string
+| | ...
+| | ... | *Example:*
+| | ...
+| | ... | \| Set deterministic mode for SNAT \| ${nodes['DUT1']} \
+| | ... | \| 100.0.0.0 \| 12 \| 12.1.1.0 \| 24 \|
+| | ...
+| | [Arguments] | ${node} | ${ip_in} | ${subnet_in} | ${ip_out} | ${subnet_out}
+| | ...
+| | Set SNAT deterministic | ${node} | ${ip_in} | ${subnet_in} | ${ip_out}
+| | ... | ${subnet_out}
+
+| Set workers for SNAT
+| | [Documentation] | Set workers for SNAT.
+| | ...
+| | ... | *Arguments:*
+| | ... | - node - DUT node to set SNAT workers on. Type: dictionary
+| | ... | - lcores - list of cores, format: range e.g. 1-5 or list of ranges \
+| | ... | e.g.: 1-5,18-22. Type: string
+| | ...
+| | ... | *Example:*
+| | ...
+| | ... | \| Set workers for SNAT \| ${nodes['DUT1']} \| 12-23,36-47 \|
+| | ...
+| | [Arguments] | ${node} | ${lcores}
+| | ...
+| | Set SNAT workers | ${node} | ${lcores}
+
+| Show SNAT verbose
+| | [Documentation] | Get the SNAT settings on the node.
+| | ...
+| | ... | *Arguments:*
+| | ... | - node - DUT node to show SNAT. Type: dictionary
+| | ...
+| | ... | *Example:*
+| | ...
+| | ... | \| Show SNAT verbose \| ${nodes['DUT1']} \|
+| | ...
+| | [Arguments] | ${node}
+| | ...
+| | Show SNAT | ${node}
+
+| Get SNAT deterministic forward
+| | [Documentation] | Show forward IP address and port(s).
+| | ...
+| | ... | *Arguments:*
+| | ... | - node - DUT node to get SNAT deterministic forward on.
+| | ... | Type: dictionary
+| | ... | - ip - IP address. Type: string
+| | ...
+| | ... | *Example:*
+| | ...
+| | ... | \| Get SNAT deterministic forward \| ${nodes['DUT1']} \| 10.0.0.2 \|
+| | ...
+| | [Arguments] | ${node} | ${ip}
+| | ...
+| | Show SNAT deterministic forward | ${node} | ${ip}
+
+| Get SNAT deterministic reverse
+| | [Documentation] | Show reverse IP address.
+| | ...
+| | ... | *Arguments:*
+| | ... | - node - DUT node to get SNAT deterministic reverse on.
+| | ... | Type: dictionary
+| | ... | - ip - IP address. Type: string
+| | ... | - port - Port. Type: string or integer
+| | ...
+| | ... | *Example:*
+| | ...
+| | ... | \| Get SNAT deterministic reverse \| ${nodes['DUT1']} \| 10.0.0.2 \
+| | ... | \| 1025 \|
+| | ...
+| | [Arguments] | ${node} | ${ip} | ${port}
+| | ...
+| | Show SNAT deterministic reverse | ${node} | ${ip} | ${port}
+
+| Get NAT interfaces
+| | [Documentation] | Get list of interfaces configured with NAT from VPP node.
+| | ...
+| | ... | *Arguments:*
+| | ... | - node - DUT node to get SNAT interfaces on. Type: dictionary
+| | ...
+| | ... | *Example:*
+| | ...
+| | ... | \| Get NAT interfaces \| ${nodes['DUT1']} \|
+| | ...
+| | [Arguments] | ${node}
+| | ...
+| | VPP get NAT interfaces | ${node}
+
+| Get NAT static mappings
+| | [Documentation] | Get NAT static mappings from VPP node.
+| | ...
+| | ... | *Arguments:*
+| | ... | - node - DUT node to get SNAT static mappings on. Type: dictionary
+| | ...
+| | ... | *Example:*
+| | ...
+| | ... | \| Get NAT static mappings \| ${nodes['DUT1']} \|
+| | ...
+| | [Arguments] | ${node}
+| | ...
+| | VPP get NAT static mappings | ${node}
diff --git a/resources/templates/vat/snat/snat_deterministic_forward.vat b/resources/templates/vat/snat/snat_deterministic_forward.vat
new file mode 100644
index 0000000000..3bb7b2b1f9
--- /dev/null
+++ b/resources/templates/vat/snat/snat_deterministic_forward.vat
@@ -0,0 +1 @@
+exec snat deterministic forward {ip}
\ No newline at end of file
diff --git a/resources/templates/vat/snat/snat_deterministic_reverse.vat b/resources/templates/vat/snat/snat_deterministic_reverse.vat
new file mode 100644
index 0000000000..1b9ac5bac5
--- /dev/null
+++ b/resources/templates/vat/snat/snat_deterministic_reverse.vat
@@ -0,0 +1 @@
+exec snat deterministic reverse {ip}:{port}
\ No newline at end of file
diff --git a/resources/templates/vat/snat/snat_set_deterministic.vat b/resources/templates/vat/snat/snat_set_deterministic.vat
new file mode 100644
index 0000000000..200ae69008
--- /dev/null
+++ b/resources/templates/vat/snat/snat_set_deterministic.vat
@@ -0,0 +1 @@
+exec snat deterministic add in {ip_in}/{subnet_in} out {ip_out}/{subnet_out}
\ No newline at end of file
diff --git a/resources/templates/vat/snat/snat_set_interfaces.vat b/resources/templates/vat/snat/snat_set_interfaces.vat
new file mode 100644
index 0000000000..905c219ca3
--- /dev/null
+++ b/resources/templates/vat/snat/snat_set_interfaces.vat
@@ -0,0 +1 @@
+exec set interface snat in {int_in} out {int_out}
\ No newline at end of file
diff --git a/resources/templates/vat/snat/snat_set_workers.vat b/resources/templates/vat/snat/snat_set_workers.vat
new file mode 100644
index 0000000000..23e8bac3eb
--- /dev/null
+++ b/resources/templates/vat/snat/snat_set_workers.vat
@@ -0,0 +1 @@
+exec set snat workers {lcores}
\ No newline at end of file
diff --git a/resources/templates/vat/snat/snat_show_snat.vat b/resources/templates/vat/snat/snat_show_snat.vat
new file mode 100644
index 0000000000..0ce9f1e914
--- /dev/null
+++ b/resources/templates/vat/snat/snat_show_snat.vat
@@ -0,0 +1 @@
+exec show snat verbose
\ No newline at end of file
diff --git a/resources/tools/t-rex/t-rex-stateless.py b/resources/tools/t-rex/t-rex-stateless.py
index 504ef50eef..ae8d187670 100755
--- a/resources/tools/t-rex/t-rex-stateless.py
+++ b/resources/tools/t-rex/t-rex-stateless.py
@@ -172,12 +172,13 @@ def create_streams_v46(base_pkt_a, base_pkt_b, vm1, vm2, frame_size):
 
     return (stream1, stream2, lat_stream1, lat_stream2)
 
+
 def create_streams(traffic_options, frame_size=64):
     """Create two IP packets to be used in stream.
 
     :param traffic_options: Parameters for packets.
     :param frame_size: Size of L2 frame.
-    :type traffic_options: list
+    :type traffic_options: dict
     :type frame_size: int
     :return: Packet instances.
     :rtype: Tuple of STLPktBuilder
@@ -197,13 +198,91 @@ def create_streams(traffic_options, frame_size=64):
     p1_dst_end_ip = traffic_options['p1_dst_end_ip']
     p2_dst_end_ip = traffic_options['p2_dst_end_ip']
 
-    base_pkt_a = Ether()/IP(src=p1_src_start_ip, dst=p1_dst_start_ip, proto=61)
-    base_pkt_b = Ether()/IP(src=p2_src_start_ip, dst=p2_dst_start_ip, proto=61)
+    try:
+        p1_src_start_udp_port = traffic_options['p1_src_start_udp_port']
+        p1_src_end_udp_port = traffic_options['p1_src_end_udp_port']
+        p1_dst_start_udp_port = traffic_options['p1_dst_start_udp_port']
+        p2_src_start_udp_port = traffic_options['p2_src_start_udp_port']
+        p2_dst_start_udp_port = traffic_options['p2_dst_start_udp_port']
+        p2_dst_end_udp_port = traffic_options['p2_dst_end_udp_port']
+        ports_defined = True
+    except KeyError:
+        ports_defined = False
+
+    if ports_defined:
+        base_pkt_a = (Ether() /
+                      IP(src=p1_src_start_ip, dst=p1_dst_start_ip, proto=17) /
+                      UDP(sport=int(p1_src_start_udp_port),
+                          dport=int(p1_dst_start_udp_port)))
+        base_pkt_b = (Ether() /
+                      IP(src=p2_src_start_ip, dst=p2_dst_start_ip, proto=17) /
+                      UDP(sport=int(p2_src_start_udp_port),
+                          dport=int(p2_dst_start_udp_port)))
+    else:
+        base_pkt_a = Ether() / IP(src=p1_src_start_ip, dst=p1_dst_start_ip,
+                                  proto=61)
+        base_pkt_b = Ether() / IP(src=p2_src_start_ip, dst=p2_dst_start_ip,
+                                  proto=61)
 
     # The following code applies raw instructions to packet (IP src/dst
     # increment). It splits the generated traffic by "ip_src"/"ip_dst" variable
     # to cores and fix IPv4 header checksum.
-    if p1_dst_end_ip and p2_dst_end_ip:
+    if ports_defined:
+        if p1_src_start_udp_port != p1_src_end_udp_port and \
+                        p1_src_start_ip != p1_src_end_ip:
+            vm1 = STLScVmRaw([
+                STLVmTupleGen(ip_min=p1_src_start_ip,
+                              ip_max=p1_src_end_ip,
+                              port_min=int(p1_src_start_udp_port),
+                              port_max=int(p1_src_end_udp_port),
+                              name="tuple"),
+                STLVmWrFlowVar(fv_name="tuple.ip", pkt_offset="IP.src"),
+                STLVmFixIpv4(offset="IP"),
+                STLVmWrFlowVar(fv_name="tuple.port", pkt_offset="UDP.sport")
+            ])
+            vm2 = STLScVmRaw([
+                STLVmTupleGen(ip_min=p2_dst_start_ip,
+                              ip_max=p2_dst_start_ip,
+                              port_min=int(p2_dst_start_udp_port),
+                              port_max=int(p2_dst_end_udp_port),
+                              name="tuple"),
+                STLVmWrFlowVar(fv_name="tuple.ip", pkt_offset="IP.dst"),
+                STLVmFixIpv4(offset="IP"),
+                STLVmWrFlowVar(fv_name="tuple.port", pkt_offset="UDP.dport")
+            ])
+        elif p1_src_start_udp_port != p1_src_end_udp_port:
+            vm1 = STLScVmRaw([
+                STLVmFlowVar(name="sport",
+                             min_value=int(p1_src_start_udp_port),
+                             max_value=int(p1_src_end_udp_port),
+                             size=2, op="inc"),
+                STLVmWrFlowVar(fv_name="sport", pkt_offset="UDP.sport")
+                ])
+            vm2 = STLScVmRaw([
+                STLVmFlowVar(name="dport",
+                             min_value=int(p2_dst_start_udp_port),
+                             max_value=int(p2_dst_end_udp_port),
+                             size=2, op="inc"),
+                STLVmWrFlowVar(fv_name="dport", pkt_offset="UDP.dport")
+            ])
+        elif p1_src_start_udp_port == p1_src_end_udp_port:
+            vm1 = STLScVmRaw([STLVmFlowVar(name="src",
+                                           min_value=p1_src_start_ip,
+                                           max_value=p1_src_end_ip,
+                                           size=4, op="inc"),
+                              STLVmWrFlowVar(fv_name="src",
+                                             pkt_offset="IP.src"),
+                              STLVmFixIpv4(offset="IP"),
+                              ], split_by_field="src")
+            vm2 = STLScVmRaw([STLVmFlowVar(name="src",
+                                           min_value=p2_src_start_ip,
+                                           max_value=p2_src_end_ip,
+                                           size=4, op="inc"),
+                              STLVmWrFlowVar(fv_name="src",
+                                             pkt_offset="IP.src"),
+                              STLVmFixIpv4(offset="IP"),
+                              ], split_by_field="src")
+    elif p1_dst_end_ip and p2_dst_end_ip:
         vm1 = STLScVmRaw([STLVmFlowVar(name="dst",
                                        min_value=p1_dst_start_ip,
                                        max_value=p1_dst_end_ip,
@@ -524,6 +603,7 @@ def parse_args():
 #                        help="Port 1 source MAC address")
 #    parser.add_argument("--p1_dst_mac",
 #                        help="Port 1 destination MAC address")
+
     parser.add_argument("--p1_src_start_ip", required=True,
                         help="Port 1 source start IP address")
     parser.add_argument("--p1_src_end_ip",
@@ -534,10 +614,26 @@ def parse_args():
     parser.add_argument("--p1_dst_end_ip",
                         default=False,
                         help="Port 1 destination end IP address")
+
+    parser.add_argument("--p1_src_start_udp_port",
+                        default=None,
+                        help="Port 1 source start UDP port.")
+    parser.add_argument("--p1_src_end_udp_port",
+                        default=None,
+                        help="Port 1 source end UDP port.")
+
+    parser.add_argument("--p1_dst_start_udp_port",
+                        default=None,
+                        help="Port 1 destination start UDP port.")
+    parser.add_argument("--p1_dst_end_udp_port",
+                        default=None,
+                        help="Port 1 destination end UDP port.")
+
 #    parser.add_argument("--p2_src_mac",
 #                        help="Port 2 source MAC address")
 #    parser.add_argument("--p2_dst_mac",
 #                        help="Port 2 destination MAC address")
+
     parser.add_argument("--p2_src_start_ip", required=True,
                         help="Port 2 source start IP address")
     parser.add_argument("--p2_src_end_ip",
@@ -549,6 +645,20 @@ def parse_args():
                         default=False,
                         help="Port 2 destination end IP address")
 
+    parser.add_argument("--p2_src_start_udp_port",
+                        default=None,
+                        help="Port 2 source start UDP port.")
+    parser.add_argument("--p2_src_end_udp_port",
+                        default=None,
+                        help="Port 2 source end UDP port.")
+
+    parser.add_argument("--p2_dst_start_udp_port",
+                        default=None,
+                        help="Port 2 destination start UDP port.")
+    parser.add_argument("--p2_dst_end_udp_port",
+                        default=None,
+                        help="Port 2 destination end UDP port.")
+
     return parser.parse_args()