resources/libraries/python/TrafficGenerator.py

   1 # Copyright (c) 2016 Cisco and/or its affiliates.
   2 # Licensed under the Apache License, Version 2.0 (the "License");
   3 # you may not use this file except in compliance with the License.
   4 # You may obtain a copy of the License at:
   5 #
   6 #     http://www.apache.org/licenses/LICENSE-2.0
   7 #
   8 # Unless required by applicable law or agreed to in writing, software
   9 # distributed under the License is distributed on an "AS IS" BASIS,
  10 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  11 # See the License for the specific language governing permissions and
  12 # limitations under the License.
  13
  14 """Performance testing traffic generator library."""
  15
  16 from robot.api import logger
  17 from robot.libraries.BuiltIn import BuiltIn
  18
  19 from resources.libraries.python.constants import Constants
  20 from resources.libraries.python.ssh import SSH
  21 from resources.libraries.python.topology import NodeType
  22 from resources.libraries.python.topology import NodeSubTypeTG
  23 from resources.libraries.python.topology import Topology
  24 from resources.libraries.python.DropRateSearch import DropRateSearch
  25
  26 __all__ = ['TrafficGenerator', 'TGDropRateSearchImpl']
  27
  28
  29 class TGDropRateSearchImpl(DropRateSearch):
  30     """Drop Rate Search implementation."""
  31
  32     def __init__(self):
  33         super(TGDropRateSearchImpl, self).__init__()
  34
  35     def measure_loss(self, rate, frame_size, loss_acceptance,
  36                      loss_acceptance_type, traffic_type):
  37         """Runs the traffic and evaluate the measured results.
  38
  39         :param rate: Offered traffic load.
  40         :param frame_size: Size of frame.
  41         :param loss_acceptance: Permitted drop ratio or frames count.
  42         :param loss_acceptance_type: Type of permitted loss.
  43         :param traffic_type: Traffic profile ([2,3]-node-L[2,3], ...).
  44         :type rate: int
  45         :type frame_size: str
  46         :type loss_acceptance: float
  47         :type loss_acceptance_type: LossAcceptanceType
  48         :type traffic_type: str
  49         :returns: Drop threshold exceeded? (True/False)
  50         :rtype: bool
  51         :raises: NotImplementedError if TG is not supported.
  52         :raises: RuntimeError if TG is not specified.
  53         """
  54         # we need instance of TrafficGenerator instantiated by Robot Framework
  55         # to be able to use trex_stl-*()
  56         tg_instance = BuiltIn().get_library_instance(
  57             'resources.libraries.python.TrafficGenerator')
  58
  59         if tg_instance.node['subtype'] is None:
  60             raise RuntimeError('TG subtype not defined')
  61         elif tg_instance.node['subtype'] == NodeSubTypeTG.TREX:
  62             unit_rate = str(rate) + self.get_rate_type_str()
  63             tg_instance.trex_stl_start_remote_exec(self.get_duration(),
  64                                                    unit_rate, frame_size,
  65                                                    traffic_type)
  66             loss = tg_instance.get_loss()
  67             sent = tg_instance.get_sent()
  68             if self.loss_acceptance_type_is_percentage():
  69                 loss = (float(loss) / float(sent)) * 100
  70
  71             logger.trace("comparing: {} < {} {}".format(loss,
  72                                                         loss_acceptance,
  73                                                         loss_acceptance_type))
  74             if float(loss) > float(loss_acceptance):
  75                 return False
  76             else:
  77                 return True
  78         else:
  79             raise NotImplementedError("TG subtype not supported")
  80
  81     def get_latency(self):
  82         """Returns min/avg/max latency.
  83
  84         :returns: Latency stats.
  85         :rtype: list
  86         """
  87         tg_instance = BuiltIn().get_library_instance(
  88             'resources.libraries.python.TrafficGenerator')
  89         return tg_instance.get_latency_int()
  90
  91
  92 class TrafficGenerator(object):
  93     """Traffic Generator."""
  94
  95     # use one instance of TrafficGenerator for all tests in test suite
  96     ROBOT_LIBRARY_SCOPE = 'TEST SUITE'
  97
  98     def __init__(self):
  99         self._result = None
 100         self._loss = None
 101         self._sent = None
 102         self._latency = None
 103         self._received = None
 104         self._node = None
 105         # T-REX interface order mapping
 106         self._ifaces_reordered = 0
 107
 108     @property
 109     def node(self):
 110         """Getter.
 111
 112         :returns: Traffic generator node.
 113         :rtype: dict
 114         """
 115         return self._node
 116
 117     def get_loss(self):
 118         """Return number of lost packets.
 119
 120         :returns: Number of lost packets.
 121         :rtype: str
 122         """
 123         return self._loss
 124
 125     def get_sent(self):
 126         """Return number of sent packets.
 127
 128         :returns: Number of sent packets.
 129         :rtype: str
 130         """
 131         return self._sent
 132
 133     def get_received(self):
 134         """Return number of received packets.
 135
 136         :returns: Number of received packets.
 137         :rtype: str
 138         """
 139         return self._received
 140
 141     def get_latency_int(self):
 142         """Return rounded min/avg/max latency.
 143
 144         :returns: Latency stats.
 145         :rtype: list
 146         """
 147         return self._latency
 148
 149     def initialize_traffic_generator(self, tg_node, tg_if1, tg_if2,
 150                                      tg_if1_adj_node, tg_if1_adj_if,
 151                                      tg_if2_adj_node, tg_if2_adj_if,
 152                                      test_type,
 153                                      tg_if1_dst_mac=None, tg_if2_dst_mac=None):
 154         """TG initialization.
 155
 156         :param tg_node: Traffic generator node.
 157         :param tg_if1: TG - name of first interface.
 158         :param tg_if2: TG - name of second interface.
 159         :param tg_if1_adj_node: TG if1 adjecent node.
 160         :param tg_if1_adj_if: TG if1 adjecent interface.
 161         :param tg_if2_adj_node: TG if2 adjecent node.
 162         :param tg_if2_adj_if: TG if2 adjecent interface.
 163         :param test_type: 'L2' or 'L3' - src/dst MAC address.
 164         :param tg_if1_dst_mac: Interface 1 destination MAC address.
 165         :param tg_if2_dst_mac: Interface 2 destination MAC address.
 166         :type tg_node: dict
 167         :type tg_if1: str
 168         :type tg_if2: str
 169         :type tg_if1_adj_node: dict
 170         :type tg_if1_adj_if: str
 171         :type tg_if2_adj_node: dict
 172         :type tg_if2_adj_if: str
 173         :type test_type: str
 174         :type tg_if1_dst_mac: str
 175         :type tg_if2_dst_mac: str
 176         :returns: nothing
 177         :raises: RuntimeError in case of issue during initialization.
 178         """
 179
 180         topo = Topology()
 181
 182         if tg_node['type'] != NodeType.TG:
 183             raise RuntimeError('Node type is not a TG')
 184         self._node = tg_node
 185
 186         if tg_node['subtype'] == NodeSubTypeTG.TREX:
 187             trex_path = "/opt/trex-core-2.22"
 188
 189             ssh = SSH()
 190             ssh.connect(tg_node)
 191
 192             (ret, stdout, stderr) = ssh.exec_command(
 193                 "sudo -E sh -c '{}/resources/tools/t-rex/"
 194                 "t-rex-installer.sh'".format(Constants.REMOTE_FW_DIR),
 195                 timeout=1800)
 196             if int(ret) != 0:
 197                 logger.error('trex installation failed: {0}'.format(
 198                     stdout + stderr))
 199                 raise RuntimeError('Installation of TG failed')
 200
 201             if1_pci = topo.get_interface_pci_addr(tg_node, tg_if1)
 202             if2_pci = topo.get_interface_pci_addr(tg_node, tg_if2)
 203             if1_mac = topo.get_interface_mac(tg_node, tg_if1)
 204             if2_mac = topo.get_interface_mac(tg_node, tg_if2)
 205
 206             if test_type == 'L2':
 207                 if1_adj_mac = if2_mac
 208                 if2_adj_mac = if1_mac
 209             elif test_type == 'L3':
 210                 if1_adj_mac = topo.get_interface_mac(tg_if1_adj_node,
 211                                                      tg_if1_adj_if)
 212                 if2_adj_mac = topo.get_interface_mac(tg_if2_adj_node,
 213                                                      tg_if2_adj_if)
 214             else:
 215                 raise ValueError("test_type unknown")
 216
 217             if tg_if1_dst_mac is not None and tg_if2_dst_mac is not None:
 218                 if1_adj_mac = tg_if1_dst_mac
 219                 if2_adj_mac = tg_if2_dst_mac
 220
 221             if min(if1_pci, if2_pci) != if1_pci:
 222                 if1_mac, if2_mac = if2_mac, if1_mac
 223                 if1_pci, if2_pci = if2_pci, if1_pci
 224                 if1_adj_mac, if2_adj_mac = if2_adj_mac, if1_adj_mac
 225                 self._ifaces_reordered = 1
 226
 227             if1_mac_hex = "0x"+if1_mac.replace(":", ",0x")
 228             if2_mac_hex = "0x"+if2_mac.replace(":", ",0x")
 229             if1_adj_mac_hex = "0x"+if1_adj_mac.replace(":", ",0x")
 230             if2_adj_mac_hex = "0x"+if2_adj_mac.replace(":", ",0x")
 231
 232             (ret, stdout, stderr) = ssh.exec_command(
 233                 "sudo sh -c 'cat << EOF > /etc/trex_cfg.yaml\n"
 234                 "- port_limit      : 2\n"
 235                 "  version         : 2\n"
 236                 "  interfaces      : [\"{}\",\"{}\"]\n"
 237                 "  port_info       :\n"
 238                 "          - dest_mac        :   [{}]\n"
 239                 "            src_mac         :   [{}]\n"
 240                 "          - dest_mac        :   [{}]\n"
 241                 "            src_mac         :   [{}]\n"
 242                 "EOF'"\
 243                 .format(if1_pci, if2_pci,
 244                         if1_adj_mac_hex, if1_mac_hex,
 245                         if2_adj_mac_hex, if2_mac_hex))
 246             if int(ret) != 0:
 247                 logger.error("failed to create t-rex config: {}"\
 248                 .format(stdout + stderr))
 249                 raise RuntimeError('trex config generation error')
 250
 251             max_startup_retries = 3
 252             while max_startup_retries > 0:
 253                 # kill T-rex only if it is already running
 254                 (ret, _, _) = ssh.exec_command(
 255                     "sh -c 'pgrep t-rex && sudo pkill t-rex && sleep 3'")
 256
 257                 # configure T-rex
 258                 (ret, stdout, stderr) = ssh.exec_command(
 259                     "sh -c 'cd {0}/scripts/ && sudo ./trex-cfg'"\
 260                     .format(trex_path))
 261                 if int(ret) != 0:
 262                     logger.error('trex-cfg failed: {0}'.format(stdout + stderr))
 263                     raise RuntimeError('trex-cfg failed')
 264
 265                 # start T-rex
 266                 (ret, _, _) = ssh.exec_command(
 267                     "sh -c 'cd {0}/scripts/ && "
 268                     "sudo nohup ./t-rex-64 -i -c 7 --iom 0 > /dev/null 2>&1 &'"
 269                     "> /dev/null"\
 270                     .format(trex_path))
 271                 if int(ret) != 0:
 272                     raise RuntimeError('t-rex-64 startup failed')
 273
 274                 # get T-rex server info
 275                 (ret, _, _) = ssh.exec_command(
 276                     "sh -c 'sleep 3; "
 277                     "{0}/resources/tools/t-rex/t-rex-server-info.py'"\
 278                     .format(Constants.REMOTE_FW_DIR),
 279                     timeout=120)
 280                 if int(ret) == 0:
 281                     # If we get info T-rex is running
 282                     return
 283                 # try again
 284                 max_startup_retries -= 1
 285             # after max retries T-rex is still not responding to API
 286             # critical error occured
 287             raise RuntimeError('t-rex-64 startup failed')
 288
 289     @staticmethod
 290     def teardown_traffic_generator(node):
 291         """TG teardown.
 292
 293         :param node: Traffic generator node.
 294         :type node: dict
 295         :returns: nothing
 296         :raises: RuntimeError if T-rex teardown failed.
 297         :raises: RuntimeError if node type is not a TG.
 298         """
 299         if node['type'] != NodeType.TG:
 300             raise RuntimeError('Node type is not a TG')
 301         if node['subtype'] == NodeSubTypeTG.TREX:
 302             ssh = SSH()
 303             ssh.connect(node)
 304             (ret, stdout, stderr) = ssh.exec_command(
 305                 "sh -c 'sudo pkill t-rex && sleep 3'")
 306             if int(ret) != 0:
 307                 logger.error('pkill t-rex failed: {0}'.format(stdout + stderr))
 308                 raise RuntimeError('pkill t-rex failed')
 309
 310     @staticmethod
 311     def trex_stl_stop_remote_exec(node):
 312         """Execute script on remote node over ssh to stop running traffic.
 313
 314         :param node: T-REX generator node.
 315         :type node: dict
 316         :returns: Nothing
 317         :raises: RuntimeError if stop traffic script fails.
 318         """
 319         ssh = SSH()
 320         ssh.connect(node)
 321
 322         (ret, stdout, stderr) = ssh.exec_command(
 323             "sh -c '{}/resources/tools/t-rex/"
 324             "t-rex-stateless-stop.py'".format(Constants.REMOTE_FW_DIR))
 325         logger.trace(ret)
 326         logger.trace(stdout)
 327         logger.trace(stderr)
 328
 329         if int(ret) != 0:
 330             raise RuntimeError('T-rex stateless runtime error')
 331
 332     def trex_stl_start_remote_exec(self, duration, rate, framesize,
 333                                    traffic_type, async_call=False,
 334                                    latency=True, warmup_time=5):
 335         """Execute script on remote node over ssh to start traffic.
 336
 337         :param duration: Time expresed in seconds for how long to send traffic.
 338         :param rate: Traffic rate expressed with units (pps, %)
 339         :param framesize: L2 frame size to send (without padding and IPG).
 340         :param traffic_type: Traffic profile.
 341         :param async_call: If enabled then don't wait for all incomming trafic.
 342         :param latency: With latency measurement.
 343         :param warmup_time: Warmup time period.
 344         :type duration: int
 345         :type rate: str
 346         :type framesize: int
 347         :type traffic_type: str
 348         :type async_call: bool
 349         :type latency: bool
 350         :type warmup_time: int
 351         :returns: Nothing
 352         :raises: NotImplementedError if traffic type is not supported.
 353         :raises: RuntimeError in case of TG driver issue.
 354         """
 355         ssh = SSH()
 356         ssh.connect(self._node)
 357
 358         _p0 = 1
 359         _p1 = 2
 360         _async = "--async" if async_call else ""
 361         _latency = "--latency" if latency else ""
 362
 363         if self._ifaces_reordered != 0:
 364             _p0, _p1 = _p1, _p0
 365
 366         if traffic_type in ["3-node-xconnect", "3-node-bridge"]:
 367             (ret, stdout, stderr) = ssh.exec_command(
 368                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
 369                 "--duration={1} -r {2} -s {3} "
 370                 "--p{4}_src_start_ip 10.10.10.1 "
 371                 "--p{4}_src_end_ip 10.10.10.254 "
 372                 "--p{4}_dst_start_ip 20.20.20.1 "
 373                 "--p{5}_src_start_ip 20.20.20.1 "
 374                 "--p{5}_src_end_ip 20.20.20.254 "
 375                 "--p{5}_dst_start_ip 10.10.10.1 "
 376                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
 377                                                     duration, rate, framesize,
 378                                                     _p0, _p1, _async, _latency,
 379                                                     warmup_time),
 380                 timeout=int(duration)+60)
 381         elif traffic_type in ["3-node-IPv4"]:
 382             (ret, stdout, stderr) = ssh.exec_command(
 383                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
 384                 "--duration={1} -r {2} -s {3} "
 385                 "--p{4}_src_start_ip 10.10.10.2 "
 386                 "--p{4}_src_end_ip 10.10.10.254 "
 387                 "--p{4}_dst_start_ip 20.20.20.2 "
 388                 "--p{5}_src_start_ip 20.20.20.2 "
 389                 "--p{5}_src_end_ip 20.20.20.254 "
 390                 "--p{5}_dst_start_ip 10.10.10.2 "
 391                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
 392                                                     duration, rate, framesize,
 393                                                     _p0, _p1, _async, _latency,
 394                                                     warmup_time),
 395                 timeout=int(duration)+60)
 396         elif traffic_type in ["3-node-IPv4-dst-1"]:
 397             (ret, stdout, stderr) = ssh.exec_command(
 398                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
 399                 "--duration={1} -r {2} -s {3} "
 400                 "--p{4}_src_start_ip 10.0.0.1 "
 401                 "--p{4}_dst_start_ip 20.0.0.0 "
 402                 "--p{4}_dst_end_ip 20.0.0.0 "
 403                 "--p{5}_src_start_ip 20.0.0.1 "
 404                 "--p{5}_dst_start_ip 10.0.0.0 "
 405                 "--p{5}_dst_end_ip 10.0.0.0 "
 406                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
 407                                                     duration, rate, framesize,
 408                                                     _p0, _p1, _async, _latency,
 409                                                     warmup_time),
 410                 timeout=int(duration)+60)
 411         elif traffic_type in ["3-node-IPv4-dst-100"]:
 412             (ret, stdout, stderr) = ssh.exec_command(
 413                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
 414                 "--duration={1} -r {2} -s {3} "
 415                 "--p{4}_src_start_ip 10.0.0.1 "
 416                 "--p{4}_dst_start_ip 20.0.0.0 "
 417                 "--p{4}_dst_end_ip 20.0.0.99 "
 418                 "--p{5}_src_start_ip 20.0.0.1 "
 419                 "--p{5}_dst_start_ip 10.0.0.0 "
 420                 "--p{5}_dst_end_ip 10.0.0.99 "
 421                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
 422                                                     duration, rate, framesize,
 423                                                     _p0, _p1, _async, _latency,
 424                                                     warmup_time),
 425                 timeout=int(duration)+60)
 426         elif traffic_type in ["3-node-IPv4-dst-1000"]:
 427             (ret, stdout, stderr) = ssh.exec_command(
 428                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
 429                 "--duration={1} -r {2} -s {3} "
 430                 "--p{4}_src_start_ip 10.0.0.1 "
 431                 "--p{4}_dst_start_ip 20.0.0.0 "
 432                 "--p{4}_dst_end_ip 20.0.3.231 "
 433                 "--p{5}_src_start_ip 20.0.0.1 "
 434                 "--p{5}_dst_start_ip 10.0.0.0 "
 435                 "--p{5}_dst_end_ip 10.0.3.231 "
 436                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
 437                                                     duration, rate, framesize,
 438                                                     _p0, _p1, _async, _latency,
 439                                                     warmup_time),
 440                 timeout=int(duration)+60)
 441         elif traffic_type in ["3-node-IPv4-dst-10000"]:
 442             (ret, stdout, stderr) = ssh.exec_command(
 443                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
 444                 "--duration={1} -r {2} -s {3} "
 445                 "--p{4}_src_start_ip 10.0.0.1 "
 446                 "--p{4}_dst_start_ip 20.0.0.0 "
 447                 "--p{4}_dst_end_ip 20.0.39.15 "
 448                 "--p{5}_src_start_ip 20.0.0.1 "
 449                 "--p{5}_dst_start_ip 10.0.0.0 "
 450                 "--p{5}_dst_end_ip 10.0.39.15 "
 451                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
 452                                                     duration, rate, framesize,
 453                                                     _p0, _p1, _async, _latency,
 454                                                     warmup_time),
 455                 timeout=int(duration)+60)
 456         elif traffic_type in ["3-node-IPv4-dst-100000"]:
 457             (ret, stdout, stderr) = ssh.exec_command(
 458                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
 459                 "--duration={1} -r {2} -s {3} "
 460                 "--p{4}_src_start_ip 10.0.0.1 "
 461                 "--p{4}_dst_start_ip 20.0.0.0 "
 462                 "--p{4}_dst_end_ip 20.1.134.159 "
 463                 "--p{5}_src_start_ip 20.0.0.1 "
 464                 "--p{5}_dst_start_ip 10.0.0.0 "
 465                 "--p{5}_dst_end_ip 10.1.134.159 "
 466                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
 467                                                     duration, rate, framesize,
 468                                                     _p0, _p1, _async, _latency,
 469                                                     warmup_time),
 470                 timeout=int(duration)+60)
 471         elif traffic_type in ["3-node-IPv4-dst-1000000"]:
 472             (ret, stdout, stderr) = ssh.exec_command(
 473                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
 474                 "--duration={1} -r {2} -s {3} "
 475                 "--p{4}_src_start_ip 10.0.0.1 "
 476                 "--p{4}_dst_start_ip 20.0.0.0 "
 477                 "--p{4}_dst_end_ip 20.15.66.63 "
 478                 "--p{5}_src_start_ip 20.0.0.1 "
 479                 "--p{5}_dst_start_ip 10.0.0.0 "
 480                 "--p{5}_dst_end_ip 10.15.66.63 "
 481                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
 482                                                     duration, rate, framesize,
 483                                                     _p0, _p1, _async, _latency,
 484                                                     warmup_time),
 485                 timeout=int(duration)+60)
 486         elif traffic_type in ["3-node-IPv6"]:
 487             (ret, stdout, stderr) = ssh.exec_command(
 488                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
 489                 "--duration={1} -r {2} -s {3} -6 "
 490                 "--p{4}_src_start_ip 2001:1::2 "
 491                 "--p{4}_src_end_ip 2001:1::FE "
 492                 "--p{4}_dst_start_ip 2001:2::2 "
 493                 "--p{5}_src_start_ip 2001:2::2 "
 494                 "--p{5}_src_end_ip 2001:2::FE "
 495                 "--p{5}_dst_start_ip 2001:1::2 "
 496                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
 497                                                     duration, rate, framesize,
 498                                                     _p0, _p1, _async, _latency,
 499                                                     warmup_time),
 500                 timeout=int(duration)+60)
 501         elif traffic_type in ["3-node-IPv6-dst-10000"]:
 502             (ret, stdout, stderr) = ssh.exec_command(
 503                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
 504                 "--duration={1} -r {2} -s {3} -6 "
 505                 "--p{4}_src_start_ip 2001:1::1 "
 506                 "--p{4}_dst_start_ip 2001:2::0 "
 507                 "--p{4}_dst_end_ip 2001:2::270F "
 508                 "--p{5}_src_start_ip 2001:2::1 "
 509                 "--p{5}_dst_start_ip 2001:1::0 "
 510                 "--p{5}_dst_end_ip 2001:1::270F "
 511                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
 512                                                     duration, rate, framesize,
 513                                                     _p0, _p1, _async, _latency,
 514                                                     warmup_time),
 515                 timeout=int(duration)+60)
 516         elif traffic_type in ["3-node-IPv6-dst-100000"]:
 517             (ret, stdout, stderr) = ssh.exec_command(
 518                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
 519                 "--duration={1} -r {2} -s {3} -6 "
 520                 "--p{4}_src_start_ip 2001:1::1 "
 521                 "--p{4}_dst_start_ip 2001:2::0 "
 522                 "--p{4}_dst_end_ip 2001:2::1:869F "
 523                 "--p{5}_src_start_ip 2001:2::1 "
 524                 "--p{5}_dst_start_ip 2001:1::0 "
 525                 "--p{5}_dst_end_ip 2001:1::1:869F "
 526                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
 527                                                     duration, rate, framesize,
 528                                                     _p0, _p1, _async, _latency,
 529                                                     warmup_time),
 530                 timeout=int(duration)+60)
 531         elif traffic_type in ["3-node-IPv6-dst-1000000"]:
 532             (ret, stdout, stderr) = ssh.exec_command(
 533                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
 534                 "--duration={1} -r {2} -s {3} -6 "
 535                 "--p{4}_src_start_ip 2001:1::1 "
 536                 "--p{4}_dst_start_ip 2001:2::0 "
 537                 "--p{4}_dst_end_ip 2001:2::F:423F "
 538                 "--p{5}_src_start_ip 2001:2::1 "
 539                 "--p{5}_dst_start_ip 2001:1::0 "
 540                 "--p{5}_dst_end_ip 2001:1::F:423F "
 541                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
 542                                                     duration, rate, framesize,
 543                                                     _p0, _p1, _async, _latency,
 544                                                     warmup_time),
 545                 timeout=int(duration)+60)
 546         elif traffic_type in ["2-node-bridge"]:
 547             (ret, stdout, stderr) = ssh.exec_command(
 548                 "sh -c '{0}/resources/tools/t-rex/t-rex-stateless.py "
 549                 "--duration={1} -r {2} -s {3} "
 550                 "--p{4}_src_start_ip 10.10.10.2 "
 551                 "--p{4}_src_end_ip 10.10.10.254 "
 552                 "--p{4}_dst_start_ip 20.20.20.2 "
 553                 "--p{5}_src_start_ip 20.20.20.2 "
 554                 "--p{5}_src_end_ip 20.20.20.254 "
 555                 "--p{5}_dst_start_ip 10.10.10.2 "
 556                 "{6} {7} --warmup_time={8}'".format(Constants.REMOTE_FW_DIR,
 557                                                     duration, rate, framesize,
 558                                                     _p0, _p1, _async, _latency,
 559                                                     warmup_time),
 560                 timeout = int(duration) + 60)
 561         else:
 562             raise NotImplementedError('Unsupported traffic type')
 563
 564         logger.trace(ret)
 565         logger.trace(stdout)
 566         logger.trace(stderr)
 567
 568         if int(ret) != 0:
 569             raise RuntimeError('T-rex stateless runtime error')
 570         elif async_call:
 571             #no result
 572             self._received = None
 573             self._sent = None
 574             self._loss = None
 575             self._latency = None
 576         else:
 577             # last line from console output
 578             line = stdout.splitlines()[-1]
 579
 580             self._result = line
 581             logger.info('TrafficGen result: {0}'.format(self._result))
 582
 583             self._received = self._result.split(', ')[1].split('=')[1]
 584             self._sent = self._result.split(', ')[2].split('=')[1]
 585             self._loss = self._result.split(', ')[3].split('=')[1]
 586
 587             self._latency = []
 588             self._latency.append(self._result.split(', ')[4].split('=')[1])
 589             self._latency.append(self._result.split(', ')[5].split('=')[1])
 590
 591     def stop_traffic_on_tg(self):
 592         """Stop all traffic on TG.
 593
 594         :returns: Nothing
 595         :raises: RuntimeError if TG is not set.
 596         """
 597         if self._node is None:
 598             raise RuntimeError("TG is not set")
 599         if self._node['subtype'] == NodeSubTypeTG.TREX:
 600             self.trex_stl_stop_remote_exec(self._node)
 601
 602     def send_traffic_on_tg(self, duration, rate, framesize,
 603                            traffic_type, warmup_time=5, async_call=False,
 604                            latency=True):
 605         """Send traffic from all configured interfaces on TG.
 606
 607         :param duration: Duration of test traffic generation in seconds.
 608         :param rate: Offered load per interface (e.g. 1%, 3gbps, 4mpps, ...).
 609         :param framesize: Frame size (L2) in Bytes.
 610         :param traffic_type: Traffic profile.
 611         :param warmup_time: Warmup phase in seconds.
 612         :param async_call: Async mode.
 613         :param latency: With latency measurement.
 614         :type duration: str
 615         :type rate: str
 616         :type framesize: str
 617         :type traffic_type: str
 618         :type warmup_time: int
 619         :type async_call: bool
 620         :type latency: bool
 621         :returns: TG output.
 622         :rtype: str
 623         :raises: RuntimeError if TG is not set.
 624         :raises: RuntimeError if node is not TG or subtype is not specified.
 625         :raises: NotImplementedError if TG is not supported.
 626         """
 627
 628         node = self._node
 629         if node is None:
 630             raise RuntimeError("TG is not set")
 631
 632         if node['type'] != NodeType.TG:
 633             raise RuntimeError('Node type is not a TG')
 634
 635         if node['subtype'] is None:
 636             raise RuntimeError('TG subtype not defined')
 637         elif node['subtype'] == NodeSubTypeTG.TREX:
 638             self.trex_stl_start_remote_exec(duration, rate, framesize,
 639                                             traffic_type, async_call, latency,
 640                                             warmup_time=warmup_time)
 641         else:
 642             raise NotImplementedError("TG subtype not supported")
 643
 644         return self._result
 645
 646     def no_traffic_loss_occurred(self):
 647         """Fail if loss occurred in traffic run.
 648
 649         :returns: nothing
 650         :raises: Exception if loss occured.
 651         """
 652         if self._loss is None:
 653             raise Exception('The traffic generation has not been issued')
 654         if self._loss != '0':
 655             raise Exception('Traffic loss occurred: {0}'.format(self._loss))
 656
 657     def partial_traffic_loss_accepted(self, loss_acceptance,
 658                                       loss_acceptance_type):
 659         """Fail if loss is higher then accepted in traffic run.
 660
 661         :param loss_acceptance: Permitted drop ratio or frames count.
 662         :param loss_acceptance_type: Type of permitted loss.
 663         :type loss_acceptance: float
 664         :type loss_acceptance_type: LossAcceptanceType
 665         :returns: nothing
 666         :raises: Exception if loss is above acceptance criteria.
 667         """
 668         if self._loss is None:
 669             raise Exception('The traffic generation has not been issued')
 670
 671         if loss_acceptance_type == 'percentage':
 672             loss = (float(self._loss) / float(self._sent)) * 100
 673         elif loss_acceptance_type == 'frames':
 674             loss = float(self._loss)
 675         else:
 676             raise Exception('Loss acceptance type not supported')
 677
 678         if loss > float(loss_acceptance):
 679             raise Exception("Traffic loss {} above loss acceptance: {}".format(
 680                 loss, loss_acceptance))