3 # Copyright (c) 2016 Cisco and/or its affiliates.
4 # Licensed under the Apache License, Version 2.0 (the "License");
5 # you may not use this file except in compliance with the License.
6 # You may obtain a copy of the License at:
8 # http://www.apache.org/licenses/LICENSE-2.0
10 # Unless required by applicable law or agreed to in writing, software
11 # distributed under the License is distributed on an "AS IS" BASIS,
12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 # See the License for the specific language governing permissions and
14 # limitations under the License.
16 """This script uses T-REX stateless API to drive t-rex instance.
19 - T-REX: https://github.com/cisco-system-traffic-generator/trex-core
20 - compiled and running T-REX process (eg. ./t-rex-64 -i -c 4)
21 - trex_stl_lib.api library
22 - Script must be executed on a node with T-REX instance
23 - 2 interfaces must be configured in configuretion file /etc/trex_cfg.yaml
25 ##################### Example of /etc/trex_cfg.yaml ##########################
26 - port_limit : 2 # numbers of ports to use
28 interfaces : ["84:00.0","84:00.1"] # PCI address of interfaces
29 port_info : # set eth mac addr
30 - dest_mac : [0x90,0xe2,0xba,0x1f,0x97,0xd5] # port 0
31 src_mac : [0x90,0xe2,0xba,0x1f,0x97,0xd4]
32 - dest_mac : [0x90,0xe2,0xba,0x1f,0x97,0xd4] # port 1
33 src_mac : [0x90,0xe2,0xba,0x1f,0x97,0xd5]
34 ##############################################################################
37 1. Configure traffic on running T-REX instance
38 2. Clear statistics on all ports
39 3. Ctart traffic with specified duration
40 4. Print statistics to stdout
51 sys.path.insert(0, "/opt/trex-core-2.06/scripts/automation/"+\
52 "trex_control_plane/stl/")
53 from trex_stl_lib.api import *
55 stream_table = {'IMIX_v4_1': [{'size': 64, 'pps': 28, 'isg':0},
56 {'size': 570, 'pps': 16, 'isg':0.1},
57 {'size': 1518, 'pps': 4, 'isg':0.2}]
60 def generate_payload(length):
63 :param length: Length of payload.
65 :return: Payload filled with chars.
70 alphabet_size = len(string.letters)
71 for i in range(length):
72 word += string.letters[(i % alphabet_size)]
77 def get_start_end_ipv6(start_ip, end_ip):
78 """Get start and end host from IPv6 as integer.
80 :param start_ip: Start IPv6.
81 :param end_ip: End IPv6.
82 :type start_ip: string
84 :return: Start host, end host.
89 ip1 = socket.inet_pton(socket.AF_INET6, start_ip)
90 ip2 = socket.inet_pton(socket.AF_INET6, end_ip)
92 hi1, lo1 = struct.unpack('!QQ', ip1)
93 hi2, lo2 = struct.unpack('!QQ', ip2)
95 if ((hi1 << 64) | lo1) > ((hi2 << 64) | lo2):
96 print "IPv6: start_ip is greater then end_ip"
99 max_p1 = abs(int(lo1) - int(lo2)) + 1
101 except AddressValueError as ex_error:
105 return base_p1, max_p1
107 def create_streams_v46(base_pkt_a, base_pkt_b, vm1, vm2, frame_size):
108 """Create STLStream streams
110 :param base_pkt_a: Base packet a for stream_a
111 :param base_pkt_b: Base packet b for stream_b
112 :param vm1: vm for stream_a
113 :param vm2: vm for stream_b
114 :param frame_size: frame size or name of traffic profile
115 :type base_pkt_a: Eth (scapy)
116 :type base_pkt_b: Eth (scapy)
117 :type vm1: STLScVmRaw
118 :type vm2: STLScVmRaw
119 :frame_size: int or string
120 :return: stream_a, stream_b, stream_a_latency, stream_b_latency
121 :rtype: STLStream, STLStream, STLStream, STLStream
124 if type(frame_size) is int:
126 fsize_no_fcs = frame_size - 4 # no FCS
127 pkt_a = STLPktBuilder(pkt=base_pkt_a/generate_payload(
128 max(0, fsize_no_fcs-len(base_pkt_a))), vm=vm1)
129 pkt_b = STLPktBuilder(pkt=base_pkt_b/generate_payload(
130 max(0, fsize_no_fcs-len(base_pkt_b))), vm=vm2)
131 pkt_lat_a = STLPktBuilder(pkt=base_pkt_a/generate_payload(
132 max(0, fsize_no_fcs-len(base_pkt_a))))
133 pkt_lat_b = STLPktBuilder(pkt=base_pkt_b/generate_payload(
134 max(0, fsize_no_fcs-len(base_pkt_b))))
135 lat_stream1 = STLStream(packet=pkt_lat_a,
136 flow_stats=STLFlowLatencyStats(pg_id=0),
137 mode=STLTXCont(pps=1000))
138 # second traffic stream with a phase of 10ns (inter stream gap)
139 lat_stream2 = STLStream(packet=pkt_lat_b,
141 flow_stats=STLFlowLatencyStats(pg_id=1),
142 mode=STLTXCont(pps=1000))
144 stream1 = STLStream(packet=pkt_a,
145 mode=STLTXCont(pps=1000))
146 # second traffic stream with a phase of 10ns (inter stream gap)
147 stream2 = STLStream(packet=pkt_b,
149 mode=STLTXCont(pps=1000))
150 elif type(frame_size) is str:
156 for x in stream_table[frame_size]:
157 fsize_no_fcs = x['size'] - 4 # no FCS
158 pkt_a = STLPktBuilder(pkt=base_pkt_a/generate_payload(
159 max(0, fsize_no_fcs-len(base_pkt_a))), vm=vm1)
160 pkt_b = STLPktBuilder(pkt=base_pkt_b/generate_payload(
161 max(0, fsize_no_fcs-len(base_pkt_b))), vm=vm2)
163 stream1.append(STLStream(packet=pkt_a,
165 mode=STLTXCont(pps=x['pps'])))
166 stream2.append(STLStream(packet=pkt_b,
168 mode=STLTXCont(pps=x['pps'])))
171 raise ValueError("Unknown frame_size type")
173 return (stream1, stream2, lat_stream1, lat_stream2)
175 def create_streams(traffic_options, frame_size=64):
176 """Create two IP packets to be used in stream.
178 :param traffic_options: Parameters for packets.
179 :param frame_size: Size of L2 frame.
180 :type traffic_options: list
181 :type frame_size: int
182 :return: Packet instances.
183 :rtype: Tuple of STLPktBuilder
186 if type(frame_size) is int and frame_size < 64:
187 print_error("Frame min. size is 64B")
190 p1_src_start_ip = traffic_options['p1_src_start_ip']
191 p1_src_end_ip = traffic_options['p1_src_end_ip']
192 p1_dst_start_ip = traffic_options['p1_dst_start_ip']
193 p2_src_start_ip = traffic_options['p2_src_start_ip']
194 p2_src_end_ip = traffic_options['p2_src_end_ip']
195 p2_dst_start_ip = traffic_options['p2_dst_start_ip']
197 base_pkt_a = Ether()/IP(src=p1_src_start_ip, dst=p1_dst_start_ip, proto=61)
198 base_pkt_b = Ether()/IP(src=p2_src_start_ip, dst=p2_dst_start_ip, proto=61)
200 # The following code applies raw instructions to packet (IP src increment).
201 # It splits the generated traffic by "ip_src" variable to cores and fix
202 # IPv4 header checksum.
203 vm1 = STLScVmRaw([STLVmFlowVar(name="src",
204 min_value=p1_src_start_ip,
205 max_value=p1_src_end_ip,
207 STLVmWrFlowVar(fv_name="src", pkt_offset="IP.src"),
208 STLVmFixIpv4(offset="IP"),
209 ], split_by_field="src")
210 # The following code applies raw instructions to packet (IP src increment).
211 # It splits the generated traffic by "ip_src" variable to cores and fix
212 # IPv4 header checksum.
213 vm2 = STLScVmRaw([STLVmFlowVar(name="src",
214 min_value=p2_src_start_ip,
215 max_value=p2_src_end_ip,
217 STLVmWrFlowVar(fv_name="src", pkt_offset="IP.src"),
218 STLVmFixIpv4(offset="IP"),
219 ], split_by_field="src")
221 return create_streams_v46(base_pkt_a, base_pkt_b, vm1, vm2, frame_size)
224 def create_streams_v6(traffic_options, frame_size=78):
225 """Create two IPv6 packets to be used in stream.
227 :param traffic_options: Parameters for packets.
228 :param frame_size: Size of L2 frame.
229 :type traffic_options: List
230 :type frame_size: int
231 :return: Packet instances.
232 :rtype: Tuple of STLPktBuilder
235 if type(frame_size) is int and frame_size < 78:
236 print_error("Frame min. size is 78B")
239 p1_src_start_ip = traffic_options['p1_src_start_ip']
240 p1_src_end_ip = traffic_options['p1_src_end_ip']
241 p1_dst_start_ip = traffic_options['p1_dst_start_ip']
242 p2_src_start_ip = traffic_options['p2_src_start_ip']
243 p2_src_end_ip = traffic_options['p2_src_end_ip']
244 p2_dst_start_ip = traffic_options['p2_dst_start_ip']
246 base_p1, max_p1 = get_start_end_ipv6(p1_src_start_ip, p1_src_end_ip)
247 base_p2, max_p2 = get_start_end_ipv6(p2_src_start_ip, p2_src_end_ip)
249 base_pkt_a = Ether()/IPv6(src=p1_src_start_ip, dst=p1_dst_start_ip)
250 base_pkt_b = Ether()/IPv6(src=p2_src_start_ip, dst=p2_dst_start_ip)
252 # The following code applies raw instructions to packet (IP src increment).
253 # It splits the generated traffic by "ip_src" variable to cores
254 vm1 = STLScVmRaw([STLVmFlowVar(name="ipv6_src",
256 max_value=max_p1+base_p1,
258 STLVmWrFlowVar(fv_name="ipv6_src", pkt_offset="IPv6.src",
261 , split_by_field="ipv6_src")
263 # The following code applies raw instructions to packet (IP src increment).
264 # It splits the generated traffic by "ip_src" variable to cores
265 vm2 = STLScVmRaw([STLVmFlowVar(name="ipv6_src",
267 max_value=max_p2+base_p2,
269 STLVmWrFlowVar(fv_name="ipv6_src", pkt_offset="IPv6.src",
272 , split_by_field="ipv6_src")
274 return create_streams_v46(base_pkt_a, base_pkt_b, vm1, vm2, frame_size)
276 def simple_burst(stream_a, stream_b, stream_lat_a, stream_lat_b, duration, rate,
277 warmup_time, async_start, latency):
278 """Run the traffic with specific parameters.
280 :param pkt_a: Base packet for stream 1.
281 :param pkt_b: Base packet for stream 2.
282 :param pkt_lat_a: Base packet for latency stream 1.
283 :param pkt_lat_b: Base packet for latency stream 2.
284 :param duration: Duration of traffic run in seconds (-1=infinite).
285 :param rate: Rate of traffic run [percentage, pps, bps].
286 :param warmup_time: Warm up duration.
287 :param async_start: Start the traffic and exit.
288 :param latency: With latency stats.
289 :type pkt_a: STLPktBuilder
290 :type pkt_b: STLPktBuilder
291 :type pkt_lat_a: STLPktBuilder
292 :type pkt_lat_b: STLPktBuilder
295 :type warmup_time: int
296 :type async_start: bool
312 # turn this off if too many logs
313 #client.set_verbose("high")
318 # prepare our ports (my machine has 0 <--> 1 with static route)
319 client.reset(ports=[0, 1])
321 client.add_streams(stream_a, ports=[0])
322 client.add_streams(stream_b, ports=[1])
325 client.add_streams(stream_lat_a, ports=[0])
326 client.add_streams(stream_lat_b, ports=[1])
330 # clear the stats before injecting
333 # choose rate and start traffic
334 client.start(ports=[0, 1], mult=rate, duration=warmup_time)
337 client.wait_on_traffic(ports=[0, 1], timeout=(warmup_time+30))
339 if client.get_warnings():
340 for warning in client.get_warnings():
343 # read the stats after the test
344 stats = client.get_stats()
346 print "#####warmup statistics#####"
347 print json.dumps(stats, indent=4,
348 separators=(',', ': '), sort_keys=True)
349 lost_a = stats[0]["opackets"] - stats[1]["ipackets"]
350 lost_b = stats[1]["opackets"] - stats[0]["ipackets"]
352 print "\npackets lost from 0 --> 1: {0} pkts".format(lost_a)
353 print "packets lost from 1 --> 0: {0} pkts".format(lost_b)
355 # clear the stats before injecting
360 # choose rate and start traffic
361 client.start(ports=[0, 1], mult=rate, duration=duration)
365 client.wait_on_traffic(ports=[0, 1], timeout=(duration+30))
367 if client.get_warnings():
368 for warning in client.get_warnings():
371 # read the stats after the test
372 stats = client.get_stats()
374 print "#####statistics#####"
375 print json.dumps(stats, indent=4,
376 separators=(',', ': '), sort_keys=True)
377 lost_a = stats[0]["opackets"] - stats[1]["ipackets"]
378 lost_b = stats[1]["opackets"] - stats[0]["ipackets"]
382 str(stats["latency"][0]["latency"]["total_min"]),\
383 str(stats["latency"][0]["latency"]["average"]),\
384 str(stats["latency"][0]["latency"]["total_max"])))
386 str(stats["latency"][1]["latency"]["total_min"]),\
387 str(stats["latency"][1]["latency"]["average"]),\
388 str(stats["latency"][1]["latency"]["total_max"])))
390 total_sent = stats[0]["opackets"] + stats[1]["opackets"]
391 total_rcvd = stats[0]["ipackets"] + stats[1]["ipackets"]
393 print "\npackets lost from 0 --> 1: {0} pkts".format(lost_a)
394 print "packets lost from 1 --> 0: {0} pkts".format(lost_b)
396 except STLError as ex_error:
397 print_error(str(ex_error))
402 client.disconnect(stop_traffic=False, release_ports=True)
405 print "rate={0}, totalReceived={1}, totalSent={2}, "\
406 "frameLoss={3}, latencyStream0(usec)={4}, "\
407 "latencyStream1(usec)={5}".format(rate, total_rcvd,\
408 total_sent, lost_a+lost_b, lat_a, lat_b)
411 def print_error(msg):
412 """Print error message on stderr.
414 :param msg: Error message to print.
419 sys.stderr.write(msg+'\n')
423 """Parse arguments from cmd line.
425 :return: Parsed arguments.
426 :rtype ArgumentParser
429 parser = argparse.ArgumentParser()
430 parser.add_argument("-d", "--duration", required=True, type=int,
431 help="Duration of traffic run")
432 parser.add_argument("-s", "--frame_size", required=True,
433 help="Size of a Frame without padding and IPG")
434 parser.add_argument("-r", "--rate", required=True,
435 help="Traffic rate with included units (%, pps)")
436 parser.add_argument("-6", "--use_IPv6", action="store_true",
438 help="Use IPv6 traffic profile instead of IPv4")
439 parser.add_argument("--async", action="store_true",
441 help="Non-blocking call of the script")
442 parser.add_argument("--latency", action="store_true",
444 help="Add latency stream")
445 parser.add_argument("-w", "--warmup_time", type=int,
447 help="Traffic warmup time in seconds, 0 = disable")
448 # parser.add_argument("--p1_src_mac",
449 # help="Port 1 source MAC address")
450 # parser.add_argument("--p1_dst_mac",
451 # help="Port 1 destination MAC address")
452 parser.add_argument("--p1_src_start_ip", required=True,
453 help="Port 1 source start IP address")
454 parser.add_argument("--p1_src_end_ip", required=True,
455 help="Port 1 source end IP address")
456 parser.add_argument("--p1_dst_start_ip", required=True,
457 help="Port 1 destination start IP address")
458 # parser.add_argument("--p1_dst_end_ip",
459 # help="Port 1 destination end IP address")
460 # parser.add_argument("--p2_src_mac",
461 # help="Port 2 source MAC address")
462 # parser.add_argument("--p2_dst_mac",
463 # help="Port 2 destination MAC address")
464 parser.add_argument("--p2_src_start_ip", required=True,
465 help="Port 2 source start IP address")
466 parser.add_argument("--p2_src_end_ip", required=True,
467 help="Port 2 source end IP address")
468 parser.add_argument("--p2_dst_start_ip", required=True,
469 help="Port 2 destination start IP address")
470 # parser.add_argument("--p2_dst_end_ip",
471 # help="Port 2 destination end IP address")
473 return parser.parse_args()
481 _duration = args.duration
482 _latency = args.latency
483 if args.frame_size.isdigit():
484 _frame_size = int(args.frame_size)
486 _frame_size = args.frame_size
489 _use_ipv6 = args.use_IPv6
490 _async_call = args.async
491 _warmup_time = args.warmup_time
493 _traffic_options = {}
494 for attr in [a for a in dir(args) if a.startswith('p')]:
495 if getattr(args, attr) is not None:
496 _traffic_options[attr] = getattr(args, attr)
499 # WARNING: Trex limitation to IPv4 only. IPv6 is not yet supported.
500 print_error('IPv6 latency is not supported yet. Running without lat.')
503 stream_a, stream_b, stream_lat_a, stream_lat_b = create_streams_v6(
504 _traffic_options, frame_size=_frame_size)
506 stream_a, stream_b, stream_lat_a, stream_lat_b = create_streams(
507 _traffic_options, frame_size=_frame_size)
509 simple_burst(stream_a, stream_b, stream_lat_a, stream_lat_b,
510 _duration, _rate, _warmup_time, _async_call, _latency)
512 if __name__ == "__main__":