aboutsummaryrefslogtreecommitdiffstats
path: root/docs/testing/user/userguide/advanced.rst
blob: d7dc53f05470eb74c41e1e4ef0474c65ed772ca4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
.. This work is licensed under a Creative Commons Attribution 4.0 International License.
.. SPDX-License-Identifier: CC-BY-4.0
.. (c) Cisco Systems, Inc

==============
Advanced Usage
==============

This section covers a few examples on how to run NFVbench with multiple different settings.
Below are shown the most common and useful use-cases and explained some fields from a default config file.

How to change any NFVbench run configuration (CLI)
--------------------------------------------------
NFVbench always starts with a default configuration which can further be refined (overridden) by the user from the CLI or from REST requests.

At first have a look at the default config:

.. code-block:: bash

    nfvbench --show-default-config

It is sometimes useful derive your own configuration from a copy of the default config:

.. code-block:: bash

    nfvbench --show-default-config > nfvbench.cfg

At this point you can edit the copy by:

- removing any parameter that is not to be changed (since NFVbench will always load the default configuration, default values are not needed)
- edit the parameters that are to be changed changed

A run with the new confguration can then simply be requested using the -c option and by using the actual path of the configuration file
as seen from inside the container (in this example, we assume the current directory is mapped to /tmp/nfvbench in the container):

.. code-block:: bash

    nfvbench -c /tmp/nfvbench/nfvbench.cfg

The same -c option also accepts any valid yaml or json string to override certain parameters without having to create a configuration file.

NFVbench provides many configuration options as optional arguments. For example the number of flows can be specified using the --flow-count option.

The flow count option can be specified in any of 3 ways:

- by providing a confguration file that has the flow_count value to use (-c myconfig.yaml and myconfig.yaml contains 'flow_count: 100k')
- by passing that yaml paremeter inline (-c "flow_count: 100k") or (-c "{flow_count: 100k}")
- by using the flow count optional argument (--flow-count 100k)

Showing the running configuration
---------------------------------

Because configuration parameters can be overriden, it is sometimes useful to show the final configuration (after all oevrrides are done) by using the --show-config option.
This final configuration is also called the "running" configuration.

For example, this will only display the running configuration (without actually running anything):

.. code-block:: bash

    nfvbench -c "{flow_count: 100k, debug: true}" --show-config


Connectivity and Configuration Check
------------------------------------

NFVbench allows to test connectivity to devices used with the selected packet path.
It runs the whole test, but without actually sending any traffic.
It is also a good way to check if everything is configured properly in the configuration file and what versions of components are used.

To verify everything works without sending any traffic, use the --no-traffic option:

.. code-block:: bash

    nfvbench --no-traffic

Used parameters:

* ``--no-traffic`` or ``-0`` : sending traffic from traffic generator is skipped


TRex force restart
------------------

NFVbench allows to restart TRex traffic generator between runs.
It runs the whole test, but restart TRex instance before generating new traffic.

To force restart, use the --restart option:

.. code-block:: bash

    nfvbench --restart

Used parameters:

* ``--restart`` : restart traffic generator (TRex)

Rate Units
^^^^^^^^^^

Parameter ``--rate`` accepts different types of values:

* packets per second (pps, kpps, mpps), e.g. ``1000pps`` or ``10kpps``
* load percentage (%), e.g. ``50%``
* bits per second (bps, kbps, Mbps, Gbps), e.g. ``1Gbps``, ``1000bps``
* NDR/PDR (ndr, pdr, ndr_pdr), e.g. ``ndr_pdr``

NDR/PDR is the default rate when not specified.

Fixed Rate Run
--------------

Fixed rate run is the most basic type of NFVbench usage. It can be used to measure the drop rate with a fixed transmission rate of packets.

This example shows how to run the PVP packet path (which is the default packet path) with multiple different settings:

.. code-block:: bash

    nfvbench -c nfvbench.cfg --no-cleanup --rate 100000pps --duration 30 --interval 15 --json results.json

Used parameters:

* ``-c nfvbench.cfg`` : path to the config file
* ``--no-cleanup`` : resources (networks, VMs, attached ports) are not deleted after test is finished
* ``--rate 100000pps`` : defines rate of packets sent by traffic generator
* ``--duration 30`` : specifies how long should traffic be running in seconds
* ``--interval 15`` : stats are checked and shown periodically (in seconds) in this interval when traffic is flowing
* ``--json results.json`` : collected data are stored in this file after run is finished

.. note:: It is your responsibility to clean up resources if needed when ``--no-cleanup`` parameter is used. You can use the nfvbench_cleanup helper script for that purpose.

The ``--json`` parameter makes it easy to store NFVbench results. The --show-summary (or -ss) option can be used to display the results in a json results file in a text tabular format:

.. code-block:: bash

    nfvbench --show-summary results.json


This example shows how to specify a different packet path:

.. code-block:: bash

    nfvbench -c nfvbench.cfg --rate 1Mbps --inter-node --service-chain PVVP

Used parameters:

* ``-c nfvbench.cfg`` : path to the config file
* ``--rate 1Mbps`` : defines rate of packets sent by traffic generator
* ``--inter-node`` : VMs are created on different compute nodes, works only with PVVP flow
* ``--service-chain PVVP`` or ``-sc PVVP`` : specifies the type of service chain (or packet path) to use

.. note:: When parameter ``--inter-node`` is not used or there aren't enough compute nodes, VMs are on the same compute node.

A fixed rate run can also be used to check the running drop rate while traffic is being generated. In that case the --interval option can be used
to specify the reporting interval in seconds (minimum is 1 second). This can be useful for example to see how packet drop rate
evolves over time. One common use case is to see the drop rate when there is a network degradation (e.g. one of the 2 links in a bond
goes down).
The console output will show at every reporting interval the number of packets transmitted, received and estimated drop rate for the last reporting interval.
The smaller is the interval the more precise is the drop rate.

Example of output where the reporting interval is set to 1 (second):

.. code-block:: bash

    2020-04-25 12:59:16,618 INFO TX:   1,878,719,266; RX:   1,666,641,890; (Est.) Dropped:            2; Drop rate:   0.0000%
    2020-04-25 12:59:17,625 INFO TX:   1,883,740,078; RX:   1,671,662,706; (Est.) Dropped:           -4; Drop rate:  -0.0001%
    2020-04-25 12:59:18,632 INFO TX:   1,888,764,404; RX:   1,676,686,993; (Est.) Dropped:           39; Drop rate:   0.0008%
    2020-04-25 12:59:19,639 INFO TX:   1,893,785,063; RX:   1,681,276,714; (Est.) Dropped:      430,938; Drop rate:   8.5833%
    2020-04-25 12:59:20,645 INFO TX:   1,898,805,769; RX:   1,683,782,636; (Est.) Dropped:    2,514,784; Drop rate:  50.0883%
    2020-04-25 12:59:21,652 INFO TX:   1,903,829,191; RX:   1,686,289,860; (Est.) Dropped:    2,516,198; Drop rate:  50.0893%
    2020-04-25 12:59:22,658 INFO TX:   1,908,850,478; RX:   1,691,283,008; (Est.) Dropped:       28,139; Drop rate:   0.5604%
    2020-04-25 12:59:23,665 INFO TX:   1,913,870,692; RX:   1,696,301,242; (Est.) Dropped:        1,980; Drop rate:   0.0394%
    2020-04-25 12:59:24,672 INFO TX:   1,918,889,696; RX:   1,698,806,224; (Est.) Dropped:    2,514,022; Drop rate:  50.0901%
    2020-04-25 12:59:25,680 INFO TX:   1,923,915,470; RX:   1,701,314,663; (Est.) Dropped:    2,517,335; Drop rate:  50.0885%
    2020-04-25 12:59:26,687 INFO TX:   1,928,944,879; RX:   1,705,886,869; (Est.) Dropped:      457,203; Drop rate:   9.0906%
    2020-04-25 12:59:27,696 INFO TX:   1,933,969,377; RX:   1,710,911,346; (Est.) Dropped:           21; Drop rate:   0.0004%
    2020-04-25 12:59:28,702 INFO TX:   1,938,998,536; RX:   1,713,843,740; (Est.) Dropped:    2,096,765; Drop rate:  41.6922%
    2020-04-25 12:59:29,710 INFO TX:   1,944,019,920; RX:   1,718,226,356; (Est.) Dropped:      638,768; Drop rate:  12.7210%
    2020-04-25 12:59:30,718 INFO TX:   1,949,050,206; RX:   1,723,256,639; (Est.) Dropped:            3; Drop rate:   0.0001%
    2020-04-25 12:59:31,725 INFO TX:   1,954,075,270; RX:   1,728,281,726; (Est.) Dropped:          -23; Drop rate:  -0.0005%
    2020-04-25 12:59:32,732 INFO TX:   1,959,094,908; RX:   1,733,301,290; (Est.) Dropped:           74; Drop rate:   0.0015%
    2020-04-25 12:59:33,739 INFO TX:   1,964,118,902; RX:   1,738,325,357; (Est.) Dropped:          -73; Drop rate:  -0.0015%
    2020-04-25 12:59:34,746 INFO TX:   1,969,143,790; RX:   1,743,350,230; (Est.) Dropped:           15; Drop rate:   0.0003%
    2020-04-25 12:59:35,753 INFO TX:   1,974,165,773; RX:   1,748,372,291; (Est.) Dropped:          -78; Drop rate:  -0.0016%
    2020-04-25 12:59:36,759 INFO TX:   1,979,188,496; RX:   1,753,394,957; (Est.) Dropped:           57; Drop rate:   0.0011%
    2020-04-25 12:59:37,767 INFO TX:   1,984,208,956; RX:   1,757,183,844; (Est.) Dropped:    1,231,573; Drop rate:  24.5311%
    2020-04-25 12:59:38,773 INFO TX:   1,989,233,595; RX:   1,761,729,705; (Est.) Dropped:      478,778; Drop rate:   9.5286%
    2020-04-25 12:59:39,780 INFO TX:   1,994,253,350; RX:   1,766,749,467; (Est.) Dropped:           -7; Drop rate:  -0.0001%
    2020-04-25 12:59:40,787 INFO TX:   1,999,276,622; RX:   1,771,772,738; (Est.) Dropped:            1; Drop rate:   0.0000%
    2020-04-25 12:59:41,794 INFO TX:   2,004,299,940; RX:   1,776,796,065; (Est.) Dropped:           -9; Drop rate:  -0.0002%
    2020-04-25 12:59:42,800 INFO TX:   2,009,320,453; RX:   1,781,816,583; (Est.) Dropped:           -5; Drop rate:  -0.0001%
    2020-04-25 12:59:43,807 INFO TX:   2,014,340,581; RX:   1,786,503,172; (Est.) Dropped:      333,539; Drop rate:   6.6440%
    2020-04-25 12:59:44,814 INFO TX:   2,019,362,996; RX:   1,789,009,857; (Est.) Dropped:    2,515,730; Drop rate:  50.0900%
    2020-04-25 12:59:45,821 INFO TX:   2,024,386,346; RX:   1,791,517,070; (Est.) Dropped:    2,516,137; Drop rate:  50.0888%


How to read each line:

.. code-block:: bash

    2020-04-25 10:46:41,276 INFO TX:       4,004,436; RX:       4,004,381; (Est.) Dropped:           55; Drop rate:   0.0014%

At this poing in time, NFvbench has sent 4,004,436 and received 4,004,381 since the start of the run.
There is deficit of 55 packets on reception which corresponds to 0.0014% of all packets sent during that reporting window interval (last 1 second)
A negative value means that the RX count is higher than the tx count in that window – this is possible since the RX and TX reads are not atomic.


NDR and PDR
-----------

The NDR and PDR test is used to determine the maximum throughput performance of the system under test
following guidelines defined in RFC-2544:

* NDR (No Drop Rate): maximum packet rate sent without dropping any packet
* PDR (Partial Drop Rate): maximum packet rate sent while allowing a given maximum drop rate

The NDR search can also be relaxed to allow some very small amount of drop rate (lower than the PDR maximum drop rate).
NFVbench will measure the NDR and PDR values by driving the traffic generator through multiple iterations
at different transmission rates using a binary search algorithm.

The configuration file contains section where settings for NDR/PDR can be set.

.. code-block:: bash

    # NDR/PDR configuration
    measurement:
        # Drop rates represent the ratio of dropped packet to the total number of packets sent.
        # Values provided here are percentages. A value of 0.01 means that at most 0.01% of all
        # packets sent are dropped (or 1 packet every 10,000 packets sent)

        # No Drop Rate; Default to 0.001%
        NDR: 0.001
        # Partial Drop Rate; NDR should always be less than PDR
        PDR: 0.1
        # The accuracy of NDR and PDR load percentiles; The actual load percentile that match NDR
        # or PDR should be within `load_epsilon` difference than the one calculated.
        load_epsilon: 0.1

Because NDR/PDR is the default ``--rate`` value, it is possible to run NFVbench simply like this:

.. code-block:: bash

    nfvbench -c nfvbench.cfg

Other possible run options:

.. code-block:: bash

    nfvbench -c nfvbench.cfg --duration 120 --json results.json

Used parameters:

* ``-c nfvbench.cfg`` : path to the config file
* ``--duration 120`` : specifies how long should be traffic running in each iteration
* ``--json results.json`` : collected data are stored in this file after run is finished


Multichain
----------

NFVbench allows to run multiple chains at the same time. For example it is possible to stage the PVP service chain N-times,
where N can be as much as your compute power can scale. With N = 10, NFVbench will spawn 10 VMs as a part of 10 simultaneous PVP chains.

The number of chains is specified by ``--service-chain-count`` or ``-scc`` flag with a default value of 1.
For example to run NFVbench with 3 PVP chains:

.. code-block:: bash

    nfvbench -c nfvbench.cfg --rate 10000pps -scc 3

It is not necessary to specify the service chain type (-sc) because PVP is set as default. The PVP service chains will have 3 VMs in 3 chains with this configuration.
If ``-sc PVVP`` is specified instead, there would be 6 VMs in 3 chains as this service chain has 2 VMs per chain.
Both **single run** or **NDR/PDR** can be run as multichain. Running multichain is a scenario closer to a real life situation than runs with a single chain.


Multiflow
---------

NFVbench always generates L3 packets from the traffic generator but allows the user to specify how many flows to generate.
A flow is identified by a unique src/dest MAC IP and port tuple that is sent by the traffic generator. Flows are
generated by ranging the IP adresses but using a small fixed number of MAC addresses.

The number of flows will be spread roughly even between chains when more than 1 chain is being tested.
For example, for 11 flows and 3 chains, number of flows that will run for each chain will be 3, 4, and 4 flows respectively.

The number of flows is specified by ``--flow-count`` or ``-fc`` flag, the default value is 2 (1 flow in each direction).
To run NFVbench with 3 chains and 100 flows, use the following command:

.. code-block:: bash

    nfvbench -c nfvbench.cfg --rate 10000pps -scc 3 -fc 100

Note that from a vswitch point of view, the
number of flows seen will be higher as it will be at least 4 times the number of flows sent by the traffic generator
(add flow to VM and flow from VM).

IP addresses generated can be controlled with the following NFVbench configuration options:

.. code-block:: bash

    ip_addrs: ['10.0.0.0/8', '20.0.0.0/8']
    ip_addrs_step: 0.0.0.1
    tg_gateway_ip_addrs: ['1.1.0.100', '2.2.0.100']
    tg_gateway_ip_addrs_step: 0.0.0.1
    gateway_ip_addrs: ['1.1.0.2', '2.2.0.2']
    gateway_ip_addrs_step: 0.0.0.1

``ip_addrs`` are the start of the 2 ip address ranges used by the traffic generators as the packets source and destination packets
where each range is associated to virtual devices simulated behind 1 physical interface of the traffic generator.
These can also be written in CIDR notation to represent the subnet.

``tg_gateway_ip_addrs`` are the traffic generator gateway (virtual) ip addresses, all traffic to/from the virtual devices go through them.

``gateway_ip_addrs`` are the 2 gateway ip address ranges of the VMs used in the external chains. They are only used with external chains and must correspond to their public IP address.

The corresponding ``step`` is used for ranging the IP addresses from the `ip_addrs``, ``tg_gateway_ip_addrs`` and ``gateway_ip_addrs`` base addresses.
0.0.0.1 is the default step for all IP ranges. In ``ip_addrs``, 'random' can be configured which tells NFVBench to generate random src/dst IP pairs in the traffic stream.

UDP ports can be controlled with the following NFVbench configuration options:

.. code-block:: bash

    udp_src_port: ['1024', '65000']
    udp_dst_port: 53
    udp_port_step: '1'

``udp_src_port`` and ``udp_dst_port`` are the UDP port value used by the traffic generators.
These can be written for unique port or range ports for all flow.

The corresponding ``udp_port_step`` is used for ranging the UDP port.
1 is the default step for all UDP ranges, 'random' can be configured which tells NFVBench to generate random src/dst UDP pairs in the traffic stream.

NB:
    Use of UDP range will increase possible values of flows (based on ip src/dst and port src/dst tuple).
    NFVBench will calculate the least common multiple for this tuple to adapt flows generation to ``flow_count`` parameter.

Examples of multiflow
^^^^^^^^^^^^^^^^^^^^^

1. Source IP is static and one UDP port used (default configuration)

NFVbench configuration options:

.. code-block:: bash

    ip_addrs: ['110.0.0.0/8', '120.0.0.0/8']
    ip_addrs_step: 0.0.0.1
    tg_gateway_ip_addrs: ['1.1.0.100', '2.2.0.100']
    tg_gateway_ip_addrs_step: 0.0.0.1
    gateway_ip_addrs: ['1.1.0.2', '2.2.0.2']
    gateway_ip_addrs_step: 0.0.0.1

To run NFVbench with 3 chains and 100 flows, use the following command:

.. code-block:: bash

    nfvbench -c nfvbench.cfg --rate 10000pps -scc 3 -fc 100

The least common multiple for this configuration is lcm(16 777 216, 16 777 216, 1, 1) = 16 777 216.
.. note:: LCM method used IP pools sizes and UDP source and destination range sizes

Requested flow count is lower than configuration capacity. So, NFVbench will limit IP range to generate accurate flows:

.. code-block:: bash

    2020-06-17 07:37:47,012 INFO Port 0, chain 0: IP src range [110.0.0.0,110.0.0.0]
    2020-06-17 07:37:47,012 INFO Port 0, chain 0: IP dst range [120.0.0.0,120.0.0.15]
    2020-06-17 07:37:47,012 INFO Port 0, chain 0: UDP src range [53,53]
    2020-06-17 07:37:47,012 INFO Port 0, chain 0: UDP dst range [53,53]
    2020-06-17 07:37:47,015 INFO Port 1, chain 0: IP src range [120.0.0.0,120.0.0.0]
    2020-06-17 07:37:47,015 INFO Port 1, chain 0: IP dst range [110.0.0.0,110.0.0.15]
    2020-06-17 07:37:47,015 INFO Port 1, chain 0: UDP src range [53,53]
    2020-06-17 07:37:47,015 INFO Port 1, chain 0: UDP dst range [53,53]

    2020-06-17 07:38:47,012 INFO Port 0, chain 1: IP src range [110.0.0.1,110.0.0.1]
    2020-06-17 07:38:47,012 INFO Port 0, chain 1: IP dst range [120.0.0.16,120.0.0.32]
    2020-06-17 07:38:47,012 INFO Port 0, chain 1: UDP src range [53,53]
    2020-06-17 07:38:47,012 INFO Port 0, chain 1: UDP dst range [53,53]
    2020-06-17 07:38:47,015 INFO Port 1, chain 1: IP src range [120.0.0.1,120.0.0.1]
    2020-06-17 07:38:47,015 INFO Port 1, chain 1: IP dst range [110.0.0.16,110.0.0.32]
    2020-06-17 07:38:47,015 INFO Port 1, chain 1: UDP src range [53,53]
    2020-06-17 07:38:47,015 INFO Port 1, chain 1: UDP dst range [53,53]

    2020-06-17 07:39:47,012 INFO Port 0, chain 2: IP src range [110.0.0.2,110.0.0.2]
    2020-06-17 07:39:47,012 INFO Port 0, chain 2: IP dst range [120.0.0.33,120.0.0.49]
    2020-06-17 07:39:47,012 INFO Port 0, chain 2: UDP src range [53,53]
    2020-06-17 07:39:47,012 INFO Port 0, chain 2: UDP dst range [53,53]
    2020-06-17 07:39:47,015 INFO Port 1, chain 2: IP src range [120.0.0.2,120.0.0.2]
    2020-06-17 07:39:47,015 INFO Port 1, chain 2: IP dst range [110.0.0.33,110.0.0.49]
    2020-06-17 07:39:47,015 INFO Port 1, chain 2: UDP src range [53,53]
    2020-06-17 07:39:47,015 INFO Port 1, chain 2: UDP dst range [53,53]


2. Source IP is static, IP step is random and one UDP port used

NFVbench configuration options:

.. code-block:: bash

    ip_addrs: ['110.0.0.0/8', '120.0.0.0/8']
    ip_addrs_step: 'random'
    tg_gateway_ip_addrs: ['1.1.0.100', '2.2.0.100']
    tg_gateway_ip_addrs_step: 0.0.0.1
    gateway_ip_addrs: ['1.1.0.2', '2.2.0.2']
    gateway_ip_addrs_step: 0.0.0.1

To run NFVbench with 3 chains and 100 flows, use the following command:

.. code-block:: bash

    nfvbench -c nfvbench.cfg --rate 10000pps -scc 3 -fc 100

The least common multiple for this configuration is lcm(16 777 216, 16 777 216, 1, 1) = 16 777 216.
.. note:: LCM method used IP pools sizes and UDP source and destination range sizes

Requested flow count is lower than configuration capacity. So, NFVbench will limit IP range to generate accurate flows:

.. code-block:: bash

    2020-06-17 07:37:47,012 INFO Port 0, chain 0: IP src range [110.0.0.0,110.0.0.0]
    2020-06-17 07:37:47,012 INFO Port 0, chain 0: IP dst range [120.0.0.0,120.0.0.15]
    2020-06-17 07:37:47,012 INFO Port 0, chain 0: UDP src range [53,53]
    2020-06-17 07:37:47,012 INFO Port 0, chain 0: UDP dst range [53,53]
    2020-06-17 07:37:47,015 INFO Port 1, chain 0: IP src range [120.0.0.0,120.0.0.0]
    2020-06-17 07:37:47,015 INFO Port 1, chain 0: IP dst range [110.0.0.0,110.0.0.15]
    2020-06-17 07:37:47,015 INFO Port 1, chain 0: UDP src range [53,53]
    2020-06-17 07:37:47,015 INFO Port 1, chain 0: UDP dst range [53,53]

    2020-06-17 07:38:47,012 INFO Port 0, chain 1: IP src range [110.0.0.1,110.0.0.1]
    2020-06-17 07:38:47,012 INFO Port 0, chain 1: IP dst range [120.0.0.16,120.0.0.32]
    2020-06-17 07:38:47,012 INFO Port 0, chain 1: UDP src range [53,53]
    2020-06-17 07:38:47,012 INFO Port 0, chain 1: UDP dst range [53,53]
    2020-06-17 07:38:47,015 INFO Port 1, chain 1: IP src range [120.0.0.1,120.0.0.1]
    2020-06-17 07:38:47,015 INFO Port 1, chain 1: IP dst range [110.0.0.16,110.0.0.32]
    2020-06-17 07:38:47,015 INFO Port 1, chain 1: UDP src range [53,53]
    2020-06-17 07:38:47,015 INFO Port 1, chain 1: UDP dst range [53,53]

    2020-06-17 07:39:47,012 INFO Port 0, chain 2: IP src range [110.0.0.2,110.0.0.2]
    2020-06-17 07:39:47,012 INFO Port 0, chain 2: IP dst range [120.0.0.33,120.0.0.49]
    2020-06-17 07:39:47,012 INFO Port 0, chain 2: UDP src range [53,53]
    2020-06-17 07:39:47,012 INFO Port 0, chain 2: UDP dst range [53,53]
    2020-06-17 07:39:47,015 INFO Port 1, chain 2: IP src range [120.0.0.2,120.0.0.2]
    2020-06-17 07:39:47,015 INFO Port 1, chain 2: IP dst range [110.0.0.33,110.0.0.49]
    2020-06-17 07:39:47,015 INFO Port 1, chain 2: UDP src range [53,53]
    2020-06-17 07:39:47,015 INFO Port 1, chain 2: UDP dst range [53,53]
    2020-06-17 07:39:47,015 WARNING Using random step, the number of flows can be less than the requested number of flows due to repeatable multivariate random generation which can reproduce the same pattern of values

By using a random step the number of generated flows may be less than the number of requested flows. This is due to the probability of drawing the same value several times (Bernouillian drawing) from the IP range used and thus generating the same flow sequence.
By using a high range of UDP ports couple with ``udp_port_step='random'`` the probability to reach the requested flow counts is greater.
As latency stream is a separate stream than data one and have his own random draw, NFVbench will use only one packet signature (same IP and ports used for all latency packets) to avoid flow count overflow.
So in some cases, generated flow count can be equal to the requested flow count + 1 (latency stream).

**For deterministic flow count we recommend to use a step different from random.**


3. Source IP is static, IP step is 5 and one UDP port used

NFVbench configuration options:

.. code-block:: bash

    ip_addrs: ['110.0.0.0/8', '120.0.0.0/8']
    ip_addrs_step: '0.0.0.5'
    tg_gateway_ip_addrs: ['1.1.0.100', '2.2.0.100']
    tg_gateway_ip_addrs_step: 0.0.0.1
    gateway_ip_addrs: ['1.1.0.2', '2.2.0.2']
    gateway_ip_addrs_step: 0.0.0.1

To run NFVbench with 3 chains and 100 flows, use the following command:

.. code-block:: bash

    nfvbench -c nfvbench.cfg --rate 10000pps -scc 3 -fc 100

The least common multiple for this configuration is lcm(16 777 216, 16 777 216, 1, 1) = 16 777 216.
.. note:: LCM method used IP pools sizes and UDP source and destination range sizes

Requested flow count is lower than configuration capacity. So, NFVbench will limit IP range to generate accurate flows:

.. code-block:: bash

    2020-06-17 07:37:47,012 INFO Port 0, chain 0: IP src range [110.0.0.0,110.0.0.0]
    2020-06-17 07:37:47,012 INFO Port 0, chain 0: IP dst range [120.0.0.0,120.0.0.75]
    2020-06-17 07:37:47,012 INFO Port 0, chain 0: UDP src range [53,53]
    2020-06-17 07:37:47,012 INFO Port 0, chain 0: UDP dst range [53,53]
    2020-06-17 07:37:47,015 INFO Port 1, chain 0: IP src range [120.0.0.0,120.0.0.0]
    2020-06-17 07:37:47,015 INFO Port 1, chain 0: IP dst range [110.0.0.0,110.0.0.75]
    2020-06-17 07:37:47,015 INFO Port 1, chain 0: UDP src range [53,53]
    2020-06-17 07:37:47,015 INFO Port 1, chain 0: UDP dst range [53,53]

    2020-06-17 07:38:47,012 INFO Port 0, chain 1: IP src range [110.0.0.5,110.0.0.5]
    2020-06-17 07:38:47,012 INFO Port 0, chain 1: IP dst range [120.0.0.80,120.0.0.160]
    2020-06-17 07:38:47,012 INFO Port 0, chain 1: UDP src range [53,53]
    2020-06-17 07:38:47,012 INFO Port 0, chain 1: UDP dst range [53,53]
    2020-06-17 07:38:47,015 INFO Port 1, chain 1: IP src range [120.0.0.5,120.0.0.5]
    2020-06-17 07:38:47,015 INFO Port 1, chain 1: IP dst range [110.0.0.80,110.0.0.160]
    2020-06-17 07:38:47,015 INFO Port 1, chain 1: UDP src range [53,53]
    2020-06-17 07:38:47,015 INFO Port 1, chain 1: UDP dst range [53,53]

    2020-06-17 07:39:47,012 INFO Port 0, chain 2: IP src range [110.0.0.10,110.0.0.10]
    2020-06-17 07:39:47,012 INFO Port 0, chain 2: IP dst range [120.0.0.165,120.0.0.245]
    2020-06-17 07:39:47,012 INFO Port 0, chain 2: UDP src range [53,53]
    2020-06-17 07:39:47,012 INFO Port 0, chain 2: UDP dst range [53,53]
    2020-06-17 07:39:47,015 INFO Port 1, chain 2: IP src range [120.0.0.10,120.0.0.10]
    2020-06-17 07:39:47,015 INFO Port 1, chain 2: IP dst range [110.0.0.165,110.0.0.245]
    2020-06-17 07:39:47,015 INFO Port 1, chain 2: UDP src range [53,53]
    2020-06-17 07:39:47,015 INFO Port 1, chain 2: UDP dst range [53,53]

4. Source IP is static, IP and UDP ranges sizes greater than requested flow count, UDP step is random

NFVbench configuration options:

.. code-block:: bash

    ip_addrs: ['110.0.0.0/29', '120.0.0.0/30']
    tg_gateway_ip_addrs: ['1.1.0.100', '2.2.0.100']
    tg_gateway_ip_addrs_step: 0.0.0.1
    gateway_ip_addrs: ['1.1.0.2', '2.2.0.2']
    gateway_ip_addrs_step: 0.0.0.1
    udp_src_port: ['10', '14']
    udp_dst_port: ['20', '25']
    udp_port_step: 'random'

To run NFVbench with 3 chains and 100 flows, use the following command:

.. code-block:: bash

    nfvbench -c nfvbench.cfg --rate 10000pps -scc 3 -fc 100

The least common multiple for this configuration is lcm(8, 4, 5, 6) = 120.
.. note:: LCM method used IP pools sizes and UDP source and destination range sizes

Requested flow count is higher than IP range (8 and 4 IP addresses available) and UDP (5 and 6 ports available) configuration capacity.
As the combination of ranges does not permit to obtain an accurate flow count, NFVbench will override the `udp_port_step` property to '1' (was 'random') to allow flows creation.
A warning log will appear to inform NFVbench user that step properties will be overriden
So, NFVbench will determine each pool size to generate accurate flows:

.. code-block:: bash

    2020-06-17 07:37:47,010 WARNING Current values of ip_addrs_step and/or udp_port_step properties do not allow to control an accurate flow count. Values will be overridden as follows:
    2020-06-17 07:37:47,011 INFO udp_port_step='1' (previous value: udp_port_step='random')
    2020-06-17 07:37:47,012 INFO Port 0, chain 0: IP src range [110.0.0.0,110.0.0.0]
    2020-06-17 07:37:47,012 INFO Port 0, chain 0: IP dst range [120.0.0.0,120.0.0.0]
    2020-06-17 07:37:47,012 INFO Port 0, chain 0: UDP src range [10,14]
    2020-06-17 07:37:47,012 INFO Port 0, chain 0: UDP dst range [20,25]
    2020-06-17 07:37:47,013 WARNING Current values of ip_addrs_step and/or udp_port_step properties do not allow to control an accurate flow count. Values will be overridden as follows:
    2020-06-17 07:37:47,013 INFO udp_port_step='1' (previous value: udp_port_step='random'
    2020-06-17 07:37:47,015 INFO Port 1, chain 0: IP src range [120.0.0.0,120.0.0.0]
    2020-06-17 07:37:47,015 INFO Port 1, chain 0: IP dst range [110.0.0.0,110.0.0.0]
    2020-06-17 07:37:47,015 INFO Port 1, chain 0: UDP src range [10,14]
    2020-06-17 07:37:47,015 INFO Port 1, chain 0: UDP dst range [20,25]

    2020-06-17 07:38:47,010 WARNING Current values of ip_addrs_step and/or udp_port_step properties do not allow to control an accurate flow count. Values will be overridden as follows:
    2020-06-17 07:38:47,011 INFO udp_port_step='1' (previous value: udp_port_step='random'
    2020-06-17 07:38:47,012 INFO Port 0, chain 1: IP src range [110.0.0.1,110.0.0.1]
    2020-06-17 07:38:47,012 INFO Port 0, chain 1: IP dst range [120.0.0.1,120.0.0.1]
    2020-06-17 07:38:47,012 INFO Port 0, chain 1: UDP src range [10,14]
    2020-06-17 07:38:47,012 INFO Port 0, chain 1: UDP dst range [20,25]
    2020-06-17 07:38:47,013 WARNING Current values of ip_addrs_step and/or udp_port_step properties do not allow to control an accurate flow count. Values will be overridden as follows:
    2020-06-17 07:38:47,013 INFO udp_port_step='1' (previous value: udp_port_step='random'
    2020-06-17 07:38:47,015 INFO Port 1, chain 1: IP src range [120.0.0.1,120.0.0.1]
    2020-06-17 07:38:47,015 INFO Port 1, chain 1: IP dst range [110.0.0.1,110.0.0.1]
    2020-06-17 07:38:47,015 INFO Port 1, chain 1: UDP src range [10,14]
    2020-06-17 07:38:47,015 INFO Port 1, chain 1: UDP dst range [20,25]

    2020-06-17 07:39:47,010 WARNING Current values of ip_addrs_step and/or udp_port_step properties do not allow to control an accurate flow count. Values will be overridden as follows:
    2020-06-17 07:39:47,011 INFO udp_port_step='1' (previous value: udp_port_step='random'
    2020-06-17 07:39:47,012 INFO Port 0, chain 2: IP src range [110.0.0.2,110.0.0.2]
    2020-06-17 07:39:47,012 INFO Port 0, chain 2: IP dst range [120.0.0.2,120.0.0.2]
    2020-06-17 07:39:47,012 INFO Port 0, chain 2: UDP src range [10,14]
    2020-06-17 07:39:47,012 INFO Port 0, chain 2: UDP dst range [20,25]
    2020-06-17 07:39:47,013 WARNING Current values of ip_addrs_step and/or udp_port_step properties do not allow to control an accurate flow count. Values will be overridden as follows:
    2020-06-17 07:39:47,013 INFO udp_port_step='1' (previous value: udp_port_step='random'
    2020-06-17 07:39:47,015 INFO Port 1, chain 2: IP src range [120.0.0.2,120.0.0.2]
    2020-06-17 07:39:47,015 INFO Port 1, chain 2: IP dst range [110.0.0.2,110.0.0.2]
    2020-06-17 07:39:47,015 INFO Port 1, chain 2: UDP src range [10,14]
    2020-06-17 07:39:47,015 INFO Port 1, chain 2: UDP dst range [20,25]


Traffic Configuration via CLI
-----------------------------

While traffic configuration can be modified using the configuration file, it can be inconvenient to have to change the configuration file everytime
you need to change a traffic configuration option. Traffic configuration options can be overridden with a few CLI options.

Here is an example of configuring traffic via CLI:

.. code-block:: bash

    nfvbench --rate 10kpps --service-chain-count 2 -fs 64 -fs IMIX -fs 1518 --unidir

This command will run NFVbench with a unidirectional flow for three packet sizes 64B, IMIX, and 1518B.

Used parameters:

* ``--rate 10kpps`` : defines rate of packets sent by traffic generator (total TX rate)
* ``-scc 2`` or ``--service-chain-count 2`` : specifies number of parallel chains of given flow to run (default to 1)
* ``-fs 64`` or ``--frame-size 64``: add the specified frame size to the list of frame sizes to run
* ``--unidir`` : run traffic with unidirectional flow (default to bidirectional flow)


MAC Addresses
-------------

NFVbench will dicover the MAC addresses to use for generated frames using:
- either OpenStack discovery (find the MAC of an existing VM) in the case of PVP and PVVP service chains
- or using dynamic ARP discovery (find MAC from IP) in the case of external chains.
- In case of L3 chain with SDN-GW or router between traffic generator and loop VM ARP is needed to discover SDN-GW mac addresses, use ``--loop-vm-arp`` flag or ``loop_vm_arp: true`` in config file.

Status and Cleanup of NFVbench Resources
----------------------------------------

The --status option will display the status of NFVbench and list any NFVbench resources. You need to pass the OpenStack RC
file in order to connect to OpenStack.

.. code-block:: none

    # nfvbench --status -r /tmp/nfvbench/openrc
    2018-04-09 17:05:48,682 INFO Version: 1.3.2.dev1
    2018-04-09 17:05:48,683 INFO Status: idle
    2018-04-09 17:05:48,757 INFO Discovering instances nfvbench-loop-vm...
    2018-04-09 17:05:49,252 INFO Discovering flavor nfvbench.medium...
    2018-04-09 17:05:49,281 INFO Discovering networks...
    2018-04-09 17:05:49,365 INFO No matching NFVbench resources found
    #

The Status can be either "idle" or "busy (run pending)".

The --cleanup option will first discover resources created by NFVbench and prompt if you want to proceed with cleaning them up.
Example of run:

.. code-block:: none

    # nfvbench --cleanup -r /tmp/nfvbench/openrc
    2018-04-09 16:58:00,204 INFO Version: 1.3.2.dev1
    2018-04-09 16:58:00,205 INFO Status: idle
    2018-04-09 16:58:00,279 INFO Discovering instances nfvbench-loop-vm...
    2018-04-09 16:58:00,829 INFO Discovering flavor nfvbench.medium...
    2018-04-09 16:58:00,876 INFO Discovering networks...
    2018-04-09 16:58:00,960 INFO Discovering ports...
    2018-04-09 16:58:01,012 INFO Discovered 6 NFVbench resources:
    +----------+-------------------+--------------------------------------+
    | Type     | Name              | UUID                                 |
    |----------+-------------------+--------------------------------------|
    | Instance | nfvbench-loop-vm0 | b039b858-777e-467e-99fb-362f856f4a94 |
    | Flavor   | nfvbench.medium   | a027003c-ad86-4f24-b676-2b05bb06adc0 |
    | Network  | nfvbench-net0     | bca8d183-538e-4965-880e-fd92d48bfe0d |
    | Network  | nfvbench-net1     | c582a201-8279-4309-8084-7edd6511092c |
    | Port     |                   | 67740862-80ac-4371-b04e-58a0b0f05085 |
    | Port     |                   | b5db95b9-e419-4725-951a-9a8f7841e66a |
    +----------+-------------------+--------------------------------------+
    2018-04-09 16:58:01,013 INFO NFVbench will delete all resources shown...
    Are you sure? (y/n) y
    2018-04-09 16:58:01,865 INFO Deleting instance nfvbench-loop-vm0...
    2018-04-09 16:58:02,058 INFO     Waiting for 1 instances to be fully deleted...
    2018-04-09 16:58:02,182 INFO     1 yet to be deleted by Nova, retries left=6...
    2018-04-09 16:58:04,506 INFO     1 yet to be deleted by Nova, retries left=5...
    2018-04-09 16:58:06,636 INFO     1 yet to be deleted by Nova, retries left=4...
    2018-04-09 16:58:08,701 INFO Deleting flavor nfvbench.medium...
    2018-04-09 16:58:08,729 INFO Deleting port 67740862-80ac-4371-b04e-58a0b0f05085...
    2018-04-09 16:58:09,102 INFO Deleting port b5db95b9-e419-4725-951a-9a8f7841e66a...
    2018-04-09 16:58:09,620 INFO Deleting network nfvbench-net0...
    2018-04-09 16:58:10,357 INFO Deleting network nfvbench-net1...
    #

The --force-cleanup option will do the same but without prompting for confirmation.

Service mode for TRex
---------------------

The ``--service-mode`` option allows you to capture traffic on a TRex window during the NFVBench test. Thus, you will be
able to capture packets generated by TRex to observe many information on it.

Example of use :

.. code-block:: bash

    nfvbench ``--service-mode``

.. note:: It is preferable to define the minimum rate (2002 pps) to have a better capture

In another bash window, you should connect to the TRex console doing:

.. code-block:: bash

    cd /opt/trex/vX.XX/ # use completion here to find your corresponding TRex version
    ./trex-console --python3 -r
    # capture on port number 0
    capture monitor start --rx 0 -v

    # to stop capture
    capture monitor stop

Start this capture once you have started the NFVBench test, and you will observe packets on the TRex console:

.. code-block:: bash

    #26342 Port: 0 ◀── RX

    trex(read-only)>

        Type: UDP, Size: 66 B, TS: 26.30 [sec]

    trex(read-only)>
        ###[ Ethernet ]###
            dst       = a0:36:9f:7a:58:8e
            src       = fa:16:3e:57:8f:df
            type      = 0x8100
        ###[ 802.1Q ]###
            prio      = 0
            id        = 0
            vlan      = 1093
            type      = 0x800
        ###[ IP ]###
            version   = 4
            ihl       = 5
            tos       = 0x1
            len       = 46
            id        = 65535
            flags     =
            frag      = 0
            ttl       = 63
            proto     = udp
            chksum    = 0x8425
            src       = 120.0.0.0
            dst       = 110.0.17.153
            \options   \
        ###[ UDP ]###
            sport     = 53
            dport     = 53
            len       = 26
            chksum    = 0xfd83
        ###[ Raw ]###
            load      = "xx\xab'\x01\x00?s\x00\x00\xbci\xf0_{U~\x00"
        ###[ Padding ]###
            load      = '6\x85'

Check on the NFVBench window that the following log appears just before the testing phase:

.. code-block:: bash

    2019-10-21 09:38:51,532 INFO Starting to generate traffic...
    2019-10-21 09:38:51,532 INFO Running traffic generator
    2019-10-21 09:38:51,541 INFO ``Service mode is enabled``
    2019-10-21 09:38:52,552 INFO TX: 2004; RX: 2003; Est. Dropped: 1; Est. Drop rate: 0.0499%
    2019-10-21 09:38:53,559 INFO TX: 4013; RX: 4011; Est. Dropped: 2; Est. Drop rate: 0.0498%

Recording packet using service mode for TRex
--------------------------------------------

Check on the NFVBench window that the following log appears just before the testing phase:

.. code-block:: bash

    2019-10-21 09:38:51,532 INFO Starting to generate traffic...
    2019-10-21 09:38:51,532 INFO Running traffic generator
    2019-10-21 09:38:51,541 INFO ``Service mode is enabled``
    2019-10-21 09:38:52,552 INFO TX: 2004; RX: 2003; Est. Dropped: 1; Est. Drop rate: 0.0499%

In another bash window, you should connect to the TRex console doing :

.. code-block:: bash

    cd /opt/trex/vX.XX/ #use completion here to find your corresponding TRex version
    ./trex-console -r
    capture record start --rx [port number] --limit 10000
.. note::Start this capture once traffic generation is started (after ``Service mode is enabled`` log)

Check on the TRex window that the following log appears just after capture is started:

.. code-block:: bash

    Starting packet capturing up to 10000 packets               [SUCCESS]
    *** Capturing ID is set to '8' ***
    *** Please call 'capture record stop --id 8 -o <out.pcap>' when done ***

Then **before end of traffic generation**, stop capture and save it as a PCAP file:

.. code-block:: bash

    capture record stop --id 8 -o /tmp/nfvb/record.pcap
.. note:: Provide a shared path with between NFVbench container and your host to retrieve pcap file

Check on the TRex window that the following log appears just after capture is started:

.. code-block:: bash

    Stopping packet capture 8                                    [SUCCESS]
    Writing up to 10000 packets to '/tmp/nfvb/record.pcap'       [SUCCESS]
    Removing PCAP capture 8 from server                          [SUCCESS]

User info data
--------------

The ``--user-info`` option allows you to pass custom information as a JSON string.
This information will be available through JSON output and also exported to ``fluentd`` and can be used in results post-processing.

Example of use :

.. code-block:: bash

    nfvbench ``--user-info='{"status":"explore","description":{"target":"lab","ok":true,"version":2020}'``

.. note:: only JSON string is allowed

``--user-info`` can be used for determining theoretical max rate. In some cases, an overhead encapsulation exists between NFVbench and SUT so NFVbench will not reach line rate inside SUT due to this extra encapsulation.
To calculate this theoretical line rate inside SUT, NFVbench will use a reserved key: ``extra_encapsulation_bytes`` in ``--user-info`` property.

.. code-block:: bash

    nfvbench ``--user-info='{"extra_encapsulation_bytes": 28}'``


As a result, NFVbench will return two values ``theoretical_tx_rate_bps`` and ``theoretical_tx_rate_pps``:

.. code-block:: bash

                                "ndr": {
                                    "duration_sec": 2.0,
                                    "initial_rate_type": "rate_percent",
                                    "l2frame_size": "64",
                                    "load_percent_per_direction": 100.0,
                                    "rate_bps": 20000000000.0,
                                    "rate_percent": 200.0,
                                    "rate_pps": 29761904,
                                    "stats": {
                                        ...
                                        "offered_tx_rate_bps": 15000000000.0,
                                        ...
                                        "theoretical_tx_rate_bps": 15000000000.0,
                                        "theoretical_tx_rate_pps": 22321428.57142857,
                                        "total_tx_rate": 22321428
                                    },

In the above example, line rate is 20Gbps but NFVbench is outside SUT and a SDN gateway add an extra encapsulation of 28 bytes.
Overall, theoretical line rate inside SUT is only 15 Gbps for 64 bytes packet size and it will be this max capacity treated by the target compute node.