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Change-Id: I0d3387a520e3decf51bb0f7db53996f148a611d0
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-.. This work is licensed under a Creative Commons Attribution 4.0 International
-.. License.
-.. http://creativecommons.org/licenses/by/4.0
-.. (c) OPNFV, 2016-2017 Intel Corporation.
-
-=====================================
-Network Services Benchmarking (NSB)
-=====================================
-
-Abstract
-========
-
-.. _Yardstick: https://wiki.opnfv.org/yardstick
-
-This chapter provides an overview of the NSB, a contribution to OPNFV
-Yardstick_ from Intel.
-
-Overview
-========
-
-GOAL: Extend Yardstick to perform real world VNFs and NFVi Characterization and
-benchmarking with repeatable and deterministic methods.
-
-The Network Service Benchmarking (NSB) extends the yardstick framework to do
-VNF characterization and benchmarking in three different execution
-environments - bare metal i.e. native Linux environment, standalone virtual
-environment and managed virtualized environment (e.g. Open stack etc.).
-It also brings in the capability to interact with external traffic generators
-both hardware & software based for triggering and validating the traffic
-according to user defined profiles.
-
-NSB extension includes:
-
-    - Generic data models of Network Services, based on ETSI spec (ETSI GS NFV-TST 001)
-      .. _ETSI GS NFV-TST 001: http://www.etsi.org/deliver/etsi_gs/NFV-TST/001_099/001/01.01.01_60/gs_nfv-tst001v010101p.pdf
-
-    - New Standalone context for VNF testing like SRIOV, OVS, OVS-DPDK etc
-
-    - Generic VNF configuration models and metrics implemented with Python
-      classes
-
-    - Traffic generator features and traffic profiles
-
-        - L1-L3 state-less traffic profiles
-
-        - L4-L7 state-full  traffic  profiles
-
-        - Tunneling protocol / network overlay support
-
-    - Test case samples
-
-        - Ping
-
-        - Trex
-
-        - vPE,vCGNAT, vFirewall etc - ipv4 throughput, latency etc
-
-    - Traffic generators like Trex, ab/nginx, ixia, iperf etc
-
-    - KPIs for a given use case:
-
-        - System agent support for collecting NFVi KPI. This includes:
-
-            - CPU statistic
-
-            - Memory BW
-
-            - OVS-DPDK Stats
-
-        - Network KPIs,  e.g., inpackets, outpackets, thoughput, latency etc
-
-        - VNF KPIs, e.g., packet_in, packet_drop, packet_fwd etc
-
-Architecture
-============
-The Network Service (NS) defines a set of Virtual Network Functions (VNF)
-connected together using NFV infrastructure.
-
-The Yardstick NSB extension can support multiple VNFs created by different
-vendors including traffic generators. Every VNF being tested has its
-own data model. The Network service defines a VNF modelling on base of performed
-network functionality. The part of the data model is a set of the configuration
-parameters, number of connection points used and flavor including core and
-memory amount.
-
-The ETSI defines a Network Service as a set of configurable VNFs working in
-some NFV Infrastructure connecting each other using Virtual Links available
-through Connection Points. The ETSI MANO specification defines a set of
-management entities called Network Service Descriptors (NSD) and
-VNF Descriptors (VNFD) that define real Network Service. The picture below
-makes an example how the real Network Operator use-case can map into ETSI
-Network service definition
-
-Network Service framework performs the necessary test steps. It may involve
-
-    - Interacting with traffic generator and providing the inputs on traffic
-      type / packet structure to generate the required traffic as per the
-      test case. Traffic profiles will be used for this.
-
-    - Executing the commands required for the test procedure and analyses the
-      command output for confirming whether the command got executed correctly
-      or not. E.g. As per the test case, run the traffic for the given
-      time period / wait for the necessary time delay
-
-    - Verify the test result.
-
-    - Validate the traffic flow from SUT
-
-    - Fetch the table / data from SUT and verify the value as per the test case
-
-    - Upload the logs from SUT onto the Test Harness server
-
-    - Read the KPI's provided by particular VNF
-
-Components of Network Service
-------------------------------
-
-* *Models for Network Service benchmarking*: The Network Service benchmarking
-  requires the proper modelling approach. The NSB provides models using Python
-  files and defining of NSDs and VNFDs.
-
-The benchmark control application being a part of OPNFV yardstick can call
-that python models to instantiate and configure the VNFs. Depending on
-infrastructure type (bare-metal or fully virtualized) that calls could be
-made directly or using MANO system.
-
-* *Traffic generators in NSB*: Any benchmark application requires a set of
-  traffic generator and traffic profiles defining the method in which traffic
-  is generated.
-
-The Network Service benchmarking model extends the Network Service
-definition with a set of Traffic Generators (TG) that are treated
-same way as other VNFs being a part of benchmarked network service.
-Same as other VNFs the traffic generator are instantiated and terminated.
-
-Every traffic generator has own configuration defined as a traffic profile and
-a set of KPIs supported. The python models for TG is extended by specific calls
-to listen and generate traffic.
-
-* *The stateless TREX traffic generator*: The main traffic generator used as
-  Network Service stimulus is open source TREX tool.
-
-The TREX tool can generate any kind of stateless traffic.
-
-.. code-block:: console
-
-        +--------+      +-------+      +--------+
-        |        |      |       |      |        |
-        |  Trex  | ---> |  VNF  | ---> |  Trex  |
-        |        |      |       |      |        |
-        +--------+      +-------+      +--------+
-
-Supported testcases scenarios:
-
-    - Correlated UDP traffic using TREX traffic generator and replay VNF.
-
-        - using different IMIX configuration like pure voice, pure video traffic etc
-
-        - using different number IP flows like 1 flow, 1K, 16K, 64K, 256K, 1M flows
-
-        - Using different number of rules configured like 1 rule, 1K, 10K rules
-
-For UDP correlated traffic following Key Performance Indicators are collected
-for every combination of test case parameters:
-
-    - RFC2544 throughput for various loss rate defined (1% is a default)
-
-Graphical Overview
-==================
-
-NSB Testing with yardstick framework  facilitate performance testing of various
-VNFs provided.
-
-.. code-block:: console
-
-  +-----------+
-  |           |                                                     +-----------+
-  |   vPE     |                                                   ->|TGen Port 0|
-  | TestCase  |                                                   | +-----------+
-  |           |                                                   |
-  +-----------+     +------------------+            +-------+     |
-                    |                  | -- API --> |  VNF  | <--->
-  +-----------+     |     Yardstick    |            +-------+     |
-  | Test Case | --> |    NSB Testing   |                          |
-  +-----------+     |                  |                          |
-        |           |                  |                          |
-        |           +------------------+                          |
-  +-----------+                                                   | +-----------+
-  |   Traffic |                                                   ->|TGen Port 1|
-  |  patterns |                                                     +-----------+
-  +-----------+
-
-              Figure 1: Network Service - 2 server configuration
-
-
-Install
-=======
-
-run the nsb_install.sh with root privileges
-
-Run
-===
-
-::
-
-    source ~/.bash_profile
-    cd <yardstick_repo>/yardstick/cmd
-    sudo -E ./NSBperf.py --vnf vpe --test tc_baremetal_rfc2544_ipv4_1flow_64B.yaml
-
-Development Environment
-=======================
-
-Ubuntu 14.04, Ubuntu 16.04