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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, Intel Corporation and others.
============
Architecture
============
Abstract
========
This chapter describes the samplevnf software architecture.
we will introduce it VNFs. More technical details will be introduced in this chapter.
Overview
========
Architecture overview
---------------------
This project provides a placeholder for various sample VNF (Virtual Network Function)
development which includes example reference architecture and optimization methods
related to VNF/Network service for high performance VNFs.
The sample VNFs are Open Source approximations* of Telco grade VNF’s using
optimized VNF + NFVi Infrastructure libraries, with Performance Characterization
of Sample† Traffic Flows.
::
* Not a commercial product. Encourage the community to contribute and close the feature gaps.
† No Vendor/Proprietary Workloads
It helps to facilitate deterministic & repeatable bench-marking on Industry
standard high volume Servers. It augments well with a Test infrastructure to
help facilitate consistent/repeatable methodologies for characterizing &
validating the sample VNFs through OPEN SOURCE VNF approximations and test tools.
The VNFs belongs to this project are never meant for field deployment.
All the VNF source code part of this project requires Apache License Version 2.0.
Supported deployment:
----------------------
* Bare-Metal - All VNFs can run on a Bare-Metal DUT
* Standalone Virtualization(SV): All VNFs can run on SV like VPP as switch, ovs,
ovs-dpdk, srioc
* Openstack: Latest Openstack supported
VNF supported
-------------
- Carrier Grade Network Address Translation (CG-NAT) VNF
::
The Carrier Grade Network Address and port Translation (vCG-NAPT) is a
VNF approximation extending the life of the service providers IPv4 network
infrastructure and mitigate IPv4 address exhaustion by using address and
port translation in large scale. It processes the traffic in both the directions.
It also supports the connectivity between the IPv6 access network to
IPv4 data network using the IPv6 to IPv4 address translation and vice versa.
- Firewall (vFW) VNF
::
The Virtual Firewall (vFW) is a VNF approximation serving as a state full
L3/L4 packet filter with connection tracking enabled for TCP, UDP and ICMP.
The VNF could be a part of Network Services (industry use-cases) deployed
to secure the enterprise network from un-trusted network.
- Access Control List (vACL) VNF
::
The vACL vNF is implemented as a DPDK application using VNF Infrastructure
Library (VIL). The VIL implements common VNF internal, optimized for
Intel Architecture functions like load balancing between cores, IPv4/IPv6
stack features, and interface to NFV infrastructure like OVS or SRIOV.
- UDP_Replay
::
The UDP Replay is implemented as a DPDK application using VNF Infrastructure
Library (VIL). Performs as a refelector of all the traffic on given port.
- Prox - Packet pROcessing eXecution engine.
::
Packet pROcessing eXecution Engine (PROX) which is a DPDK application.
PROX can do operations on packets in a highly configurable manner.
The PROX application is also displaying performance statistics that can
be used for performance investigations.
Intel® DPPD - PROX is an application built on top of DPDK which allows
creating software architectures, such as the one depicted below, through
small and readable configuration files.
This VNF can act as L2FWD, L3FWD, BNG etc.
Test Framework
--------------
.. _Yardstick_NSB: http://artifacts.opnfv.org/yardstick/docs/testing_user_userguide/index.html#document-13-nsb-overview
SampleVNF Test Infrastructure (NSB (Yardstick_NSB_)) in yardstick helps to facilitate
consistent/repeatable methodologies for characterizing & validating the
sample VNFs (:term:`VNF`) through OPEN SOURCE VNF approximations.
Network Service Benchmarking in yardstick framework follows ETSI GS NFV-TST001_
to verify/characterize both :term:`NFVI` & :term:`VNF`
For more inforamtion refer, Yardstick_NSB_
SampleVNF Directory structure
=============================
**samplevnf/** - SampleVNF main directory.
*common/* - Common re-useable code like arp, nd, packet fwd etc
*docs/* - All documentation is stored here, such as configuration guides,
user guides and SampleVNF descriptions.
*tools/* - Currently contains tools to build image for VMs which are deployed
by Heat. Currently contains helper scripts like install, setup env
*VNFs/* - all VNF source code directory.
*VNF_Catalogue/* - Collection of all Open Source VNFs
*heat_template/* - Sample HEAT templates for VNFs
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