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<!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<chapter id="overview">
<title>Overview</title>
<para>The NFV Access Guide available with this release of Enea
Linux, seeks to provide further information that will help all intended
users make the most out of the virtualization features.</para>
<section id="description">
<title>NFV Access Description</title>
<para>Enea NFV Access is a lightweight virtualization software
designed for deployment on edge devices at customer premises. Streamlined
for high networking performance and minimal footprints for both and VNFs, it enables very high compute density.</para>
<para>ENFV Access also provides a foundation for vCPE agility and
innovation, reducing cost and complexity for computing at the network
edge. It supports multiple architectures and scales from small white box
edge devices up to high-end network servers. Thanks to the streamlined
footprint, Enea NFV Access can be deployed on systems as small as single
2-core ARM devices. It scales up to clustered 24 core x86 Xeon servers and
beyond, allowing multiple VNFs on the same machine, and eliminating the
need to use different virtualization software for different hardware
platforms, saving costs through single source provisioning.</para>
<para>Optimized virtual networking performance provides low virtualized
networking latency, high virtualized networking throughput (10 Gb wire
speed), and low processing overhead. It allows high compute density on
white box hardware, maintaining performance when moving functionality from
application specific appliances to software on standard hardware. The
optimized boot speed minimizes the time from reboot to active services,
improving availability.</para>
<para>Enea NFV Access provides virtualization using both containers and
virtual machines. Containers provide lightweight virtualization for a
smaller VNF footprint and a very short time interval from start to enabled
network services. VMs provide virtualization with secure VNF sandboxing
and is the preferred virtualization method for OPNFV compliance. Enea NFV
Access allows combinations of containers and VMs for highest possible user
adaptability.</para>
<para>Flexible interfaces for VNF lifecycle management and service
function chaining, are important to allow a smooth transition from
traditional network appliances to virtualized network functions in
existing networks, as they plug into a variety of interfaces. Enea NFV
Access supports VNF lifecycle management and service function chaining
through OpenStack, NETCONF, REST, CLI and Docker. It integrates a powerful
device management framework that enables full FCAPS functionality for
powerful management of the platform.</para>
<para>Building on open source, Enea NFV Access prevents vendor lock-in
thanks to its completely open standards and interfaces. Unlike proprietary
platforms that either do not allow decoupling of software from hardware,
or prevent NVF portability, Enea NFV Access includes optimized components
with open interfaces to allow full portability and
interoperability.</para>
</section>
<section id="components">
<title>NFV Access Components</title>
<para>Enea NFV Access is built on highly optimized open source and
value-adding components that provide standard interfaces but with boosted
performance.</para>
<mediaobject>
<imageobject>
<imagedata align="center"
fileref="images/virtual_network_functions.png" />
</imageobject>
</mediaobject>
<para>The Access Platform includes the following key components:</para>
<itemizedlist>
<listitem>
<para>Linux Kernel – Optimized Linux kernel with the focus on
vCPE systems characteristics.</para>
</listitem>
<listitem>
<para>KVM – Virtualization with virtual machines. KVM is the
standard virtualization engine for Linux based systems.</para>
</listitem>
<listitem>
<para>Docker – Docker provides a lightweight configuration using
containers. Docker is the standard platform for container
virtualization.</para>
</listitem>
<listitem>
<para>Virtual switching – Optimized OVS-DPDK provides high
throughput and low latency.</para>
</listitem>
<listitem>
<para>Edge Link – Edge Link provides interfaces to orchestration
for centralized VNF lifecycle management and service function
chaining:</para>
<orderedlist>
<listitem>
<para>NETCONF</para>
</listitem>
<listitem>
<para>OpenStack</para>
</listitem>
<listitem>
<para>Docker</para>
</listitem>
<listitem>
<para>REST</para>
</listitem>
<listitem>
<para>CLI</para>
</listitem>
</orderedlist>
</listitem>
<listitem>
<para>APT packet management – Feature rich repository of
prebuilt open source packages for extending and adapting the platform
using APT Package Management.</para>
</listitem>
<listitem>
<para>CLI based VNF management – CLI access over virsh and
libvirt.</para>
</listitem>
<listitem>
<para>FCAPS framework – The device management framework for
managing the platform is capable of providing full FCAPS functionality
to orchestration or network management systems.</para>
</listitem>
<listitem>
<para>Data plane – High performance data plane that includes the
following optimized data plane drivers:</para>
<orderedlist>
<listitem>
<para>DPDK</para>
</listitem>
<listitem>
<para>OpenFastPath (OFP)</para>
</listitem>
<listitem>
<para>ODP</para>
</listitem>
</orderedlist>
</listitem>
</itemizedlist>
</section>
</chapter>
|
