README.rst

   1 ============
   2 Open vSwitch
   3 ============
   4
   5 Build Status
   6 ------------
   7
   8 .. image:: https://travis-ci.org/openvswitch/ovs.png
   9     :target: https://travis-ci.org/openvswitch/ovs
  10
  11 What is Open vSwitch?
  12 ---------------------
  13
  14 Open vSwitch is a multilayer software switch licensed under the open source
  15 Apache 2 license.  Our goal is to implement a production quality switch
  16 platform that supports standard management interfaces and opens the forwarding
  17 functions to programmatic extension and control.
  18
  19 Open vSwitch is well suited to function as a virtual switch in VM environments.
  20 In addition to exposing standard control and visibility interfaces to the
  21 virtual networking layer, it was designed to support distribution across
  22 multiple physical servers.  Open vSwitch supports multiple Linux-based
  23 virtualization technologies including Xen/XenServer, KVM, and VirtualBox.
  24
  25 The bulk of the code is written in platform-independent C and is easily ported
  26 to other environments.  The current release of Open vSwitch supports the
  27 following features:
  28
  29 - Standard 802.1Q VLAN model with trunk and access ports
  30 - NIC bonding with or without LACP on upstream switch
  31 - NetFlow, sFlow(R), and mirroring for increased visibility
  32 - QoS (Quality of Service) configuration, plus policing
  33 - Geneve, GRE, VXLAN, STT, and LISP tunneling
  34 - 802.1ag connectivity fault management
  35 - OpenFlow 1.0 plus numerous extensions
  36 - Transactional configuration database with C and Python bindings
  37 - High-performance forwarding using a Linux kernel module
  38
  39 The included Linux kernel module supports Linux 3.10 and up.
  40
  41 Open vSwitch can also operate, at a cost in performance, entirely in userspace,
  42 without assistance from a kernel module.  This userspace implementation should
  43 be easier to port than the kernel-based switch.  It is considered experimental.
  44
  45 What's here?
  46 ------------
  47
  48 The main components of this distribution are:
  49
  50 - ovs-vswitchd, a daemon that implements the switch, along with a companion
  51   Linux kernel module for flow-based switching.
  52 - ovsdb-server, a lightweight database server that ovs-vswitchd queries to
  53   obtain its configuration.
  54 - ovs-dpctl, a tool for configuring the switch kernel module.
  55 - Scripts and specs for building RPMs for Citrix XenServer and Red Hat
  56   Enterprise Linux.  The XenServer RPMs allow Open vSwitch to be installed on a
  57   Citrix XenServer host as a drop-in replacement for its switch, with
  58   additional functionality.
  59 - ovs-vsctl, a utility for querying and updating the configuration of
  60   ovs-vswitchd.
  61 - ovs-appctl, a utility that sends commands to running Open vSwitch daemons.
  62
  63 Open vSwitch also provides some tools:
  64
  65 - ovs-ofctl, a utility for querying and controlling OpenFlow switches and
  66   controllers.
  67 - ovs-pki, a utility for creating and managing the public-key infrastructure
  68   for OpenFlow switches.
  69 - ovs-testcontroller, a simple OpenFlow controller that may be useful for
  70   testing (though not for production).
  71 - A patch to tcpdump that enables it to parse OpenFlow messages.
  72
  73 What other documentation is available?
  74 --------------------------------------
  75
  76 To install Open vSwitch on a regular Linux or FreeBSD host, please read the
  77 `installation guide <INSTALL.md>`__. For specifics around installation on a
  78 specific platform, please see one of the below installation guides:
  79
  80 - `Debian <INSTALL.Debian.rst>`__
  81 - `Fedora <INSTALL.Fedora.rst>`__
  82 - `RHEL <INSTALL.RHEL.md>`__
  83 - `XenServer <INSTALL.XenServer.rst>`__
  84 - `Windows <INSTALL.Windows.rst>`__
  85
  86 To use Open vSwitch...
  87
  88 - ...with Docker on Linux, see `here <INSTALL.Docker.rst>`__.
  89
  90 - ...with KVM on Linux, see `here <INSTALL.rst>`__ and `here
  91   <INSTALL.KVM.rst>`__.
  92
  93 - ...with Libvirt, see `here <INSTALL.Libvirt.md>`__.
  94
  95 - ...without using a kernel module, see `here <INSTALL.userspace.rst>`__.
  96
  97 - ...with DPDK, see `here <INSTALL.DPDK.rst>`__.
  98
  99 - ...with SELinux, see `here <INSTALL.SELinux.md>`__.
 100
 101 For answers to common questions, refer to the `FAQ <FAQ.rst>`__.
 102
 103 To learn how to set up SSL support for Open vSwitch, see `here
 104 <INSTALL.SSL.rst>`__.
 105
 106 To learn about some advanced features of the Open vSwitch software switch, read
 107 the `tutorial <tutorial/Tutorial.md>`__.
 108
 109 Each Open vSwitch userspace program is accompanied by a manpage.  Many of the
 110 manpages are customized to your configuration as part of the build process, so
 111 we recommend building Open vSwitch before reading the manpages.
 112
 113 Contact
 114 -------
 115
 116 bugs@openvswitch.org