162 lines
7.9 KiB
Plaintext
162 lines
7.9 KiB
Plaintext
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====================
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Version Constraints
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====================
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This document aims to highlight and aid in the resolution of issues involved
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in the implementation of OVS, as well as specific issues on installing
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OVS with DPDK. In addition to this, the document includes links to specific
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information relating to the installation of OVS with DPDK on specific
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Linux platforms.
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The information contained in this file is based on the FAQ document for OVS.
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https://github.com/openvswitch/ovs/blob/master/FAQ.md
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General Issues
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------------------
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* Each version of OVS only works with a Linux kernel version within a
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certain range:
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---------------------------------------
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| Open vSwitch | Linux Kernel Version |
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|--------------|----------------------|
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| 1.4.x | 2.6.18 to 3.2 |
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| 1.5.x | 2.6.18 to 3.2 |
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| 1.6.x | 2.6.18 to 3.2 |
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| 1.7.x | 2.6.18 to 3.3 |
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| 1.8.x | 2.6.18 to 3.4 |
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| 1.9.x | 2.6.18 to 3.8 |
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| 1.10.x | 2.6.18 to 3.8 |
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| 1.11.x | 2.6.18 to 3.8 |
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| 2.0.x | 2.6.32 to 3.10 |
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| 2.1.x | 2.6.32 to 3.11 |
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| 2.3.x | 2.6.32 to 3.14 |
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| 2.4.x | 2.6.32 to 4.0 |
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| 2.5.x | 2.6.32 to 4.3 |
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| 2.6.x | 3.10 to 4.7 |
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---------------------------------------
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https://github.com/openvswitch/ovs/blob/master/FAQ.md#q-what-linux-kernel-versions-does-each-open-vswitch-release-work-with
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* Linux Kernel version configuration error:
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| configure: error: Linux kernel in <dir> is version <x>, but
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| version newer than <y> is not supported (please refer to the
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| FAQ for advice)
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Solution options:
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* Use the kernel module supplied with the kernel.
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* The Open vSwitch master branch may support the kernel version that you are
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using, consider building kernel verison from master.
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The following link provides instructions on implementing this for a ubuntu
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release:
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https://wiki.ubuntu.com/Kernel/BuildYourOwnKernel
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* OVS can currently run on any Linux-based virtulization platform.
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E.g. KVM, VirtualBox, Xen, Xen Cloud Platform, XenServer.
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* Open vSwitch userspace should also work with the Linux kernel module built
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into Linux 3.3 and later. It is not sensitive to the Linux kernel version
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and should build against almost any kernel.
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* OVS supports different datapaths on different platforms, each with a
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different feature set.
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-------------------------------------------------------------------------------
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| Feature | Linux upstream | Linux OVS tree | Userspace | Hyper-V |
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|---------------------|----------------|----------------|-----------|---------|
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| NAT | 4.6 | YES | NO | NO |
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| Connection tracking | 4.3 | YES | PARTIAL | PARTIAL |
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| Tunnel-LISP | NO | YES | NO | NO |
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| Tunnel-STT | NO | YES | NO | YES |
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| Tunnel-GRE | 3.11 | YES | YES | YES |
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| Tunnel-VXLAN | 3.12 | YES | YES | YES |
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| Tunnel-Geneve | 3.18 | YES | YES | YES |
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| Tunnel-GRE-IPv6 | NO | NO | YES | NO |
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| Tunnel-VXLAN-IPv6 | 4.3 | YES | YES | NO |
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| Tunnel-Geneve-IPv6 | 4.4 | YES | YES | NO |
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| QoS-Policiing | YES | YES | YES | NO |
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| QoS-Shaping | YES | YES | NO | NO |
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| sFlow | YES | YES | YES | NO |
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| IPFIX | 3.10 | YES | YES | NO |
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| Set action | YES | YES | YES | PARTIAL |
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| NIC Bonding | YES | YES | YES | NO |
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| Multiple VTEP's | YES | YES | YES | NO |
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-------------------------------------------------------------------------------
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https://github.com/openvswitch/ovs/blob/master/FAQ.md#q-are-all-features-available-with-all-datapaths
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* DPDK versions that successfully build with Open vSwitch.
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------------------------
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| Open vSwitch | DPDK |
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|--------------|-------|
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| 2.2.x | 1.6 |
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| 2.3.x | 1.6 |
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| 2.4.x | 2.0 |
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| 2.5.x | 2.2 |
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| 2.6.x | 16.07 |
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------------------------
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https://github.com/openvswitch/ovs/blob/master/FAQ.md#q-what-dpdk-version-does-each-open-vswitch-release-work-with
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* If there is a performance drop when OVS is upgraded, this could mean that the
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OVS kernel datapath may have been updated to a newer version. Sometimes new
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versions of the OVS kernel module add functionality that is backwards
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compatible with older userspace components, but may cause a drop in
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performance with them. Updating the OVS userspace components to the latest
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released version should fix the performance degradation issue.
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* Open vSwitch only supports certain versions of OpenFlow:
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-----------------------------------------------------------------------------
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| Open vSwitch | OF1.0 | OF1.1 | OF1.2 | OF1.3 | OF1.4 | OF1.5 | OF1.6 |
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|-------------------|-------|-------|-------|-------|-------|-------|-------|
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| 1.9 and earlier | yes | --- | --- | --- | --- | --- | --- |
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| 1.10 | yes | --- | [*] | [*] | --- | --- | --- |
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| 1.11 | yes | --- | [*] | [*] | --- | --- | --- |
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| 2.0 | yes | [*] | [*] | [*] | --- | --- | --- |
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| 2.1 | yes | [*] | [*] | [*] | --- | --- | --- |
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| 2.2 | yes | [*] | [*] | [*] | [%] | [*] | --- |
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| 2.3 | yes | yes | yes | yes | [*] | [*] | --- |
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| 2.4 | yes | yes | yes | yes | [*] | [*] | --- |
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| 2.5 | yes | yes | yes | yes | [*] | [*] | [*] |
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-----------------------------------------------------------------------------
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[*] Supported, with one or more missing features.
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[%] Experimental, unsafe implementation.
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https://github.com/openvswitch/ovs/blob/master/FAQ.md#q-what-versions-of-openflow-does-open-vswitch-support
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In Open vSwitch 1.10 through 2.2, OpenFlow 1.1, 1.2 and 1.3 must be enabled
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manually in ovs-switched.
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OpenFlow 1.4 and 1.5 in Open vSwitch 2.3 and later, as well as OpenFlow 1.6
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in Open vSwitch 2.5 and later are supported but have missing features and so
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are not enabled by default.
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The user can overide any of these defaults:
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| ovs-vsctl set bridge br0 protocols=OpenFlow10,OpenFlow11,OpenFlow12,OpenFlow13
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| ovs-vsctl set bridge br0 protocols=OpenFlow10,OpenFlow11,OpenFlow12,OpenFlow13,OpenFlow14,OpenFlow15
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| ovs-vsctl set bridge br0 protocols=OpenFlow10
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All current versions of ovs-ofctl enable only OpenFlow 1.0 by default.
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Use the -O option to enable support for later versions of OpenFlow in
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ovs-ofctl.
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* Difficulty connecting to an OpenFlow controller or OVSDB manager may be due
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to specifying the wrong port numbers. In OVS 2.4, the default ports were
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switched to the IANA-specified port numbers.
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For Openflow: 6633->6653
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For OVSDB: 6632->6640
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Specific Platform based Issues with OVS and DPDK
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---------------------------------------------------
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Certain issues specific to the linux platform being used to install OVS with DPDK
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are highlighted in each of the getting started guides below.
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* Centos:
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https://github.com/openstack/networking-ovs-dpdk/tree/master/doc/source/getstarted/devstack/centos.rst
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* Fedora:
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https://github.com/openstack/networking-ovs-dpdk/tree/master/doc/source/getstarted/devstack/fedora.rst
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* Ubuntu:
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https://github.com/openstack/networking-ovs-dpdk/tree/master/doc/source/getstarted/devstack/ubuntu.rst
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