[ovs-announce] Open vSwitch 2.5.0 Available

Justin Pettit jpettit at ovn.org
Sat Feb 27 10:38:34 PST 2016

The Open vSwitch team is pleased to announce the release of Open vSwitch 2.5.0:


This release includes the highly anticipated support for connection tracking in the Linux kernel.  This feature makes it possible to implement stateful firewalls and will be the basis for future stateful features such as NAT and load-balancing.  Work is underway to bring connection tracking to the userspace datapath (used by DPDK) and the port to Hyper-V.

A few other feature highlights of 2.5.0 include::

 - Experimental support of OVN.  OVN, the Open Virtual Network, is a
   system to support virtual network abstraction.  OVN complements the
   existing capabilities of OVS to add native support for virtual network
   abstractions, such as virtual L2 and L3 overlays and security groups.

 - Support Multicast Listener Discovery (MLDv1 and MLDv2).

 - sFlow agent now reports tunnel and MPLS structures.

 - Multiqueue support to vhost-user for the DPDK datapath.

 - And many others.  See the full change log here:


The 2.5 series represents the new LTS (long-term support) branch.  We will continue to support the 2.3 series until August of 2016 and anticipate releasing 2.3.3 in the next few weeks.


--The Open vSwitch Team   

Open vSwitch is a production quality, multilayer open source virtual switch. It is designed to enable massive network automation through programmatic extension, while still supporting standard management interfaces. Open vSwitch can operate both as a soft switch running within the hypervisor, and as the control stack for switching silicon. It has been ported to multiple virtualization platforms and switching chipsets.

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