+Post-v2.5.0
+---------------------
+ - ovsdb-server:
+ * New "monitor2" and "update2" extensions to RFC 7047.
+ - OpenFlow:
+ * OpenFlow 1.1+ OFPT_QUEUE_GET_CONFIG_REQUEST now supports OFPP_ANY.
+ * OpenFlow 1.4+ OFPMP_QUEUE_DESC is now supported.
+ * OpenFlow 1.4+ OFPT_TABLE_STATUS is now supported.
+ * New property-based packet-in message format NXT_PACKET_IN2 with support
+ for arbitrary user-provided data and for serializing flow table
+ traversal into a continuation for later resumption.
+ * New extension message NXT_SET_ASYNC_CONFIG2 to allow OpenFlow 1.4-like
+ control over asynchronous messages in earlier versions of OpenFlow.
+ - ovs-ofctl:
+ * queue-get-config command now allows a queue ID to be specified.
+ - DPDK:
+ * New option "n_rxq" for PMD interfaces.
+ Old 'other_config:n-dpdk-rxqs' is no longer supported.
+ * New appctl command 'dpif-netdev/pmd-rxq-show' to check the port/rxq
+ assignment.
+ * Type of log messages from PMD threads changed from INFO to DBG.
+ - ovs-benchmark: This utility has been removed due to lack of use and
+ bitrot.
+ - ovs-appctl:
+ * New "vlog/close" command.
+ - ovsdb-server:
+ * Remove max number of sessions limit, to enable connection scaling
+ testing.
+ - python:
+ * Added support for Python 3.4+ in addition to existing support
+ for 2.7+.
+
+v2.5.0 - xx xxx xxxx
+---------------------
+ - Dropped support for Python older than version 2.7. As a consequence,
+ using Open vSwitch 2.5 or later on XenServer 6.5 or earlier (which
+ have Python 2.4) requires first installing Python 2.7.
+ - OpenFlow:
+ * Group chaining (where one OpenFlow group triggers another) is
+ now supported.
+ * OpenFlow 1.4+ "importance" is now considered for flow eviction.
+ * OpenFlow 1.4+ OFPTC_EVICTION is now implemented.
+ * OpenFlow 1.4+ OFPTC_VACANCY_EVENTS is now implemented.
+ * OpenFlow 1.4+ OFPMP_TABLE_DESC is now implemented.
+ * Allow modifying the ICMPv4/ICMPv6 type and code fields.
+ * OpenFlow 1.4+ OFPT_SET_ASYNC_CONFIG and OFPT_GET_ASYNC_CONFIG are
+ now implemented.
+ - ovs-ofctl:
+ * New "out_group" keyword for OpenFlow 1.1+ matching on output group.
+ - Tunnels:
+ * Geneve tunnels can now match and set options and the OAM bit.
+ * The nonstandard GRE64 tunnel extension has been dropped.
+ - Support Multicast Listener Discovery (MLDv1 and MLDv2).
+ - Add 'symmetric_l3l4' and 'symmetric_l3l4+udp' hash functions.
+ - sFlow agent now reports tunnel and MPLS structures.
+ - New 'check-system-userspace', 'check-kmod' and 'check-kernel' Makefile
+ targets to run a new system testsuite. These tests can be run inside
+ a Vagrant box. See INSTALL.md for details
+ - Mark --syslog-target argument as deprecated. It will be removed in
+ the next OVS release.
+ - Added --user option to all daemons
+ - Add support for connection tracking through the new "ct" action
+ and "ct_state"/"ct_zone"/"ct_mark"/"ct_label" match fields. Only
+ available on Linux kernels with the connection tracking module loaded.
+ - Add experimental version 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.
+ - RHEL packaging:
+ * DPDK ports may now be created via network scripts (see README.RHEL).
+ - DPDK:
+ * Requires DPDK 2.2
+ * Added multiqueue support to vhost-user
+ * Note: QEMU 2.5+ required for multiqueue support
+
+v2.4.0 - 20 Aug 2015