3 - Bridge compatibility support has been removed. Any uses that
4 rely on ovs-brcompatd will have to stick with Open vSwitch 1.9.x
5 or adapt to native Open vSwitch support (e.g. use ovs-vsctl instead
7 - The maximum size of the MAC learning table is now configurable.
8 - New support for the VXLAN tunnel protocol (see the IETF draft here:
9 http://tools.ietf.org/html/draft-mahalingam-dutt-dcops-vxlan-02).
10 - With the Linux datapath, packets for new flows are now queued
11 separately on a per-port basis, so it should no longer be
12 possible for a large number of new flows arriving on one port to
13 prevent new flows from being processed on other ports.
14 - Many "ovs-vsctl" database commands now accept an --if-exists option.
15 Please refer to the ovs-vsctl manpage for details.
17 - Experimental support for newer versions of OpenFlow. See
18 the "What versions of OpenFlow does Open vSwitch support?"
19 question in the FAQ for more details.
20 - The OpenFlow "dp_desc" may now be configured by setting the
21 value of other-config:dp-desc in the Bridge table.
22 - It is possible to request the OpenFlow port number with the
23 "ofport_request" column in the Interface table.
25 - The "dump-flows" and "del-flows" no longer require an argument
26 if only one datapath exists.
28 - New "vlog/disable-rate-limit" and "vlog/enable-rate-limit"
29 commands available allow control over logging rate limits.
30 - New "dpif/dump-dps", "dpif/show", and "dpif/dump-flows" command
31 that mimic the equivalent ovs-dpctl commands.
32 - Path MTU discovery is no longer supported.
33 - The ofproto library is now responsible for assigning OpenFlow port
34 numbers. An ofproto implementation should assign them when
35 port_construct() is called.
36 - All dpif-based bridges of a particular type share a common
37 datapath called "ovs-<type>", e.g. "ovs-system". The ovs-dpctl
38 commands will now return information on that shared datapath. To
39 get the equivalent bridge-specific information, use the new
40 "ovs-appctl dpif/*" commands.
41 - Backward-incompatible changes:
42 - Earlier Open vSwitch versions treated ANY as a wildcard in flow
43 syntax. OpenFlow 1.1 adds a port named ANY, which introduces a
44 conflict. ANY was rarely used in flow syntax, so we chose to
45 retire that meaning of ANY in favor of the OpenFlow 1.1 meaning.
46 - Inheritance of the Don't Fragment bit in IP tunnels (df_inherit) is
48 - Patch ports are implemented in userspace.
49 - Tunneling requires the version of the kernel module paired with Open
50 vSwitch 1.9.0 or later.
55 - The tunneling code no longer assumes input and output keys are symmetric.
56 If they are not, PMTUD needs to be disabled for tunneling to work. Note
57 this only applies to flow-based keys.
59 - Support for ipv6 set action.
60 - SKB mark matching and setting.
61 - support for Linux kernels up to 3.8
62 - FreeBSD is now a supported platform, thanks to code contributions from
63 Gaetano Catalli, Ed Maste, and Giuseppe Lettieri.
64 - ovs-bugtool: New --ovs option to report only OVS related information.
65 - New %t and %T log escapes to identify the subprogram within a
66 cooperating group of processes or threads that emitted a log message.
67 The default log patterns now include this information.
69 - Allow bitwise masking for SHA and THA fields in ARP, SLL and TLL
70 fields in IPv6 neighbor discovery messages, and IPv6 flow label.
71 - Adds support for writing to the metadata field for a flow.
73 - Commands and actions that accept port numbers now also accept keywords
74 that represent those ports (such as LOCAL, NONE, and ALL). This is
75 also the recommended way to specify these ports, for compatibility
76 with OpenFlow 1.1 and later (which use the OpenFlow 1.0 numbers
77 for these ports for different purposes).
79 - Support requesting the port number with the "port_no" option in
81 - ovs-pki: The "online PKI" features have been removed, along with
82 the ovs-pki-cgi program that facilitated it, because of some
83 alarmist insecurity claims. We do not believe that these claims
84 are true, but because we do not know of any users for this
85 feature it seems better on balance to remove it. (The ovs-pki-cgi
86 program was not included in distribution packaging.)
87 - Tunnel Path MTU Discovery default value was set to 'disabled'. This
88 feature is deprecated and will be removed soon.
89 - ovsdb-server now enforces the immutability of immutable columns. This
90 was not enforced in earlier versions due to an oversight.
91 - New support for a nonstandard form of GRE that supports a 64-bit key.
92 - The following features are now deprecated. They will be removed no
93 earlier than February 2013. Please email dev@openvswitch.org with
95 - Bridge compatibility.
97 - The autopath action.
98 - Interface type "null".
99 - Numeric values for reserved ports (see "ovs-ofctl" note above).
100 - Tunnel Path MTU Discovery.
101 - CAPWAP tunnel support.
102 - The data in the RARP packets can now be matched in the same way as the
104 - Tunnel header caching removed.
108 ------------------------
109 - New FAQ. Please send updates and additions!
110 - Authors of controllers, please read the new section titled "Action
111 Reproduction" in DESIGN, which describes an Open vSwitch change in
112 behavior in corner cases that may affect some controllers.
114 - A new test utility that can create L3 tunnel between two Open
115 vSwitches and detect connectivity issues.
117 - New --sort and --rsort options for "dump-flows" command.
118 - "mod-port" command can now control all OpenFlow config flags.
120 - Allow general bitwise masking for IPv4 and IPv6 addresses in
121 IPv4, IPv6, and ARP packets. (Previously, only CIDR masks
123 - Allow support for arbitrary Ethernet masks. (Previously, only
124 the multicast bit in the destination address could be individually
126 - New field OXM_OF_METADATA, to align with OpenFlow 1.1.
127 - The OFPST_QUEUE request now reports an error if a specified port or
128 queue does not exist, or for requests for a specific queue on all
129 ports, if the specified queue does not exist on any port. (Previous
130 versions generally reported an empty set of results.)
131 - New "flow monitor" feature to allow controllers to be notified of
132 flow table changes as they happen.
133 - Additional protocols are not mirrored and dropped when forward-bpdu is
134 false. For a full list, see the ovs-vswitchd.conf.db man page.
135 - Open vSwitch now sends RARP packets in situations where it previously
136 sent a custom protocol, making it consistent with behavior of QEMU and
138 - All Open vSwitch programs and log files now show timestamps in UTC,
139 instead the local timezone, by default.
143 ------------------------
144 - kernel modules are renamed. openvswitch_mod.ko is now
145 openvswitch.ko and brcompat_mod.ko is now brcompat.ko.
146 - Increased the number of NXM registers to 8.
147 - Added ability to configure DSCP setting for manager and controller
148 connections. By default, these connections have a DSCP value of
149 Internetwork Control (0xc0).
150 - Added the granular link health statistics, 'cfm_health', to an
153 - Added support to mask nd_target for ICMPv6 neighbor discovery flows.
154 - Added support for OpenFlow 1.3 port description (OFPMP_PORT_DESC)
157 - Added the "dump-ports-desc" command to retrieve port
158 information using the new port description multipart messages.
160 - Added support for spawning ovs-test server from the client.
161 - Now ovs-test is able to automatically create test bridges and ports.
162 - "ovs-dpctl dump-flows" now prints observed TCP flags in TCP flows.
163 - Tripled flow setup performance.
164 - The "coverage/log" command previously available through ovs-appctl
165 has been replaced by "coverage/show". The new command replies with
166 coverage counter values, instead of logging them.
170 ------------------------
171 - Allow OFPP_CONTROLLER as the in_port for packet-out messages.
175 ------------------------
176 *** Internal only release ***
178 - LACP bonds no longer fall back to balance-slb when negotiations fail.
179 Instead they drop traffic.
180 - The default bond_mode changed from SLB to active-backup, to protect
181 unsuspecting users from the significant risks of SLB bonds (which are
182 documented in vswitchd/INTERNALS).
183 - Load balancing can be disabled by setting the bond-rebalance-interval
186 - Added support for bitwise matching on TCP and UDP ports.
187 See ovs-ofctl(8) for more information.
188 - NXM flow dumps now include times elapsed toward idle and hard
190 - Added an OpenFlow extension NXT_SET_ASYNC_CONFIG that allows
191 controllers more precise control over which OpenFlow messages they
192 receive asynchronously.
193 - New "fin_timeout" action.
194 - Added "fin_timeout" support to "learn" action.
195 - New Nicira action NXAST_CONTROLLER that offers additional features
196 over output to OFPP_CONTROLLER.
197 - When QoS settings for an interface do not configure a default queue
198 (queue 0), Open vSwitch now uses a default configuration for that
199 queue, instead of dropping all packets as in previous versions.
201 - Logging to console and file will have UTC timestamp as a default for
202 all the daemons. An example of the default format is
203 2012-01-27T16:35:17Z. ovs-appctl can be used to change the default
205 - The syntax of commands and options to set log levels was simplified,
206 to make it easier to remember.
207 - New support for limiting the number of flows in an OpenFlow flow
208 table, with configurable policy for evicting flows upon
209 overflow. See the Flow_Table table in ovs-vswitch.conf.db(5)
210 for more information.
211 - New "enable-async-messages" column in the Controller table. If set to
212 false, OpenFlow connections to the controller will initially have all
213 asynchronous messages disabled, overriding normal OpenFlow behavior.
214 - ofproto-provider interface:
215 - "struct rule" has a new member "used" that ofproto implementations
216 should maintain by updating with ofproto_rule_update_used().
218 - The new option --timestamp causes the "monitor" command to print
219 a timestamp with every update.
220 - CFM module CCM broadcasts can now be tagged with an 802.1p priority.
224 ------------------------
226 - Added support for querying, modifying, and deleting flows
227 based on flow cookie when using NXM.
228 - Added new NXM_PACKET_IN format.
229 - Added new NXAST_DEC_TTL action.
231 - Added daemonization support to the monitor and snoop commands.
233 - The "find" command supports new set relational operators
234 {=}, {!=}, {<}, {>}, {<=}, and {>=}.
235 - ovsdb-tool now uses the typical database and schema installation
236 directories as defaults.
237 - The default MAC learning timeout has been increased from 60 seconds
238 to 300 seconds. The MAC learning timeout is now configurable.
242 ------------------------
243 - Compatible with Open vSwitch kernel module included in Linux 3.3.
244 - New "VLAN splinters" feature to work around buggy device drivers
245 in old Linux versions. (This feature is deprecated. When
246 broken device drivers are no longer in widespread use, we will
247 delete this feature.) See ovs-vswitchd.conf.db(5) for more
250 - Added ability to match on IPv6 flow label through NXM.
251 - Added ability to match on ECN bits in IPv4 and IPv6 through NXM.
252 - Added ability to match on TTL in IPv4 and IPv6 through NXM.
253 - Added ability to modify ECN bits in IPv4.
254 - Added ability to modify TTL in IPv4.
256 - Don't require the "normal" action to use mirrors. Traffic will
257 now be properly mirrored for any flows, regardless of their
259 - Track packet and byte statistics sent on mirrors.
260 - The sFlow implementation can now usually infer the correct agent
261 device instead of having to be told explicitly.
263 - New "fdb/flush" command to flush bridge's MAC learning table.
265 - A new distributed testing tool that allows one to diagnose performance
266 and connectivity issues. This tool currently is not included in RH or
268 - RHEL packaging now supports integration with Red Hat network scripts.
270 - Post 1.4.*, OVS will be changing the default bond mode from balance-slb
271 to active-backup. SLB bonds carry significant risks with them
272 (documented vswitchd/INTERNALS) which we want to prevent unsuspecting
273 users from running into. Users are advised to update any scripts or
274 configuration which may be negatively impacted by explicitly setting
275 the bond mode which they want to use.
279 ------------------------
281 - Added an OpenFlow extension which allows the "output" action to accept
283 - Added an OpenFlow extension for flexible learning.
284 - Bumped number of NXM registers from four to five.
286 - New "version" command to determine version of running daemon.
287 - If no argument is provided for "cfm/show", displays detailed
288 information about all interfaces with CFM enabled.
289 - If no argument is provided for "lacp/show", displays detailed
290 information about all ports with LACP enabled.
292 - New "set-if" command to modify a datapath port's configuration.
294 - The software switch now supports 255 OpenFlow tables, instead
295 of just one. By default, only table 0 is consulted, but the
296 new NXAST_RESUBMIT_TABLE action can look up in additional
297 tables. Tables 128 and above are reserved for use by the
298 switch itself; please use only tables 0 through 127.
299 - Add support for 802.1D spanning tree (STP).
300 - Fragment handling extensions:
301 - New OFPC_FRAG_NX_MATCH fragment handling mode, in which L4
302 fields are made available for matching in fragments with
304 - New NXM_NX_IP_FRAG match field for matching IP fragments (usable
305 via "ip_frag" in ovs-ofctl).
306 - New ovs-ofctl "get-frags" and "set-frags" commands to get and set
307 fragment handling policy.
308 - CAPWAP tunneling now supports an extension to transport a 64-bit key.
309 By default it remains compatible with the old version and other
310 standards-based implementations.
311 - Flow setups are now processed in a round-robin manner across ports
312 to prevent any single client from monopolizing the CPU and conducting
313 a denial of service attack.
314 - Added support for native VLAN tagging. A new "vlan_mode"
315 parameter can be set for "port". Possible values: "access",
316 "trunk", "native-tagged" and "native-untagged".
317 - test-openflowd has been removed. Please use ovs-vswitchd instead.
320 ------------------------
321 - New "ofproto" abstraction layer to ease porting to hardware
323 - Packaging for Red Hat Enterprise Linux 5.6 and 6.0.
324 - Datapath support for Linux kernels up to 3.0.
326 - New "bundle" and "bundle_load" action extensions.
328 - Implement table unique constraints.
329 - Support cooperative locking between callers.
331 - New "-s" option for "show" command prints packet and byte
332 counters for each port.
334 - New "--readd" option for "replace-flows".
336 - New "show" command to print an overview of configuration.
337 - New "comment" command to add remark that explains intentions.
338 - ovs-brcompatd has been rewritten to fix long-standing bugs.
339 - ovs-openflowd has been renamed test-openflowd and moved into the
340 tests directory. Its presence confused too many users. Please
341 use ovs-vswitchd instead.
342 - New ovs-benchmark utility to test flow setup performance.
343 - A new log level "off" has been added. Configuring a log facility
344 "off" prevents any messages from being logged to it. Previously,
345 "emer" was effectively "off" because no messages were ever logged at
346 level "emer". Now, errors that cause a process to exit are logged
348 - "configure" option --with-l26 has been renamed --with-linux, and
349 --with-l26-source has been renamed --with-linux-source. The old
350 names will be removed after the next release, so please update
352 - The "-2.6" suffix has been dropped from the datapath/linux-2.6 and
353 datapath/linux-2.6/compat-2.6 directories.
355 - Dropped support for "tun_id_from_cookie" OpenFlow extension.
356 Please use the extensible match extensions instead.
357 - Removed the Maintenance_Point and Monitor tables in an effort
358 to simplify 802.1ag configuration.
359 - Performance and scalability improvements
363 ------------------------
364 - Ability to define policies over IPv6
367 - Support for extensible match extensions to OpenFlow
369 - Support for HFSC qdisc.
370 - Queue used by in-band control can now be configured.
372 - Kernel<->userspace interface has been reworked and should be
373 close to a stable ABI now.
374 - "Port group" concept has been dropped.
375 - GRE over IPSEC tunnels
377 - New active backup bonding mode.
378 - New L4 hashing support when LACP is enabled.
379 - Source MAC hash now includes VLAN field also.
381 - Greatly improved handling of large flow tables
383 - "show" command now prints full vport configuration.
384 - "dump-groups" command removed since kernel support for
385 port groups was dropped.
387 - New commands for working with the new Managers table.
388 - "list" command enhanced with new formatting options and --columns
390 - "get" command now accepts new --id option.
391 - New "find" command.
393 - New "queue-stats" command for printing queue stats.
394 - New commands "replace-flows" and "diff-flows".
395 - Commands to add and remove flows can now read from files.
396 - New --flow-format option to enable or disable NXM.
397 - New --more option to increase OpenFlow message verbosity.
398 - Removed "tun-cookie" command, which is no longer useful.
399 - ovs-controller enhancements for testing various features.
400 - New ovs-vlan-test command for testing for Linux kernel driver VLAN
401 bugs. New ovs-vlan-bug-workaround command for enabling and
402 disabling a workaround for these driver bugs.
404 - "Resubmit" actions now update flow statistics.
405 - New "register" extension for use in matching and actions, via NXM.
406 - New "multipath" experimental action extension.
407 - New support for matching multicast Ethernet frames, via NXM.
408 - New extension for OpenFlow vendor error codes.
409 - New extension to set the QoS output queue without actually
410 sending to an output port.
411 - Open vSwitch now reports a single flow table, instead of
412 separate hash and wildcard tables. This better models the
413 current implementation.
414 - New experimental "note" action.
415 - New "ofproto/trace" ovs-appctl command and associated utilities
416 to ease debugging complex flow tables.
418 - Schema documentation now includes an entity-relationship diagram.
419 - The database is now garbage collected. In most tables,
420 unreferenced rows will be deleted automatically.
421 - Many tables now include statistics updated periodically by
422 ovs-vswitchd or ovsdb-server.
423 - Every table now has an "external-ids" column for use by OVS
425 - There is no default controller anymore. Each bridge must have its
426 controller individually specified.
427 - The "fail-mode" is now a property of a Bridge instead of a Controller.
428 - New versioning and checksum features.
429 - New Managers table and manager_options column in Open_vSwitch table
430 for specifying managers. The old "managers" column in the
431 Open_vSwitch table has been removed.
432 - Many "name" columns are now immutable.
434 - Dropped support for XenServer pre-5.6.100.
435 - Dropped support for Linux pre-2.6.18.
436 - Dropped controller discovery support.
437 - Dropped "ovs-ofctl status" and the OpenFlow extension that it used.
438 Statistics reporting in the database is a rough equivalent.
439 - Dropped the "corekeeper" package (now separate, at
440 http://openvswitch.org/cgi-bin/gitweb.cgi?p=corekeeper).
441 - Performance and scalability improvements
444 v1.1.0pre2 - 13 Sep 2010
445 ------------------------
448 v1.1.0pre1 - 31 Aug 2010
449 ------------------------
450 - OpenFlow 1.0 slicing (QoS) functionality
451 - Python bindings for configuration database (no write support)
452 - Performance and scalability improvements
457 - New "patch" interface type
462 - Configuration database with remote management
465 - Support for XenServer 5.5 and 5.6
466 - Performance and scalability improvements
469 v0.99.2 - 18 Feb 2010
470 ---------------------
473 v0.99.1 - 25 Jan 2010
474 ---------------------
475 - Add support for sFlow(R)
476 - Make headers compatible with C++
479 v0.99.0 - 14 Jan 2010
480 ---------------------
481 - User-space forwarding engine
484 v0.90.7 - 29 Nov 2009
485 ---------------------
486 - Add support for NetFlow active timeouts
493 v0.90.5 - 21 Sep 2009
494 ---------------------
495 - Generalize in-band control to more diverse network setups