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 - With the Linux datapath, packets for new flows are now queued
9 separately on a per-port basis, so it should no longer be
10 possible for a large number of new flows arriving on one port to
11 prevent new flows from being processed on other ports.
12 - Many "ovs-vsctl" database commands now accept an --if-exists option.
13 Please refer to the ovs-vsctl manpage for details.
15 - Experimental support for newer versions of OpenFlow. See
16 the "What versions of OpenFlow does Open vSwitch support?"
17 question in the FAQ for more details.
18 - The OpenFlow "dp_desc" may now be configured by setting the
19 value of other-config:dp-desc in the Bridge table.
20 - It is possible to request the OpenFlow port number with the
21 "ofport_request" column in the Interface table.
22 - The NXM flow_removed message now reports the OpenFlow table ID
23 from which the flow was removed.
25 - New support for the VXLAN tunnel protocol (see the IETF draft here:
26 http://tools.ietf.org/html/draft-mahalingam-dutt-dcops-vxlan-03).
27 - Tunneling requires the version of the kernel module paired with
28 Open vSwitch 1.9.0 or later.
29 - Inheritance of the Don't Fragment bit in IP tunnels (df_inherit)
30 is no longer supported.
31 - Path MTU discovery is no longer supported.
33 - The "dump-flows" and "del-flows" no longer require an argument
34 if only one datapath exists.
36 - New "vlog/disable-rate-limit" and "vlog/enable-rate-limit"
37 commands available allow control over logging rate limits.
38 - New "dpif/dump-dps", "dpif/show", and "dpif/dump-flows" command
39 that mimic the equivalent ovs-dpctl commands.
40 - The ofproto library is now responsible for assigning OpenFlow port
41 numbers. An ofproto implementation should assign them when
42 port_construct() is called.
43 - All dpif-based bridges of a particular type share a common
44 datapath called "ovs-<type>", e.g. "ovs-system". The ovs-dpctl
45 commands will now return information on that shared datapath. To
46 get the equivalent bridge-specific information, use the new
47 "ovs-appctl dpif/*" commands.
48 - Backward-incompatible changes:
49 - Earlier Open vSwitch versions treated ANY as a wildcard in flow
50 syntax. OpenFlow 1.1 adds a port named ANY, which introduces a
51 conflict. ANY was rarely used in flow syntax, so we chose to
52 retire that meaning of ANY in favor of the OpenFlow 1.1 meaning.
53 - Patch ports no longer require kernel support, so they now work
54 with FreeBSD and the kernel module built into Linux 3.3 and later.
55 - CAPWAP tunneling support removed.
61 - Support for ipv6 set action.
62 - SKB mark matching and setting.
63 - support for Linux kernels up to 3.8
64 - FreeBSD is now a supported platform, thanks to code contributions from
65 Gaetano Catalli, Ed Maste, and Giuseppe Lettieri.
66 - ovs-bugtool: New --ovs option to report only OVS related information.
67 - New %t and %T log escapes to identify the subprogram within a
68 cooperating group of processes or threads that emitted a log message.
69 The default log patterns now include this information.
71 - Allow bitwise masking for SHA and THA fields in ARP, SLL and TLL
72 fields in IPv6 neighbor discovery messages, and IPv6 flow label.
73 - Adds support for writing to the metadata field for a flow.
75 - The tunneling code no longer assumes input and output keys are
76 symmetric. If they are not, PMTUD needs to be disabled for
77 tunneling to work. Note this only applies to flow-based keys.
78 - New support for a nonstandard form of GRE that supports a 64-bit key.
79 - Tunnel Path MTU Discovery default value was set to 'disabled'.
80 This feature is deprecated and will be removed soon.
81 - Tunnel header caching removed.
83 - Commands and actions that accept port numbers now also accept keywords
84 that represent those ports (such as LOCAL, NONE, and ALL). This is
85 also the recommended way to specify these ports, for compatibility
86 with OpenFlow 1.1 and later (which use the OpenFlow 1.0 numbers
87 for these ports for different purposes).
89 - Support requesting the port number with the "port_no" option in
91 - ovs-pki: The "online PKI" features have been removed, along with
92 the ovs-pki-cgi program that facilitated it, because of some
93 alarmist insecurity claims. We do not believe that these claims
94 are true, but because we do not know of any users for this
95 feature it seems better on balance to remove it. (The ovs-pki-cgi
96 program was not included in distribution packaging.)
97 - ovsdb-server now enforces the immutability of immutable columns. This
98 was not enforced in earlier versions due to an oversight.
99 - The following features are now deprecated. They will be removed no
100 earlier than February 2013. Please email dev@openvswitch.org with
102 - Bridge compatibility.
104 - The autopath action.
105 - Interface type "null".
106 - Numeric values for reserved ports (see "ovs-ofctl" note above).
107 - Tunnel Path MTU Discovery.
108 - CAPWAP tunnel support.
109 - The data in the RARP packets can now be matched in the same way as the
114 ------------------------
115 - New FAQ. Please send updates and additions!
116 - Authors of controllers, please read the new section titled "Action
117 Reproduction" in DESIGN, which describes an Open vSwitch change in
118 behavior in corner cases that may affect some controllers.
120 - A new test utility that can create L3 tunnel between two Open
121 vSwitches and detect connectivity issues.
123 - New --sort and --rsort options for "dump-flows" command.
124 - "mod-port" command can now control all OpenFlow config flags.
126 - Allow general bitwise masking for IPv4 and IPv6 addresses in
127 IPv4, IPv6, and ARP packets. (Previously, only CIDR masks
129 - Allow support for arbitrary Ethernet masks. (Previously, only
130 the multicast bit in the destination address could be individually
132 - New field OXM_OF_METADATA, to align with OpenFlow 1.1.
133 - The OFPST_QUEUE request now reports an error if a specified port or
134 queue does not exist, or for requests for a specific queue on all
135 ports, if the specified queue does not exist on any port. (Previous
136 versions generally reported an empty set of results.)
137 - New "flow monitor" feature to allow controllers to be notified of
138 flow table changes as they happen.
139 - Additional protocols are not mirrored and dropped when forward-bpdu is
140 false. For a full list, see the ovs-vswitchd.conf.db man page.
141 - Open vSwitch now sends RARP packets in situations where it previously
142 sent a custom protocol, making it consistent with behavior of QEMU and
144 - All Open vSwitch programs and log files now show timestamps in UTC,
145 instead the local timezone, by default.
149 ------------------------
150 - kernel modules are renamed. openvswitch_mod.ko is now
151 openvswitch.ko and brcompat_mod.ko is now brcompat.ko.
152 - Increased the number of NXM registers to 8.
153 - Added ability to configure DSCP setting for manager and controller
154 connections. By default, these connections have a DSCP value of
155 Internetwork Control (0xc0).
156 - Added the granular link health statistics, 'cfm_health', to an
159 - Added support to mask nd_target for ICMPv6 neighbor discovery flows.
160 - Added support for OpenFlow 1.3 port description (OFPMP_PORT_DESC)
163 - Added the "dump-ports-desc" command to retrieve port
164 information using the new port description multipart messages.
166 - Added support for spawning ovs-test server from the client.
167 - Now ovs-test is able to automatically create test bridges and ports.
168 - "ovs-dpctl dump-flows" now prints observed TCP flags in TCP flows.
169 - Tripled flow setup performance.
170 - The "coverage/log" command previously available through ovs-appctl
171 has been replaced by "coverage/show". The new command replies with
172 coverage counter values, instead of logging them.
176 ------------------------
177 - Allow OFPP_CONTROLLER as the in_port for packet-out messages.
181 ------------------------
182 *** Internal only release ***
184 - LACP bonds no longer fall back to balance-slb when negotiations fail.
185 Instead they drop traffic.
186 - The default bond_mode changed from SLB to active-backup, to protect
187 unsuspecting users from the significant risks of SLB bonds (which are
188 documented in vswitchd/INTERNALS).
189 - Load balancing can be disabled by setting the bond-rebalance-interval
192 - Added support for bitwise matching on TCP and UDP ports.
193 See ovs-ofctl(8) for more information.
194 - NXM flow dumps now include times elapsed toward idle and hard
196 - Added an OpenFlow extension NXT_SET_ASYNC_CONFIG that allows
197 controllers more precise control over which OpenFlow messages they
198 receive asynchronously.
199 - New "fin_timeout" action.
200 - Added "fin_timeout" support to "learn" action.
201 - New Nicira action NXAST_CONTROLLER that offers additional features
202 over output to OFPP_CONTROLLER.
203 - When QoS settings for an interface do not configure a default queue
204 (queue 0), Open vSwitch now uses a default configuration for that
205 queue, instead of dropping all packets as in previous versions.
207 - Logging to console and file will have UTC timestamp as a default for
208 all the daemons. An example of the default format is
209 2012-01-27T16:35:17Z. ovs-appctl can be used to change the default
211 - The syntax of commands and options to set log levels was simplified,
212 to make it easier to remember.
213 - New support for limiting the number of flows in an OpenFlow flow
214 table, with configurable policy for evicting flows upon
215 overflow. See the Flow_Table table in ovs-vswitch.conf.db(5)
216 for more information.
217 - New "enable-async-messages" column in the Controller table. If set to
218 false, OpenFlow connections to the controller will initially have all
219 asynchronous messages disabled, overriding normal OpenFlow behavior.
220 - ofproto-provider interface:
221 - "struct rule" has a new member "used" that ofproto implementations
222 should maintain by updating with ofproto_rule_update_used().
224 - The new option --timestamp causes the "monitor" command to print
225 a timestamp with every update.
226 - CFM module CCM broadcasts can now be tagged with an 802.1p priority.
230 ------------------------
232 - Added support for querying, modifying, and deleting flows
233 based on flow cookie when using NXM.
234 - Added new NXM_PACKET_IN format.
235 - Added new NXAST_DEC_TTL action.
237 - Added daemonization support to the monitor and snoop commands.
239 - The "find" command supports new set relational operators
240 {=}, {!=}, {<}, {>}, {<=}, and {>=}.
241 - ovsdb-tool now uses the typical database and schema installation
242 directories as defaults.
243 - The default MAC learning timeout has been increased from 60 seconds
244 to 300 seconds. The MAC learning timeout is now configurable.
248 ------------------------
249 - Compatible with Open vSwitch kernel module included in Linux 3.3.
250 - New "VLAN splinters" feature to work around buggy device drivers
251 in old Linux versions. (This feature is deprecated. When
252 broken device drivers are no longer in widespread use, we will
253 delete this feature.) See ovs-vswitchd.conf.db(5) for more
256 - Added ability to match on IPv6 flow label through NXM.
257 - Added ability to match on ECN bits in IPv4 and IPv6 through NXM.
258 - Added ability to match on TTL in IPv4 and IPv6 through NXM.
259 - Added ability to modify ECN bits in IPv4.
260 - Added ability to modify TTL in IPv4.
262 - Don't require the "normal" action to use mirrors. Traffic will
263 now be properly mirrored for any flows, regardless of their
265 - Track packet and byte statistics sent on mirrors.
266 - The sFlow implementation can now usually infer the correct agent
267 device instead of having to be told explicitly.
269 - New "fdb/flush" command to flush bridge's MAC learning table.
271 - A new distributed testing tool that allows one to diagnose performance
272 and connectivity issues. This tool currently is not included in RH or
274 - RHEL packaging now supports integration with Red Hat network scripts.
276 - Post 1.4.*, OVS will be changing the default bond mode from balance-slb
277 to active-backup. SLB bonds carry significant risks with them
278 (documented vswitchd/INTERNALS) which we want to prevent unsuspecting
279 users from running into. Users are advised to update any scripts or
280 configuration which may be negatively impacted by explicitly setting
281 the bond mode which they want to use.
285 ------------------------
287 - Added an OpenFlow extension which allows the "output" action to accept
289 - Added an OpenFlow extension for flexible learning.
290 - Bumped number of NXM registers from four to five.
292 - New "version" command to determine version of running daemon.
293 - If no argument is provided for "cfm/show", displays detailed
294 information about all interfaces with CFM enabled.
295 - If no argument is provided for "lacp/show", displays detailed
296 information about all ports with LACP enabled.
298 - New "set-if" command to modify a datapath port's configuration.
300 - The software switch now supports 255 OpenFlow tables, instead
301 of just one. By default, only table 0 is consulted, but the
302 new NXAST_RESUBMIT_TABLE action can look up in additional
303 tables. Tables 128 and above are reserved for use by the
304 switch itself; please use only tables 0 through 127.
305 - Add support for 802.1D spanning tree (STP).
306 - Fragment handling extensions:
307 - New OFPC_FRAG_NX_MATCH fragment handling mode, in which L4
308 fields are made available for matching in fragments with
310 - New NXM_NX_IP_FRAG match field for matching IP fragments (usable
311 via "ip_frag" in ovs-ofctl).
312 - New ovs-ofctl "get-frags" and "set-frags" commands to get and set
313 fragment handling policy.
314 - CAPWAP tunneling now supports an extension to transport a 64-bit key.
315 By default it remains compatible with the old version and other
316 standards-based implementations.
317 - Flow setups are now processed in a round-robin manner across ports
318 to prevent any single client from monopolizing the CPU and conducting
319 a denial of service attack.
320 - Added support for native VLAN tagging. A new "vlan_mode"
321 parameter can be set for "port". Possible values: "access",
322 "trunk", "native-tagged" and "native-untagged".
323 - test-openflowd has been removed. Please use ovs-vswitchd instead.
326 ------------------------
327 - New "ofproto" abstraction layer to ease porting to hardware
329 - Packaging for Red Hat Enterprise Linux 5.6 and 6.0.
330 - Datapath support for Linux kernels up to 3.0.
332 - New "bundle" and "bundle_load" action extensions.
334 - Implement table unique constraints.
335 - Support cooperative locking between callers.
337 - New "-s" option for "show" command prints packet and byte
338 counters for each port.
340 - New "--readd" option for "replace-flows".
342 - New "show" command to print an overview of configuration.
343 - New "comment" command to add remark that explains intentions.
344 - ovs-brcompatd has been rewritten to fix long-standing bugs.
345 - ovs-openflowd has been renamed test-openflowd and moved into the
346 tests directory. Its presence confused too many users. Please
347 use ovs-vswitchd instead.
348 - New ovs-benchmark utility to test flow setup performance.
349 - A new log level "off" has been added. Configuring a log facility
350 "off" prevents any messages from being logged to it. Previously,
351 "emer" was effectively "off" because no messages were ever logged at
352 level "emer". Now, errors that cause a process to exit are logged
354 - "configure" option --with-l26 has been renamed --with-linux, and
355 --with-l26-source has been renamed --with-linux-source. The old
356 names will be removed after the next release, so please update
358 - The "-2.6" suffix has been dropped from the datapath/linux-2.6 and
359 datapath/linux-2.6/compat-2.6 directories.
361 - Dropped support for "tun_id_from_cookie" OpenFlow extension.
362 Please use the extensible match extensions instead.
363 - Removed the Maintenance_Point and Monitor tables in an effort
364 to simplify 802.1ag configuration.
365 - Performance and scalability improvements
369 ------------------------
370 - Ability to define policies over IPv6
373 - Support for extensible match extensions to OpenFlow
375 - Support for HFSC qdisc.
376 - Queue used by in-band control can now be configured.
378 - Kernel<->userspace interface has been reworked and should be
379 close to a stable ABI now.
380 - "Port group" concept has been dropped.
381 - GRE over IPSEC tunnels
383 - New active backup bonding mode.
384 - New L4 hashing support when LACP is enabled.
385 - Source MAC hash now includes VLAN field also.
387 - Greatly improved handling of large flow tables
389 - "show" command now prints full vport configuration.
390 - "dump-groups" command removed since kernel support for
391 port groups was dropped.
393 - New commands for working with the new Managers table.
394 - "list" command enhanced with new formatting options and --columns
396 - "get" command now accepts new --id option.
397 - New "find" command.
399 - New "queue-stats" command for printing queue stats.
400 - New commands "replace-flows" and "diff-flows".
401 - Commands to add and remove flows can now read from files.
402 - New --flow-format option to enable or disable NXM.
403 - New --more option to increase OpenFlow message verbosity.
404 - Removed "tun-cookie" command, which is no longer useful.
405 - ovs-controller enhancements for testing various features.
406 - New ovs-vlan-test command for testing for Linux kernel driver VLAN
407 bugs. New ovs-vlan-bug-workaround command for enabling and
408 disabling a workaround for these driver bugs.
410 - "Resubmit" actions now update flow statistics.
411 - New "register" extension for use in matching and actions, via NXM.
412 - New "multipath" experimental action extension.
413 - New support for matching multicast Ethernet frames, via NXM.
414 - New extension for OpenFlow vendor error codes.
415 - New extension to set the QoS output queue without actually
416 sending to an output port.
417 - Open vSwitch now reports a single flow table, instead of
418 separate hash and wildcard tables. This better models the
419 current implementation.
420 - New experimental "note" action.
421 - New "ofproto/trace" ovs-appctl command and associated utilities
422 to ease debugging complex flow tables.
424 - Schema documentation now includes an entity-relationship diagram.
425 - The database is now garbage collected. In most tables,
426 unreferenced rows will be deleted automatically.
427 - Many tables now include statistics updated periodically by
428 ovs-vswitchd or ovsdb-server.
429 - Every table now has an "external-ids" column for use by OVS
431 - There is no default controller anymore. Each bridge must have its
432 controller individually specified.
433 - The "fail-mode" is now a property of a Bridge instead of a Controller.
434 - New versioning and checksum features.
435 - New Managers table and manager_options column in Open_vSwitch table
436 for specifying managers. The old "managers" column in the
437 Open_vSwitch table has been removed.
438 - Many "name" columns are now immutable.
440 - Dropped support for XenServer pre-5.6.100.
441 - Dropped support for Linux pre-2.6.18.
442 - Dropped controller discovery support.
443 - Dropped "ovs-ofctl status" and the OpenFlow extension that it used.
444 Statistics reporting in the database is a rough equivalent.
445 - Dropped the "corekeeper" package (now separate, at
446 http://openvswitch.org/cgi-bin/gitweb.cgi?p=corekeeper).
447 - Performance and scalability improvements
450 v1.1.0pre2 - 13 Sep 2010
451 ------------------------
454 v1.1.0pre1 - 31 Aug 2010
455 ------------------------
456 - OpenFlow 1.0 slicing (QoS) functionality
457 - Python bindings for configuration database (no write support)
458 - Performance and scalability improvements
463 - New "patch" interface type
468 - Configuration database with remote management
471 - Support for XenServer 5.5 and 5.6
472 - Performance and scalability improvements
475 v0.99.2 - 18 Feb 2010
476 ---------------------
479 v0.99.1 - 25 Jan 2010
480 ---------------------
481 - Add support for sFlow(R)
482 - Make headers compatible with C++
485 v0.99.0 - 14 Jan 2010
486 ---------------------
487 - User-space forwarding engine
490 v0.90.7 - 29 Nov 2009
491 ---------------------
492 - Add support for NetFlow active timeouts
499 v0.90.5 - 21 Sep 2009
500 ---------------------
501 - Generalize in-band control to more diverse network setups