3 - The maximum size of the MAC learning table is now configurable.
4 - New support for the VXLAN tunnel protocol (see the IETF draft here:
5 http://tools.ietf.org/html/draft-mahalingam-dutt-dcops-vxlan-02).
6 - With the Linux datapath, packets for new flows are now queued
7 separately on a per-port basis, so it should no longer be
8 possible for a large number of new flows arriving on one port to
9 prevent new flows from being processed on other ports.
10 - New "vlog/disable-rate-limit" and "vlog/enable-rate-limit" commands
11 available through ovs-appctl allow control over logging rate limits.
12 - The OpenFlow "dp_desc" may now be configured by setting the value of
13 other-config:dp-desc in the Bridge table.
14 - Path MTU discovery is no longer supported.
15 - Backward-incompatible changes:
16 - Earlier Open vSwitch versions treated ANY as a wildcard in flow
17 syntax. OpenFlow 1.1 adds a port named ANY, which introduces a
18 conflict. ANY was rarely used in flow syntax, so we chose to
19 retire that meaning of ANY in favor of the OpenFlow 1.1 meaning.
24 - The tunneling code no longer assumes input and output keys are symmetric.
25 If they are not, PMTUD needs to be disabled for tunneling to work. Note
26 this only applies to flow-based keys.
28 - Support for ipv6 set action.
29 - SKB mark matching and setting.
30 - support for Linux kernels up to 3.7
31 - FreeBSD is now a supported platform, thanks to code contributions from
32 Gaetano Catalli, Ed Maste, and Giuseppe Lettieri.
33 - ovs-bugtool: New --ovs option to report only OVS related information.
34 - New %t and %T log escapes to identify the subprogram within a
35 cooperating group of processes or threads that emitted a log message.
36 The default log patterns now include this information.
38 - Allow bitwise masking for SHA and THA fields in ARP, SLL and TLL
39 fields in IPv6 neighbor discovery messages, and IPv6 flow label.
40 - Adds support for writing to the metadata field for a flow.
41 - It is possible to request the OpenFlow port number with the
42 "ofport_request" column in the Interface table.
44 - Commands and actions that accept port numbers now also accept keywords
45 that represent those ports (such as LOCAL, NONE, and ALL). This is
46 also the recommended way to specify these ports, for compatibility
47 with OpenFlow 1.1 and later (which use the OpenFlow 1.0 numbers
48 for these ports for different purposes).
50 - Support requesting the port number with the "port_no" option in
52 - The "dump-flows" and "del-flows" no longer require an argument
53 if only one datapath exists.
55 - New "dpif/dump-dps", "dpif/show", and "dpif/dump-flows" command
56 that mimic the equivalent ovs-dpctl commands.
57 - ovs-pki: The "online PKI" features have been removed, along with
58 the ovs-pki-cgi program that facilitated it, because of some
59 alarmist insecurity claims. We do not believe that these claims
60 are true, but because we do not know of any users for this
61 feature it seems better on balance to remove it. (The ovs-pki-cgi
62 program was not included in distribution packaging.)
63 - Tunnel Path MTU Discovery default value was set to 'disabled'. This
64 feature is deprecated and will be removed soon.
65 - ovsdb-server now enforces the immutability of immutable columns. This
66 was not enforced in earlier versions due to an oversight.
67 - New support for a nonstandard form of GRE that supports a 64-bit key.
68 - The ofproto library is now responsible for assigning OpenFlow port
69 numbers. An ofproto implementation should assign them when
70 port_construct() is called.
71 - All dpif-based bridges of a particular type share a common
72 datapath called "ovs-<type>", e.g. "ovs-system". The ovs-dpctl
73 commands will now return information on that shared datapath. To
74 get the equivalent bridge-specific information, use the new
75 "ovs-appctl dpif/*" commands.
76 - Tunnel header caching removed.
77 - The following features are now deprecated. They will be removed no
78 earlier than February 2013. Please email dev@openvswitch.org with
80 - Bridge compatibility.
82 - The autopath action.
83 - Interface type "null".
84 - Numeric values for reserved ports (see "ovs-ofctl" note above).
85 - Tunnel Path MTU Discovery.
86 - CAPWAP tunnel support.
87 - The data in the RARP packets can now be matched in the same way as the
92 ------------------------
93 - New FAQ. Please send updates and additions!
94 - Authors of controllers, please read the new section titled "Action
95 Reproduction" in DESIGN, which describes an Open vSwitch change in
96 behavior in corner cases that may affect some controllers.
98 - A new test utility that can create L3 tunnel between two Open
99 vSwitches and detect connectivity issues.
101 - New --sort and --rsort options for "dump-flows" command.
102 - "mod-port" command can now control all OpenFlow config flags.
104 - Allow general bitwise masking for IPv4 and IPv6 addresses in
105 IPv4, IPv6, and ARP packets. (Previously, only CIDR masks
107 - Allow support for arbitrary Ethernet masks. (Previously, only
108 the multicast bit in the destination address could be individually
110 - New field OXM_OF_METADATA, to align with OpenFlow 1.1.
111 - The OFPST_QUEUE request now reports an error if a specified port or
112 queue does not exist, or for requests for a specific queue on all
113 ports, if the specified queue does not exist on any port. (Previous
114 versions generally reported an empty set of results.)
115 - New "flow monitor" feature to allow controllers to be notified of
116 flow table changes as they happen.
117 - Additional protocols are not mirrored and dropped when forward-bpdu is
118 false. For a full list, see the ovs-vswitchd.conf.db man page.
119 - Open vSwitch now sends RARP packets in situations where it previously
120 sent a custom protocol, making it consistent with behavior of QEMU and
122 - All Open vSwitch programs and log files now show timestamps in UTC,
123 instead the local timezone, by default.
127 ------------------------
128 - kernel modules are renamed. openvswitch_mod.ko is now
129 openvswitch.ko and brcompat_mod.ko is now brcompat.ko.
130 - Increased the number of NXM registers to 8.
131 - Added ability to configure DSCP setting for manager and controller
132 connections. By default, these connections have a DSCP value of
133 Internetwork Control (0xc0).
134 - Added the granular link health statistics, 'cfm_health', to an
137 - Added support to mask nd_target for ICMPv6 neighbor discovery flows.
138 - Added support for OpenFlow 1.3 port description (OFPMP_PORT_DESC)
141 - Added the "dump-ports-desc" command to retrieve port
142 information using the new port description multipart messages.
144 - Added support for spawning ovs-test server from the client.
145 - Now ovs-test is able to automatically create test bridges and ports.
146 - "ovs-dpctl dump-flows" now prints observed TCP flags in TCP flows.
147 - Tripled flow setup performance.
148 - The "coverage/log" command previously available through ovs-appctl
149 has been replaced by "coverage/show". The new command replies with
150 coverage counter values, instead of logging them.
154 ------------------------
155 - Allow OFPP_CONTROLLER as the in_port for packet-out messages.
159 ------------------------
160 *** Internal only release ***
162 - LACP bonds no longer fall back to balance-slb when negotiations fail.
163 Instead they drop traffic.
164 - The default bond_mode changed from SLB to active-backup, to protect
165 unsuspecting users from the significant risks of SLB bonds (which are
166 documented in vswitchd/INTERNALS).
167 - Load balancing can be disabled by setting the bond-rebalance-interval
170 - Added support for bitwise matching on TCP and UDP ports.
171 See ovs-ofctl(8) for more information.
172 - NXM flow dumps now include times elapsed toward idle and hard
174 - Added an OpenFlow extension NXT_SET_ASYNC_CONFIG that allows
175 controllers more precise control over which OpenFlow messages they
176 receive asynchronously.
177 - New "fin_timeout" action.
178 - Added "fin_timeout" support to "learn" action.
179 - New Nicira action NXAST_CONTROLLER that offers additional features
180 over output to OFPP_CONTROLLER.
181 - When QoS settings for an interface do not configure a default queue
182 (queue 0), Open vSwitch now uses a default configuration for that
183 queue, instead of dropping all packets as in previous versions.
185 - Logging to console and file will have UTC timestamp as a default for
186 all the daemons. An example of the default format is
187 2012-01-27T16:35:17Z. ovs-appctl can be used to change the default
189 - The syntax of commands and options to set log levels was simplified,
190 to make it easier to remember.
191 - New support for limiting the number of flows in an OpenFlow flow
192 table, with configurable policy for evicting flows upon
193 overflow. See the Flow_Table table in ovs-vswitch.conf.db(5)
194 for more information.
195 - New "enable-async-messages" column in the Controller table. If set to
196 false, OpenFlow connections to the controller will initially have all
197 asynchronous messages disabled, overriding normal OpenFlow behavior.
198 - ofproto-provider interface:
199 - "struct rule" has a new member "used" that ofproto implementations
200 should maintain by updating with ofproto_rule_update_used().
202 - The new option --timestamp causes the "monitor" command to print
203 a timestamp with every update.
204 - CFM module CCM broadcasts can now be tagged with an 802.1p priority.
208 ------------------------
210 - Added support for querying, modifying, and deleting flows
211 based on flow cookie when using NXM.
212 - Added new NXM_PACKET_IN format.
213 - Added new NXAST_DEC_TTL action.
215 - Added daemonization support to the monitor and snoop commands.
217 - The "find" command supports new set relational operators
218 {=}, {!=}, {<}, {>}, {<=}, and {>=}.
219 - ovsdb-tool now uses the typical database and schema installation
220 directories as defaults.
221 - The default MAC learning timeout has been increased from 60 seconds
222 to 300 seconds. The MAC learning timeout is now configurable.
226 ------------------------
227 - Compatible with Open vSwitch kernel module included in Linux 3.3.
228 - New "VLAN splinters" feature to work around buggy device drivers
229 in old Linux versions. (This feature is deprecated. When
230 broken device drivers are no longer in widespread use, we will
231 delete this feature.) See ovs-vswitchd.conf.db(5) for more
234 - Added ability to match on IPv6 flow label through NXM.
235 - Added ability to match on ECN bits in IPv4 and IPv6 through NXM.
236 - Added ability to match on TTL in IPv4 and IPv6 through NXM.
237 - Added ability to modify ECN bits in IPv4.
238 - Added ability to modify TTL in IPv4.
240 - Don't require the "normal" action to use mirrors. Traffic will
241 now be properly mirrored for any flows, regardless of their
243 - Track packet and byte statistics sent on mirrors.
244 - The sFlow implementation can now usually infer the correct agent
245 device instead of having to be told explicitly.
247 - New "fdb/flush" command to flush bridge's MAC learning table.
249 - A new distributed testing tool that allows one to diagnose performance
250 and connectivity issues. This tool currently is not included in RH or
252 - RHEL packaging now supports integration with Red Hat network scripts.
254 - Post 1.4.*, OVS will be changing the default bond mode from balance-slb
255 to active-backup. SLB bonds carry significant risks with them
256 (documented vswitchd/INTERNALS) which we want to prevent unsuspecting
257 users from running into. Users are advised to update any scripts or
258 configuration which may be negatively impacted by explicitly setting
259 the bond mode which they want to use.
263 ------------------------
265 - Added an OpenFlow extension which allows the "output" action to accept
267 - Added an OpenFlow extension for flexible learning.
268 - Bumped number of NXM registers from four to five.
270 - New "version" command to determine version of running daemon.
271 - If no argument is provided for "cfm/show", displays detailed
272 information about all interfaces with CFM enabled.
273 - If no argument is provided for "lacp/show", displays detailed
274 information about all ports with LACP enabled.
276 - New "set-if" command to modify a datapath port's configuration.
278 - The software switch now supports 255 OpenFlow tables, instead
279 of just one. By default, only table 0 is consulted, but the
280 new NXAST_RESUBMIT_TABLE action can look up in additional
281 tables. Tables 128 and above are reserved for use by the
282 switch itself; please use only tables 0 through 127.
283 - Add support for 802.1D spanning tree (STP).
284 - Fragment handling extensions:
285 - New OFPC_FRAG_NX_MATCH fragment handling mode, in which L4
286 fields are made available for matching in fragments with
288 - New NXM_NX_IP_FRAG match field for matching IP fragments (usable
289 via "ip_frag" in ovs-ofctl).
290 - New ovs-ofctl "get-frags" and "set-frags" commands to get and set
291 fragment handling policy.
292 - CAPWAP tunneling now supports an extension to transport a 64-bit key.
293 By default it remains compatible with the old version and other
294 standards-based implementations.
295 - Flow setups are now processed in a round-robin manner across ports
296 to prevent any single client from monopolizing the CPU and conducting
297 a denial of service attack.
298 - Added support for native VLAN tagging. A new "vlan_mode"
299 parameter can be set for "port". Possible values: "access",
300 "trunk", "native-tagged" and "native-untagged".
301 - test-openflowd has been removed. Please use ovs-vswitchd instead.
304 ------------------------
305 - New "ofproto" abstraction layer to ease porting to hardware
307 - Packaging for Red Hat Enterprise Linux 5.6 and 6.0.
308 - Datapath support for Linux kernels up to 3.0.
310 - New "bundle" and "bundle_load" action extensions.
312 - Implement table unique constraints.
313 - Support cooperative locking between callers.
315 - New "-s" option for "show" command prints packet and byte
316 counters for each port.
318 - New "--readd" option for "replace-flows".
320 - New "show" command to print an overview of configuration.
321 - New "comment" command to add remark that explains intentions.
322 - ovs-brcompatd has been rewritten to fix long-standing bugs.
323 - ovs-openflowd has been renamed test-openflowd and moved into the
324 tests directory. Its presence confused too many users. Please
325 use ovs-vswitchd instead.
326 - New ovs-benchmark utility to test flow setup performance.
327 - A new log level "off" has been added. Configuring a log facility
328 "off" prevents any messages from being logged to it. Previously,
329 "emer" was effectively "off" because no messages were ever logged at
330 level "emer". Now, errors that cause a process to exit are logged
332 - "configure" option --with-l26 has been renamed --with-linux, and
333 --with-l26-source has been renamed --with-linux-source. The old
334 names will be removed after the next release, so please update
336 - The "-2.6" suffix has been dropped from the datapath/linux-2.6 and
337 datapath/linux-2.6/compat-2.6 directories.
339 - Dropped support for "tun_id_from_cookie" OpenFlow extension.
340 Please use the extensible match extensions instead.
341 - Removed the Maintenance_Point and Monitor tables in an effort
342 to simplify 802.1ag configuration.
343 - Performance and scalability improvements
347 ------------------------
348 - Ability to define policies over IPv6
351 - Support for extensible match extensions to OpenFlow
353 - Support for HFSC qdisc.
354 - Queue used by in-band control can now be configured.
356 - Kernel<->userspace interface has been reworked and should be
357 close to a stable ABI now.
358 - "Port group" concept has been dropped.
359 - GRE over IPSEC tunnels
361 - New active backup bonding mode.
362 - New L4 hashing support when LACP is enabled.
363 - Source MAC hash now includes VLAN field also.
365 - Greatly improved handling of large flow tables
367 - "show" command now prints full vport configuration.
368 - "dump-groups" command removed since kernel support for
369 port groups was dropped.
371 - New commands for working with the new Managers table.
372 - "list" command enhanced with new formatting options and --columns
374 - "get" command now accepts new --id option.
375 - New "find" command.
377 - New "queue-stats" command for printing queue stats.
378 - New commands "replace-flows" and "diff-flows".
379 - Commands to add and remove flows can now read from files.
380 - New --flow-format option to enable or disable NXM.
381 - New --more option to increase OpenFlow message verbosity.
382 - Removed "tun-cookie" command, which is no longer useful.
383 - ovs-controller enhancements for testing various features.
384 - New ovs-vlan-test command for testing for Linux kernel driver VLAN
385 bugs. New ovs-vlan-bug-workaround command for enabling and
386 disabling a workaround for these driver bugs.
388 - "Resubmit" actions now update flow statistics.
389 - New "register" extension for use in matching and actions, via NXM.
390 - New "multipath" experimental action extension.
391 - New support for matching multicast Ethernet frames, via NXM.
392 - New extension for OpenFlow vendor error codes.
393 - New extension to set the QoS output queue without actually
394 sending to an output port.
395 - Open vSwitch now reports a single flow table, instead of
396 separate hash and wildcard tables. This better models the
397 current implementation.
398 - New experimental "note" action.
399 - New "ofproto/trace" ovs-appctl command and associated utilities
400 to ease debugging complex flow tables.
402 - Schema documentation now includes an entity-relationship diagram.
403 - The database is now garbage collected. In most tables,
404 unreferenced rows will be deleted automatically.
405 - Many tables now include statistics updated periodically by
406 ovs-vswitchd or ovsdb-server.
407 - Every table now has an "external-ids" column for use by OVS
409 - There is no default controller anymore. Each bridge must have its
410 controller individually specified.
411 - The "fail-mode" is now a property of a Bridge instead of a Controller.
412 - New versioning and checksum features.
413 - New Managers table and manager_options column in Open_vSwitch table
414 for specifying managers. The old "managers" column in the
415 Open_vSwitch table has been removed.
416 - Many "name" columns are now immutable.
418 - Dropped support for XenServer pre-5.6.100.
419 - Dropped support for Linux pre-2.6.18.
420 - Dropped controller discovery support.
421 - Dropped "ovs-ofctl status" and the OpenFlow extension that it used.
422 Statistics reporting in the database is a rough equivalent.
423 - Dropped the "corekeeper" package (now separate, at
424 http://openvswitch.org/cgi-bin/gitweb.cgi?p=corekeeper).
425 - Performance and scalability improvements
428 v1.1.0pre2 - 13 Sep 2010
429 ------------------------
432 v1.1.0pre1 - 31 Aug 2010
433 ------------------------
434 - OpenFlow 1.0 slicing (QoS) functionality
435 - Python bindings for configuration database (no write support)
436 - Performance and scalability improvements
441 - New "patch" interface type
446 - Configuration database with remote management
449 - Support for XenServer 5.5 and 5.6
450 - Performance and scalability improvements
453 v0.99.2 - 18 Feb 2010
454 ---------------------
457 v0.99.1 - 25 Jan 2010
458 ---------------------
459 - Add support for sFlow(R)
460 - Make headers compatible with C++
463 v0.99.0 - 14 Jan 2010
464 ---------------------
465 - User-space forwarding engine
468 v0.90.7 - 29 Nov 2009
469 ---------------------
470 - Add support for NetFlow active timeouts
477 v0.90.5 - 21 Sep 2009
478 ---------------------
479 - Generalize in-band control to more diverse network setups