7 - The tunneling code no longer assumes input and output keys are symmetric.
8 If they are not, PMTUD needs to be disabled for tunneling to work. Note
9 this only applies to flow-based keys.
10 - FreeBSD is now a supported platform, thanks to code contributions from
11 Gaetano Catalli, Ed Maste, and Giuseppe Lettieri.
12 - ovs-bugtool: New --ovs option to report only OVS related information.
13 - New %t and %T log escapes to identify the subprogram within a
14 cooperating group of processes or threads that emitted a log message.
15 The default log patterns now include this information.
17 - Allow bitwise masking for SHA and THA fields in ARP, SLL and TLL
18 fields in IPv6 neighbor discovery messages, and IPv6 flow label.
19 - Adds support for writing to the metadata field for a flow.
20 - It is possible to request the OpenFlow port number with the
21 "ofport_request" column in the Interface table.
23 - Commands and actions that accept port numbers now also accept keywords
24 that represent those ports (such as LOCAL, NONE, and ALL). This is
25 also the recommended way to specify these ports, for compatibility
26 with OpenFlow 1.1 and later (which use the OpenFlow 1.0 numbers
27 for these ports for different purposes).
29 - Support requesting the port number with the "port_no" option in
31 - ovs-pki: The "online PKI" features have been removed, along with
32 the ovs-pki-cgi program that facilitated it, because of some
33 alarmist insecurity claims. We do not believe that these claims
34 are true, but because we do not know of any users for this
35 feature it seems better on balance to remove it. (The ovs-pki-cgi
36 program was not included in distribution packaging.)
37 - Tunnel Path MTU Discovery default value was set to 'disabled'. This
38 feature is deprecated and will be removed soon.
39 - ovsdb-server now enforces the immutability of immutable columns. This
40 was not enforced in earlier versions due to an oversight.
41 - New support for a nonstandard form of GRE that supports a 64-bit key.
42 - The ofproto library is now responsible for assigning OpenFlow port
43 numbers. An ofproto implementation should assign them when
44 port_construct() is called.
45 - The following features are now deprecated. They will be removed no
46 earlier than February 2013. Please email dev@openvswitch.org with
49 - The autopath action.
50 - Interface type "null".
51 - Numeric values for reserved ports (see "ovs-ofctl" note above).
52 - Tunnel Path MTU Discovery.
56 ------------------------
57 - New FAQ. Please send updates and additions!
58 - Authors of controllers, please read the new section titled "Action
59 Reproduction" in DESIGN, which describes an Open vSwitch change in
60 behavior in corner cases that may affect some controllers.
62 - A new test utility that can create L3 tunnel between two Open
63 vSwitches and detect connectivity issues.
65 - New --sort and --rsort options for "dump-flows" command.
66 - "mod-port" command can now control all OpenFlow config flags.
68 - Allow general bitwise masking for IPv4 and IPv6 addresses in
69 IPv4, IPv6, and ARP packets. (Previously, only CIDR masks
71 - Allow support for arbitrary Ethernet masks. (Previously, only
72 the multicast bit in the destination address could be individually
74 - New field OXM_OF_METADATA, to align with OpenFlow 1.1.
75 - The OFPST_QUEUE request now reports an error if a specified port or
76 queue does not exist, or for requests for a specific queue on all
77 ports, if the specified queue does not exist on any port. (Previous
78 versions generally reported an empty set of results.)
79 - New "flow monitor" feature to allow controllers to be notified of
80 flow table changes as they happen.
81 - Additional protocols are not mirrored and dropped when forward-bpdu is
82 false. For a full list, see the ovs-vswitchd.conf.db man page.
83 - Open vSwitch now sends RARP packets in situations where it previously
84 sent a custom protocol, making it consistent with behavior of QEMU and
86 - All Open vSwitch programs and log files now show timestamps in UTC,
87 instead the local timezone, by default.
91 ------------------------
92 - kernel modules are renamed. openvswitch_mod.ko is now
93 openvswitch.ko and brcompat_mod.ko is now brcompat.ko.
94 - Increased the number of NXM registers to 8.
95 - Added ability to configure DSCP setting for manager and controller
96 connections. By default, these connections have a DSCP value of
97 Internetwork Control (0xc0).
98 - Added the granular link health statistics, 'cfm_health', to an
101 - Added support to mask nd_target for ICMPv6 neighbor discovery flows.
102 - Added support for OpenFlow 1.3 port description (OFPMP_PORT_DESC)
105 - Added the "dump-ports-desc" command to retrieve port
106 information using the new port description multipart messages.
108 - Added support for spawning ovs-test server from the client.
109 - Now ovs-test is able to automatically create test bridges and ports.
110 - "ovs-dpctl dump-flows" now prints observed TCP flags in TCP flows.
111 - Tripled flow setup performance.
112 - The "coverage/log" command previously available through ovs-appctl
113 has been replaced by "coverage/show". The new command replies with
114 coverage counter values, instead of logging them.
118 ------------------------
119 - Allow OFPP_CONTROLLER as the in_port for packet-out messages.
123 ------------------------
124 *** Internal only release ***
126 - LACP bonds no longer fall back to balance-slb when negotiations fail.
127 Instead they drop traffic.
128 - The default bond_mode changed from SLB to active-backup, to protect
129 unsuspecting users from the significant risks of SLB bonds (which are
130 documented in vswitchd/INTERNALS).
131 - Load balancing can be disabled by setting the bond-rebalance-interval
134 - Added support for bitwise matching on TCP and UDP ports.
135 See ovs-ofctl(8) for more information.
136 - NXM flow dumps now include times elapsed toward idle and hard
138 - Added an OpenFlow extension NXT_SET_ASYNC_CONFIG that allows
139 controllers more precise control over which OpenFlow messages they
140 receive asynchronously.
141 - New "fin_timeout" action.
142 - Added "fin_timeout" support to "learn" action.
143 - New Nicira action NXAST_CONTROLLER that offers additional features
144 over output to OFPP_CONTROLLER.
145 - When QoS settings for an interface do not configure a default queue
146 (queue 0), Open vSwitch now uses a default configuration for that
147 queue, instead of dropping all packets as in previous versions.
149 - Logging to console and file will have UTC timestamp as a default for
150 all the daemons. An example of the default format is
151 2012-01-27T16:35:17Z. ovs-appctl can be used to change the default
153 - The syntax of commands and options to set log levels was simplified,
154 to make it easier to remember.
155 - New support for limiting the number of flows in an OpenFlow flow
156 table, with configurable policy for evicting flows upon
157 overflow. See the Flow_Table table in ovs-vswitch.conf.db(5)
158 for more information.
159 - New "enable-async-messages" column in the Controller table. If set to
160 false, OpenFlow connections to the controller will initially have all
161 asynchronous messages disabled, overriding normal OpenFlow behavior.
162 - ofproto-provider interface:
163 - "struct rule" has a new member "used" that ofproto implementations
164 should maintain by updating with ofproto_rule_update_used().
166 - The new option --timestamp causes the "monitor" command to print
167 a timestamp with every update.
168 - CFM module CCM broadcasts can now be tagged with an 802.1p priority.
172 ------------------------
174 - Added support for querying, modifying, and deleting flows
175 based on flow cookie when using NXM.
176 - Added new NXM_PACKET_IN format.
177 - Added new NXAST_DEC_TTL action.
179 - Added daemonization support to the monitor and snoop commands.
181 - The "find" command supports new set relational operators
182 {=}, {!=}, {<}, {>}, {<=}, and {>=}.
183 - ovsdb-tool now uses the typical database and schema installation
184 directories as defaults.
185 - The default MAC learning timeout has been increased from 60 seconds
186 to 300 seconds. The MAC learning timeout is now configurable.
190 ------------------------
191 - Compatible with Open vSwitch kernel module included in Linux 3.3.
192 - New "VLAN splinters" feature to work around buggy device drivers
193 in old Linux versions. (This feature is deprecated. When
194 broken device drivers are no longer in widespread use, we will
195 delete this feature.) See ovs-vswitchd.conf.db(5) for more
198 - Added ability to match on IPv6 flow label through NXM.
199 - Added ability to match on ECN bits in IPv4 and IPv6 through NXM.
200 - Added ability to match on TTL in IPv4 and IPv6 through NXM.
201 - Added ability to modify ECN bits in IPv4.
202 - Added ability to modify TTL in IPv4.
204 - Don't require the "normal" action to use mirrors. Traffic will
205 now be properly mirrored for any flows, regardless of their
207 - Track packet and byte statistics sent on mirrors.
208 - The sFlow implementation can now usually infer the correct agent
209 device instead of having to be told explicitly.
211 - New "fdb/flush" command to flush bridge's MAC learning table.
213 - A new distributed testing tool that allows one to diagnose performance
214 and connectivity issues. This tool currently is not included in RH or
216 - RHEL packaging now supports integration with Red Hat network scripts.
218 - Post 1.4.*, OVS will be changing the default bond mode from balance-slb
219 to active-backup. SLB bonds carry significant risks with them
220 (documented vswitchd/INTERNALS) which we want to prevent unsuspecting
221 users from running into. Users are advised to update any scripts or
222 configuration which may be negatively impacted by explicitly setting
223 the bond mode which they want to use.
227 ------------------------
229 - Added an OpenFlow extension which allows the "output" action to accept
231 - Added an OpenFlow extension for flexible learning.
232 - Bumped number of NXM registers from four to five.
234 - New "version" command to determine version of running daemon.
235 - If no argument is provided for "cfm/show", displays detailed
236 information about all interfaces with CFM enabled.
237 - If no argument is provided for "lacp/show", displays detailed
238 information about all ports with LACP enabled.
240 - New "set-if" command to modify a datapath port's configuration.
242 - The software switch now supports 255 OpenFlow tables, instead
243 of just one. By default, only table 0 is consulted, but the
244 new NXAST_RESUBMIT_TABLE action can look up in additional
245 tables. Tables 128 and above are reserved for use by the
246 switch itself; please use only tables 0 through 127.
247 - Add support for 802.1D spanning tree (STP).
248 - Fragment handling extensions:
249 - New OFPC_FRAG_NX_MATCH fragment handling mode, in which L4
250 fields are made available for matching in fragments with
252 - New NXM_NX_IP_FRAG match field for matching IP fragments (usable
253 via "ip_frag" in ovs-ofctl).
254 - New ovs-ofctl "get-frags" and "set-frags" commands to get and set
255 fragment handling policy.
256 - CAPWAP tunneling now supports an extension to transport a 64-bit key.
257 By default it remains compatible with the old version and other
258 standards-based implementations.
259 - Flow setups are now processed in a round-robin manner across ports
260 to prevent any single client from monopolizing the CPU and conducting
261 a denial of service attack.
262 - Added support for native VLAN tagging. A new "vlan_mode"
263 parameter can be set for "port". Possible values: "access",
264 "trunk", "native-tagged" and "native-untagged".
265 - test-openflowd has been removed. Please use ovs-vswitchd instead.
268 ------------------------
269 - New "ofproto" abstraction layer to ease porting to hardware
271 - Packaging for Red Hat Enterprise Linux 5.6 and 6.0.
272 - Datapath support for Linux kernels up to 3.0.
274 - New "bundle" and "bundle_load" action extensions.
276 - Implement table unique constraints.
277 - Support cooperative locking between callers.
279 - New "-s" option for "show" command prints packet and byte
280 counters for each port.
282 - New "--readd" option for "replace-flows".
284 - New "show" command to print an overview of configuration.
285 - New "comment" command to add remark that explains intentions.
286 - ovs-brcompatd has been rewritten to fix long-standing bugs.
287 - ovs-openflowd has been renamed test-openflowd and moved into the
288 tests directory. Its presence confused too many users. Please
289 use ovs-vswitchd instead.
290 - New ovs-benchmark utility to test flow setup performance.
291 - A new log level "off" has been added. Configuring a log facility
292 "off" prevents any messages from being logged to it. Previously,
293 "emer" was effectively "off" because no messages were ever logged at
294 level "emer". Now, errors that cause a process to exit are logged
296 - "configure" option --with-l26 has been renamed --with-linux, and
297 --with-l26-source has been renamed --with-linux-source. The old
298 names will be removed after the next release, so please update
300 - The "-2.6" suffix has been dropped from the datapath/linux-2.6 and
301 datapath/linux-2.6/compat-2.6 directories.
303 - Dropped support for "tun_id_from_cookie" OpenFlow extension.
304 Please use the extensible match extensions instead.
305 - Removed the Maintenance_Point and Monitor tables in an effort
306 to simplify 802.1ag configuration.
307 - Performance and scalability improvements
311 ------------------------
312 - Ability to define policies over IPv6
315 - Support for extensible match extensions to OpenFlow
317 - Support for HFSC qdisc.
318 - Queue used by in-band control can now be configured.
320 - Kernel<->userspace interface has been reworked and should be
321 close to a stable ABI now.
322 - "Port group" concept has been dropped.
323 - GRE over IPSEC tunnels
325 - New active backup bonding mode.
326 - New L4 hashing support when LACP is enabled.
327 - Source MAC hash now includes VLAN field also.
329 - Greatly improved handling of large flow tables
331 - "show" command now prints full vport configuration.
332 - "dump-groups" command removed since kernel support for
333 port groups was dropped.
335 - New commands for working with the new Managers table.
336 - "list" command enhanced with new formatting options and --columns
338 - "get" command now accepts new --id option.
339 - New "find" command.
341 - New "queue-stats" command for printing queue stats.
342 - New commands "replace-flows" and "diff-flows".
343 - Commands to add and remove flows can now read from files.
344 - New --flow-format option to enable or disable NXM.
345 - New --more option to increase OpenFlow message verbosity.
346 - Removed "tun-cookie" command, which is no longer useful.
347 - ovs-controller enhancements for testing various features.
348 - New ovs-vlan-test command for testing for Linux kernel driver VLAN
349 bugs. New ovs-vlan-bug-workaround command for enabling and
350 disabling a workaround for these driver bugs.
352 - "Resubmit" actions now update flow statistics.
353 - New "register" extension for use in matching and actions, via NXM.
354 - New "multipath" experimental action extension.
355 - New support for matching multicast Ethernet frames, via NXM.
356 - New extension for OpenFlow vendor error codes.
357 - New extension to set the QoS output queue without actually
358 sending to an output port.
359 - Open vSwitch now reports a single flow table, instead of
360 separate hash and wildcard tables. This better models the
361 current implementation.
362 - New experimental "note" action.
363 - New "ofproto/trace" ovs-appctl command and associated utilities
364 to ease debugging complex flow tables.
366 - Schema documentation now includes an entity-relationship diagram.
367 - The database is now garbage collected. In most tables,
368 unreferenced rows will be deleted automatically.
369 - Many tables now include statistics updated periodically by
370 ovs-vswitchd or ovsdb-server.
371 - Every table now has an "external-ids" column for use by OVS
373 - There is no default controller anymore. Each bridge must have its
374 controller individually specified.
375 - The "fail-mode" is now a property of a Bridge instead of a Controller.
376 - New versioning and checksum features.
377 - New Managers table and manager_options column in Open_vSwitch table
378 for specifying managers. The old "managers" column in the
379 Open_vSwitch table has been removed.
380 - Many "name" columns are now immutable.
382 - Dropped support for XenServer pre-5.6.100.
383 - Dropped support for Linux pre-2.6.18.
384 - Dropped controller discovery support.
385 - Dropped "ovs-ofctl status" and the OpenFlow extension that it used.
386 Statistics reporting in the database is a rough equivalent.
387 - Dropped the "corekeeper" package (now separate, at
388 http://openvswitch.org/cgi-bin/gitweb.cgi?p=corekeeper).
389 - Performance and scalability improvements
392 v1.1.0pre2 - 13 Sep 2010
393 ------------------------
396 v1.1.0pre1 - 31 Aug 2010
397 ------------------------
398 - OpenFlow 1.0 slicing (QoS) functionality
399 - Python bindings for configuration database (no write support)
400 - Performance and scalability improvements
405 - New "patch" interface type
410 - Configuration database with remote management
413 - Support for XenServer 5.5 and 5.6
414 - Performance and scalability improvements
417 v0.99.2 - 18 Feb 2010
418 ---------------------
421 v0.99.1 - 25 Jan 2010
422 ---------------------
423 - Add support for sFlow(R)
424 - Make headers compatible with C++
427 v0.99.0 - 14 Jan 2010
428 ---------------------
429 - User-space forwarding engine
432 v0.90.7 - 29 Nov 2009
433 ---------------------
434 - Add support for NetFlow active timeouts
441 v0.90.5 - 21 Sep 2009
442 ---------------------
443 - Generalize in-band control to more diverse network setups