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.
21 - Commands and actions that accept port numbers now also accept keywords
22 that represent those ports (such as LOCAL, NONE, and ALL). This is
23 also the recommended way to specify these ports, for compatibility
24 with OpenFlow 1.1 and later (which use the OpenFlow 1.0 numbers
25 for these ports for different purposes).
27 - Support requesting the port number with the "port_no" option in
29 - ovs-pki: The "online PKI" features have been removed, along with
30 the ovs-pki-cgi program that facilitated it, because of some
31 alarmist insecurity claims. We do not believe that these claims
32 are true, but because we do not know of any users for this
33 feature it seems better on balance to remove it. (The ovs-pki-cgi
34 program was not included in distribution packaging.)
35 - Tunnel Path MTU Discovery default value was set to 'disabled'.
36 - ovsdb-server now enforces the immutability of immutable columns. This
37 was not enforced in earlier versions due to an oversight.
38 - New support for a nonstandard form of GRE that supports a 64-bit key.
39 - The following features are now deprecated. They will be removed no
40 earlier than February 2013. Please email dev@openvswitch.org with
43 - The autopath action.
44 - Interface type "null".
45 - Numeric values for reserved ports (see "ovs-ofctl" note above).
49 ------------------------
50 - New FAQ. Please send updates and additions!
51 - Authors of controllers, please read the new section titled "Action
52 Reproduction" in DESIGN, which describes an Open vSwitch change in
53 behavior in corner cases that may affect some controllers.
55 - A new test utility that can create L3 tunnel between two Open
56 vSwitches and detect connectivity issues.
58 - New --sort and --rsort options for "dump-flows" command.
59 - "mod-port" command can now control all OpenFlow config flags.
61 - Allow general bitwise masking for IPv4 and IPv6 addresses in
62 IPv4, IPv6, and ARP packets. (Previously, only CIDR masks
64 - Allow support for arbitrary Ethernet masks. (Previously, only
65 the multicast bit in the destination address could be individually
67 - New field OXM_OF_METADATA, to align with OpenFlow 1.1.
68 - The OFPST_QUEUE request now reports an error if a specified port or
69 queue does not exist, or for requests for a specific queue on all
70 ports, if the specified queue does not exist on any port. (Previous
71 versions generally reported an empty set of results.)
72 - New "flow monitor" feature to allow controllers to be notified of
73 flow table changes as they happen.
74 - Additional protocols are not mirrored and dropped when forward-bpdu is
75 false. For a full list, see the ovs-vswitchd.conf.db man page.
76 - Open vSwitch now sends RARP packets in situations where it previously
77 sent a custom protocol, making it consistent with behavior of QEMU and
79 - All Open vSwitch programs and log files now show timestamps in UTC,
80 instead the local timezone, by default.
84 ------------------------
85 - kernel modules are renamed. openvswitch_mod.ko is now
86 openvswitch.ko and brcompat_mod.ko is now brcompat.ko.
87 - Increased the number of NXM registers to 8.
88 - Added ability to configure DSCP setting for manager and controller
89 connections. By default, these connections have a DSCP value of
90 Internetwork Control (0xc0).
91 - Added the granular link health statistics, 'cfm_health', to an
94 - Added support to mask nd_target for ICMPv6 neighbor discovery flows.
95 - Added support for OpenFlow 1.3 port description (OFPMP_PORT_DESC)
98 - Added the "dump-ports-desc" command to retrieve port
99 information using the new port description multipart messages.
101 - Added support for spawning ovs-test server from the client.
102 - Now ovs-test is able to automatically create test bridges and ports.
103 - "ovs-dpctl dump-flows" now prints observed TCP flags in TCP flows.
104 - Tripled flow setup performance.
105 - The "coverage/log" command previously available through ovs-appctl
106 has been replaced by "coverage/show". The new command replies with
107 coverage counter values, instead of logging them.
111 ------------------------
112 - Allow OFPP_CONTROLLER as the in_port for packet-out messages.
116 ------------------------
117 *** Internal only release ***
119 - LACP bonds no longer fall back to balance-slb when negotiations fail.
120 Instead they drop traffic.
121 - The default bond_mode changed from SLB to active-backup, to protect
122 unsuspecting users from the significant risks of SLB bonds (which are
123 documented in vswitchd/INTERNALS).
124 - Load balancing can be disabled by setting the bond-rebalance-interval
127 - Added support for bitwise matching on TCP and UDP ports.
128 See ovs-ofctl(8) for more information.
129 - NXM flow dumps now include times elapsed toward idle and hard
131 - Added an OpenFlow extension NXT_SET_ASYNC_CONFIG that allows
132 controllers more precise control over which OpenFlow messages they
133 receive asynchronously.
134 - New "fin_timeout" action.
135 - Added "fin_timeout" support to "learn" action.
136 - New Nicira action NXAST_CONTROLLER that offers additional features
137 over output to OFPP_CONTROLLER.
138 - When QoS settings for an interface do not configure a default queue
139 (queue 0), Open vSwitch now uses a default configuration for that
140 queue, instead of dropping all packets as in previous versions.
142 - Logging to console and file will have UTC timestamp as a default for
143 all the daemons. An example of the default format is
144 2012-01-27T16:35:17Z. ovs-appctl can be used to change the default
146 - The syntax of commands and options to set log levels was simplified,
147 to make it easier to remember.
148 - New support for limiting the number of flows in an OpenFlow flow
149 table, with configurable policy for evicting flows upon
150 overflow. See the Flow_Table table in ovs-vswitch.conf.db(5)
151 for more information.
152 - New "enable-async-messages" column in the Controller table. If set to
153 false, OpenFlow connections to the controller will initially have all
154 asynchronous messages disabled, overriding normal OpenFlow behavior.
155 - ofproto-provider interface:
156 - "struct rule" has a new member "used" that ofproto implementations
157 should maintain by updating with ofproto_rule_update_used().
159 - The new option --timestamp causes the "monitor" command to print
160 a timestamp with every update.
161 - CFM module CCM broadcasts can now be tagged with an 802.1p priority.
165 ------------------------
167 - Added support for querying, modifying, and deleting flows
168 based on flow cookie when using NXM.
169 - Added new NXM_PACKET_IN format.
170 - Added new NXAST_DEC_TTL action.
172 - Added daemonization support to the monitor and snoop commands.
174 - The "find" command supports new set relational operators
175 {=}, {!=}, {<}, {>}, {<=}, and {>=}.
176 - ovsdb-tool now uses the typical database and schema installation
177 directories as defaults.
178 - The default MAC learning timeout has been increased from 60 seconds
179 to 300 seconds. The MAC learning timeout is now configurable.
183 ------------------------
184 - Compatible with Open vSwitch kernel module included in Linux 3.3.
185 - New "VLAN splinters" feature to work around buggy device drivers
186 in old Linux versions. (This feature is deprecated. When
187 broken device drivers are no longer in widespread use, we will
188 delete this feature.) See ovs-vswitchd.conf.db(5) for more
191 - Added ability to match on IPv6 flow label through NXM.
192 - Added ability to match on ECN bits in IPv4 and IPv6 through NXM.
193 - Added ability to match on TTL in IPv4 and IPv6 through NXM.
194 - Added ability to modify ECN bits in IPv4.
195 - Added ability to modify TTL in IPv4.
197 - Don't require the "normal" action to use mirrors. Traffic will
198 now be properly mirrored for any flows, regardless of their
200 - Track packet and byte statistics sent on mirrors.
201 - The sFlow implementation can now usually infer the correct agent
202 device instead of having to be told explicitly.
204 - New "fdb/flush" command to flush bridge's MAC learning table.
206 - A new distributed testing tool that allows one to diagnose performance
207 and connectivity issues. This tool currently is not included in RH or
209 - RHEL packaging now supports integration with Red Hat network scripts.
211 - Post 1.4.*, OVS will be changing the default bond mode from balance-slb
212 to active-backup. SLB bonds carry significant risks with them
213 (documented vswitchd/INTERNALS) which we want to prevent unsuspecting
214 users from running into. Users are advised to update any scripts or
215 configuration which may be negatively impacted by explicitly setting
216 the bond mode which they want to use.
220 ------------------------
222 - Added an OpenFlow extension which allows the "output" action to accept
224 - Added an OpenFlow extension for flexible learning.
225 - Bumped number of NXM registers from four to five.
227 - New "version" command to determine version of running daemon.
228 - If no argument is provided for "cfm/show", displays detailed
229 information about all interfaces with CFM enabled.
230 - If no argument is provided for "lacp/show", displays detailed
231 information about all ports with LACP enabled.
233 - New "set-if" command to modify a datapath port's configuration.
235 - The software switch now supports 255 OpenFlow tables, instead
236 of just one. By default, only table 0 is consulted, but the
237 new NXAST_RESUBMIT_TABLE action can look up in additional
238 tables. Tables 128 and above are reserved for use by the
239 switch itself; please use only tables 0 through 127.
240 - Add support for 802.1D spanning tree (STP).
241 - Fragment handling extensions:
242 - New OFPC_FRAG_NX_MATCH fragment handling mode, in which L4
243 fields are made available for matching in fragments with
245 - New NXM_NX_IP_FRAG match field for matching IP fragments (usable
246 via "ip_frag" in ovs-ofctl).
247 - New ovs-ofctl "get-frags" and "set-frags" commands to get and set
248 fragment handling policy.
249 - CAPWAP tunneling now supports an extension to transport a 64-bit key.
250 By default it remains compatible with the old version and other
251 standards-based implementations.
252 - Flow setups are now processed in a round-robin manner across ports
253 to prevent any single client from monopolizing the CPU and conducting
254 a denial of service attack.
255 - Added support for native VLAN tagging. A new "vlan_mode"
256 parameter can be set for "port". Possible values: "access",
257 "trunk", "native-tagged" and "native-untagged".
258 - test-openflowd has been removed. Please use ovs-vswitchd instead.
261 ------------------------
262 - New "ofproto" abstraction layer to ease porting to hardware
264 - Packaging for Red Hat Enterprise Linux 5.6 and 6.0.
265 - Datapath support for Linux kernels up to 3.0.
267 - New "bundle" and "bundle_load" action extensions.
269 - Implement table unique constraints.
270 - Support cooperative locking between callers.
272 - New "-s" option for "show" command prints packet and byte
273 counters for each port.
275 - New "--readd" option for "replace-flows".
277 - New "show" command to print an overview of configuration.
278 - New "comment" command to add remark that explains intentions.
279 - ovs-brcompatd has been rewritten to fix long-standing bugs.
280 - ovs-openflowd has been renamed test-openflowd and moved into the
281 tests directory. Its presence confused too many users. Please
282 use ovs-vswitchd instead.
283 - New ovs-benchmark utility to test flow setup performance.
284 - A new log level "off" has been added. Configuring a log facility
285 "off" prevents any messages from being logged to it. Previously,
286 "emer" was effectively "off" because no messages were ever logged at
287 level "emer". Now, errors that cause a process to exit are logged
289 - "configure" option --with-l26 has been renamed --with-linux, and
290 --with-l26-source has been renamed --with-linux-source. The old
291 names will be removed after the next release, so please update
293 - The "-2.6" suffix has been dropped from the datapath/linux-2.6 and
294 datapath/linux-2.6/compat-2.6 directories.
296 - Dropped support for "tun_id_from_cookie" OpenFlow extension.
297 Please use the extensible match extensions instead.
298 - Removed the Maintenance_Point and Monitor tables in an effort
299 to simplify 802.1ag configuration.
300 - Performance and scalability improvements
304 ------------------------
305 - Ability to define policies over IPv6
308 - Support for extensible match extensions to OpenFlow
310 - Support for HFSC qdisc.
311 - Queue used by in-band control can now be configured.
313 - Kernel<->userspace interface has been reworked and should be
314 close to a stable ABI now.
315 - "Port group" concept has been dropped.
316 - GRE over IPSEC tunnels
318 - New active backup bonding mode.
319 - New L4 hashing support when LACP is enabled.
320 - Source MAC hash now includes VLAN field also.
322 - Greatly improved handling of large flow tables
324 - "show" command now prints full vport configuration.
325 - "dump-groups" command removed since kernel support for
326 port groups was dropped.
328 - New commands for working with the new Managers table.
329 - "list" command enhanced with new formatting options and --columns
331 - "get" command now accepts new --id option.
332 - New "find" command.
334 - New "queue-stats" command for printing queue stats.
335 - New commands "replace-flows" and "diff-flows".
336 - Commands to add and remove flows can now read from files.
337 - New --flow-format option to enable or disable NXM.
338 - New --more option to increase OpenFlow message verbosity.
339 - Removed "tun-cookie" command, which is no longer useful.
340 - ovs-controller enhancements for testing various features.
341 - New ovs-vlan-test command for testing for Linux kernel driver VLAN
342 bugs. New ovs-vlan-bug-workaround command for enabling and
343 disabling a workaround for these driver bugs.
345 - "Resubmit" actions now update flow statistics.
346 - New "register" extension for use in matching and actions, via NXM.
347 - New "multipath" experimental action extension.
348 - New support for matching multicast Ethernet frames, via NXM.
349 - New extension for OpenFlow vendor error codes.
350 - New extension to set the QoS output queue without actually
351 sending to an output port.
352 - Open vSwitch now reports a single flow table, instead of
353 separate hash and wildcard tables. This better models the
354 current implementation.
355 - New experimental "note" action.
356 - New "ofproto/trace" ovs-appctl command and associated utilities
357 to ease debugging complex flow tables.
359 - Schema documentation now includes an entity-relationship diagram.
360 - The database is now garbage collected. In most tables,
361 unreferenced rows will be deleted automatically.
362 - Many tables now include statistics updated periodically by
363 ovs-vswitchd or ovsdb-server.
364 - Every table now has an "external-ids" column for use by OVS
366 - There is no default controller anymore. Each bridge must have its
367 controller individually specified.
368 - The "fail-mode" is now a property of a Bridge instead of a Controller.
369 - New versioning and checksum features.
370 - New Managers table and manager_options column in Open_vSwitch table
371 for specifying managers. The old "managers" column in the
372 Open_vSwitch table has been removed.
373 - Many "name" columns are now immutable.
375 - Dropped support for XenServer pre-5.6.100.
376 - Dropped support for Linux pre-2.6.18.
377 - Dropped controller discovery support.
378 - Dropped "ovs-ofctl status" and the OpenFlow extension that it used.
379 Statistics reporting in the database is a rough equivalent.
380 - Dropped the "corekeeper" package (now separate, at
381 http://openvswitch.org/cgi-bin/gitweb.cgi?p=corekeeper).
382 - Performance and scalability improvements
385 v1.1.0pre2 - 13 Sep 2010
386 ------------------------
389 v1.1.0pre1 - 31 Aug 2010
390 ------------------------
391 - OpenFlow 1.0 slicing (QoS) functionality
392 - Python bindings for configuration database (no write support)
393 - Performance and scalability improvements
398 - New "patch" interface type
403 - Configuration database with remote management
406 - Support for XenServer 5.5 and 5.6
407 - Performance and scalability improvements
410 v0.99.2 - 18 Feb 2010
411 ---------------------
414 v0.99.1 - 25 Jan 2010
415 ---------------------
416 - Add support for sFlow(R)
417 - Make headers compatible with C++
420 v0.99.0 - 14 Jan 2010
421 ---------------------
422 - User-space forwarding engine
425 v0.90.7 - 29 Nov 2009
426 ---------------------
427 - Add support for NetFlow active timeouts
434 v0.90.5 - 21 Sep 2009
435 ---------------------
436 - Generalize in-band control to more diverse network setups