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 - New "vlog/disable-rate-limit" and "vlog/enable-rate-limit" commands
7 available through ovs-appctl allow control over logging rate limits.
12 - The tunneling code no longer assumes input and output keys are symmetric.
13 If they are not, PMTUD needs to be disabled for tunneling to work. Note
14 this only applies to flow-based keys.
16 - Support for ipv6 set action.
17 - SKB mark matching and setting.
18 - support for Linux kernels up to 3.7
19 - FreeBSD is now a supported platform, thanks to code contributions from
20 Gaetano Catalli, Ed Maste, and Giuseppe Lettieri.
21 - ovs-bugtool: New --ovs option to report only OVS related information.
22 - New %t and %T log escapes to identify the subprogram within a
23 cooperating group of processes or threads that emitted a log message.
24 The default log patterns now include this information.
26 - Allow bitwise masking for SHA and THA fields in ARP, SLL and TLL
27 fields in IPv6 neighbor discovery messages, and IPv6 flow label.
28 - Adds support for writing to the metadata field for a flow.
29 - It is possible to request the OpenFlow port number with the
30 "ofport_request" column in the Interface table.
32 - Commands and actions that accept port numbers now also accept keywords
33 that represent those ports (such as LOCAL, NONE, and ALL). This is
34 also the recommended way to specify these ports, for compatibility
35 with OpenFlow 1.1 and later (which use the OpenFlow 1.0 numbers
36 for these ports for different purposes).
38 - Support requesting the port number with the "port_no" option in
40 - The "dump-flows" and "del-flows" no longer require an argument
41 if only one datapath exists.
43 - New "dpif/dump-dps", "dpif/show", and "dpif/dump-flows" command
44 that mimic the equivalent ovs-dpctl commands.
45 - ovs-pki: The "online PKI" features have been removed, along with
46 the ovs-pki-cgi program that facilitated it, because of some
47 alarmist insecurity claims. We do not believe that these claims
48 are true, but because we do not know of any users for this
49 feature it seems better on balance to remove it. (The ovs-pki-cgi
50 program was not included in distribution packaging.)
51 - Tunnel Path MTU Discovery default value was set to 'disabled'. This
52 feature is deprecated and will be removed soon.
53 - ovsdb-server now enforces the immutability of immutable columns. This
54 was not enforced in earlier versions due to an oversight.
55 - New support for a nonstandard form of GRE that supports a 64-bit key.
56 - The ofproto library is now responsible for assigning OpenFlow port
57 numbers. An ofproto implementation should assign them when
58 port_construct() is called.
59 - All dpif-based bridges of a particular type share a common
60 datapath called "ovs-<type>", e.g. "ovs-system". The ovs-dpctl
61 commands will now return information on that shared datapath. To
62 get the equivalent bridge-specific information, use the new
63 "ovs-appctl dpif/*" commands.
64 - Tunnel header caching removed.
65 - The following features are now deprecated. They will be removed no
66 earlier than February 2013. Please email dev@openvswitch.org with
69 - The autopath action.
70 - Interface type "null".
71 - Numeric values for reserved ports (see "ovs-ofctl" note above).
72 - Tunnel Path MTU Discovery.
73 - CAPWAP tunnel support.
74 - The data in the RARP packets can now be matched in the same way as the
79 ------------------------
80 - New FAQ. Please send updates and additions!
81 - Authors of controllers, please read the new section titled "Action
82 Reproduction" in DESIGN, which describes an Open vSwitch change in
83 behavior in corner cases that may affect some controllers.
85 - A new test utility that can create L3 tunnel between two Open
86 vSwitches and detect connectivity issues.
88 - New --sort and --rsort options for "dump-flows" command.
89 - "mod-port" command can now control all OpenFlow config flags.
91 - Allow general bitwise masking for IPv4 and IPv6 addresses in
92 IPv4, IPv6, and ARP packets. (Previously, only CIDR masks
94 - Allow support for arbitrary Ethernet masks. (Previously, only
95 the multicast bit in the destination address could be individually
97 - New field OXM_OF_METADATA, to align with OpenFlow 1.1.
98 - The OFPST_QUEUE request now reports an error if a specified port or
99 queue does not exist, or for requests for a specific queue on all
100 ports, if the specified queue does not exist on any port. (Previous
101 versions generally reported an empty set of results.)
102 - New "flow monitor" feature to allow controllers to be notified of
103 flow table changes as they happen.
104 - Additional protocols are not mirrored and dropped when forward-bpdu is
105 false. For a full list, see the ovs-vswitchd.conf.db man page.
106 - Open vSwitch now sends RARP packets in situations where it previously
107 sent a custom protocol, making it consistent with behavior of QEMU and
109 - All Open vSwitch programs and log files now show timestamps in UTC,
110 instead the local timezone, by default.
114 ------------------------
115 - kernel modules are renamed. openvswitch_mod.ko is now
116 openvswitch.ko and brcompat_mod.ko is now brcompat.ko.
117 - Increased the number of NXM registers to 8.
118 - Added ability to configure DSCP setting for manager and controller
119 connections. By default, these connections have a DSCP value of
120 Internetwork Control (0xc0).
121 - Added the granular link health statistics, 'cfm_health', to an
124 - Added support to mask nd_target for ICMPv6 neighbor discovery flows.
125 - Added support for OpenFlow 1.3 port description (OFPMP_PORT_DESC)
128 - Added the "dump-ports-desc" command to retrieve port
129 information using the new port description multipart messages.
131 - Added support for spawning ovs-test server from the client.
132 - Now ovs-test is able to automatically create test bridges and ports.
133 - "ovs-dpctl dump-flows" now prints observed TCP flags in TCP flows.
134 - Tripled flow setup performance.
135 - The "coverage/log" command previously available through ovs-appctl
136 has been replaced by "coverage/show". The new command replies with
137 coverage counter values, instead of logging them.
141 ------------------------
142 - Allow OFPP_CONTROLLER as the in_port for packet-out messages.
146 ------------------------
147 *** Internal only release ***
149 - LACP bonds no longer fall back to balance-slb when negotiations fail.
150 Instead they drop traffic.
151 - The default bond_mode changed from SLB to active-backup, to protect
152 unsuspecting users from the significant risks of SLB bonds (which are
153 documented in vswitchd/INTERNALS).
154 - Load balancing can be disabled by setting the bond-rebalance-interval
157 - Added support for bitwise matching on TCP and UDP ports.
158 See ovs-ofctl(8) for more information.
159 - NXM flow dumps now include times elapsed toward idle and hard
161 - Added an OpenFlow extension NXT_SET_ASYNC_CONFIG that allows
162 controllers more precise control over which OpenFlow messages they
163 receive asynchronously.
164 - New "fin_timeout" action.
165 - Added "fin_timeout" support to "learn" action.
166 - New Nicira action NXAST_CONTROLLER that offers additional features
167 over output to OFPP_CONTROLLER.
168 - When QoS settings for an interface do not configure a default queue
169 (queue 0), Open vSwitch now uses a default configuration for that
170 queue, instead of dropping all packets as in previous versions.
172 - Logging to console and file will have UTC timestamp as a default for
173 all the daemons. An example of the default format is
174 2012-01-27T16:35:17Z. ovs-appctl can be used to change the default
176 - The syntax of commands and options to set log levels was simplified,
177 to make it easier to remember.
178 - New support for limiting the number of flows in an OpenFlow flow
179 table, with configurable policy for evicting flows upon
180 overflow. See the Flow_Table table in ovs-vswitch.conf.db(5)
181 for more information.
182 - New "enable-async-messages" column in the Controller table. If set to
183 false, OpenFlow connections to the controller will initially have all
184 asynchronous messages disabled, overriding normal OpenFlow behavior.
185 - ofproto-provider interface:
186 - "struct rule" has a new member "used" that ofproto implementations
187 should maintain by updating with ofproto_rule_update_used().
189 - The new option --timestamp causes the "monitor" command to print
190 a timestamp with every update.
191 - CFM module CCM broadcasts can now be tagged with an 802.1p priority.
195 ------------------------
197 - Added support for querying, modifying, and deleting flows
198 based on flow cookie when using NXM.
199 - Added new NXM_PACKET_IN format.
200 - Added new NXAST_DEC_TTL action.
202 - Added daemonization support to the monitor and snoop commands.
204 - The "find" command supports new set relational operators
205 {=}, {!=}, {<}, {>}, {<=}, and {>=}.
206 - ovsdb-tool now uses the typical database and schema installation
207 directories as defaults.
208 - The default MAC learning timeout has been increased from 60 seconds
209 to 300 seconds. The MAC learning timeout is now configurable.
213 ------------------------
214 - Compatible with Open vSwitch kernel module included in Linux 3.3.
215 - New "VLAN splinters" feature to work around buggy device drivers
216 in old Linux versions. (This feature is deprecated. When
217 broken device drivers are no longer in widespread use, we will
218 delete this feature.) See ovs-vswitchd.conf.db(5) for more
221 - Added ability to match on IPv6 flow label through NXM.
222 - Added ability to match on ECN bits in IPv4 and IPv6 through NXM.
223 - Added ability to match on TTL in IPv4 and IPv6 through NXM.
224 - Added ability to modify ECN bits in IPv4.
225 - Added ability to modify TTL in IPv4.
227 - Don't require the "normal" action to use mirrors. Traffic will
228 now be properly mirrored for any flows, regardless of their
230 - Track packet and byte statistics sent on mirrors.
231 - The sFlow implementation can now usually infer the correct agent
232 device instead of having to be told explicitly.
234 - New "fdb/flush" command to flush bridge's MAC learning table.
236 - A new distributed testing tool that allows one to diagnose performance
237 and connectivity issues. This tool currently is not included in RH or
239 - RHEL packaging now supports integration with Red Hat network scripts.
241 - Post 1.4.*, OVS will be changing the default bond mode from balance-slb
242 to active-backup. SLB bonds carry significant risks with them
243 (documented vswitchd/INTERNALS) which we want to prevent unsuspecting
244 users from running into. Users are advised to update any scripts or
245 configuration which may be negatively impacted by explicitly setting
246 the bond mode which they want to use.
250 ------------------------
252 - Added an OpenFlow extension which allows the "output" action to accept
254 - Added an OpenFlow extension for flexible learning.
255 - Bumped number of NXM registers from four to five.
257 - New "version" command to determine version of running daemon.
258 - If no argument is provided for "cfm/show", displays detailed
259 information about all interfaces with CFM enabled.
260 - If no argument is provided for "lacp/show", displays detailed
261 information about all ports with LACP enabled.
263 - New "set-if" command to modify a datapath port's configuration.
265 - The software switch now supports 255 OpenFlow tables, instead
266 of just one. By default, only table 0 is consulted, but the
267 new NXAST_RESUBMIT_TABLE action can look up in additional
268 tables. Tables 128 and above are reserved for use by the
269 switch itself; please use only tables 0 through 127.
270 - Add support for 802.1D spanning tree (STP).
271 - Fragment handling extensions:
272 - New OFPC_FRAG_NX_MATCH fragment handling mode, in which L4
273 fields are made available for matching in fragments with
275 - New NXM_NX_IP_FRAG match field for matching IP fragments (usable
276 via "ip_frag" in ovs-ofctl).
277 - New ovs-ofctl "get-frags" and "set-frags" commands to get and set
278 fragment handling policy.
279 - CAPWAP tunneling now supports an extension to transport a 64-bit key.
280 By default it remains compatible with the old version and other
281 standards-based implementations.
282 - Flow setups are now processed in a round-robin manner across ports
283 to prevent any single client from monopolizing the CPU and conducting
284 a denial of service attack.
285 - Added support for native VLAN tagging. A new "vlan_mode"
286 parameter can be set for "port". Possible values: "access",
287 "trunk", "native-tagged" and "native-untagged".
288 - test-openflowd has been removed. Please use ovs-vswitchd instead.
291 ------------------------
292 - New "ofproto" abstraction layer to ease porting to hardware
294 - Packaging for Red Hat Enterprise Linux 5.6 and 6.0.
295 - Datapath support for Linux kernels up to 3.0.
297 - New "bundle" and "bundle_load" action extensions.
299 - Implement table unique constraints.
300 - Support cooperative locking between callers.
302 - New "-s" option for "show" command prints packet and byte
303 counters for each port.
305 - New "--readd" option for "replace-flows".
307 - New "show" command to print an overview of configuration.
308 - New "comment" command to add remark that explains intentions.
309 - ovs-brcompatd has been rewritten to fix long-standing bugs.
310 - ovs-openflowd has been renamed test-openflowd and moved into the
311 tests directory. Its presence confused too many users. Please
312 use ovs-vswitchd instead.
313 - New ovs-benchmark utility to test flow setup performance.
314 - A new log level "off" has been added. Configuring a log facility
315 "off" prevents any messages from being logged to it. Previously,
316 "emer" was effectively "off" because no messages were ever logged at
317 level "emer". Now, errors that cause a process to exit are logged
319 - "configure" option --with-l26 has been renamed --with-linux, and
320 --with-l26-source has been renamed --with-linux-source. The old
321 names will be removed after the next release, so please update
323 - The "-2.6" suffix has been dropped from the datapath/linux-2.6 and
324 datapath/linux-2.6/compat-2.6 directories.
326 - Dropped support for "tun_id_from_cookie" OpenFlow extension.
327 Please use the extensible match extensions instead.
328 - Removed the Maintenance_Point and Monitor tables in an effort
329 to simplify 802.1ag configuration.
330 - Performance and scalability improvements
334 ------------------------
335 - Ability to define policies over IPv6
338 - Support for extensible match extensions to OpenFlow
340 - Support for HFSC qdisc.
341 - Queue used by in-band control can now be configured.
343 - Kernel<->userspace interface has been reworked and should be
344 close to a stable ABI now.
345 - "Port group" concept has been dropped.
346 - GRE over IPSEC tunnels
348 - New active backup bonding mode.
349 - New L4 hashing support when LACP is enabled.
350 - Source MAC hash now includes VLAN field also.
352 - Greatly improved handling of large flow tables
354 - "show" command now prints full vport configuration.
355 - "dump-groups" command removed since kernel support for
356 port groups was dropped.
358 - New commands for working with the new Managers table.
359 - "list" command enhanced with new formatting options and --columns
361 - "get" command now accepts new --id option.
362 - New "find" command.
364 - New "queue-stats" command for printing queue stats.
365 - New commands "replace-flows" and "diff-flows".
366 - Commands to add and remove flows can now read from files.
367 - New --flow-format option to enable or disable NXM.
368 - New --more option to increase OpenFlow message verbosity.
369 - Removed "tun-cookie" command, which is no longer useful.
370 - ovs-controller enhancements for testing various features.
371 - New ovs-vlan-test command for testing for Linux kernel driver VLAN
372 bugs. New ovs-vlan-bug-workaround command for enabling and
373 disabling a workaround for these driver bugs.
375 - "Resubmit" actions now update flow statistics.
376 - New "register" extension for use in matching and actions, via NXM.
377 - New "multipath" experimental action extension.
378 - New support for matching multicast Ethernet frames, via NXM.
379 - New extension for OpenFlow vendor error codes.
380 - New extension to set the QoS output queue without actually
381 sending to an output port.
382 - Open vSwitch now reports a single flow table, instead of
383 separate hash and wildcard tables. This better models the
384 current implementation.
385 - New experimental "note" action.
386 - New "ofproto/trace" ovs-appctl command and associated utilities
387 to ease debugging complex flow tables.
389 - Schema documentation now includes an entity-relationship diagram.
390 - The database is now garbage collected. In most tables,
391 unreferenced rows will be deleted automatically.
392 - Many tables now include statistics updated periodically by
393 ovs-vswitchd or ovsdb-server.
394 - Every table now has an "external-ids" column for use by OVS
396 - There is no default controller anymore. Each bridge must have its
397 controller individually specified.
398 - The "fail-mode" is now a property of a Bridge instead of a Controller.
399 - New versioning and checksum features.
400 - New Managers table and manager_options column in Open_vSwitch table
401 for specifying managers. The old "managers" column in the
402 Open_vSwitch table has been removed.
403 - Many "name" columns are now immutable.
405 - Dropped support for XenServer pre-5.6.100.
406 - Dropped support for Linux pre-2.6.18.
407 - Dropped controller discovery support.
408 - Dropped "ovs-ofctl status" and the OpenFlow extension that it used.
409 Statistics reporting in the database is a rough equivalent.
410 - Dropped the "corekeeper" package (now separate, at
411 http://openvswitch.org/cgi-bin/gitweb.cgi?p=corekeeper).
412 - Performance and scalability improvements
415 v1.1.0pre2 - 13 Sep 2010
416 ------------------------
419 v1.1.0pre1 - 31 Aug 2010
420 ------------------------
421 - OpenFlow 1.0 slicing (QoS) functionality
422 - Python bindings for configuration database (no write support)
423 - Performance and scalability improvements
428 - New "patch" interface type
433 - Configuration database with remote management
436 - Support for XenServer 5.5 and 5.6
437 - Performance and scalability improvements
440 v0.99.2 - 18 Feb 2010
441 ---------------------
444 v0.99.1 - 25 Jan 2010
445 ---------------------
446 - Add support for sFlow(R)
447 - Make headers compatible with C++
450 v0.99.0 - 14 Jan 2010
451 ---------------------
452 - User-space forwarding engine
455 v0.90.7 - 29 Nov 2009
456 ---------------------
457 - Add support for NetFlow active timeouts
464 v0.90.5 - 21 Sep 2009
465 ---------------------
466 - Generalize in-band control to more diverse network setups