3 - Dropped support for Python older than version 2.7. As a consequence,
4 using Open vSwitch 2.5 or later on XenServer 6.5 or earlier (which
5 have Python 2.4) requires first installing Python 2.7.
7 * Group chaining (where one OpenFlow group triggers another) is
9 * OpenFlow 1.4+ "importance" is now considered for flow eviction.
10 * OpenFlow 1.4+ OFPTC_EVICTION is now implemented.
11 * OpenFlow 1.4+ OFPMP_TABLE_DESC is now implemented.
12 - Support for matching/generating options as well as the OAM bit with
14 - Support Multicast Listener Discovery (MLDv1 and MLDv2).
15 - Add 'symmetric_l3l4' and 'symmetric_l3l4+udp' hash functions.
16 - sFlow agent now reports tunnel and MPLS structures.
17 - Added OpenFlow 1.4+ OFPT_SET_ASYNC_CONFIG and OFPT_GET_ASYNC_CONFIG
18 that allows controllers to have more precise control over OpenFlow1.4
19 asynchronous messages.
24 - Flow table modifications are now atomic, meaning that each packet
25 now sees a coherent version of the OpenFlow pipeline. For
26 example, if a controller removes all flows with a single OpenFlow
27 "flow_mod", no packet sees an intermediate version of the OpenFlow
28 pipeline where only some of the flows have been deleted.
29 - Added support for SFQ, FQ_CoDel and CoDel qdiscs.
30 - Add bash command-line completion support for ovs-vsctl Please check
31 utilities/ovs-command-compgen.INSTALL.md for how to use.
32 - The MAC learning feature now includes per-port fairness to mitigate
34 - New support for a "conjunctive match" OpenFlow extension, which
35 allows constructing OpenFlow matches of the form "field1 in
36 {a,b,c...} AND field2 in {d,e,f...}" and generalizations. For details,
37 see documentation for the "conjunction" action in ovs-ofctl(8).
38 - Add bash command-line completion support for ovs-appctl/ovs-dpctl/
39 ovs-ofctl/ovsdb-tool commands. Please check
40 utilities/ovs-command-compgen.INSTALL.md for how to use.
41 - The "learn" action supports a new flag "delete_learned" that causes
42 the learned flows to be deleted when the flow with the "learn" action
44 - Basic support for the Geneve tunneling protocol. It is not yet
45 possible to generate or match options. This is planned for a future
46 release. The protocol is documented at
47 http://tools.ietf.org/html/draft-gross-geneve-00
48 - The OVS database now reports controller rate limiting statistics.
49 - sflow now exports information about LACP-based bonds, port names, and
50 OpenFlow port numbers, as well as datapath performance counters.
51 - ovs-dpctl functionality is now available for datapaths integrated
52 into ovs-vswitchd, via ovs-appctl. Some existing ovs-appctl
53 commands are now redundant and will be removed in a future
54 release. See ovs-vswitchd(8) for details.
56 * OpenFlow 1.4 bundles are now supported for flow mods and port
57 mods. For flow mods, both 'atomic' and 'ordered' bundle flags
58 are trivially supported, as all bundled messages are executed
59 in the order they were added and all flow table modifications
60 are now atomic to the datapath. Port mods may not appear in
61 atomic bundles, as port status modifications are not atomic.
62 * IPv6 flow label and neighbor discovery fields are now modifiable.
63 * OpenFlow 1.5 extended registers are now supported.
64 * The OpenFlow 1.5 actset_output field is now supported.
65 * OpenFlow 1.5 Copy-Field action is now supported.
66 * OpenFlow 1.5 masked Set-Field action is now supported.
67 * OpenFlow 1.3+ table features requests are now supported (read-only).
68 * Nicira extension "move" actions may now be included in action sets.
69 * "resubmit" actions may now be included in action sets. The resubmit
70 is executed last, and only if the action set has no "output" or "group"
72 * OpenFlow 1.4+ flow "importance" is now maintained in the flow table.
73 * A new Netronome extension to OpenFlow 1.5+ allows control over the
74 fields hashed for OpenFlow select groups. See "selection_method" and
75 related options in ovs-ofctl(8) for details.
76 - ovs-ofctl has a new '--bundle' option that makes the flow mod commands
77 ('add-flow', 'add-flows', 'mod-flows', 'del-flows', and 'replace-flows')
78 use an OpenFlow 1.4 bundle to operate the modifications as a single
79 atomic transaction. If any of the flow mods in a transaction fail, none
80 of them are executed. All flow mods in a bundle appear to datapath
81 lookups simultaneously.
82 - ovs-ofctl 'add-flow' and 'add-flows' commands now accept arbitrary flow
83 mods as an input by allowing the flow specification to start with an
84 explicit 'add', 'modify', 'modify_strict', 'delete', or 'delete_strict'
85 keyword. A missing keyword is treated as 'add', so this is fully
86 backwards compatible. With the new '--bundle' option all the flow mods
87 are executed as a single atomic transaction using an OpenFlow 1.4 bundle.
88 - ovs-pki: Changed message digest algorithm from MD5 to SHA-1 because
89 MD5 is no longer secure and some operating systems have started to disable
91 - ovsdb-server: New OVSDB protocol extension allows inequality tests on
92 "optional scalar" columns. See ovsdb-server(1) for details.
93 - ovs-vsctl now permits immutable columns in a new row to be modified in
94 the same transaction that creates the row.
95 - test-controller has been renamed ovs-testcontroller at request of users
96 who find it useful for testing basic OpenFlow setups. It is still not
97 a necessary or desirable part of most Open vSwitch deployments.
98 - Support for travis-ci.org based continuous integration builds has been
99 added. Build failures are reported to build@openvswitch.org. See INSTALL.md
100 file for additional details.
101 - Support for the Rapid Spanning Tree Protocol (IEEE 802.1D-2004).
102 The implementation has been tested successfully against the Ixia Automated
103 Network Validation Library (ANVL).
104 - Stats are no longer updated on fake bond interface.
105 - Keep active bond slave selection across OVS restart.
106 - A simple wrapper script, 'ovs-docker', to integrate OVS with Docker
107 containers. If and when there is a native integration of Open vSwitch
108 with Docker, the wrapper script will be retired.
109 - Added support for DPDK Tunneling. VXLAN, GRE, and Geneve are supported
110 protocols. This is generic tunneling mechanism for userspace datapath.
111 - Support for multicast snooping (IGMPv1, IGMPv2 and IGMPv3)
112 - Support for Linux kernels up to 4.0.x
113 - The documentation now use the term 'destination' to mean one of syslog,
114 console or file for vlog logging instead of the previously used term
116 - Support for VXLAN Group Policy extension
117 - Initial support for the IETF Auto-Attach SPBM draft standard. This
118 contains rudimentary support for the LLDP protocol as needed for
120 - The default OpenFlow and OVSDB ports are now the IANA-assigned
121 numbers. OpenFlow is 6653 and OVSDB is 6640.
122 - Support for DPDK vHost.
123 - Support for outer UDP checksums in Geneve and VXLAN.
124 - The kernel vports with dependencies are no longer part of the overall
125 openvswitch.ko but built and loaded automatically as individual kernel
126 modules (vport-*.ko).
127 - Support for STT tunneling.
128 - ovs-sim: New developer tool for simulating multiple OVS instances.
129 See ovs-sim(1) for more information.
130 - Support to configure method (--syslog-method argument) that determines
131 how daemons will talk with syslog.
132 - Support for "ovs-appctl vlog/list-pattern" command that lets to query
133 logging message format for each destination.
137 ---------------------
138 - OpenFlow 1.1, 1.2, and 1.3 are now enabled by default in
140 - Linux kernel datapath now has an exact match cache optimizing the
141 flow matching process.
142 - Datapath flows now have partially wildcarded tranport port field
143 matches. This reduces userspace upcalls, but increases the
144 number of different masks in the datapath. The kernel datapath
145 exact match cache removes the overhead of matching the incoming
146 packets with the larger number of masks, but when paired with an
147 older kernel module, some workloads may perform worse with the
149 - Compatibility with autoconf 2.63 (previously >=2.64)
151 v2.2.0 - Internal Release
152 ---------------------
153 - Internal ports are no longer brought up by default, because it
154 should be an administrator task to bring up devices as they are
156 - ovs-vsctl now reports when ovs-vswitchd fails to create a new port or
158 - Port creation and configuration errors are now stored in a new error
159 column of the Interface table and included in 'ovs-vsctl show'.
160 - The "ovsdbmonitor" graphical tool has been removed, because it was
161 poorly maintained and not widely used.
162 - New "check-ryu" Makefile target for running Ryu tests for OpenFlow
163 controllers against Open vSwitch. See INSTALL.md for details.
164 - Added IPFIX support for SCTP flows and templates for ICMPv4/v6 flows.
165 - Upon the receipt of a SIGHUP signal, ovs-vswitchd no longer reopens its
166 log file (it will terminate instead). Please use 'ovs-appctl vlog/reopen'
168 - Support for Linux kernels up to 3.14. From Kernel 3.12 onwards OVS uses
169 tunnel API for GRE and VXLAN.
170 - Added DPDK support.
171 - Added support for custom vlog patterns in Python
175 ---------------------
176 - Address prefix tracking support for flow tables. New columns
177 "prefixes" in OVS-DB table "Flow_Table" controls which packet
178 header fields are used for address prefix tracking. Prefix
179 tracking allows the classifier to skip rules with longer than
180 necessary prefixes, resulting in better wildcarding for datapath
181 flows. Default configuration is to not use any fields for prefix
182 tracking. However, if any flow tables contain both exact matches
183 and masked matches for IP address fields, OVS performance may be
184 increased by using this feature.
185 * As of now, the fields for which prefix lookup can be enabled
186 are: 'tun_id', 'tun_src', 'tun_dst', 'nw_src', 'nw_dst' (or
187 aliases 'ip_src' and 'ip_dst'), 'ipv6_src', and 'ipv6_dst'.
188 (Using this feature for 'tun_id' would only make sense if the
189 tunnel IDs have prefix structure similar to IP addresses.)
190 * There is a maximum number of fields that can be enabled for any
191 one flow table. Currently this limit is 3.
193 $ ovs-vsctl set Bridge br0 flow_tables:0=@N1 -- \
194 --id=@N1 create Flow_Table name=table0
195 $ ovs-vsctl set Bridge br0 flow_tables:1=@N1 -- \
196 --id=@N1 create Flow_Table name=table1
197 $ ovs-vsctl set Flow_Table table0 prefixes=ip_dst,ip_src
198 $ ovs-vsctl set Flow_Table table1 prefixes=[]
199 - TCP flags matching: OVS now supports matching of TCP flags. This
200 has an adverse performance impact when using OVS userspace 1.10
201 or older (no megaflows support) together with the new OVS kernel
202 module. It is recommended that the kernel and userspace modules
203 both are upgraded at the same time.
204 - The default OpenFlow and OVSDB ports will change to
205 IANA-assigned numbers in a future release. Consider updating
206 your installations to specify port numbers instead of using the
209 * The OpenFlow 1.1+ "Write-Actions" instruction is now supported.
210 * OVS limits the OpenFlow port numbers it assigns to port 32767 and
211 below, leaving port numbers above that range free for assignment
213 * ovs-vswitchd now honors changes to the "ofport_request" column
214 in the Interface table by changing the port's OpenFlow port
216 * The Open vSwitch software switch now supports OpenFlow groups.
217 - ovs-vswitchd.conf.db.5 man page will contain graphviz/dot
218 diagram only if graphviz package was installed at the build time.
219 - Support for Linux kernels up to 3.11
221 The "show" command also displays mega flow mask stats.
223 * New command "ofp-parse-pcap" to dump OpenFlow from PCAP files.
224 - ovs-controller has been renamed test-controller. It is no longer
225 packaged or installed by default, because too many users assumed
226 incorrectly that ovs-controller was a necessary or desirable part
227 of an Open vSwitch deployment.
228 - Added vlog option to export to a UDP syslog sink.
230 * The "monitor" command can now monitor all tables in a database,
231 instead of being limited to a single table.
232 - The flow-eviction-threshold has been replaced by the flow-limit which is a
233 hard limit on the number of flows in the datapath. It defaults to 200,000
234 flows. OVS automatically adjusts this number depending on network
236 - Added IPv6 support for active and passive socket communications.
240 ---------------------
241 - The ovs-vswitchd process is no longer single-threaded. Multiple
242 threads are now used to handle flow set up and asynchronous
245 * Experimental support for OpenFlow 1.1 (in addition to 1.2 and
246 1.3, which had experimental support in 1.10).
247 * Experimental protocol support for OpenFlow 1.1+ groups. This
248 does not yet include an implementation in the Open vSwitch
250 * Experimental protocol support for OpenFlow 1.2+ meters. This
251 does not yet include an implementation in the Open vSwitch
253 * New support for matching outer source and destination IP address
254 of tunneled packets, for tunnel ports configured with the newly
255 added "remote_ip=flow" and "local_ip=flow" options.
256 * Support for matching on metadata 'pkt_mark' for interacting with
257 other system components. On Linux this corresponds to the skb
259 * Support matching, rewriting SCTP ports
260 - The Interface table in the database has a new "ifindex" column to
261 report the interface's OS-assigned ifindex.
262 - New "check-oftest" Makefile target for running OFTest against Open
263 vSwitch. See README-OFTest for details.
264 - The flow eviction threshold has been moved to the Open_vSwitch table.
265 - Database names are now mandatory when specifying ovsdb-server options
266 through database paths (e.g. Private key option with the database name
267 should look like "--private-key=db:Open_vSwitch,SSL,private_key").
268 - Added ovs-dev.py, a utility script helpful for Open vSwitch developers.
269 - Support for Linux kernels up to 3.10
271 * New "ofp-parse" for printing OpenFlow messages read from a file.
272 * New commands for OpenFlow 1.1+ groups.
273 - Added configurable flow caching support to IPFIX exporter.
274 - Dropped support for Linux pre-2.6.32.
275 - Log file timestamps and ovsdb commit timestamps are now reported
276 with millisecond resolution. (Previous versions only reported
280 v1.11.0 - 28 Aug 2013
281 ---------------------
282 - Support for megaflows, which allows wildcarding in the kernel (and
283 any dpif implementation that supports wildcards). Depending on
284 the flow table and switch configuration, flow set up rates are
285 close to the Linux bridge.
286 - The "tutorial" directory contains a new tutorial for some advanced
287 Open vSwitch features.
288 - Stable bond mode has been removed.
289 - The autopath action has been removed.
290 - New support for the data encapsulation format of the LISP tunnel
291 protocol (RFC 6830). An external control plane or manual flow
292 setup is required for EID-to-RLOC mapping.
294 * The "dec_mpls_ttl" and "set_mpls_ttl" actions from OpenFlow
295 1.1 and later are now implemented.
296 * New "stack" extension for use in actions, to push and pop from
298 * The "load" and "set_field" actions can now modify the "in_port". (This
299 allows one to enable output to a flow's input port by setting the
300 in_port to some unused value, such as OFPP_NONE.)
302 * New debugging commands "add-flow", "mod-flow", "del-flow".
303 * "dump-flows" now has a -m option to increase output verbosity.
304 - In dpif-based bridges, cache action translations, which can improve
305 flow set up performance by 80% with a complicated flow table.
306 - New syslog format, prefixed with "ovs|", to be easier to filter.
307 - RHEL: Removes the default firewall rule that allowed GRE traffic to
308 pass through. Any users that relied on this automatic firewall hole
309 will have to manually configure it. The ovs-ctl(8) manpage documents
310 the "enable-protocol" command that can be used as an alternative.
311 - New CFM demand mode which uses data traffic to indicate interface
314 v1.10.0 - 01 May 2013
315 ---------------------
316 - Bridge compatibility support has been removed. Any uses that
317 rely on ovs-brcompatd will have to stick with Open vSwitch 1.9.x
318 or adapt to native Open vSwitch support (e.g. use ovs-vsctl instead
320 - The maximum size of the MAC learning table is now configurable.
321 - With the Linux datapath, packets for new flows are now queued
322 separately on a per-port basis, so it should no longer be
323 possible for a large number of new flows arriving on one port to
324 prevent new flows from being processed on other ports.
326 * Previously ovs-vsctl would retry connecting to the database forever,
327 causing it to hang if ovsdb-server was not running. Now, ovs-vsctl
328 only tries once by default (use --retry to try forever). This change
329 means that you may want to remove uses of --timeout to avoid hangs
331 * Many "ovs-vsctl" database commands now accept an --if-exists option.
332 Please refer to the ovs-vsctl manpage for details.
334 - Experimental support for newer versions of OpenFlow. See
335 the "What versions of OpenFlow does Open vSwitch support?"
336 question in the FAQ for more details.
337 - The OpenFlow "dp_desc" may now be configured by setting the
338 value of other-config:dp-desc in the Bridge table.
339 - It is possible to request the OpenFlow port number with the
340 "ofport_request" column in the Interface table.
341 - The NXM flow_removed message now reports the OpenFlow table ID
342 from which the flow was removed.
344 - New support for the VXLAN tunnel protocol (see the IETF draft here:
345 http://tools.ietf.org/html/draft-mahalingam-dutt-dcops-vxlan-03).
346 - Tunneling requires the version of the kernel module paired with
347 Open vSwitch 1.9.0 or later.
348 - Inheritance of the Don't Fragment bit in IP tunnels (df_inherit)
349 is no longer supported.
350 - Path MTU discovery is no longer supported.
351 - CAPWAP tunneling support removed.
352 - Tunnels with multicast destination ports are no longer supported.
354 - The "dump-flows" and "del-flows" no longer require an argument
355 if only one datapath exists.
357 - New "vlog/disable-rate-limit" and "vlog/enable-rate-limit"
358 commands available allow control over logging rate limits.
359 - New "dpif/dump-dps", "dpif/show", and "dpif/dump-flows" command
360 that mimic the equivalent ovs-dpctl commands.
361 - The ofproto library is now responsible for assigning OpenFlow port
362 numbers. An ofproto implementation should assign them when
363 port_construct() is called.
364 - All dpif-based bridges of a particular type share a common
365 datapath called "ovs-<type>", e.g. "ovs-system". The ovs-dpctl
366 commands will now return information on that shared datapath. To
367 get the equivalent bridge-specific information, use the new
368 "ovs-appctl dpif/*" commands.
369 - Backward-incompatible changes:
370 - Earlier Open vSwitch versions treated ANY as a wildcard in flow
371 syntax. OpenFlow 1.1 adds a port named ANY, which introduces a
372 conflict. ANY was rarely used in flow syntax, so we chose to
373 retire that meaning of ANY in favor of the OpenFlow 1.1 meaning.
374 - Patch ports no longer require kernel support, so they now work
375 with FreeBSD and the kernel module built into Linux 3.3 and later.
376 - New "sample" action.
380 ------------------------
382 - Support for ipv6 set action.
383 - SKB mark matching and setting.
384 - support for Linux kernels up to 3.8
385 - FreeBSD is now a supported platform, thanks to code contributions from
386 Gaetano Catalli, Ed Maste, and Giuseppe Lettieri.
387 - ovs-bugtool: New --ovs option to report only OVS related information.
388 - New %t and %T log escapes to identify the subprogram within a
389 cooperating group of processes or threads that emitted a log message.
390 The default log patterns now include this information.
392 - Allow bitwise masking for SHA and THA fields in ARP, SLL and TLL
393 fields in IPv6 neighbor discovery messages, and IPv6 flow label.
394 - Adds support for writing to the metadata field for a flow.
396 - The tunneling code no longer assumes input and output keys are
397 symmetric. If they are not, PMTUD needs to be disabled for
398 tunneling to work. Note this only applies to flow-based keys.
399 - New support for a nonstandard form of GRE that supports a 64-bit key.
400 - Tunnel Path MTU Discovery default value was set to 'disabled'.
401 This feature is deprecated and will be removed soon.
402 - Tunnel header caching removed.
404 - Commands and actions that accept port numbers now also accept keywords
405 that represent those ports (such as LOCAL, NONE, and ALL). This is
406 also the recommended way to specify these ports, for compatibility
407 with OpenFlow 1.1 and later (which use the OpenFlow 1.0 numbers
408 for these ports for different purposes).
410 - Support requesting the port number with the "port_no" option in
411 the "add-if" command.
412 - ovs-pki: The "online PKI" features have been removed, along with
413 the ovs-pki-cgi program that facilitated it, because of some
414 alarmist insecurity claims. We do not believe that these claims
415 are true, but because we do not know of any users for this
416 feature it seems better on balance to remove it. (The ovs-pki-cgi
417 program was not included in distribution packaging.)
418 - ovsdb-server now enforces the immutability of immutable columns. This
419 was not enforced in earlier versions due to an oversight.
420 - The following features are now deprecated. They will be removed no
421 earlier than February 2013. Please email dev@openvswitch.org with
423 - Bridge compatibility.
425 - The autopath action.
426 - Interface type "null".
427 - Numeric values for reserved ports (see "ovs-ofctl" note above).
428 - Tunnel Path MTU Discovery.
429 - CAPWAP tunnel support.
430 - The data in the RARP packets can now be matched in the same way as the
435 ------------------------
436 *** Internal only release ***
437 - New FAQ. Please send updates and additions!
438 - Authors of controllers, please read the new section titled "Action
439 Reproduction" in DESIGN, which describes an Open vSwitch change in
440 behavior in corner cases that may affect some controllers.
442 - A new test utility that can create L3 tunnel between two Open
443 vSwitches and detect connectivity issues.
445 - New --sort and --rsort options for "dump-flows" command.
446 - "mod-port" command can now control all OpenFlow config flags.
448 - Allow general bitwise masking for IPv4 and IPv6 addresses in
449 IPv4, IPv6, and ARP packets. (Previously, only CIDR masks
451 - Allow support for arbitrary Ethernet masks. (Previously, only
452 the multicast bit in the destination address could be individually
454 - New field OXM_OF_METADATA, to align with OpenFlow 1.1.
455 - The OFPST_QUEUE request now reports an error if a specified port or
456 queue does not exist, or for requests for a specific queue on all
457 ports, if the specified queue does not exist on any port. (Previous
458 versions generally reported an empty set of results.)
459 - New "flow monitor" feature to allow controllers to be notified of
460 flow table changes as they happen.
461 - Additional protocols are not mirrored and dropped when forward-bpdu is
462 false. For a full list, see the ovs-vswitchd.conf.db man page.
463 - Open vSwitch now sends RARP packets in situations where it previously
464 sent a custom protocol, making it consistent with behavior of QEMU and
466 - All Open vSwitch programs and log files now show timestamps in UTC,
467 instead the local timezone, by default.
471 ------------------------
472 - kernel modules are renamed. openvswitch_mod.ko is now
473 openvswitch.ko and brcompat_mod.ko is now brcompat.ko.
474 - Increased the number of NXM registers to 8.
475 - Added ability to configure DSCP setting for manager and controller
476 connections. By default, these connections have a DSCP value of
477 Internetwork Control (0xc0).
478 - Added the granular link health statistics, 'cfm_health', to an
481 - Added support to mask nd_target for ICMPv6 neighbor discovery flows.
482 - Added support for OpenFlow 1.3 port description (OFPMP_PORT_DESC)
485 - Added the "dump-ports-desc" command to retrieve port
486 information using the new port description multipart messages.
488 - Added support for spawning ovs-test server from the client.
489 - Now ovs-test is able to automatically create test bridges and ports.
490 - "ovs-dpctl dump-flows" now prints observed TCP flags in TCP flows.
491 - Tripled flow setup performance.
492 - The "coverage/log" command previously available through ovs-appctl
493 has been replaced by "coverage/show". The new command replies with
494 coverage counter values, instead of logging them.
498 ------------------------
499 - Allow OFPP_CONTROLLER as the in_port for packet-out messages.
503 ------------------------
504 *** Internal only release ***
506 - LACP bonds no longer fall back to balance-slb when negotiations fail.
507 Instead they drop traffic.
508 - The default bond_mode changed from SLB to active-backup, to protect
509 unsuspecting users from the significant risks of SLB bonds (which are
510 documented in vswitchd/INTERNALS).
511 - Load balancing can be disabled by setting the bond-rebalance-interval
514 - Added support for bitwise matching on TCP and UDP ports.
515 See ovs-ofctl(8) for more information.
516 - NXM flow dumps now include times elapsed toward idle and hard
518 - Added an OpenFlow extension NXT_SET_ASYNC_CONFIG that allows
519 controllers more precise control over which OpenFlow messages they
520 receive asynchronously.
521 - New "fin_timeout" action.
522 - Added "fin_timeout" support to "learn" action.
523 - New Nicira action NXAST_CONTROLLER that offers additional features
524 over output to OFPP_CONTROLLER.
525 - When QoS settings for an interface do not configure a default queue
526 (queue 0), Open vSwitch now uses a default configuration for that
527 queue, instead of dropping all packets as in previous versions.
529 - Logging to console and file will have UTC timestamp as a default for
530 all the daemons. An example of the default format is
531 2012-01-27T16:35:17Z. ovs-appctl can be used to change the default
533 - The syntax of commands and options to set log levels was simplified,
534 to make it easier to remember.
535 - New support for limiting the number of flows in an OpenFlow flow
536 table, with configurable policy for evicting flows upon
537 overflow. See the Flow_Table table in ovs-vswitch.conf.db(5)
538 for more information.
539 - New "enable-async-messages" column in the Controller table. If set to
540 false, OpenFlow connections to the controller will initially have all
541 asynchronous messages disabled, overriding normal OpenFlow behavior.
542 - ofproto-provider interface:
543 - "struct rule" has a new member "used" that ofproto implementations
544 should maintain by updating with ofproto_rule_update_used().
546 - The new option --timestamp causes the "monitor" command to print
547 a timestamp with every update.
548 - CFM module CCM broadcasts can now be tagged with an 802.1p priority.
552 ------------------------
554 - Added support for querying, modifying, and deleting flows
555 based on flow cookie when using NXM.
556 - Added new NXM_PACKET_IN format.
557 - Added new NXAST_DEC_TTL action.
559 - Added daemonization support to the monitor and snoop commands.
561 - The "find" command supports new set relational operators
562 {=}, {!=}, {<}, {>}, {<=}, and {>=}.
563 - ovsdb-tool now uses the typical database and schema installation
564 directories as defaults.
565 - The default MAC learning timeout has been increased from 60 seconds
566 to 300 seconds. The MAC learning timeout is now configurable.
570 ------------------------
571 - Compatible with Open vSwitch kernel module included in Linux 3.3.
572 - New "VLAN splinters" feature to work around buggy device drivers
573 in old Linux versions. (This feature is deprecated. When
574 broken device drivers are no longer in widespread use, we will
575 delete this feature.) See ovs-vswitchd.conf.db(5) for more
578 - Added ability to match on IPv6 flow label through NXM.
579 - Added ability to match on ECN bits in IPv4 and IPv6 through NXM.
580 - Added ability to match on TTL in IPv4 and IPv6 through NXM.
581 - Added ability to modify ECN bits in IPv4.
582 - Added ability to modify TTL in IPv4.
584 - Don't require the "normal" action to use mirrors. Traffic will
585 now be properly mirrored for any flows, regardless of their
587 - Track packet and byte statistics sent on mirrors.
588 - The sFlow implementation can now usually infer the correct agent
589 device instead of having to be told explicitly.
591 - New "fdb/flush" command to flush bridge's MAC learning table.
593 - A new distributed testing tool that allows one to diagnose performance
594 and connectivity issues. This tool currently is not included in RH or
596 - RHEL packaging now supports integration with Red Hat network scripts.
598 - Post 1.4.*, OVS will be changing the default bond mode from balance-slb
599 to active-backup. SLB bonds carry significant risks with them
600 (documented vswitchd/INTERNALS) which we want to prevent unsuspecting
601 users from running into. Users are advised to update any scripts or
602 configuration which may be negatively impacted by explicitly setting
603 the bond mode which they want to use.
607 ------------------------
609 - Added an OpenFlow extension which allows the "output" action to accept
611 - Added an OpenFlow extension for flexible learning.
612 - Bumped number of NXM registers from four to five.
614 - New "version" command to determine version of running daemon.
615 - If no argument is provided for "cfm/show", displays detailed
616 information about all interfaces with CFM enabled.
617 - If no argument is provided for "lacp/show", displays detailed
618 information about all ports with LACP enabled.
620 - New "set-if" command to modify a datapath port's configuration.
622 - The software switch now supports 255 OpenFlow tables, instead
623 of just one. By default, only table 0 is consulted, but the
624 new NXAST_RESUBMIT_TABLE action can look up in additional
625 tables. Tables 128 and above are reserved for use by the
626 switch itself; please use only tables 0 through 127.
627 - Add support for 802.1D spanning tree (STP).
628 - Fragment handling extensions:
629 - New OFPC_FRAG_NX_MATCH fragment handling mode, in which L4
630 fields are made available for matching in fragments with
632 - New NXM_NX_IP_FRAG match field for matching IP fragments (usable
633 via "ip_frag" in ovs-ofctl).
634 - New ovs-ofctl "get-frags" and "set-frags" commands to get and set
635 fragment handling policy.
636 - CAPWAP tunneling now supports an extension to transport a 64-bit key.
637 By default it remains compatible with the old version and other
638 standards-based implementations.
639 - Flow setups are now processed in a round-robin manner across ports
640 to prevent any single client from monopolizing the CPU and conducting
641 a denial of service attack.
642 - Added support for native VLAN tagging. A new "vlan_mode"
643 parameter can be set for "port". Possible values: "access",
644 "trunk", "native-tagged" and "native-untagged".
645 - test-openflowd has been removed. Please use ovs-vswitchd instead.
648 ------------------------
649 - New "ofproto" abstraction layer to ease porting to hardware
651 - Packaging for Red Hat Enterprise Linux 5.6 and 6.0.
652 - Datapath support for Linux kernels up to 3.0.
654 - New "bundle" and "bundle_load" action extensions.
656 - Implement table unique constraints.
657 - Support cooperative locking between callers.
659 - New "-s" option for "show" command prints packet and byte
660 counters for each port.
662 - New "--readd" option for "replace-flows".
664 - New "show" command to print an overview of configuration.
665 - New "comment" command to add remark that explains intentions.
666 - ovs-brcompatd has been rewritten to fix long-standing bugs.
667 - ovs-openflowd has been renamed test-openflowd and moved into the
668 tests directory. Its presence confused too many users. Please
669 use ovs-vswitchd instead.
670 - New ovs-benchmark utility to test flow setup performance.
671 - A new log level "off" has been added. Configuring a log facility
672 "off" prevents any messages from being logged to it. Previously,
673 "emer" was effectively "off" because no messages were ever logged at
674 level "emer". Now, errors that cause a process to exit are logged
676 - "configure" option --with-l26 has been renamed --with-linux, and
677 --with-l26-source has been renamed --with-linux-source. The old
678 names will be removed after the next release, so please update
680 - The "-2.6" suffix has been dropped from the datapath/linux-2.6 and
681 datapath/linux-2.6/compat-2.6 directories.
683 - Dropped support for "tun_id_from_cookie" OpenFlow extension.
684 Please use the extensible match extensions instead.
685 - Removed the Maintenance_Point and Monitor tables in an effort
686 to simplify 802.1ag configuration.
687 - Performance and scalability improvements
691 ------------------------
692 - Ability to define policies over IPv6
695 - Support for extensible match extensions to OpenFlow
697 - Support for HFSC qdisc.
698 - Queue used by in-band control can now be configured.
700 - Kernel<->userspace interface has been reworked and should be
701 close to a stable ABI now.
702 - "Port group" concept has been dropped.
703 - GRE over IPSEC tunnels
705 - New active backup bonding mode.
706 - New L4 hashing support when LACP is enabled.
707 - Source MAC hash now includes VLAN field also.
709 - Greatly improved handling of large flow tables
711 - "show" command now prints full vport configuration.
712 - "dump-groups" command removed since kernel support for
713 port groups was dropped.
715 - New commands for working with the new Managers table.
716 - "list" command enhanced with new formatting options and --columns
718 - "get" command now accepts new --id option.
719 - New "find" command.
721 - New "queue-stats" command for printing queue stats.
722 - New commands "replace-flows" and "diff-flows".
723 - Commands to add and remove flows can now read from files.
724 - New --flow-format option to enable or disable NXM.
725 - New --more option to increase OpenFlow message verbosity.
726 - Removed "tun-cookie" command, which is no longer useful.
727 - ovs-controller enhancements for testing various features.
728 - New ovs-vlan-test command for testing for Linux kernel driver VLAN
729 bugs. New ovs-vlan-bug-workaround command for enabling and
730 disabling a workaround for these driver bugs.
732 - "Resubmit" actions now update flow statistics.
733 - New "register" extension for use in matching and actions, via NXM.
734 - New "multipath" experimental action extension.
735 - New support for matching multicast Ethernet frames, via NXM.
736 - New extension for OpenFlow vendor error codes.
737 - New extension to set the QoS output queue without actually
738 sending to an output port.
739 - Open vSwitch now reports a single flow table, instead of
740 separate hash and wildcard tables. This better models the
741 current implementation.
742 - New experimental "note" action.
743 - New "ofproto/trace" ovs-appctl command and associated utilities
744 to ease debugging complex flow tables.
746 - Schema documentation now includes an entity-relationship diagram.
747 - The database is now garbage collected. In most tables,
748 unreferenced rows will be deleted automatically.
749 - Many tables now include statistics updated periodically by
750 ovs-vswitchd or ovsdb-server.
751 - Every table now has an "external-ids" column for use by OVS
753 - There is no default controller anymore. Each bridge must have its
754 controller individually specified.
755 - The "fail-mode" is now a property of a Bridge instead of a Controller.
756 - New versioning and checksum features.
757 - New Managers table and manager_options column in Open_vSwitch table
758 for specifying managers. The old "managers" column in the
759 Open_vSwitch table has been removed.
760 - Many "name" columns are now immutable.
762 - Dropped support for XenServer pre-5.6.100.
763 - Dropped support for Linux pre-2.6.18.
764 - Dropped controller discovery support.
765 - Dropped "ovs-ofctl status" and the OpenFlow extension that it used.
766 Statistics reporting in the database is a rough equivalent.
767 - Dropped the "corekeeper" package (now separate, at
768 http://openvswitch.org/cgi-bin/gitweb.cgi?p=corekeeper).
769 - Performance and scalability improvements
772 v1.1.0pre2 - 13 Sep 2010
773 ------------------------
776 v1.1.0pre1 - 31 Aug 2010
777 ------------------------
778 - OpenFlow 1.0 slicing (QoS) functionality
779 - Python bindings for configuration database (no write support)
780 - Performance and scalability improvements
785 - New "patch" interface type
790 - Configuration database with remote management
793 - Support for XenServer 5.5 and 5.6
794 - Performance and scalability improvements
797 v0.99.2 - 18 Feb 2010
798 ---------------------
801 v0.99.1 - 25 Jan 2010
802 ---------------------
803 - Add support for sFlow(R)
804 - Make headers compatible with C++
807 v0.99.0 - 14 Jan 2010
808 ---------------------
809 - User-space forwarding engine
812 v0.90.7 - 29 Nov 2009
813 ---------------------
814 - Add support for NetFlow active timeouts
821 v0.90.5 - 21 Sep 2009
822 ---------------------
823 - Generalize in-band control to more diverse network setups