3 - TCP flags matching: OVS now supports matching of TCP flags. This
4 has an adverse performance impact when using OVS userspace 1.10
5 or older (no megaflows support) together with the new OVS kernel
6 module. It is recommended that the kernel and userspace modules
7 both are upgraded at the same time.
8 - The default OpenFlow and OVSDB ports will change to
9 IANA-assigned numbers in a future release. Consider updating
10 your installations to specify port numbers instead of using the
13 * The OpenFlow 1.1+ "Write-Actions" instruction is now supported.
14 * OVS limits the OpenFlow port numbers it assigns to port 32767 and
15 below, leaving port numbers above that range free for assignment
17 - ovs-vswitchd.conf.db.5 man page will contain graphviz/dot
18 diagram only if graphviz package was installed at the build time.
19 - Support for Linux kernels up to 3.11
21 The "show" command also displays mega flow mask stats.
22 - ovs-controller has been renamed test-controller. It is no longer
23 packaged or installed by default, because too many users assumed
24 incorrectly that ovs-controller was a necessary or desirable part
25 of an Open vSwitch deployment.
30 - The ovs-vswitchd process is no longer single-threaded. Multiple
31 threads are now used to handle flow set up and asynchronous
34 * Experimental support for OpenFlow 1.1 (in addition to 1.2 and
35 1.3, which had experimental support in 1.10).
36 * Experimental protocol support for OpenFlow 1.1+ groups. This
37 does not yet include an implementation in the Open vSwitch
39 * Experimental protocol support for OpenFlow 1.2+ meters. This
40 does not yet include an implementation in the Open vSwitch
42 * New support for matching outer source and destination IP address
43 of tunneled packets, for tunnel ports configured with the newly
44 added "remote_ip=flow" and "local_ip=flow" options.
45 * Support for matching on metadata 'pkt_mark' for interacting with
46 other system components. On Linux this corresponds to the skb
48 * Support matching, rewriting SCTP ports
49 - The Interface table in the database has a new "ifindex" column to
50 report the interface's OS-assigned ifindex.
51 - New "check-oftest" Makefile target for running OFTest against Open
52 vSwitch. See README-OFTest for details.
53 - The flow eviction threshold has been moved to the Open_vSwitch table.
54 - Database names are now mandatory when specifying ovsdb-server options
55 through database paths (e.g. Private key option with the database name
56 should look like "--private-key=db:Open_vSwitch,SSL,private_key").
57 - Added ovs-dev.py, a utility script helpful for Open vSwitch developers.
58 - Support for Linux kernels up to 3.10
60 * New "ofp-parse" for printing OpenFlow messages read from a file.
61 * New commands for OpenFlow 1.1+ groups.
62 - Added configurable flow caching support to IPFIX exporter.
63 - Dropped support for Linux pre-2.6.32.
64 - Log file timestamps and ovsdb commit timestamps are now reported
65 with millisecond resolution. (Previous versions only reported
71 - Support for megaflows, which allows wildcarding in the kernel (and
72 any dpif implementation that supports wildcards). Depending on
73 the flow table and switch configuration, flow set up rates are
74 close to the Linux bridge.
75 - The "tutorial" directory contains a new tutorial for some advanced
76 Open vSwitch features.
77 - Stable bond mode has been removed.
78 - The autopath action has been removed.
79 - New support for the data encapsulation format of the LISP tunnel
80 protocol (RFC 6830). An external control plane or manual flow
81 setup is required for EID-to-RLOC mapping.
83 * The "dec_mpls_ttl" and "set_mpls_ttl" actions from OpenFlow
84 1.1 and later are now implemented.
85 * New "stack" extension for use in actions, to push and pop from
87 * The "load" and "set_field" actions can now modify the "in_port". (This
88 allows one to enable output to a flow's input port by setting the
89 in_port to some unused value, such as OFPP_NONE.)
91 * New debugging commands "add-flow", "mod-flow", "del-flow".
92 * "dump-flows" now has a -m option to increase output verbosity.
93 - In dpif-based bridges, cache action translations, which can improve
94 flow set up performance by 80% with a complicated flow table.
95 - New syslog format, prefixed with "ovs|", to be easier to filter.
96 - RHEL: Removes the default firewall rule that allowed GRE traffic to
97 pass through. Any users that relied on this automatic firewall hole
98 will have to manually configure it. The ovs-ctl(8) manpage documents
99 the "enable-protocol" command that can be used as an alternative.
100 - New CFM demand mode which uses data traffic to indicate interface
103 v1.10.0 - 01 May 2013
104 ---------------------
105 - Bridge compatibility support has been removed. Any uses that
106 rely on ovs-brcompatd will have to stick with Open vSwitch 1.9.x
107 or adapt to native Open vSwitch support (e.g. use ovs-vsctl instead
109 - The maximum size of the MAC learning table is now configurable.
110 - With the Linux datapath, packets for new flows are now queued
111 separately on a per-port basis, so it should no longer be
112 possible for a large number of new flows arriving on one port to
113 prevent new flows from being processed on other ports.
115 * Previously ovs-vsctl would retry connecting to the database forever,
116 causing it to hang if ovsdb-server was not running. Now, ovs-vsctl
117 only tries once by default (use --retry to try forever). This change
118 means that you may want to remove uses of --timeout to avoid hangs
120 * Many "ovs-vsctl" database commands now accept an --if-exists option.
121 Please refer to the ovs-vsctl manpage for details.
123 - Experimental support for newer versions of OpenFlow. See
124 the "What versions of OpenFlow does Open vSwitch support?"
125 question in the FAQ for more details.
126 - The OpenFlow "dp_desc" may now be configured by setting the
127 value of other-config:dp-desc in the Bridge table.
128 - It is possible to request the OpenFlow port number with the
129 "ofport_request" column in the Interface table.
130 - The NXM flow_removed message now reports the OpenFlow table ID
131 from which the flow was removed.
133 - New support for the VXLAN tunnel protocol (see the IETF draft here:
134 http://tools.ietf.org/html/draft-mahalingam-dutt-dcops-vxlan-03).
135 - Tunneling requires the version of the kernel module paired with
136 Open vSwitch 1.9.0 or later.
137 - Inheritance of the Don't Fragment bit in IP tunnels (df_inherit)
138 is no longer supported.
139 - Path MTU discovery is no longer supported.
140 - CAPWAP tunneling support removed.
141 - Tunnels with multicast destination ports are no longer supported.
143 - The "dump-flows" and "del-flows" no longer require an argument
144 if only one datapath exists.
146 - New "vlog/disable-rate-limit" and "vlog/enable-rate-limit"
147 commands available allow control over logging rate limits.
148 - New "dpif/dump-dps", "dpif/show", and "dpif/dump-flows" command
149 that mimic the equivalent ovs-dpctl commands.
150 - The ofproto library is now responsible for assigning OpenFlow port
151 numbers. An ofproto implementation should assign them when
152 port_construct() is called.
153 - All dpif-based bridges of a particular type share a common
154 datapath called "ovs-<type>", e.g. "ovs-system". The ovs-dpctl
155 commands will now return information on that shared datapath. To
156 get the equivalent bridge-specific information, use the new
157 "ovs-appctl dpif/*" commands.
158 - Backward-incompatible changes:
159 - Earlier Open vSwitch versions treated ANY as a wildcard in flow
160 syntax. OpenFlow 1.1 adds a port named ANY, which introduces a
161 conflict. ANY was rarely used in flow syntax, so we chose to
162 retire that meaning of ANY in favor of the OpenFlow 1.1 meaning.
163 - Patch ports no longer require kernel support, so they now work
164 with FreeBSD and the kernel module built into Linux 3.3 and later.
165 - New "sample" action.
169 ------------------------
171 - Support for ipv6 set action.
172 - SKB mark matching and setting.
173 - support for Linux kernels up to 3.8
174 - FreeBSD is now a supported platform, thanks to code contributions from
175 Gaetano Catalli, Ed Maste, and Giuseppe Lettieri.
176 - ovs-bugtool: New --ovs option to report only OVS related information.
177 - New %t and %T log escapes to identify the subprogram within a
178 cooperating group of processes or threads that emitted a log message.
179 The default log patterns now include this information.
181 - Allow bitwise masking for SHA and THA fields in ARP, SLL and TLL
182 fields in IPv6 neighbor discovery messages, and IPv6 flow label.
183 - Adds support for writing to the metadata field for a flow.
185 - The tunneling code no longer assumes input and output keys are
186 symmetric. If they are not, PMTUD needs to be disabled for
187 tunneling to work. Note this only applies to flow-based keys.
188 - New support for a nonstandard form of GRE that supports a 64-bit key.
189 - Tunnel Path MTU Discovery default value was set to 'disabled'.
190 This feature is deprecated and will be removed soon.
191 - Tunnel header caching removed.
193 - Commands and actions that accept port numbers now also accept keywords
194 that represent those ports (such as LOCAL, NONE, and ALL). This is
195 also the recommended way to specify these ports, for compatibility
196 with OpenFlow 1.1 and later (which use the OpenFlow 1.0 numbers
197 for these ports for different purposes).
199 - Support requesting the port number with the "port_no" option in
200 the "add-if" command.
201 - ovs-pki: The "online PKI" features have been removed, along with
202 the ovs-pki-cgi program that facilitated it, because of some
203 alarmist insecurity claims. We do not believe that these claims
204 are true, but because we do not know of any users for this
205 feature it seems better on balance to remove it. (The ovs-pki-cgi
206 program was not included in distribution packaging.)
207 - ovsdb-server now enforces the immutability of immutable columns. This
208 was not enforced in earlier versions due to an oversight.
209 - The following features are now deprecated. They will be removed no
210 earlier than February 2013. Please email dev@openvswitch.org with
212 - Bridge compatibility.
214 - The autopath action.
215 - Interface type "null".
216 - Numeric values for reserved ports (see "ovs-ofctl" note above).
217 - Tunnel Path MTU Discovery.
218 - CAPWAP tunnel support.
219 - The data in the RARP packets can now be matched in the same way as the
224 ------------------------
225 *** Internal only release ***
226 - New FAQ. Please send updates and additions!
227 - Authors of controllers, please read the new section titled "Action
228 Reproduction" in DESIGN, which describes an Open vSwitch change in
229 behavior in corner cases that may affect some controllers.
231 - A new test utility that can create L3 tunnel between two Open
232 vSwitches and detect connectivity issues.
234 - New --sort and --rsort options for "dump-flows" command.
235 - "mod-port" command can now control all OpenFlow config flags.
237 - Allow general bitwise masking for IPv4 and IPv6 addresses in
238 IPv4, IPv6, and ARP packets. (Previously, only CIDR masks
240 - Allow support for arbitrary Ethernet masks. (Previously, only
241 the multicast bit in the destination address could be individually
243 - New field OXM_OF_METADATA, to align with OpenFlow 1.1.
244 - The OFPST_QUEUE request now reports an error if a specified port or
245 queue does not exist, or for requests for a specific queue on all
246 ports, if the specified queue does not exist on any port. (Previous
247 versions generally reported an empty set of results.)
248 - New "flow monitor" feature to allow controllers to be notified of
249 flow table changes as they happen.
250 - Additional protocols are not mirrored and dropped when forward-bpdu is
251 false. For a full list, see the ovs-vswitchd.conf.db man page.
252 - Open vSwitch now sends RARP packets in situations where it previously
253 sent a custom protocol, making it consistent with behavior of QEMU and
255 - All Open vSwitch programs and log files now show timestamps in UTC,
256 instead the local timezone, by default.
260 ------------------------
261 - kernel modules are renamed. openvswitch_mod.ko is now
262 openvswitch.ko and brcompat_mod.ko is now brcompat.ko.
263 - Increased the number of NXM registers to 8.
264 - Added ability to configure DSCP setting for manager and controller
265 connections. By default, these connections have a DSCP value of
266 Internetwork Control (0xc0).
267 - Added the granular link health statistics, 'cfm_health', to an
270 - Added support to mask nd_target for ICMPv6 neighbor discovery flows.
271 - Added support for OpenFlow 1.3 port description (OFPMP_PORT_DESC)
274 - Added the "dump-ports-desc" command to retrieve port
275 information using the new port description multipart messages.
277 - Added support for spawning ovs-test server from the client.
278 - Now ovs-test is able to automatically create test bridges and ports.
279 - "ovs-dpctl dump-flows" now prints observed TCP flags in TCP flows.
280 - Tripled flow setup performance.
281 - The "coverage/log" command previously available through ovs-appctl
282 has been replaced by "coverage/show". The new command replies with
283 coverage counter values, instead of logging them.
287 ------------------------
288 - Allow OFPP_CONTROLLER as the in_port for packet-out messages.
292 ------------------------
293 *** Internal only release ***
295 - LACP bonds no longer fall back to balance-slb when negotiations fail.
296 Instead they drop traffic.
297 - The default bond_mode changed from SLB to active-backup, to protect
298 unsuspecting users from the significant risks of SLB bonds (which are
299 documented in vswitchd/INTERNALS).
300 - Load balancing can be disabled by setting the bond-rebalance-interval
303 - Added support for bitwise matching on TCP and UDP ports.
304 See ovs-ofctl(8) for more information.
305 - NXM flow dumps now include times elapsed toward idle and hard
307 - Added an OpenFlow extension NXT_SET_ASYNC_CONFIG that allows
308 controllers more precise control over which OpenFlow messages they
309 receive asynchronously.
310 - New "fin_timeout" action.
311 - Added "fin_timeout" support to "learn" action.
312 - New Nicira action NXAST_CONTROLLER that offers additional features
313 over output to OFPP_CONTROLLER.
314 - When QoS settings for an interface do not configure a default queue
315 (queue 0), Open vSwitch now uses a default configuration for that
316 queue, instead of dropping all packets as in previous versions.
318 - Logging to console and file will have UTC timestamp as a default for
319 all the daemons. An example of the default format is
320 2012-01-27T16:35:17Z. ovs-appctl can be used to change the default
322 - The syntax of commands and options to set log levels was simplified,
323 to make it easier to remember.
324 - New support for limiting the number of flows in an OpenFlow flow
325 table, with configurable policy for evicting flows upon
326 overflow. See the Flow_Table table in ovs-vswitch.conf.db(5)
327 for more information.
328 - New "enable-async-messages" column in the Controller table. If set to
329 false, OpenFlow connections to the controller will initially have all
330 asynchronous messages disabled, overriding normal OpenFlow behavior.
331 - ofproto-provider interface:
332 - "struct rule" has a new member "used" that ofproto implementations
333 should maintain by updating with ofproto_rule_update_used().
335 - The new option --timestamp causes the "monitor" command to print
336 a timestamp with every update.
337 - CFM module CCM broadcasts can now be tagged with an 802.1p priority.
341 ------------------------
343 - Added support for querying, modifying, and deleting flows
344 based on flow cookie when using NXM.
345 - Added new NXM_PACKET_IN format.
346 - Added new NXAST_DEC_TTL action.
348 - Added daemonization support to the monitor and snoop commands.
350 - The "find" command supports new set relational operators
351 {=}, {!=}, {<}, {>}, {<=}, and {>=}.
352 - ovsdb-tool now uses the typical database and schema installation
353 directories as defaults.
354 - The default MAC learning timeout has been increased from 60 seconds
355 to 300 seconds. The MAC learning timeout is now configurable.
359 ------------------------
360 - Compatible with Open vSwitch kernel module included in Linux 3.3.
361 - New "VLAN splinters" feature to work around buggy device drivers
362 in old Linux versions. (This feature is deprecated. When
363 broken device drivers are no longer in widespread use, we will
364 delete this feature.) See ovs-vswitchd.conf.db(5) for more
367 - Added ability to match on IPv6 flow label through NXM.
368 - Added ability to match on ECN bits in IPv4 and IPv6 through NXM.
369 - Added ability to match on TTL in IPv4 and IPv6 through NXM.
370 - Added ability to modify ECN bits in IPv4.
371 - Added ability to modify TTL in IPv4.
373 - Don't require the "normal" action to use mirrors. Traffic will
374 now be properly mirrored for any flows, regardless of their
376 - Track packet and byte statistics sent on mirrors.
377 - The sFlow implementation can now usually infer the correct agent
378 device instead of having to be told explicitly.
380 - New "fdb/flush" command to flush bridge's MAC learning table.
382 - A new distributed testing tool that allows one to diagnose performance
383 and connectivity issues. This tool currently is not included in RH or
385 - RHEL packaging now supports integration with Red Hat network scripts.
387 - Post 1.4.*, OVS will be changing the default bond mode from balance-slb
388 to active-backup. SLB bonds carry significant risks with them
389 (documented vswitchd/INTERNALS) which we want to prevent unsuspecting
390 users from running into. Users are advised to update any scripts or
391 configuration which may be negatively impacted by explicitly setting
392 the bond mode which they want to use.
396 ------------------------
398 - Added an OpenFlow extension which allows the "output" action to accept
400 - Added an OpenFlow extension for flexible learning.
401 - Bumped number of NXM registers from four to five.
403 - New "version" command to determine version of running daemon.
404 - If no argument is provided for "cfm/show", displays detailed
405 information about all interfaces with CFM enabled.
406 - If no argument is provided for "lacp/show", displays detailed
407 information about all ports with LACP enabled.
409 - New "set-if" command to modify a datapath port's configuration.
411 - The software switch now supports 255 OpenFlow tables, instead
412 of just one. By default, only table 0 is consulted, but the
413 new NXAST_RESUBMIT_TABLE action can look up in additional
414 tables. Tables 128 and above are reserved for use by the
415 switch itself; please use only tables 0 through 127.
416 - Add support for 802.1D spanning tree (STP).
417 - Fragment handling extensions:
418 - New OFPC_FRAG_NX_MATCH fragment handling mode, in which L4
419 fields are made available for matching in fragments with
421 - New NXM_NX_IP_FRAG match field for matching IP fragments (usable
422 via "ip_frag" in ovs-ofctl).
423 - New ovs-ofctl "get-frags" and "set-frags" commands to get and set
424 fragment handling policy.
425 - CAPWAP tunneling now supports an extension to transport a 64-bit key.
426 By default it remains compatible with the old version and other
427 standards-based implementations.
428 - Flow setups are now processed in a round-robin manner across ports
429 to prevent any single client from monopolizing the CPU and conducting
430 a denial of service attack.
431 - Added support for native VLAN tagging. A new "vlan_mode"
432 parameter can be set for "port". Possible values: "access",
433 "trunk", "native-tagged" and "native-untagged".
434 - test-openflowd has been removed. Please use ovs-vswitchd instead.
437 ------------------------
438 - New "ofproto" abstraction layer to ease porting to hardware
440 - Packaging for Red Hat Enterprise Linux 5.6 and 6.0.
441 - Datapath support for Linux kernels up to 3.0.
443 - New "bundle" and "bundle_load" action extensions.
445 - Implement table unique constraints.
446 - Support cooperative locking between callers.
448 - New "-s" option for "show" command prints packet and byte
449 counters for each port.
451 - New "--readd" option for "replace-flows".
453 - New "show" command to print an overview of configuration.
454 - New "comment" command to add remark that explains intentions.
455 - ovs-brcompatd has been rewritten to fix long-standing bugs.
456 - ovs-openflowd has been renamed test-openflowd and moved into the
457 tests directory. Its presence confused too many users. Please
458 use ovs-vswitchd instead.
459 - New ovs-benchmark utility to test flow setup performance.
460 - A new log level "off" has been added. Configuring a log facility
461 "off" prevents any messages from being logged to it. Previously,
462 "emer" was effectively "off" because no messages were ever logged at
463 level "emer". Now, errors that cause a process to exit are logged
465 - "configure" option --with-l26 has been renamed --with-linux, and
466 --with-l26-source has been renamed --with-linux-source. The old
467 names will be removed after the next release, so please update
469 - The "-2.6" suffix has been dropped from the datapath/linux-2.6 and
470 datapath/linux-2.6/compat-2.6 directories.
472 - Dropped support for "tun_id_from_cookie" OpenFlow extension.
473 Please use the extensible match extensions instead.
474 - Removed the Maintenance_Point and Monitor tables in an effort
475 to simplify 802.1ag configuration.
476 - Performance and scalability improvements
480 ------------------------
481 - Ability to define policies over IPv6
484 - Support for extensible match extensions to OpenFlow
486 - Support for HFSC qdisc.
487 - Queue used by in-band control can now be configured.
489 - Kernel<->userspace interface has been reworked and should be
490 close to a stable ABI now.
491 - "Port group" concept has been dropped.
492 - GRE over IPSEC tunnels
494 - New active backup bonding mode.
495 - New L4 hashing support when LACP is enabled.
496 - Source MAC hash now includes VLAN field also.
498 - Greatly improved handling of large flow tables
500 - "show" command now prints full vport configuration.
501 - "dump-groups" command removed since kernel support for
502 port groups was dropped.
504 - New commands for working with the new Managers table.
505 - "list" command enhanced with new formatting options and --columns
507 - "get" command now accepts new --id option.
508 - New "find" command.
510 - New "queue-stats" command for printing queue stats.
511 - New commands "replace-flows" and "diff-flows".
512 - Commands to add and remove flows can now read from files.
513 - New --flow-format option to enable or disable NXM.
514 - New --more option to increase OpenFlow message verbosity.
515 - Removed "tun-cookie" command, which is no longer useful.
516 - ovs-controller enhancements for testing various features.
517 - New ovs-vlan-test command for testing for Linux kernel driver VLAN
518 bugs. New ovs-vlan-bug-workaround command for enabling and
519 disabling a workaround for these driver bugs.
521 - "Resubmit" actions now update flow statistics.
522 - New "register" extension for use in matching and actions, via NXM.
523 - New "multipath" experimental action extension.
524 - New support for matching multicast Ethernet frames, via NXM.
525 - New extension for OpenFlow vendor error codes.
526 - New extension to set the QoS output queue without actually
527 sending to an output port.
528 - Open vSwitch now reports a single flow table, instead of
529 separate hash and wildcard tables. This better models the
530 current implementation.
531 - New experimental "note" action.
532 - New "ofproto/trace" ovs-appctl command and associated utilities
533 to ease debugging complex flow tables.
535 - Schema documentation now includes an entity-relationship diagram.
536 - The database is now garbage collected. In most tables,
537 unreferenced rows will be deleted automatically.
538 - Many tables now include statistics updated periodically by
539 ovs-vswitchd or ovsdb-server.
540 - Every table now has an "external-ids" column for use by OVS
542 - There is no default controller anymore. Each bridge must have its
543 controller individually specified.
544 - The "fail-mode" is now a property of a Bridge instead of a Controller.
545 - New versioning and checksum features.
546 - New Managers table and manager_options column in Open_vSwitch table
547 for specifying managers. The old "managers" column in the
548 Open_vSwitch table has been removed.
549 - Many "name" columns are now immutable.
551 - Dropped support for XenServer pre-5.6.100.
552 - Dropped support for Linux pre-2.6.18.
553 - Dropped controller discovery support.
554 - Dropped "ovs-ofctl status" and the OpenFlow extension that it used.
555 Statistics reporting in the database is a rough equivalent.
556 - Dropped the "corekeeper" package (now separate, at
557 http://openvswitch.org/cgi-bin/gitweb.cgi?p=corekeeper).
558 - Performance and scalability improvements
561 v1.1.0pre2 - 13 Sep 2010
562 ------------------------
565 v1.1.0pre1 - 31 Aug 2010
566 ------------------------
567 - OpenFlow 1.0 slicing (QoS) functionality
568 - Python bindings for configuration database (no write support)
569 - Performance and scalability improvements
574 - New "patch" interface type
579 - Configuration database with remote management
582 - Support for XenServer 5.5 and 5.6
583 - Performance and scalability improvements
586 v0.99.2 - 18 Feb 2010
587 ---------------------
590 v0.99.1 - 25 Jan 2010
591 ---------------------
592 - Add support for sFlow(R)
593 - Make headers compatible with C++
596 v0.99.0 - 14 Jan 2010
597 ---------------------
598 - User-space forwarding engine
601 v0.90.7 - 29 Nov 2009
602 ---------------------
603 - Add support for NetFlow active timeouts
610 v0.90.5 - 21 Sep 2009
611 ---------------------
612 - Generalize in-band control to more diverse network setups
projects / mirror_ovs.git / blob