3 - Utilities and daemons that support SSL now allow protocols and
4 ciphers to be configured with --ssl-protocols and --ssl-ciphers.
6 * QoS is now implemented via egress shaping rather than ingress policing.
7 * DSCP marking is now supported, via the new northbound QoS table.
8 * IPAM now supports fixed MAC addresses.
9 * Support for source IP address based routing.
10 - Fixed regression in table stats maintenance introduced in OVS
11 2.3.0, wherein the number of OpenFlow table hits and misses was
14 * OFPT_PACKET_OUT messages are now supported in bundles.
15 * A new "selection_method=dp_hash" type for OpenFlow select group
16 bucket selection that uses the datapath computed 5-tuple hash
17 without making datapath flows match the 5-tuple fields, which
18 is useful for more efficient load balancing, for example. This
19 uses the Netronome extension to OpenFlow 1.5+ that allows
20 control over the OpenFlow select groups selection method. See
21 "selection_method" and related options in ovs-ofctl(8) for
24 * 'bundle' command now supports packet-out messages.
25 * New syntax for 'ovs-ofctl packet-out' command, which uses the
26 same string parser as the 'bundle' command. The old 'packet-out'
27 syntax is deprecated and will be removed in a later OVS
29 * New unixctl "ofctl/packet-out" command, which can be used to
30 instruct a flow monitor to issue OpenFlow packet-out messages.
32 * Remote connections can now be made read-only (see ovsdb-server(1)).
34 * TLV mappings for protocols such as Geneve are now segregated on
35 a per-OpenFlow bridge basis rather than globally. (The interface
37 * Removed support for IPsec tunnels.
39 * New option 'n_rxq_desc' and 'n_txq_desc' fields for DPDK interfaces
40 which set the number of rx and tx descriptors to use for the given port.
42 * A package upgrade does not automatically restart OVS service.
46 - First supported release of OVN. See ovn-architecture(7) for more
49 * New "monitor_cond" "monitor_cond_update" and "update2" extensions to
52 * OpenFlow 1.3+ bundles now expire after 10 seconds since the
53 last time the bundle was either opened, modified, or closed.
54 * OpenFlow 1.3 Extension 230, adding OpenFlow Bundles support, is
56 * OpenFlow 1.3+ bundles are now supported for group mods as well as
57 flow mods and port mods. Both 'atomic' and 'ordered' bundle
58 flags are supported for group mods as well as flow mods.
59 * Internal OpenFlow rule representation for load and set-field
60 actions is now much more memory efficient. For a complex flow
61 table this can reduce rule memory consumption by 40%.
62 * Bundles are now much more memory efficient than in OVS 2.5.
63 Together with memory efficiency improvements in OpenFlow rule
64 representation, the peak OVS resident memory use during a
65 bundle commit for large complex set of flow mods can be only
66 25% of that in OVS 2.5 (4x lower).
67 * OpenFlow 1.1+ OFPT_QUEUE_GET_CONFIG_REQUEST now supports OFPP_ANY.
68 * OpenFlow 1.4+ OFPMP_QUEUE_DESC is now supported.
69 * OpenFlow 1.4+ OFPT_TABLE_STATUS is now supported.
70 * New property-based packet-in message format NXT_PACKET_IN2 with support
71 for arbitrary user-provided data and for serializing flow table
72 traversal into a continuation for later resumption.
73 * New extension message NXT_SET_ASYNC_CONFIG2 to allow OpenFlow 1.4-like
74 control over asynchronous messages in earlier versions of OpenFlow.
75 * New OpenFlow extension NXM_NX_MPLS_TTL to provide access to MPLS TTL.
76 * New output option, output(port=N,max_len=M), to allow truncating a
77 packet to size M bytes when outputting to port N.
78 * New command OFPGC_ADD_OR_MOD for OFPT_GROUP_MOD message that adds a
79 new group or modifies an existing groups
80 * The optional OpenFlow packet buffering feature is deprecated in
81 this release, and will be removed in the next OVS release
82 (2.7). After the change OVS always sends the 'buffer_id' as
83 0xffffffff in packet-in messages and will send an error
84 response if any other value of this field is included in
85 packet-out and flow mod sent by a controller. Controllers are
86 already expected to work properly in cases where the switch can
87 not buffer packets, so this change should not affect existing
89 * New OpenFlow extension NXT_CT_FLUSH_ZONE to flush conntrack zones.
90 - Improved OpenFlow version compatibility for actions:
91 * New OpenFlow extension to support the "group" action in OpenFlow 1.0.
92 * OpenFlow 1.0 "enqueue" action now properly translated to OpenFlow 1.1+.
93 * OpenFlow 1.1 "mod_nw_ecn" and OpenFlow 1.1+ "mod_nw_ttl" actions now
94 properly translated to OpenFlow 1.0.
96 * queue-get-config command now allows a queue ID to be specified.
97 * '--bundle' option can now be used with OpenFlow 1.3 and with group mods.
98 * New "bundle" command allows executing a mixture of flow and group mods
99 as a single atomic transaction.
100 * New option "--color" to produce colorized output for some commands.
101 * New option '--may-create' to use OFPGC_ADD_OR_MOD in mod-group command.
103 * New "sampling_port" option for "sample" action to allow sampling
104 ingress and egress tunnel metadata with IPFIX.
105 * New ovs-ofctl commands "dump-ipfix-bridge" and "dump-ipfix-flow" to
106 dump bridge IPFIX statistics and flow based IPFIX statistics.
107 * New setting other-config:virtual_obs_id to add an arbitrary string
110 * OVS Linux datapath now implements Conntrack NAT action with all
111 supported Linux kernels.
112 * Support for truncate action.
113 * New QoS type "linux-noop" that prevents Open vSwitch from trying to
114 manage QoS for a given port (useful when other software manages QoS).
116 * New option "n_rxq" for PMD interfaces.
117 Old 'other_config:n-dpdk-rxqs' is no longer supported.
118 Not supported by vHost interfaces. For them number of rx and tx queues
119 is applied from connected virtio device.
120 * New 'other_config:pmd-rxq-affinity' field for PMD interfaces, that
121 allows to pin port's rx queues to desired cores.
122 * New appctl command 'dpif-netdev/pmd-rxq-show' to check the port/rxq
124 * Type of log messages from PMD threads changed from INFO to DBG.
125 * QoS functionality with sample egress-policer implementation.
126 * The mechanism for configuring DPDK has changed to use database
127 * Sensible defaults have been introduced for many of the required
128 configuration options
129 * DB entries have been added for many of the DPDK EAL command line
130 arguments. Additional arguments can be passed via the dpdk-extra
132 * Add ingress policing functionality.
133 * PMD threads servicing vHost User ports can now come from the NUMA
134 node that device memory is located on if CONFIG_RTE_LIBRTE_VHOST_NUMA
136 * Basic connection tracking for the userspace datapath (no ALG,
137 fragmentation or NAT support yet)
138 * Support for DPDK 16.07
139 * Optional support for DPDK pdump enabled.
140 * Jumbo frame support
141 * Remove dpdkvhostcuse port type.
142 * OVS client mode for vHost and vHost reconnect (Requires QEMU 2.7)
143 * 'dpdkvhostuserclient' port type.
144 - Increase number of registers to 16.
145 - ovs-benchmark: This utility has been removed due to lack of use and
148 * New "vlog/close" command.
150 * Added the ability to selectively start the forwarding and database
151 functions (ovs-vswitchd and ovsdb-server, respectively).
153 * Remove max number of sessions limit, to enable connection scaling
156 * Added support for Python 3.4+ in addition to existing support
159 * Introduced SELinux policy package.
160 - Datapath Linux kernel compatibility.
161 * Dropped support for kernel older than 3.10.
162 * Removed VLAN splinters feature.
163 * Datapath supports kernel upto 4.7.
165 * Flow based tunnel match and action can be used for IPv6 address using
166 tun_ipv6_src, tun_ipv6_dst fields.
167 * Added support for IPv6 tunnels, for details checkout FAQ.
168 * Deprecated support for IPsec tunnels ports.
169 - A wrapper script, 'ovs-tcpdump', to easily port-mirror an OVS port and
171 - Introduce --no-self-confinement flag that allows daemons to work with
172 sockets outside their run directory.
173 - ovs-pki: Changed message digest algorithm from SHA-1 to SHA-512 because
174 SHA-1 is no longer secure and some operating systems have started to
175 disable it in OpenSSL.
176 - Add 'mtu_request' column to the Interface table. It can be used to
177 configure the MTU of the ports.
180 - Using openvswitch module in conjunction with upstream Linux tunnels:
181 * When using the openvswitch module distributed with OVS against kernel
182 versions 4.4 to 4.6, the openvswitch module cannot be loaded or used at
183 the same time as "ip_gre".
184 - Conntrack FTP ALGs: When using the openvswitch module distributed with
185 OVS, particular Linux distribution kernels versions may provide diminished
186 functionality. This typically affects active FTP data connections when
187 using "actions=ct(alg=ftp),..." in flow tables. Specifically:
188 * Centos 7.1 kernels (3.10.0-2xx) kernels are unable to correctly set
189 up expectations for FTP data connections in multiple zones,
190 eg "actions=ct(zone=1,alg=ftp),ct(zone=2,alg=ftp),...". Executing the
191 "ct" action for subsequent data connections may fail to determine that
192 the data connection is "related" to an existing connection.
193 * Centos 7.2 kernels (3.10.0-3xx) kernels may not establish FTP ALG state
194 correctly for NATed connections. As a result, flows that perform NAT,
195 eg "actions=ct(nat,ftp=alg,table=1),..." may fail to NAT the packet,
196 and will populate the "ct_state=inv" bit in the flow.
200 ---------------------
201 - Dropped support for Python older than version 2.7. As a consequence,
202 using Open vSwitch 2.5 or later on XenServer 6.5 or earlier (which
203 have Python 2.4) requires first installing Python 2.7.
205 * Group chaining (where one OpenFlow group triggers another) is
207 * OpenFlow 1.4+ "importance" is now considered for flow eviction.
208 * OpenFlow 1.4+ OFPTC_EVICTION is now implemented.
209 * OpenFlow 1.4+ OFPTC_VACANCY_EVENTS is now implemented.
210 * OpenFlow 1.4+ OFPMP_TABLE_DESC is now implemented.
211 * Allow modifying the ICMPv4/ICMPv6 type and code fields.
212 * OpenFlow 1.4+ OFPT_SET_ASYNC_CONFIG and OFPT_GET_ASYNC_CONFIG are
215 * New "out_group" keyword for OpenFlow 1.1+ matching on output group.
217 * Geneve tunnels can now match and set options and the OAM bit.
218 * The nonstandard GRE64 tunnel extension has been dropped.
219 - Support Multicast Listener Discovery (MLDv1 and MLDv2).
220 - Add 'symmetric_l3l4' and 'symmetric_l3l4+udp' hash functions.
221 - sFlow agent now reports tunnel and MPLS structures.
222 - New 'check-system-userspace', 'check-kmod' and 'check-kernel' Makefile
223 targets to run a new system testsuite. These tests can be run inside
224 a Vagrant box. See INSTALL.md for details
225 - Mark --syslog-target argument as deprecated. It will be removed in
226 the next OVS release.
227 - Added --user option to all daemons
228 - Add support for connection tracking through the new "ct" action
229 and "ct_state"/"ct_zone"/"ct_mark"/"ct_label" match fields. Only
230 available on Linux kernels with the connection tracking module loaded.
231 - Add experimental version of OVN. OVN, the Open Virtual Network, is a
232 system to support virtual network abstraction. OVN complements the
233 existing capabilities of OVS to add native support for virtual network
234 abstractions, such as virtual L2 and L3 overlays and security groups.
236 * DPDK ports may now be created via network scripts (see README.RHEL).
239 * Added multiqueue support to vhost-user
240 * Note: QEMU 2.5+ required for multiqueue support
243 ---------------------
244 - Flow table modifications are now atomic, meaning that each packet
245 now sees a coherent version of the OpenFlow pipeline. For
246 example, if a controller removes all flows with a single OpenFlow
247 "flow_mod", no packet sees an intermediate version of the OpenFlow
248 pipeline where only some of the flows have been deleted.
249 - Added support for SFQ, FQ_CoDel and CoDel qdiscs.
250 - Add bash command-line completion support for ovs-vsctl Please check
251 utilities/ovs-command-compgen.INSTALL.md for how to use.
252 - The MAC learning feature now includes per-port fairness to mitigate
253 MAC flooding attacks.
254 - New support for a "conjunctive match" OpenFlow extension, which
255 allows constructing OpenFlow matches of the form "field1 in
256 {a,b,c...} AND field2 in {d,e,f...}" and generalizations. For details,
257 see documentation for the "conjunction" action in ovs-ofctl(8).
258 - Add bash command-line completion support for ovs-appctl/ovs-dpctl/
259 ovs-ofctl/ovsdb-tool commands. Please check
260 utilities/ovs-command-compgen.INSTALL.md for how to use.
261 - The "learn" action supports a new flag "delete_learned" that causes
262 the learned flows to be deleted when the flow with the "learn" action
264 - Basic support for the Geneve tunneling protocol. It is not yet
265 possible to generate or match options. This is planned for a future
266 release. The protocol is documented at
267 http://tools.ietf.org/html/draft-gross-geneve-00
268 - The OVS database now reports controller rate limiting statistics.
269 - sflow now exports information about LACP-based bonds, port names, and
270 OpenFlow port numbers, as well as datapath performance counters.
271 - ovs-dpctl functionality is now available for datapaths integrated
272 into ovs-vswitchd, via ovs-appctl. Some existing ovs-appctl
273 commands are now redundant and will be removed in a future
274 release. See ovs-vswitchd(8) for details.
276 * OpenFlow 1.4 bundles are now supported for flow mods and port
277 mods. For flow mods, both 'atomic' and 'ordered' bundle flags
278 are trivially supported, as all bundled messages are executed
279 in the order they were added and all flow table modifications
280 are now atomic to the datapath. Port mods may not appear in
281 atomic bundles, as port status modifications are not atomic.
282 * IPv6 flow label and neighbor discovery fields are now modifiable.
283 * OpenFlow 1.5 extended registers are now supported.
284 * The OpenFlow 1.5 actset_output field is now supported.
285 * OpenFlow 1.5 Copy-Field action is now supported.
286 * OpenFlow 1.5 masked Set-Field action is now supported.
287 * OpenFlow 1.3+ table features requests are now supported (read-only).
288 * Nicira extension "move" actions may now be included in action sets.
289 * "resubmit" actions may now be included in action sets. The resubmit
290 is executed last, and only if the action set has no "output" or "group"
292 * OpenFlow 1.4+ flow "importance" is now maintained in the flow table.
293 * A new Netronome extension to OpenFlow 1.5+ allows control over the
294 fields hashed for OpenFlow select groups. See "selection_method" and
295 related options in ovs-ofctl(8) for details.
296 - ovs-ofctl has a new '--bundle' option that makes the flow mod commands
297 ('add-flow', 'add-flows', 'mod-flows', 'del-flows', and 'replace-flows')
298 use an OpenFlow 1.4 bundle to operate the modifications as a single
299 atomic transaction. If any of the flow mods in a transaction fail, none
300 of them are executed. All flow mods in a bundle appear to datapath
301 lookups simultaneously.
302 - ovs-ofctl 'add-flow' and 'add-flows' commands now accept arbitrary flow
303 mods as an input by allowing the flow specification to start with an
304 explicit 'add', 'modify', 'modify_strict', 'delete', or 'delete_strict'
305 keyword. A missing keyword is treated as 'add', so this is fully
306 backwards compatible. With the new '--bundle' option all the flow mods
307 are executed as a single atomic transaction using an OpenFlow 1.4 bundle.
308 - ovs-pki: Changed message digest algorithm from MD5 to SHA-1 because
309 MD5 is no longer secure and some operating systems have started to disable
311 - ovsdb-server: New OVSDB protocol extension allows inequality tests on
312 "optional scalar" columns. See ovsdb-server(1) for details.
313 - ovs-vsctl now permits immutable columns in a new row to be modified in
314 the same transaction that creates the row.
315 - test-controller has been renamed ovs-testcontroller at request of users
316 who find it useful for testing basic OpenFlow setups. It is still not
317 a necessary or desirable part of most Open vSwitch deployments.
318 - Support for travis-ci.org based continuous integration builds has been
319 added. Build failures are reported to build@openvswitch.org. See INSTALL.md
320 file for additional details.
321 - Support for the Rapid Spanning Tree Protocol (IEEE 802.1D-2004).
322 The implementation has been tested successfully against the Ixia Automated
323 Network Validation Library (ANVL).
324 - Stats are no longer updated on fake bond interface.
325 - Keep active bond slave selection across OVS restart.
326 - A simple wrapper script, 'ovs-docker', to integrate OVS with Docker
327 containers. If and when there is a native integration of Open vSwitch
328 with Docker, the wrapper script will be retired.
329 - Added support for DPDK Tunneling. VXLAN, GRE, and Geneve are supported
330 protocols. This is generic tunneling mechanism for userspace datapath.
331 - Support for multicast snooping (IGMPv1, IGMPv2 and IGMPv3)
332 - Support for Linux kernels up to 4.0.x
333 - The documentation now use the term 'destination' to mean one of syslog,
334 console or file for vlog logging instead of the previously used term
336 - Support for VXLAN Group Policy extension
337 - Initial support for the IETF Auto-Attach SPBM draft standard. This
338 contains rudimentary support for the LLDP protocol as needed for
340 - The default OpenFlow and OVSDB ports are now the IANA-assigned
341 numbers. OpenFlow is 6653 and OVSDB is 6640.
342 - Support for DPDK vHost.
343 - Support for outer UDP checksums in Geneve and VXLAN.
344 - The kernel vports with dependencies are no longer part of the overall
345 openvswitch.ko but built and loaded automatically as individual kernel
346 modules (vport-*.ko).
347 - Support for STT tunneling.
348 - ovs-sim: New developer tool for simulating multiple OVS instances.
349 See ovs-sim(1) for more information.
350 - Support to configure method (--syslog-method argument) that determines
351 how daemons will talk with syslog.
352 - Support for "ovs-appctl vlog/list-pattern" command that lets to query
353 logging message format for each destination.
357 ---------------------
358 - OpenFlow 1.1, 1.2, and 1.3 are now enabled by default in
360 - Linux kernel datapath now has an exact match cache optimizing the
361 flow matching process.
362 - Datapath flows now have partially wildcarded tranport port field
363 matches. This reduces userspace upcalls, but increases the
364 number of different masks in the datapath. The kernel datapath
365 exact match cache removes the overhead of matching the incoming
366 packets with the larger number of masks, but when paired with an
367 older kernel module, some workloads may perform worse with the
369 - Compatibility with autoconf 2.63 (previously >=2.64)
371 v2.2.0 - Internal Release
372 ---------------------
373 - Internal ports are no longer brought up by default, because it
374 should be an administrator task to bring up devices as they are
376 - ovs-vsctl now reports when ovs-vswitchd fails to create a new port or
378 - Port creation and configuration errors are now stored in a new error
379 column of the Interface table and included in 'ovs-vsctl show'.
380 - The "ovsdbmonitor" graphical tool has been removed, because it was
381 poorly maintained and not widely used.
382 - New "check-ryu" Makefile target for running Ryu tests for OpenFlow
383 controllers against Open vSwitch. See INSTALL.md for details.
384 - Added IPFIX support for SCTP flows and templates for ICMPv4/v6 flows.
385 - Upon the receipt of a SIGHUP signal, ovs-vswitchd no longer reopens its
386 log file (it will terminate instead). Please use 'ovs-appctl vlog/reopen'
388 - Support for Linux kernels up to 3.14. From Kernel 3.12 onwards OVS uses
389 tunnel API for GRE and VXLAN.
390 - Added DPDK support.
391 - Added support for custom vlog patterns in Python
395 ---------------------
396 - Address prefix tracking support for flow tables. New columns
397 "prefixes" in OVS-DB table "Flow_Table" controls which packet
398 header fields are used for address prefix tracking. Prefix
399 tracking allows the classifier to skip rules with longer than
400 necessary prefixes, resulting in better wildcarding for datapath
401 flows. Default configuration is to not use any fields for prefix
402 tracking. However, if any flow tables contain both exact matches
403 and masked matches for IP address fields, OVS performance may be
404 increased by using this feature.
405 * As of now, the fields for which prefix lookup can be enabled
406 are: 'tun_id', 'tun_src', 'tun_dst', 'nw_src', 'nw_dst' (or
407 aliases 'ip_src' and 'ip_dst'), 'ipv6_src', and 'ipv6_dst'.
408 (Using this feature for 'tun_id' would only make sense if the
409 tunnel IDs have prefix structure similar to IP addresses.)
410 * There is a maximum number of fields that can be enabled for any
411 one flow table. Currently this limit is 3.
413 $ ovs-vsctl set Bridge br0 flow_tables:0=@N1 -- \
414 --id=@N1 create Flow_Table name=table0
415 $ ovs-vsctl set Bridge br0 flow_tables:1=@N1 -- \
416 --id=@N1 create Flow_Table name=table1
417 $ ovs-vsctl set Flow_Table table0 prefixes=ip_dst,ip_src
418 $ ovs-vsctl set Flow_Table table1 prefixes=[]
419 - TCP flags matching: OVS now supports matching of TCP flags. This
420 has an adverse performance impact when using OVS userspace 1.10
421 or older (no megaflows support) together with the new OVS kernel
422 module. It is recommended that the kernel and userspace modules
423 both are upgraded at the same time.
424 - The default OpenFlow and OVSDB ports will change to
425 IANA-assigned numbers in a future release. Consider updating
426 your installations to specify port numbers instead of using the
429 * The OpenFlow 1.1+ "Write-Actions" instruction is now supported.
430 * OVS limits the OpenFlow port numbers it assigns to port 32767 and
431 below, leaving port numbers above that range free for assignment
433 * ovs-vswitchd now honors changes to the "ofport_request" column
434 in the Interface table by changing the port's OpenFlow port
436 * The Open vSwitch software switch now supports OpenFlow groups.
437 - ovs-vswitchd.conf.db.5 man page will contain graphviz/dot
438 diagram only if graphviz package was installed at the build time.
439 - Support for Linux kernels up to 3.11
441 The "show" command also displays mega flow mask stats.
443 * New command "ofp-parse-pcap" to dump OpenFlow from PCAP files.
444 - ovs-controller has been renamed test-controller. It is no longer
445 packaged or installed by default, because too many users assumed
446 incorrectly that ovs-controller was a necessary or desirable part
447 of an Open vSwitch deployment.
448 - Added vlog option to export to a UDP syslog sink.
450 * The "monitor" command can now monitor all tables in a database,
451 instead of being limited to a single table.
452 - The flow-eviction-threshold has been replaced by the flow-limit which is a
453 hard limit on the number of flows in the datapath. It defaults to 200,000
454 flows. OVS automatically adjusts this number depending on network
456 - Added IPv6 support for active and passive socket communications.
460 ---------------------
461 - The ovs-vswitchd process is no longer single-threaded. Multiple
462 threads are now used to handle flow set up and asynchronous
465 * Experimental support for OpenFlow 1.1 (in addition to 1.2 and
466 1.3, which had experimental support in 1.10).
467 * Experimental protocol support for OpenFlow 1.1+ groups. This
468 does not yet include an implementation in the Open vSwitch
470 * Experimental protocol support for OpenFlow 1.2+ meters. This
471 does not yet include an implementation in the Open vSwitch
473 * New support for matching outer source and destination IP address
474 of tunneled packets, for tunnel ports configured with the newly
475 added "remote_ip=flow" and "local_ip=flow" options.
476 * Support for matching on metadata 'pkt_mark' for interacting with
477 other system components. On Linux this corresponds to the skb
479 * Support matching, rewriting SCTP ports
480 - The Interface table in the database has a new "ifindex" column to
481 report the interface's OS-assigned ifindex.
482 - New "check-oftest" Makefile target for running OFTest against Open
483 vSwitch. See README-OFTest for details.
484 - The flow eviction threshold has been moved to the Open_vSwitch table.
485 - Database names are now mandatory when specifying ovsdb-server options
486 through database paths (e.g. Private key option with the database name
487 should look like "--private-key=db:Open_vSwitch,SSL,private_key").
488 - Added ovs-dev.py, a utility script helpful for Open vSwitch developers.
489 - Support for Linux kernels up to 3.10
491 * New "ofp-parse" for printing OpenFlow messages read from a file.
492 * New commands for OpenFlow 1.1+ groups.
493 - Added configurable flow caching support to IPFIX exporter.
494 - Dropped support for Linux pre-2.6.32.
495 - Log file timestamps and ovsdb commit timestamps are now reported
496 with millisecond resolution. (Previous versions only reported
500 v1.11.0 - 28 Aug 2013
501 ---------------------
502 - Support for megaflows, which allows wildcarding in the kernel (and
503 any dpif implementation that supports wildcards). Depending on
504 the flow table and switch configuration, flow set up rates are
505 close to the Linux bridge.
506 - The "tutorial" directory contains a new tutorial for some advanced
507 Open vSwitch features.
508 - Stable bond mode has been removed.
509 - The autopath action has been removed.
510 - New support for the data encapsulation format of the LISP tunnel
511 protocol (RFC 6830). An external control plane or manual flow
512 setup is required for EID-to-RLOC mapping.
514 * The "dec_mpls_ttl" and "set_mpls_ttl" actions from OpenFlow
515 1.1 and later are now implemented.
516 * New "stack" extension for use in actions, to push and pop from
518 * The "load" and "set_field" actions can now modify the "in_port". (This
519 allows one to enable output to a flow's input port by setting the
520 in_port to some unused value, such as OFPP_NONE.)
522 * New debugging commands "add-flow", "mod-flow", "del-flow".
523 * "dump-flows" now has a -m option to increase output verbosity.
524 - In dpif-based bridges, cache action translations, which can improve
525 flow set up performance by 80% with a complicated flow table.
526 - New syslog format, prefixed with "ovs|", to be easier to filter.
527 - RHEL: Removes the default firewall rule that allowed GRE traffic to
528 pass through. Any users that relied on this automatic firewall hole
529 will have to manually configure it. The ovs-ctl(8) manpage documents
530 the "enable-protocol" command that can be used as an alternative.
531 - New CFM demand mode which uses data traffic to indicate interface
534 v1.10.0 - 01 May 2013
535 ---------------------
536 - Bridge compatibility support has been removed. Any uses that
537 rely on ovs-brcompatd will have to stick with Open vSwitch 1.9.x
538 or adapt to native Open vSwitch support (e.g. use ovs-vsctl instead
540 - The maximum size of the MAC learning table is now configurable.
541 - With the Linux datapath, packets for new flows are now queued
542 separately on a per-port basis, so it should no longer be
543 possible for a large number of new flows arriving on one port to
544 prevent new flows from being processed on other ports.
546 * Previously ovs-vsctl would retry connecting to the database forever,
547 causing it to hang if ovsdb-server was not running. Now, ovs-vsctl
548 only tries once by default (use --retry to try forever). This change
549 means that you may want to remove uses of --timeout to avoid hangs
551 * Many "ovs-vsctl" database commands now accept an --if-exists option.
552 Please refer to the ovs-vsctl manpage for details.
554 - Experimental support for newer versions of OpenFlow. See
555 the "What versions of OpenFlow does Open vSwitch support?"
556 question in the FAQ for more details.
557 - The OpenFlow "dp_desc" may now be configured by setting the
558 value of other-config:dp-desc in the Bridge table.
559 - It is possible to request the OpenFlow port number with the
560 "ofport_request" column in the Interface table.
561 - The NXM flow_removed message now reports the OpenFlow table ID
562 from which the flow was removed.
564 - New support for the VXLAN tunnel protocol (see the IETF draft here:
565 http://tools.ietf.org/html/draft-mahalingam-dutt-dcops-vxlan-03).
566 - Tunneling requires the version of the kernel module paired with
567 Open vSwitch 1.9.0 or later.
568 - Inheritance of the Don't Fragment bit in IP tunnels (df_inherit)
569 is no longer supported.
570 - Path MTU discovery is no longer supported.
571 - CAPWAP tunneling support removed.
572 - Tunnels with multicast destination ports are no longer supported.
574 - The "dump-flows" and "del-flows" no longer require an argument
575 if only one datapath exists.
577 - New "vlog/disable-rate-limit" and "vlog/enable-rate-limit"
578 commands available allow control over logging rate limits.
579 - New "dpif/dump-dps", "dpif/show", and "dpif/dump-flows" command
580 that mimic the equivalent ovs-dpctl commands.
581 - The ofproto library is now responsible for assigning OpenFlow port
582 numbers. An ofproto implementation should assign them when
583 port_construct() is called.
584 - All dpif-based bridges of a particular type share a common
585 datapath called "ovs-<type>", e.g. "ovs-system". The ovs-dpctl
586 commands will now return information on that shared datapath. To
587 get the equivalent bridge-specific information, use the new
588 "ovs-appctl dpif/*" commands.
589 - Backward-incompatible changes:
590 - Earlier Open vSwitch versions treated ANY as a wildcard in flow
591 syntax. OpenFlow 1.1 adds a port named ANY, which introduces a
592 conflict. ANY was rarely used in flow syntax, so we chose to
593 retire that meaning of ANY in favor of the OpenFlow 1.1 meaning.
594 - Patch ports no longer require kernel support, so they now work
595 with FreeBSD and the kernel module built into Linux 3.3 and later.
596 - New "sample" action.
600 ------------------------
602 - Support for ipv6 set action.
603 - SKB mark matching and setting.
604 - support for Linux kernels up to 3.8
605 - FreeBSD is now a supported platform, thanks to code contributions from
606 Gaetano Catalli, Ed Maste, and Giuseppe Lettieri.
607 - ovs-bugtool: New --ovs option to report only OVS related information.
608 - New %t and %T log escapes to identify the subprogram within a
609 cooperating group of processes or threads that emitted a log message.
610 The default log patterns now include this information.
612 - Allow bitwise masking for SHA and THA fields in ARP, SLL and TLL
613 fields in IPv6 neighbor discovery messages, and IPv6 flow label.
614 - Adds support for writing to the metadata field for a flow.
616 - The tunneling code no longer assumes input and output keys are
617 symmetric. If they are not, PMTUD needs to be disabled for
618 tunneling to work. Note this only applies to flow-based keys.
619 - New support for a nonstandard form of GRE that supports a 64-bit key.
620 - Tunnel Path MTU Discovery default value was set to 'disabled'.
621 This feature is deprecated and will be removed soon.
622 - Tunnel header caching removed.
624 - Commands and actions that accept port numbers now also accept keywords
625 that represent those ports (such as LOCAL, NONE, and ALL). This is
626 also the recommended way to specify these ports, for compatibility
627 with OpenFlow 1.1 and later (which use the OpenFlow 1.0 numbers
628 for these ports for different purposes).
630 - Support requesting the port number with the "port_no" option in
631 the "add-if" command.
632 - ovs-pki: The "online PKI" features have been removed, along with
633 the ovs-pki-cgi program that facilitated it, because of some
634 alarmist insecurity claims. We do not believe that these claims
635 are true, but because we do not know of any users for this
636 feature it seems better on balance to remove it. (The ovs-pki-cgi
637 program was not included in distribution packaging.)
638 - ovsdb-server now enforces the immutability of immutable columns. This
639 was not enforced in earlier versions due to an oversight.
640 - The following features are now deprecated. They will be removed no
641 earlier than February 2013. Please email dev@openvswitch.org with
643 - Bridge compatibility.
645 - The autopath action.
646 - Interface type "null".
647 - Numeric values for reserved ports (see "ovs-ofctl" note above).
648 - Tunnel Path MTU Discovery.
649 - CAPWAP tunnel support.
650 - The data in the RARP packets can now be matched in the same way as the
655 ------------------------
656 *** Internal only release ***
657 - New FAQ. Please send updates and additions!
658 - Authors of controllers, please read the new section titled "Action
659 Reproduction" in DESIGN, which describes an Open vSwitch change in
660 behavior in corner cases that may affect some controllers.
662 - A new test utility that can create L3 tunnel between two Open
663 vSwitches and detect connectivity issues.
665 - New --sort and --rsort options for "dump-flows" command.
666 - "mod-port" command can now control all OpenFlow config flags.
668 - Allow general bitwise masking for IPv4 and IPv6 addresses in
669 IPv4, IPv6, and ARP packets. (Previously, only CIDR masks
671 - Allow support for arbitrary Ethernet masks. (Previously, only
672 the multicast bit in the destination address could be individually
674 - New field OXM_OF_METADATA, to align with OpenFlow 1.1.
675 - The OFPST_QUEUE request now reports an error if a specified port or
676 queue does not exist, or for requests for a specific queue on all
677 ports, if the specified queue does not exist on any port. (Previous
678 versions generally reported an empty set of results.)
679 - New "flow monitor" feature to allow controllers to be notified of
680 flow table changes as they happen.
681 - Additional protocols are not mirrored and dropped when forward-bpdu is
682 false. For a full list, see the ovs-vswitchd.conf.db man page.
683 - Open vSwitch now sends RARP packets in situations where it previously
684 sent a custom protocol, making it consistent with behavior of QEMU and
686 - All Open vSwitch programs and log files now show timestamps in UTC,
687 instead the local timezone, by default.
691 ------------------------
692 - kernel modules are renamed. openvswitch_mod.ko is now
693 openvswitch.ko and brcompat_mod.ko is now brcompat.ko.
694 - Increased the number of NXM registers to 8.
695 - Added ability to configure DSCP setting for manager and controller
696 connections. By default, these connections have a DSCP value of
697 Internetwork Control (0xc0).
698 - Added the granular link health statistics, 'cfm_health', to an
701 - Added support to mask nd_target for ICMPv6 neighbor discovery flows.
702 - Added support for OpenFlow 1.3 port description (OFPMP_PORT_DESC)
705 - Added the "dump-ports-desc" command to retrieve port
706 information using the new port description multipart messages.
708 - Added support for spawning ovs-test server from the client.
709 - Now ovs-test is able to automatically create test bridges and ports.
710 - "ovs-dpctl dump-flows" now prints observed TCP flags in TCP flows.
711 - Tripled flow setup performance.
712 - The "coverage/log" command previously available through ovs-appctl
713 has been replaced by "coverage/show". The new command replies with
714 coverage counter values, instead of logging them.
718 ------------------------
719 - Allow OFPP_CONTROLLER as the in_port for packet-out messages.
723 ------------------------
724 *** Internal only release ***
726 - LACP bonds no longer fall back to balance-slb when negotiations fail.
727 Instead they drop traffic.
728 - The default bond_mode changed from SLB to active-backup, to protect
729 unsuspecting users from the significant risks of SLB bonds (which are
730 documented in vswitchd/INTERNALS).
731 - Load balancing can be disabled by setting the bond-rebalance-interval
734 - Added support for bitwise matching on TCP and UDP ports.
735 See ovs-ofctl(8) for more information.
736 - NXM flow dumps now include times elapsed toward idle and hard
738 - Added an OpenFlow extension NXT_SET_ASYNC_CONFIG that allows
739 controllers more precise control over which OpenFlow messages they
740 receive asynchronously.
741 - New "fin_timeout" action.
742 - Added "fin_timeout" support to "learn" action.
743 - New Nicira action NXAST_CONTROLLER that offers additional features
744 over output to OFPP_CONTROLLER.
745 - When QoS settings for an interface do not configure a default queue
746 (queue 0), Open vSwitch now uses a default configuration for that
747 queue, instead of dropping all packets as in previous versions.
749 - Logging to console and file will have UTC timestamp as a default for
750 all the daemons. An example of the default format is
751 2012-01-27T16:35:17Z. ovs-appctl can be used to change the default
753 - The syntax of commands and options to set log levels was simplified,
754 to make it easier to remember.
755 - New support for limiting the number of flows in an OpenFlow flow
756 table, with configurable policy for evicting flows upon
757 overflow. See the Flow_Table table in ovs-vswitch.conf.db(5)
758 for more information.
759 - New "enable-async-messages" column in the Controller table. If set to
760 false, OpenFlow connections to the controller will initially have all
761 asynchronous messages disabled, overriding normal OpenFlow behavior.
762 - ofproto-provider interface:
763 - "struct rule" has a new member "used" that ofproto implementations
764 should maintain by updating with ofproto_rule_update_used().
766 - The new option --timestamp causes the "monitor" command to print
767 a timestamp with every update.
768 - CFM module CCM broadcasts can now be tagged with an 802.1p priority.
772 ------------------------
774 - Added support for querying, modifying, and deleting flows
775 based on flow cookie when using NXM.
776 - Added new NXM_PACKET_IN format.
777 - Added new NXAST_DEC_TTL action.
779 - Added daemonization support to the monitor and snoop commands.
781 - The "find" command supports new set relational operators
782 {=}, {!=}, {<}, {>}, {<=}, and {>=}.
783 - ovsdb-tool now uses the typical database and schema installation
784 directories as defaults.
785 - The default MAC learning timeout has been increased from 60 seconds
786 to 300 seconds. The MAC learning timeout is now configurable.
790 ------------------------
791 - Compatible with Open vSwitch kernel module included in Linux 3.3.
792 - New "VLAN splinters" feature to work around buggy device drivers
793 in old Linux versions. (This feature is deprecated. When
794 broken device drivers are no longer in widespread use, we will
795 delete this feature.) See ovs-vswitchd.conf.db(5) for more
798 - Added ability to match on IPv6 flow label through NXM.
799 - Added ability to match on ECN bits in IPv4 and IPv6 through NXM.
800 - Added ability to match on TTL in IPv4 and IPv6 through NXM.
801 - Added ability to modify ECN bits in IPv4.
802 - Added ability to modify TTL in IPv4.
804 - Don't require the "normal" action to use mirrors. Traffic will
805 now be properly mirrored for any flows, regardless of their
807 - Track packet and byte statistics sent on mirrors.
808 - The sFlow implementation can now usually infer the correct agent
809 device instead of having to be told explicitly.
811 - New "fdb/flush" command to flush bridge's MAC learning table.
813 - A new distributed testing tool that allows one to diagnose performance
814 and connectivity issues. This tool currently is not included in RH or
816 - RHEL packaging now supports integration with Red Hat network scripts.
818 - Post 1.4.*, OVS will be changing the default bond mode from balance-slb
819 to active-backup. SLB bonds carry significant risks with them
820 (documented vswitchd/INTERNALS) which we want to prevent unsuspecting
821 users from running into. Users are advised to update any scripts or
822 configuration which may be negatively impacted by explicitly setting
823 the bond mode which they want to use.
827 ------------------------
829 - Added an OpenFlow extension which allows the "output" action to accept
831 - Added an OpenFlow extension for flexible learning.
832 - Bumped number of NXM registers from four to five.
834 - New "version" command to determine version of running daemon.
835 - If no argument is provided for "cfm/show", displays detailed
836 information about all interfaces with CFM enabled.
837 - If no argument is provided for "lacp/show", displays detailed
838 information about all ports with LACP enabled.
840 - New "set-if" command to modify a datapath port's configuration.
842 - The software switch now supports 255 OpenFlow tables, instead
843 of just one. By default, only table 0 is consulted, but the
844 new NXAST_RESUBMIT_TABLE action can look up in additional
845 tables. Tables 128 and above are reserved for use by the
846 switch itself; please use only tables 0 through 127.
847 - Add support for 802.1D spanning tree (STP).
848 - Fragment handling extensions:
849 - New OFPC_FRAG_NX_MATCH fragment handling mode, in which L4
850 fields are made available for matching in fragments with
852 - New NXM_NX_IP_FRAG match field for matching IP fragments (usable
853 via "ip_frag" in ovs-ofctl).
854 - New ovs-ofctl "get-frags" and "set-frags" commands to get and set
855 fragment handling policy.
856 - CAPWAP tunneling now supports an extension to transport a 64-bit key.
857 By default it remains compatible with the old version and other
858 standards-based implementations.
859 - Flow setups are now processed in a round-robin manner across ports
860 to prevent any single client from monopolizing the CPU and conducting
861 a denial of service attack.
862 - Added support for native VLAN tagging. A new "vlan_mode"
863 parameter can be set for "port". Possible values: "access",
864 "trunk", "native-tagged" and "native-untagged".
865 - test-openflowd has been removed. Please use ovs-vswitchd instead.
868 ------------------------
869 - New "ofproto" abstraction layer to ease porting to hardware
871 - Packaging for Red Hat Enterprise Linux 5.6 and 6.0.
872 - Datapath support for Linux kernels up to 3.0.
874 - New "bundle" and "bundle_load" action extensions.
876 - Implement table unique constraints.
877 - Support cooperative locking between callers.
879 - New "-s" option for "show" command prints packet and byte
880 counters for each port.
882 - New "--readd" option for "replace-flows".
884 - New "show" command to print an overview of configuration.
885 - New "comment" command to add remark that explains intentions.
886 - ovs-brcompatd has been rewritten to fix long-standing bugs.
887 - ovs-openflowd has been renamed test-openflowd and moved into the
888 tests directory. Its presence confused too many users. Please
889 use ovs-vswitchd instead.
890 - New ovs-benchmark utility to test flow setup performance.
891 - A new log level "off" has been added. Configuring a log facility
892 "off" prevents any messages from being logged to it. Previously,
893 "emer" was effectively "off" because no messages were ever logged at
894 level "emer". Now, errors that cause a process to exit are logged
896 - "configure" option --with-l26 has been renamed --with-linux, and
897 --with-l26-source has been renamed --with-linux-source. The old
898 names will be removed after the next release, so please update
900 - The "-2.6" suffix has been dropped from the datapath/linux-2.6 and
901 datapath/linux-2.6/compat-2.6 directories.
903 - Dropped support for "tun_id_from_cookie" OpenFlow extension.
904 Please use the extensible match extensions instead.
905 - Removed the Maintenance_Point and Monitor tables in an effort
906 to simplify 802.1ag configuration.
907 - Performance and scalability improvements
911 ------------------------
912 - Ability to define policies over IPv6
915 - Support for extensible match extensions to OpenFlow
917 - Support for HFSC qdisc.
918 - Queue used by in-band control can now be configured.
920 - Kernel<->userspace interface has been reworked and should be
921 close to a stable ABI now.
922 - "Port group" concept has been dropped.
923 - GRE over IPSEC tunnels
925 - New active backup bonding mode.
926 - New L4 hashing support when LACP is enabled.
927 - Source MAC hash now includes VLAN field also.
929 - Greatly improved handling of large flow tables
931 - "show" command now prints full vport configuration.
932 - "dump-groups" command removed since kernel support for
933 port groups was dropped.
935 - New commands for working with the new Managers table.
936 - "list" command enhanced with new formatting options and --columns
938 - "get" command now accepts new --id option.
939 - New "find" command.
941 - New "queue-stats" command for printing queue stats.
942 - New commands "replace-flows" and "diff-flows".
943 - Commands to add and remove flows can now read from files.
944 - New --flow-format option to enable or disable NXM.
945 - New --more option to increase OpenFlow message verbosity.
946 - Removed "tun-cookie" command, which is no longer useful.
947 - ovs-controller enhancements for testing various features.
948 - New ovs-vlan-test command for testing for Linux kernel driver VLAN
949 bugs. New ovs-vlan-bug-workaround command for enabling and
950 disabling a workaround for these driver bugs.
952 - "Resubmit" actions now update flow statistics.
953 - New "register" extension for use in matching and actions, via NXM.
954 - New "multipath" experimental action extension.
955 - New support for matching multicast Ethernet frames, via NXM.
956 - New extension for OpenFlow vendor error codes.
957 - New extension to set the QoS output queue without actually
958 sending to an output port.
959 - Open vSwitch now reports a single flow table, instead of
960 separate hash and wildcard tables. This better models the
961 current implementation.
962 - New experimental "note" action.
963 - New "ofproto/trace" ovs-appctl command and associated utilities
964 to ease debugging complex flow tables.
966 - Schema documentation now includes an entity-relationship diagram.
967 - The database is now garbage collected. In most tables,
968 unreferenced rows will be deleted automatically.
969 - Many tables now include statistics updated periodically by
970 ovs-vswitchd or ovsdb-server.
971 - Every table now has an "external-ids" column for use by OVS
973 - There is no default controller anymore. Each bridge must have its
974 controller individually specified.
975 - The "fail-mode" is now a property of a Bridge instead of a Controller.
976 - New versioning and checksum features.
977 - New Managers table and manager_options column in Open_vSwitch table
978 for specifying managers. The old "managers" column in the
979 Open_vSwitch table has been removed.
980 - Many "name" columns are now immutable.
982 - Dropped support for XenServer pre-5.6.100.
983 - Dropped support for Linux pre-2.6.18.
984 - Dropped controller discovery support.
985 - Dropped "ovs-ofctl status" and the OpenFlow extension that it used.
986 Statistics reporting in the database is a rough equivalent.
987 - Dropped the "corekeeper" package (now separate, at
988 http://openvswitch.org/cgi-bin/gitweb.cgi?p=corekeeper).
989 - Performance and scalability improvements
992 v1.1.0pre2 - 13 Sep 2010
993 ------------------------
996 v1.1.0pre1 - 31 Aug 2010
997 ------------------------
998 - OpenFlow 1.0 slicing (QoS) functionality
999 - Python bindings for configuration database (no write support)
1000 - Performance and scalability improvements
1003 v1.0.1 - 31 May 2010
1004 --------------------
1005 - New "patch" interface type
1008 v1.0.0 - 15 May 2010
1009 --------------------
1010 - Configuration database with remote management
1013 - Support for XenServer 5.5 and 5.6
1014 - Performance and scalability improvements
1017 v0.99.2 - 18 Feb 2010
1018 ---------------------
1021 v0.99.1 - 25 Jan 2010
1022 ---------------------
1023 - Add support for sFlow(R)
1024 - Make headers compatible with C++
1027 v0.99.0 - 14 Jan 2010
1028 ---------------------
1029 - User-space forwarding engine
1032 v0.90.7 - 29 Nov 2009
1033 ---------------------
1034 - Add support for NetFlow active timeouts
1037 v0.90.6 - 6 Oct 2009
1038 --------------------
1041 v0.90.5 - 21 Sep 2009
1042 ---------------------
1043 - Generalize in-band control to more diverse network setups
projects / ovs.git / blob