post-v1.9.0 -------------------- - The maximum size of the MAC learning table is now configurable. - New support for the VXLAN tunnel protocol (see the IETF draft here: http://tools.ietf.org/html/draft-mahalingam-dutt-dcops-vxlan-02). - With the Linux datapath, packets for new flows are now queued separately on a per-port basis, so it should no longer be possible for a large number of new flows arriving on one port to prevent new flows from being processed on other ports. - New "vlog/disable-rate-limit" and "vlog/enable-rate-limit" commands available through ovs-appctl allow control over logging rate limits. - The OpenFlow "dp_desc" may now be configured by setting the value of other-config:dp-desc in the Bridge table. - Path MTU discovery is no longer supported. - Backward-incompatible changes: - Earlier Open vSwitch versions treated ANY as a wildcard in flow syntax. OpenFlow 1.1 adds a port named ANY, which introduces a conflict. ANY was rarely used in flow syntax, so we chose to retire that meaning of ANY in favor of the OpenFlow 1.1 meaning. v1.9.0 - xx xxx xxxx -------------------- - The tunneling code no longer assumes input and output keys are symmetric. If they are not, PMTUD needs to be disabled for tunneling to work. Note this only applies to flow-based keys. - Datapath: - Support for ipv6 set action. - SKB mark matching and setting. - support for Linux kernels up to 3.7 - FreeBSD is now a supported platform, thanks to code contributions from Gaetano Catalli, Ed Maste, and Giuseppe Lettieri. - ovs-bugtool: New --ovs option to report only OVS related information. - New %t and %T log escapes to identify the subprogram within a cooperating group of processes or threads that emitted a log message. The default log patterns now include this information. - OpenFlow: - Allow bitwise masking for SHA and THA fields in ARP, SLL and TLL fields in IPv6 neighbor discovery messages, and IPv6 flow label. - Adds support for writing to the metadata field for a flow. - It is possible to request the OpenFlow port number with the "ofport_request" column in the Interface table. - ovs-ofctl: - Commands and actions that accept port numbers now also accept keywords that represent those ports (such as LOCAL, NONE, and ALL). This is also the recommended way to specify these ports, for compatibility with OpenFlow 1.1 and later (which use the OpenFlow 1.0 numbers for these ports for different purposes). - ovs-dpctl: - Support requesting the port number with the "port_no" option in the "add-if" command. - The "dump-flows" and "del-flows" no longer require an argument if only one datapath exists. - ovs-appctl: - New "dpif/dump-dps", "dpif/show", and "dpif/dump-flows" command that mimic the equivalent ovs-dpctl commands. - ovs-pki: The "online PKI" features have been removed, along with the ovs-pki-cgi program that facilitated it, because of some alarmist insecurity claims. We do not believe that these claims are true, but because we do not know of any users for this feature it seems better on balance to remove it. (The ovs-pki-cgi program was not included in distribution packaging.) - Tunnel Path MTU Discovery default value was set to 'disabled'. This feature is deprecated and will be removed soon. - ovsdb-server now enforces the immutability of immutable columns. This was not enforced in earlier versions due to an oversight. - New support for a nonstandard form of GRE that supports a 64-bit key. - The ofproto library is now responsible for assigning OpenFlow port numbers. An ofproto implementation should assign them when port_construct() is called. - All dpif-based bridges of a particular type share a common datapath called "ovs-", e.g. "ovs-system". The ovs-dpctl commands will now return information on that shared datapath. To get the equivalent bridge-specific information, use the new "ovs-appctl dpif/*" commands. - Tunnel header caching removed. - The following features are now deprecated. They will be removed no earlier than February 2013. Please email dev@openvswitch.org with concerns. - Bridge compatibility. - Stable bond mode. - The autopath action. - Interface type "null". - Numeric values for reserved ports (see "ovs-ofctl" note above). - Tunnel Path MTU Discovery. - CAPWAP tunnel support. - The data in the RARP packets can now be matched in the same way as the data in ARP packets. v1.8.0 - xx xxx xxxx ------------------------ - New FAQ. Please send updates and additions! - Authors of controllers, please read the new section titled "Action Reproduction" in DESIGN, which describes an Open vSwitch change in behavior in corner cases that may affect some controllers. - ovs-l3ping: - A new test utility that can create L3 tunnel between two Open vSwitches and detect connectivity issues. - ovs-ofctl: - New --sort and --rsort options for "dump-flows" command. - "mod-port" command can now control all OpenFlow config flags. - OpenFlow: - Allow general bitwise masking for IPv4 and IPv6 addresses in IPv4, IPv6, and ARP packets. (Previously, only CIDR masks were allowed.) - Allow support for arbitrary Ethernet masks. (Previously, only the multicast bit in the destination address could be individually masked.) - New field OXM_OF_METADATA, to align with OpenFlow 1.1. - The OFPST_QUEUE request now reports an error if a specified port or queue does not exist, or for requests for a specific queue on all ports, if the specified queue does not exist on any port. (Previous versions generally reported an empty set of results.) - New "flow monitor" feature to allow controllers to be notified of flow table changes as they happen. - Additional protocols are not mirrored and dropped when forward-bpdu is false. For a full list, see the ovs-vswitchd.conf.db man page. - Open vSwitch now sends RARP packets in situations where it previously sent a custom protocol, making it consistent with behavior of QEMU and VMware. - All Open vSwitch programs and log files now show timestamps in UTC, instead the local timezone, by default. v1.7.0 - 30 Jul 2012 ------------------------ - kernel modules are renamed. openvswitch_mod.ko is now openvswitch.ko and brcompat_mod.ko is now brcompat.ko. - Increased the number of NXM registers to 8. - Added ability to configure DSCP setting for manager and controller connections. By default, these connections have a DSCP value of Internetwork Control (0xc0). - Added the granular link health statistics, 'cfm_health', to an interface. - OpenFlow: - Added support to mask nd_target for ICMPv6 neighbor discovery flows. - Added support for OpenFlow 1.3 port description (OFPMP_PORT_DESC) multipart messages. - ovs-ofctl: - Added the "dump-ports-desc" command to retrieve port information using the new port description multipart messages. - ovs-test: - Added support for spawning ovs-test server from the client. - Now ovs-test is able to automatically create test bridges and ports. - "ovs-dpctl dump-flows" now prints observed TCP flags in TCP flows. - Tripled flow setup performance. - The "coverage/log" command previously available through ovs-appctl has been replaced by "coverage/show". The new command replies with coverage counter values, instead of logging them. v1.6.1 - 25 Jun 2012 ------------------------ - Allow OFPP_CONTROLLER as the in_port for packet-out messages. v1.6.0 - 24 Feb 2012 ------------------------ *** Internal only release *** - bonding - LACP bonds no longer fall back to balance-slb when negotiations fail. Instead they drop traffic. - The default bond_mode changed from SLB to active-backup, to protect unsuspecting users from the significant risks of SLB bonds (which are documented in vswitchd/INTERNALS). - Load balancing can be disabled by setting the bond-rebalance-interval to zero. - OpenFlow: - Added support for bitwise matching on TCP and UDP ports. See ovs-ofctl(8) for more information. - NXM flow dumps now include times elapsed toward idle and hard timeouts. - Added an OpenFlow extension NXT_SET_ASYNC_CONFIG that allows controllers more precise control over which OpenFlow messages they receive asynchronously. - New "fin_timeout" action. - Added "fin_timeout" support to "learn" action. - New Nicira action NXAST_CONTROLLER that offers additional features over output to OFPP_CONTROLLER. - When QoS settings for an interface do not configure a default queue (queue 0), Open vSwitch now uses a default configuration for that queue, instead of dropping all packets as in previous versions. - Logging: - Logging to console and file will have UTC timestamp as a default for all the daemons. An example of the default format is 2012-01-27T16:35:17Z. ovs-appctl can be used to change the default format as before. - The syntax of commands and options to set log levels was simplified, to make it easier to remember. - New support for limiting the number of flows in an OpenFlow flow table, with configurable policy for evicting flows upon overflow. See the Flow_Table table in ovs-vswitch.conf.db(5) for more information. - New "enable-async-messages" column in the Controller table. If set to false, OpenFlow connections to the controller will initially have all asynchronous messages disabled, overriding normal OpenFlow behavior. - ofproto-provider interface: - "struct rule" has a new member "used" that ofproto implementations should maintain by updating with ofproto_rule_update_used(). - ovsdb-client: - The new option --timestamp causes the "monitor" command to print a timestamp with every update. - CFM module CCM broadcasts can now be tagged with an 802.1p priority. v1.5.0 - 01 Jun 2012 ------------------------ - OpenFlow: - Added support for querying, modifying, and deleting flows based on flow cookie when using NXM. - Added new NXM_PACKET_IN format. - Added new NXAST_DEC_TTL action. - ovs-ofctl: - Added daemonization support to the monitor and snoop commands. - ovs-vsctl: - The "find" command supports new set relational operators {=}, {!=}, {<}, {>}, {<=}, and {>=}. - ovsdb-tool now uses the typical database and schema installation directories as defaults. - The default MAC learning timeout has been increased from 60 seconds to 300 seconds. The MAC learning timeout is now configurable. v1.4.0 - 30 Jan 2012 ------------------------ - Compatible with Open vSwitch kernel module included in Linux 3.3. - New "VLAN splinters" feature to work around buggy device drivers in old Linux versions. (This feature is deprecated. When broken device drivers are no longer in widespread use, we will delete this feature.) See ovs-vswitchd.conf.db(5) for more information. - OpenFlow: - Added ability to match on IPv6 flow label through NXM. - Added ability to match on ECN bits in IPv4 and IPv6 through NXM. - Added ability to match on TTL in IPv4 and IPv6 through NXM. - Added ability to modify ECN bits in IPv4. - Added ability to modify TTL in IPv4. - ovs-vswitchd: - Don't require the "normal" action to use mirrors. Traffic will now be properly mirrored for any flows, regardless of their actions. - Track packet and byte statistics sent on mirrors. - The sFlow implementation can now usually infer the correct agent device instead of having to be told explicitly. - ovs-appctl: - New "fdb/flush" command to flush bridge's MAC learning table. - ovs-test: - A new distributed testing tool that allows one to diagnose performance and connectivity issues. This tool currently is not included in RH or Xen packages. - RHEL packaging now supports integration with Red Hat network scripts. - bonding: - Post 1.4.*, OVS will be changing the default bond mode from balance-slb to active-backup. SLB bonds carry significant risks with them (documented vswitchd/INTERNALS) which we want to prevent unsuspecting users from running into. Users are advised to update any scripts or configuration which may be negatively impacted by explicitly setting the bond mode which they want to use. v1.3.0 - 09 Dec 2011 ------------------------ - OpenFlow: - Added an OpenFlow extension which allows the "output" action to accept NXM fields. - Added an OpenFlow extension for flexible learning. - Bumped number of NXM registers from four to five. - ovs-appctl: - New "version" command to determine version of running daemon. - If no argument is provided for "cfm/show", displays detailed information about all interfaces with CFM enabled. - If no argument is provided for "lacp/show", displays detailed information about all ports with LACP enabled. - ovs-dpctl: - New "set-if" command to modify a datapath port's configuration. - ovs-vswitchd: - The software switch now supports 255 OpenFlow tables, instead of just one. By default, only table 0 is consulted, but the new NXAST_RESUBMIT_TABLE action can look up in additional tables. Tables 128 and above are reserved for use by the switch itself; please use only tables 0 through 127. - Add support for 802.1D spanning tree (STP). - Fragment handling extensions: - New OFPC_FRAG_NX_MATCH fragment handling mode, in which L4 fields are made available for matching in fragments with offset 0. - New NXM_NX_IP_FRAG match field for matching IP fragments (usable via "ip_frag" in ovs-ofctl). - New ovs-ofctl "get-frags" and "set-frags" commands to get and set fragment handling policy. - CAPWAP tunneling now supports an extension to transport a 64-bit key. By default it remains compatible with the old version and other standards-based implementations. - Flow setups are now processed in a round-robin manner across ports to prevent any single client from monopolizing the CPU and conducting a denial of service attack. - Added support for native VLAN tagging. A new "vlan_mode" parameter can be set for "port". Possible values: "access", "trunk", "native-tagged" and "native-untagged". - test-openflowd has been removed. Please use ovs-vswitchd instead. v1.2.0 - 03 Aug 2011 ------------------------ - New "ofproto" abstraction layer to ease porting to hardware switching ASICs. - Packaging for Red Hat Enterprise Linux 5.6 and 6.0. - Datapath support for Linux kernels up to 3.0. - OpenFlow: - New "bundle" and "bundle_load" action extensions. - Database: - Implement table unique constraints. - Support cooperative locking between callers. - ovs-dpctl: - New "-s" option for "show" command prints packet and byte counters for each port. - ovs-ofctl: - New "--readd" option for "replace-flows". - ovs-vsctl: - New "show" command to print an overview of configuration. - New "comment" command to add remark that explains intentions. - ovs-brcompatd has been rewritten to fix long-standing bugs. - ovs-openflowd has been renamed test-openflowd and moved into the tests directory. Its presence confused too many users. Please use ovs-vswitchd instead. - New ovs-benchmark utility to test flow setup performance. - A new log level "off" has been added. Configuring a log facility "off" prevents any messages from being logged to it. Previously, "emer" was effectively "off" because no messages were ever logged at level "emer". Now, errors that cause a process to exit are logged at "emer" level. - "configure" option --with-l26 has been renamed --with-linux, and --with-l26-source has been renamed --with-linux-source. The old names will be removed after the next release, so please update your scripts. - The "-2.6" suffix has been dropped from the datapath/linux-2.6 and datapath/linux-2.6/compat-2.6 directories. - Feature removals: - Dropped support for "tun_id_from_cookie" OpenFlow extension. Please use the extensible match extensions instead. - Removed the Maintenance_Point and Monitor tables in an effort to simplify 802.1ag configuration. - Performance and scalability improvements - Bug fixes v1.1.0 - 05 Apr 2011 ------------------------ - Ability to define policies over IPv6 - LACP - 802.1ag CCM - Support for extensible match extensions to OpenFlow - QoS: - Support for HFSC qdisc. - Queue used by in-band control can now be configured. - Kernel: - Kernel<->userspace interface has been reworked and should be close to a stable ABI now. - "Port group" concept has been dropped. - GRE over IPSEC tunnels - Bonding: - New active backup bonding mode. - New L4 hashing support when LACP is enabled. - Source MAC hash now includes VLAN field also. - miimon support. - Greatly improved handling of large flow tables - ovs-dpctl: - "show" command now prints full vport configuration. - "dump-groups" command removed since kernel support for port groups was dropped. - ovs-vsctl: - New commands for working with the new Managers table. - "list" command enhanced with new formatting options and --columns option. - "get" command now accepts new --id option. - New "find" command. - ovs-ofctl: - New "queue-stats" command for printing queue stats. - New commands "replace-flows" and "diff-flows". - Commands to add and remove flows can now read from files. - New --flow-format option to enable or disable NXM. - New --more option to increase OpenFlow message verbosity. - Removed "tun-cookie" command, which is no longer useful. - ovs-controller enhancements for testing various features. - New ovs-vlan-test command for testing for Linux kernel driver VLAN bugs. New ovs-vlan-bug-workaround command for enabling and disabling a workaround for these driver bugs. - OpenFlow support: - "Resubmit" actions now update flow statistics. - New "register" extension for use in matching and actions, via NXM. - New "multipath" experimental action extension. - New support for matching multicast Ethernet frames, via NXM. - New extension for OpenFlow vendor error codes. - New extension to set the QoS output queue without actually sending to an output port. - Open vSwitch now reports a single flow table, instead of separate hash and wildcard tables. This better models the current implementation. - New experimental "note" action. - New "ofproto/trace" ovs-appctl command and associated utilities to ease debugging complex flow tables. - Database: - Schema documentation now includes an entity-relationship diagram. - The database is now garbage collected. In most tables, unreferenced rows will be deleted automatically. - Many tables now include statistics updated periodically by ovs-vswitchd or ovsdb-server. - Every table now has an "external-ids" column for use by OVS integrators. - There is no default controller anymore. Each bridge must have its controller individually specified. - The "fail-mode" is now a property of a Bridge instead of a Controller. - New versioning and checksum features. - New Managers table and manager_options column in Open_vSwitch table for specifying managers. The old "managers" column in the Open_vSwitch table has been removed. - Many "name" columns are now immutable. - Feature removals: - Dropped support for XenServer pre-5.6.100. - Dropped support for Linux pre-2.6.18. - Dropped controller discovery support. - Dropped "ovs-ofctl status" and the OpenFlow extension that it used. Statistics reporting in the database is a rough equivalent. - Dropped the "corekeeper" package (now separate, at http://openvswitch.org/cgi-bin/gitweb.cgi?p=corekeeper). - Performance and scalability improvements - Bug fixes v1.1.0pre2 - 13 Sep 2010 ------------------------ - Bug fixes v1.1.0pre1 - 31 Aug 2010 ------------------------ - OpenFlow 1.0 slicing (QoS) functionality - Python bindings for configuration database (no write support) - Performance and scalability improvements - Bug fixes v1.0.1 - 31 May 2010 -------------------- - New "patch" interface type - Bug fixes v1.0.0 - 15 May 2010 -------------------- - Configuration database with remote management - OpenFlow 1.0 - GRE tunneling - Support for XenServer 5.5 and 5.6 - Performance and scalability improvements - Bug fixes v0.99.2 - 18 Feb 2010 --------------------- - Bug fixes v0.99.1 - 25 Jan 2010 --------------------- - Add support for sFlow(R) - Make headers compatible with C++ - Bug fixes v0.99.0 - 14 Jan 2010 --------------------- - User-space forwarding engine - Bug fixes v0.90.7 - 29 Nov 2009 --------------------- - Add support for NetFlow active timeouts - Bug fixes v0.90.6 - 6 Oct 2009 -------------------- - Bug fixes v0.90.5 - 21 Sep 2009 --------------------- - Generalize in-band control to more diverse network setups - Bug fixes