coverage: Make ovs-appctl command more useful and less alarming.

[mirror_ovs.git] / NEWS

post-v1.6.0
------------------------
    - 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.
    - 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.
    - 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      has been replaced by "coverage/show".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.


v1.6.0 - xx xxx xxxx
------------------------
    - 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.
    - The default MAC learning timeout has been increased from 60 seconds
      to 300 seconds.  The MAC learning timeout is now configurable.
    - 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 - xx xxx xxxx
------------------------
    - 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.


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