Ovs

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- 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.

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- 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.

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- 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

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- 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

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- Bug fixes

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- OpenFlow 1.0 slicing (QoS) functionality
- Python bindings for configuration database (no write support)
- Performance and scalability improvements
- Bug fixes