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Post-v2.17.0
---------------------
- libopenvswitch API change:
* To fix the Undefined Behavior issue causing the compiler to incorrectly
optimize important parts of code, container iteration macros (e.g.,
LIST_FOR_EACH) have been re-implemented in a UB-safe way.
* Backwards compatibility has mostly been preserved, however the
user-provided pointer is now set to NULL after the loop (unless it
exited via "break;")
* Users of libopenvswitch will need to double-check the use of such loop
macros before compiling with a new version.
* Since the change is limited to the definitions within the headers, the
ABI is not affected.
- OVSDB:
* 'relay' service model now supports transaction history, i.e. honors the
'last-txn-id' field in 'monitor_cond_since' requests from clients.
- OVSDB-IDL:
* New monitor mode flag, OVSDB_IDL_WRITE_CHANGED_ONLY, allowing
applications to relax atomicity requirements when dealing with
columns whose value has been rewritten (but not changed).
- OpenFlow:
* Extended Flow Monitoring support for all supported OpenFlow versions:
OpenFlow versions 1.0-1.2 with Nicira Extensions
OpenFlow versions 1.3 with Open Network Foundation extension
OpenFlow versions 1.4+, as defined in the OpenFlow specification
- IPsec:
* Added support for custom per-tunnel options via 'options:ipsec_*' knobs.
See Documentation/tutorials/ipsec.rst for details.
- Windows:
* Conntrack support for TCPv6, UDPv6, ICMPv6, FTPv6.
* IPv6 Geneve tunnel support.
v2.17.0 - 17 Feb 2022
---------------------
- Userspace datapath:
* Optimized flow lookups for datapath flows with simple match criteria.
See 'Simple Match Lookup' in Documentation/topics/dpdk/bridge.rst.
* New per-interface configuration knob 'other_config:tx-steering'. If set
to 'hash', enables hash-based Tx packet steering mode to utilize all the
Tx queues of the interface regardles of the number of PMD threads.
* Removed experimental tag for PMD Auto Load Balance.
* New configuration knob 'other_config:n-offload-threads' to change the
number of HW offloading threads.
- DPDK:
* EAL argument --socket-mem is no longer configured by default upon
start-up. If dpdk-socket-mem and dpdk-alloc-mem are not specified,
DPDK defaults will be used.
* EAL argument --socket-limit no longer takes on the value of --socket-mem
by default. 'other_config:dpdk-socket-limit' can be set equal to
the 'other_config:dpdk-socket-mem' to preserve the legacy memory
limiting behavior.
* EAL argument --in-memory is applied by default if supported.
* Add hardware offload support for matching IPv4/IPv6 frag types
(experimental).
* Add hardware offload support for GRE flows (experimental).
Available only if DPDK experimental APIs enabled during the build.
* Add support for DPDK 21.11.
* Forbid use of DPDK multiprocess feature.
* Add support for running threads on cores >= RTE_MAX_LCORE.
- Python:
* For SSL support, the use of the pyOpenSSL library has been replaced
with the native 'ssl' module.
- OVSDB:
* Python library for OVSDB clients now also supports faster
resynchronization with a clustered database after a brief disconnection,
i.e. 'monitor_cond_since' monitoring method.
* Major improvement in the performance of the OVSDB server. See the
"OVSDB: Performance and Scale Journey '21" talk of OVS+OVN Conf'21.
- ovs-dpctl and 'ovs-appctl dpctl/':
* New commands 'cache-get-size' and 'cache-set-size' that allows to
get or configure linux kernel datapath cache sizes.
- ovs-ofctl dump-flows no longer prints "igmp". Instead the flag
"ip,nw_proto=2" is used.
- ovs-appctl:
* New command tnl/neigh/aging to read/write the neigh aging time.
- OpenFlow:
* Default selection method for select groups with up to 256 buckets is
now dp_hash. Previously this was limited to 64 buckets. This change
is mainly for the benefit of OVN load balancing configurations.
* Encap & Decap action support for MPLS packet type.
- Ingress policing on Linux now uses 'matchall' classifier instead of
'basic', if available.
- Add User Statically-Defined Tracing (USDT) probe framework support.
v2.16.0 - 16 Aug 2021
---------------------
- Removed support for 1024-bit Diffie-Hellman key exchange, which is now
considered unsafe.
- Ingress Policing:
* Rate limiting configuration now supports setting packet-per-second
limits in addition to the previously configurable byte rate settings.
This is not supported in the userspace datapath yet.
- OVSDB:
* Introduced new database service model - "relay". Targeted to scale out
read-mostly access (ovn-controller) to existing databases.
For more information: ovsdb(7) and Documentation/topics/ovsdb-relay.rst
* New command line options --record/--replay for ovsdb-server and
ovsdb-client to record and replay all the incoming transactions,
monitors, etc. More datails in Documentation/topics/record-replay.rst.
* The Python Idl class now has a cooperative_yield() method that can be
overridden by an application that uses eventlet / gevent / asyncio with
the desired yield method (e.g. {eventlet,gevent,asyncio}.sleep(0)) to
prevent the application from being blocked for a long time while
processing database updates.
- In ovs-vsctl and vtep-ctl, the "find" command now accept new
operators {in} and {not-in}.
- Userspace datapath:
* Auto load balancing of PMDs now partially supports cross-NUMA polling
cases, e.g if all PMD threads are running on the same NUMA node.
* Userspace datapath now supports up to 2^18 meters.
* Added support for systems with non-contiguous NUMA nodes and core ids.
* Added all-zero IP SNAT handling to conntrack. In case of collision,
using ct(src=0.0.0.0), the source port will be replaced with another
non-colliding port in the ephemeral range (1024, 65535).
* Refactor lib/dpif-netdev.c to multiple header files.
* Add avx512 implementation of dpif which can process non recirculated
packets. It supports partial HWOL, EMC, SMC and DPCLS lookups.
* Add commands to get and set the dpif implementations.
* Add a partial HWOL PMD statistic counting hits similar to existing
EMC/SMC/DPCLS stats.
* Enable AVX512 optimized DPCLS to search subtables with larger miniflows.
* Add more specialized DPCLS subtables to cover common rules, enhancing
the lookup performance.
* Enable the AVX512 DPCLS implementation to use VPOPCNT instruction if the
CPU supports it. This enhances performance by using the native vpopcount
instructions, instead of the emulated version of vpopcount.
* Add command line option to switch between MFEX function pointers.
* Add miniflow extract auto-validator function to compare different
miniflow extract implementations against default implementation.
* Add study function to miniflow function table which studies packet
and automatically chooses the best miniflow implementation for that
traffic.
* Add build time configure command to enable auto-validatior as default
miniflow implementation at build time.
* Cache results for CPU ISA checks, reduces overhead on repeated lookups.
* Add AVX512 based optimized miniflow extract function for traffic type
IPv4/UDP, IPv4/TCP, Vlan/IPv4/UDP and Vlan/Ipv4/TCP.
* Added new 'group' option to pmd-rxq-assign. This will assign rxq to pmds
purely based on rxq and pmd load.
* Add new 'pmd-rxq-isolate' option that can be set to 'false' in order
that pmd cores which are pinned with rxqs using 'pmd-rxq-affinity'
are available for assigning other non-pinned rxqs.
- ovs-ctl:
* New option '--no-record-hostname' to disable hostname configuration
in ovsdb on startup.
* New command 'record-hostname-if-not-set' to update hostname in ovsdb.
- DPDK:
* OVS validated with DPDK 20.11.1. It is recommended to use this version
until further releases.
* New debug appctl command 'dpdk/get-malloc-stats'.
* Add hardware offload support for tunnel pop action (experimental).
Available only if DPDK experimental APIs enabled during the build.
* Add hardware offload support for VXLAN flows (experimental).
Available only if DPDK experimental APIs enabled during the build.
* EAL options --socket-mem and --socket-limit to have default values
removed with 2.17 release. Logging added to alert users.
- ovsdb-tool:
* New option '--election-timer' to the 'create-cluster' command to set the
leader election timer during cluster creation.
- OVS now reports the datapath capability 'ct_zero_snat', which reflects
whether the SNAT with all-zero IP address is supported.
See ovs-vswitchd.conf.db(5) for details.
- ovs-appctl:
* Added ability to add and delete static mac entries using:
'ovs-appctl fdb/add <bridge> <port> <vlan> <mac>'
'ovs-appctl fdb/del <bridge> <vlan> <mac>'
- Linux datapath:
* ovs-vswitchd will configure the kernel module using per-cpu dispatch
mode (if available). This changes the way upcalls are delivered to user
space in order to resolve a number of issues with per-vport dispatch.
* New vswitchd unixctl command `dpif-netlink/dispatch-mode` will return
the current dispatch mode for each datapath.
v2.15.0 - 15 Feb 2021
---------------------
- OVSDB:
* Changed format in which ovsdb transactions are stored in database files.
Now each transaction contains diff of data instead of the whole new
value of a column.
New ovsdb-server process will be able to read old database format, but
old processes will *fail* to read database created by the new one.
For cluster and active-backup service models follow upgrade instructions
in 'Upgrading from version 2.14 and earlier to 2.15 and later' section
of ovsdb(7).
* New unixctl command 'ovsdb-server/get-db-storage-status' to show the
status of the storage that's backing a database.
* New unixctl command 'ovsdb-server/memory-trim-on-compaction on|off'.
If turned on, ovsdb-server will try to reclaim all the unused memory
after every DB compaction back to OS. Disabled by default.
* Maximum backlog on RAFT connections limited to 500 messages or 4GB.
Once threshold reached, connection is dropped (and re-established).
Use the 'cluster/set-backlog-threshold' command to change limits.
- DPDK:
* Removed support for vhost-user dequeue zero-copy.
* Add support for DPDK 20.11.
- Userspace datapath:
* Add the 'pmd' option to "ovs-appctl dpctl/dump-flows", which
restricts a flow dump to a single PMD thread if set.
* New 'options:dpdk-vf-mac' field for DPDK interface of VF ports,
that allows configuring the MAC address of a VF representor.
* Add generic IP protocol support to conntrack. With this change, all
none UDP, TCP, and ICMP traffic will be treated as general L3
traffic, i.e. using 3 tupples.
* Add parameters 'pmd-auto-lb-load-threshold' and
'pmd-auto-lb-improvement-threshold' to configure PMD auto load balance
behaviour.
- The environment variable OVS_UNBOUND_CONF, if set, is now used
as the DNS resolver's (unbound) configuration file.
- Linux datapath:
* Support for kernel versions up to 5.8.x.
- Terminology:
* The terms "master" and "slave" have been replaced by "primary" and
"secondary", respectively, for OpenFlow connection roles.
* The term "slave" has been replaced by "member", for bonds, LACP, and
OpenFlow bundle actions.
- Support for GitHub Actions based continuous integration builds has been
added.
- Bareudp Tunnel
* Bareudp device support is present in linux kernel from version 5.7
* Kernel bareudp device is not backported to ovs tree.
* Userspace datapath support is not added
- ovs-dpctl and 'ovs-appctl dpctl/':
* New commands '{add,mod,del}-flows' where added, which allow adding,
deleting, or modifying flows based on information read from a file.
- IPsec:
* Add option '--no-cleanup' to allow ovs-monitor-ipsec to stop without
tearing down IPsec tunnels.
* Add option '--no-restart-ike-daemon' to allow ovs-monitor-ipsec to start
without restarting ipsec daemon.
- Building the Linux kernel module from the OVS source tree is deprecated
* Support for the Linux kernel is capped at version 5.8
* Only bug fixes for the Linux OOT kernel module will be accepted.
* The Linux kernel module will be fully removed from the OVS source tree
in OVS branch 2.18
v2.14.0 - 17 Aug 2020
---------------------
- ovs-vswitchd no longer deletes datapath flows on exit by default.
- OpenFlow:
* The OpenFlow ofp_desc/serial_num may now be configured by setting the
value of other-config:dp-sn in the Bridge table.
* Added support to watch CONTROLLER port status in fast failover group.
* New action "delete_field".
- DPDK:
* Deprecated DPDK pdump packet capture support removed.
* Deprecated DPDK ring ports (dpdkr) are no longer supported.
* Add hardware offload support for VLAN Push/Pop actions (experimental).
* Add hardware offload support for matching IPv6 protocol (experimental).
* Add hardware offload support for set of IPv6 src/dst/ttl
and tunnel push-output actions (experimental).
* OVS validated with DPDK 19.11.2, due to the inclusion of fixes for
CVE-2020-10722, CVE-2020-10723, CVE-2020-10724, CVE-2020-10725 and
CVE-2020-10726, this DPDK version is strongly recommended to be used.
* New 'ovs-appctl dpdk/log-list' and 'ovs-appctl dpdk/log-set' commands
to list and change log levels in DPDK components.
* Vhost-user Dequeue zero-copy support is deprecated and will be removed
in the next release.
- Linux datapath:
* Support for kernel versions up to 5.5.x.
- AF_XDP:
* New netdev class 'afxdp-nonpmd' for netdev-afxdp to save CPU cycles
by enabling interrupt mode.
- Userspace datapath:
* Removed artificial datapath flow limit that was 65536.
Now number of datapath flows is fully controlled by revalidators and the
'other_config:flow-limit' knob.
* Add support for conntrack zone-based timeout policy.
* New configuration knob 'other_config:lb-output-action' for bond ports
that enables new datapath action 'lb_output' to avoid recirculation
in balance-tcp mode. Disabled by default.
* Add runtime CPU ISA detection to allow optimized ISA functions
* Add support for dynamically changing DPCLS subtable lookup functions
* Add ISA optimized DPCLS lookup function using AVX512
- New configuration knob 'other_config:bond-primary' for AB bonds
that specifies interface will be the preferred port if it is active.
- Tunnels: TC Flower offload
* Tunnel Local endpoint address masked match are supported.
* Tunnel Romte endpoint address masked match are supported.
- GTP-U Tunnel Protocol
* Add two new fields: tun_gtpu_flags, tun_gtpu_msgtype.
* Only support for userspace datapath.
v2.13.0 - 14 Feb 2020
---------------------
- OVN:
* OVN has been removed from this repository. It now exists as a
separate project. You can find it at
https://github.com/ovn-org/ovn.git
- Userspace datapath:
* Add option to enable, disable and query TCP sequence checking in
conntrack.
* Add support for conntrack zone limits.
* Command "ovs-appctl dpctl/dump-flows" refactored to show subtable
miniflow bits for userspace datapath.
- AF_XDP:
* New option 'use-need-wakeup' for netdev-afxdp to control enabling
of corresponding 'need_wakeup' flag in AF_XDP rings. Enabled by default
if supported by libbpf.
* 'xdpmode' option for netdev-afxdp renamed to 'xdp-mode'.
Modes also updated. New values:
native-with-zerocopy - former DRV
native - new one, DRV without zero-copy
generic - former SKB
best-effort [default] - new one, chooses the best available from
3 above modes
- DPDK:
* DPDK pdump packet capture support disabled by default. New configure
option '--enable-dpdk-pdump' to enable it.
* DPDK pdump support is deprecated and will be removed in next releases.
* DPDK ring ports (dpdkr) are deprecated and will be removed in next
releases.
* Add support for DPDK 19.11.
* Add hardware offload support for output, drop, set of MAC, IPv4 and
TCP/UDP ports actions (experimental).
* Add experimental support for TSO.
- RSTP:
* The rstp_statistics column in Port table will only be updated every
stats-update-interval configured in Open_vSwitch table.
- OVSDB:
* When ovsdb-server is running in backup mode, the default value of probe
interval is increased to 60 seconds for the connection to the
replication server. This value is configurable with the unixctl
command - ovsdb-server/set-active-ovsdb-server-probe-interval.
* ovsdb-server: New OVSDB extension to allow clients to specify row UUIDs.
- 'ovs-appctl dpctl/dump-flows' can now show offloaded=partial for
partially offloaded flows, dp:dpdk for fully offloaded by dpdk, and
type filter supports new filters: "dpdk" and "partially-offloaded".
- Add new argument '--offload-stats' for command
'ovs-appctl bridge/dump-flows',
so it can display offloaded packets statistics.
v2.12.0 - 03 Sep 2019
---------------------
- DPDK:
* New option 'other_config:dpdk-socket-limit' to limit amount of
hugepage memory that can be used by DPDK.
* Add support for vHost Post-copy Live Migration (experimental).
* OVS validated with DPDK 18.11.2 which is the new minimal supported
version.
* DPDK 18.11.1 and lower is no longer supported.
* New option 'tx-retries-max' to set the maximum amount of vhost tx
retries that can be made.
- OpenFlow:
* All features required by OpenFlow 1.5 are now implemented, so
ovs-vswitchd now enables OpenFlow 1.5 by default (in addition to
OpenFlow 1.0 to 1.4).
* Removed support for OpenFlow 1.6 (draft), which ONF abandoned.
* New action "check_pkt_larger".
* Support for OpenFlow 1.5 "meter" action.
- Userspace datapath:
* ICMPv6 ND enhancements: support for match and set ND options type
and reserved fields.
* Add v4/v6 fragmentation support for conntrack.
* New ovs-appctl "dpctl/ipf-set-enabled" and "dpctl/ipf-set-disabled"
commands for userspace datapath conntrack fragmentation support.
* New "ovs-appctl dpctl/ipf-set-min-frag" command for userspace
datapath conntrack fragmentation support.
* New "ovs-appctl dpctl/ipf-set-max-nfrags" command for userspace datapath
conntrack fragmentation support.
* New "ovs-appctl dpctl/ipf-get-status" command for userspace datapath
conntrack fragmentation support.
* New action "check_pkt_len".
* Port configuration with "other-config:priority-tags" now has a mode
that retains the 802.1Q header even if VLAN and priority are both zero.
* 'ovs-appctl exit' now implies cleanup of non-internal ports in userspace
datapath regardless of '--cleanup' option. Use '--cleanup' to remove
internal ports too.
* Removed experimental tag for SMC cache.
* Datapath classifer code refactored to enable function pointers to select
the lookup implementation at runtime. This enables specialization of
specific subtables based on the miniflow attributes, enhancing the
performance of the subtable search.
* Add Linux AF_XDP support through a new experimental netdev type "afxdp".
- OVSDB:
* OVSDB clients can now resynchronize with clustered servers much more
quickly after a brief disconnection, saving bandwidth and CPU time.
See section 4.1.15 of ovsdb-server(7) for details of related OVSDB
protocol extension.
* Support to convert from cluster database to standalone database is now
available when clustered is down and cannot be revived using ovsdb-tool
. Check "Database Migration Commands" in ovsdb-tool man section.
- OVN:
* IPAM/MACAM:
- select IPAM mac_prefix in a random manner if not provided by the user
- add the capability to specify a static IPv4 and/or IPv6 address and
get the L2 one allocated dynamically using the following syntax:
ovn-nbctl lsp-set-addresses <port> "dynamic <IPv4 addr> <IPv6 addr>"
* Added the HA chassis group support.
* Added 'external' logical port support.
* Added Policy-based routing(PBR) support to create permit/deny/reroute
policies on the logical router. New table(Logical_Router_Policy) added in
OVN-NB schema. New "ovn-nbctl" commands to add/delete/list PBR policies.
* Support for Transport Zones, a way to separate chassis into
logical groups which results in tunnels only been formed between
members of the same transport zone(s).
* Support for IGMP Snooping and IGMP Querier.
- New QoS type "linux-netem" on Linux.
- Added support for TLS Server Name Indication (SNI).
- Linux datapath:
* Support for the kernel versions 4.19.x and 4.20.x.
* Support for the kernel version 5.0.x.
* Add support for conntrack zone-based timeout policy.
- 'ovs-dpctl dump-flows' is no longer suitable for dumping offloaded flows.
'ovs-appctl dpctl/dump-flows' should be used instead.
- Add L2 GRE tunnel over IPv6 support.
v2.11.0 - 19 Feb 2019
---------------------
- OpenFlow:
* OFPMP_TABLE_FEATURES_REQUEST can now modify table features.
- ovs-ofctl:
* "mod-table" command can now change OpenFlow table names.
- ovn:
* OVN-SB schema changed: duplicated IP with same Encapsulation type
is not allowed any more. Please refer to
Documentation/intro/install/ovn-upgrades.rst for the instructions
in case there are problems encountered when upgrading from an earlier
version.
* New support for IPSEC encrypted tunnels between hypervisors.
* ovn-ctl: allow passing user:group ids to the OVN daemons.
* IPAM/MACAM:
- add the capability to dynamically assign just L2 addresses
- add the capability to specify a static ip address and get the L2 one
allocated dynamically using the following syntax:
ovn-nbctl lsp-set-addresses <port> "dynamic <IP>"
- DPDK:
* Add support for DPDK 18.11
* Add support for port representors.
- Userspace datapath:
* Add option for simple round-robin based Rxq to PMD assignment.
It can be set with pmd-rxq-assign.
* Add support for Auto load balancing of PMDs (experimental)
* Added new per-port configurable option to manage EMC:
'other_config:emc-enable'.
- Add 'symmetric_l3' hash function.
- OVS now honors 'updelay' and 'downdelay' for bonds with LACP configured.
- ovs-vswitchd:
* New configuration option "offload-rebalance", that enables dynamic
rebalancing of offloaded flows.
- The environment variable OVS_SYSLOG_METHOD, if set, is now used
as the default syslog method.
- The environment variable OVS_CTL_TIMEOUT, if set, is now used
as the default timeout for control utilities.
- The environment variable OVS_RESOLV_CONF, if set, is now used
as the DNS server configuration file.
- RHEL packaging:
* OVN packages are split from OVS packages. A new spec
file - ovn-fedora.spec.in is added to generate OVN packages.
- Linux datapath:
* Support for the kernel versions 4.16.x, 4.17.x, and 4.18.x.
v2.10.0 - 18 Aug 2018
---------------------
- ovs-vswitchd and utilities now support DNS names in OpenFlow and
OVSDB remotes.
- ovs-vswitchd:
* New options --l7 and --l7-len to "ofproto/trace" command.
* Previous versions gave OpenFlow tables default names of the form
"table#". These are not helpful names for the purpose of accepting
and displaying table names, so now tables by default have no names.
* The "null" interface type, deprecated since 2013, has been removed.
* Add minimum network namespace support for Linux.
* New command "lacp/show-stats"
- ovs-ofctl:
* ovs-ofctl now accepts and display table names in place of numbers. By
default it always accepts names and in interactive use it displays them;
use --names or --no-names to override. See ovs-ofctl(8) for details.
- ovs-vsctl: New commands "add-bond-iface" and "del-bond-iface".
- ovs-dpctl:
* New commands "ct-set-limits", "ct-del-limits", and "ct-get-limits".
- OpenFlow:
* OFPT_ROLE_STATUS is now available in OpenFlow 1.3.
* OpenFlow 1.5 extensible statistics (OXS) now implemented.
* New OpenFlow 1.0 extensions for group support.
* Default selection method for select groups is now dp_hash with improved
accuracy.
- Linux datapath
* Add support for compiling OVS with the latest Linux 4.14 kernel.
* Added support for meters.
* Add support for conntrack zone limit.
- ovn:
* Implemented icmp4/icmp6/tcp_reset actions in order to drop the packet
and reply with a RST for TCP or ICMPv4/ICMPv6 unreachable message for
other IPv4/IPv6-based protocols whenever a reject ACL rule is hit.
* ACL match conditions can now match on Port_Groups as well as address
sets that are automatically generated by Port_Groups. ACLs can be
applied directly to Port_Groups as well.
* ovn-nbctl can now run as a daemon (long-lived, background process).
See ovn-nbctl(8) for details.
- DPDK:
* New 'check-dpdk' Makefile target to run a new system testsuite.
See Testing topic for the details.
* Add LSC interrupt support for DPDK physical devices.
* Allow init to fail and record DPDK status/version in OVS database.
* Add experimental flow hardware offload support
* Support both shared and per port mempools for DPDK devices.
- Userspace datapath:
* Commands ovs-appctl dpif-netdev/pmd-*-show can now work on a single PMD
* Detailed PMD performance metrics available with new command
ovs-appctl dpif-netdev/pmd-perf-show
* Supervision of PMD performance metrics and logging of suspicious
iterations
* Add signature match cache (SMC) as experimental feature. When turned on,
it improves throughput when traffic has many more flows than EMC size.
- ERSPAN:
* Implemented ERSPAN protocol (draft-foschiano-erspan-00.txt) for
both kernel datapath and userspace datapath.
* Added port-based and flow-based ERSPAN tunnel port support, added
OpenFlow rules matching ERSPAN fields. See ovs-fields(7).
- ovs-pki
* ovs-pki now generates x.509 version 3 certificate. The new format adds
subjectAltName field and sets its value the same as common name (CN).
v2.9.0 - 19 Feb 2018
--------------------
- NSH implementation now conforms to latest draft (draft-ietf-sfc-nsh-28).
* Add ttl field.
* Add a new action dec_nsh_ttl.
* Enable NSH support in kernel datapath.
- OVSDB has new, experimental support for database clustering:
* New high-level documentation in ovsdb(7).
* New file format documentation for developers in ovsdb(5).
* Protocol documentation moved from ovsdb-server(1) to ovsdb-server(7).
* ovsdb-server now supports online schema conversion via
"ovsdb-client convert".
* ovsdb-server now always hosts a built-in database named _Server. See
ovsdb-server(5) for more details.
* ovsdb-client: New "get-schema-cksum", "query", "backup", "restore",
and "wait" commands. New --timeout option.
* ovsdb-tool: New "create-cluster", "join-cluster", "db-cid", "db-sid",
"db-local-address", "db-is-clustered", "db-is-standalone", "db-name",
"schema-name", "compare-versions", and "check-cluster" commands.
* ovsdb-server: New ovs-appctl commands for managing clusters.
* ovs-sandbox: New support for clustered databases.
- ovs-vsctl and other commands that display data in tables now support a
--max-column-width option to limit column width.
- No longer slow-path traffic that sends to a controller. Applications,
such as OVN ACL logging, want to send a copy of a packet to a
controller while leaving the actual packet forwarding in the datapath.
- OVN:
* The "requested-chassis" option for a logical switch port now accepts a
chassis "hostname" in addition to a chassis "name".
* IPv6
- Added support to send IPv6 Router Advertisement packets in response to
the IPv6 Router Solicitation packets from the VIF ports.
- Added support to generate Neighbor Solicitation packets using the OVN
action 'nd_ns' to resolve unknown next hop MAC addresses for the
IPv6 packets.
* Add support for QoS bandwidth limit with DPDK.
* ovn-ctl: New commands run_nb_ovsdb and run_sb_ovsdb.
* ovn-sbctl, ovn-nbctl: New options --leader-only, --no-leader-only.
- OpenFlow:
* ct_clear action is now backed by kernel datapath. Support is probed for
when OVS starts.
- Linux kernel 4.13
* Add support for compiling OVS with the latest Linux 4.13 kernel
- ovs-dpctl and related ovs-appctl commands:
* "flush-conntrack" now accept a 5-tuple to delete a specific
connection tracking entry.
* New "ct-set-maxconns", "ct-get-maxconns", and "ct-get-nconns" commands
for userspace datapath.
- No longer send packets to the Linux TAP device if it's DOWN unless it is
in another networking namespace.
- DPDK:
* Add support for DPDK v17.11
* Add support for vHost IOMMU
* New debug appctl command 'netdev-dpdk/get-mempool-info'.
* All the netdev-dpdk appctl commands described in ovs-vswitchd man page.
* Custom statistics:
- DPDK physical ports now return custom set of "dropped", "error" and
"management" statistics.
- ovs-ofctl dump-ports command now prints new of set custom statistics
if available (for OpenFlow 1.4+).
* Switch from round-robin allocation of rxq to pmd assignments to a
utilization-based allocation.
* New appctl command 'dpif-netdev/pmd-rxq-rebalance' to rebalance rxq to
pmd assignments.
* Add rxq utilization of pmd to appctl 'dpif-netdev/pmd-rxq-show'.
* Add support for vHost dequeue zero copy (experimental).
- Userspace datapath:
* Output packet batching support.
- vswitchd:
* Datapath IDs may now be specified as 0x1 (etc.) instead of 16 digits.
* Configuring a controller, or unconfiguring all controllers, now deletes
all groups and meters (as well as all flows).
- New --enable-sparse configure option enables "sparse" checking by default.
- Added additional information to vhost-user status.
v2.8.0 - 31 Aug 2017
--------------------
- ovs-ofctl:
* ovs-ofctl can now accept and display port names in place of numbers. By
default it always accepts names and in interactive use it displays them;
use --names or --no-names to override. See ovs-ofctl(8) for details.
* "ovs-ofctl dump-flows" now accepts --no-stats to omit flow statistics.
- New ovs-dpctl command "ct-stats-show" to show connection tracking stats.
- Tunnels:
* Added support to set packet mark for tunnel endpoint using
`egress_pkt_mark` OVSDB option.
* When using Linux kernel datapath tunnels may be created using rtnetlink.
This will allow us to take advantage of new tunnel features without
having to make changes to the vport modules.
- EMC insertion probability is reduced to 1% and is configurable via
the new 'other_config:emc-insert-inv-prob' option.
- DPDK:
* DPDK log messages redirected to OVS logging subsystem.
Log level can be changed in a usual OVS way using
'ovs-appctl vlog' commands for 'dpdk' module. Lower bound
still can be configured via extra arguments for DPDK EAL.
* dpdkvhostuser ports are marked as deprecated. They will be removed
in an upcoming release.
* Support for DPDK v17.05.1.
- IPFIX now provides additional counters:
* Total counters since metering process startup.
* Per-flow TCP flag counters.
* Multicast, broadcast, and unicast counters.
- New support for multiple VLANs (802.1ad or "QinQ"), including a new
"dot1q-tunnel" port VLAN mode.
- In ovn-vsctl and vtep-ctl, record UUIDs in commands may now be
abbreviated to 4 hex digits.
- Userspace Datapath:
* Added NAT support for userspace datapath.
* Added FTP and TFTP support with NAT for userspace datapath.
* Experimental NSH (Network Service Header) support in userspace datapath.
- OVN:
* New built-in DNS support.
* IPAM for IPv4 can now exclude user-defined addresses from assignment.
* IPAM can now assign IPv6 addresses.
* Make the DHCPv4 router setting optional.
* Gratuitous ARP for NAT addresses on a distributed logical router.
* Allow ovn-controller SSL configuration to be obtained from vswitchd
database.
* ovn-trace now has basic support for tracing distributed firewalls.
* In ovn-nbctl and ovn-sbctl, record UUIDs in commands may now be
abbreviated to 4 hex digits.
* "ovn-sbctl lflow-list" can now print OpenFlow flows that correspond
to logical flows.
* Now uses OVSDB RBAC support to reduce impact of compromised hypervisors.
* Multiple chassis may now be specified for L3 gateways. When more than
one chassis is specified, OVN will manage high availability for that
gateway.
* Add support for ACL logging.
* ovn-northd now has native support for active-standby high availability.
- Tracing with ofproto/trace now traces through recirculation.
- OVSDB:
* New support for role-based access control (see ovsdb-server(1)).
- New commands 'stp/show' and 'rstp/show' (see ovs-vswitchd(8)).
- OpenFlow:
* All features required by OpenFlow 1.4 are now implemented, so
ovs-vswitchd now enables OpenFlow 1.4 by default (in addition to
OpenFlow 1.0 to 1.3).
* Increased support for OpenFlow 1.6 (draft).
* Bundles now support hashing by just nw_src or nw_dst.
* The "learn" action now supports a "limit" option (see ovs-ofctl(8)).
* The port status bit OFPPS_LIVE now reflects link aliveness.
* OpenFlow 1.5 packet-out is now supported.
* Support for OpenFlow 1.5 field packet_type and packet-type-aware
pipeline (PTAP).
* Added generic encap and decap actions (EXT-382).
First supported use case is encap/decap for Ethernet.
* Added NSH (Network Service Header) support in userspace
Used generic encap and decap actions to implement encapsulation and
decapsulation of NSH header.
IETF NSH draft - https://datatracker.ietf.org/doc/draft-ietf-sfc-nsh/
* Conntrack state is only available to the processing path that
follows the "recirc_table" argument of the ct() action. Starting
in OVS 2.8, this state is now cleared for the current processing
path whenever ct() is called.
- Fedora Packaging:
* OVN services are no longer restarted automatically after upgrade.
* ovs-vswitchd and ovsdb-server run as non-root users by default.
- Add --cleanup option to command 'ovs-appctl exit' (see ovs-vswitchd(8)).
- L3 tunneling:
* Use new tunnel port option "packet_type" to configure L2 vs. L3.
* In conjunction with PTAP tunnel ports can handle a mix of L2 and L3
payload.
* New vxlan tunnel extension "gpe" to support VXLAN-GPE tunnels.
* New support for non-Ethernet (L3) payloads in GRE and VXLAN-GPE.
- The BFD detection multiplier is now user-configurable.
- Add experimental support for hardware offloading
* HW offloading is disabled by default.
* HW offloading is done through the TC interface.
- IPv6 link local addresses are now supported on Linux. Use % to designate
the scope device.
v2.7.0 - 21 Feb 2017
---------------------
- Utilities and daemons that support SSL now allow protocols and
ciphers to be configured with --ssl-protocols and --ssl-ciphers.
- OVN:
* QoS is now implemented via egress shaping rather than ingress policing.
* DSCP marking is now supported, via the new northbound QoS table.
* IPAM now supports fixed MAC addresses.
* Support for source IP address based routing.
* ovn-trace:
- New --ovs option to also print OpenFlow flows.
- put_dhcp_opts and put_dhcp_optsv6 actions may now be traced.
* Support for managing SSL and remote connection configuration in
northbound and southbound databases.
* TCP connections to northbound and southbound databases are no
longer enabled by default and must be explicitly configured.
See documentation for ovn-sbctl/ovn-nbctl "set-connection"
command or the ovn-ctl "--db-sb-create-insecure-remote" and
"--db-nb-create-insecure-remote" command-line options for
information regarding remote connection configuration.
* New appctl "inject-pkt" command in ovn-controller that allows
packets to be injected into the connected OVS instance.
* Distributed logical routers may now be connected directly to
logical switches with localnet ports, by specifying a
"redirect-chassis" on the distributed gateway port of the
logical router. NAT rules may be specified directly on the
distributed logical router, and are handled either centrally on
the "redirect-chassis", or in many cases are handled locally on
the hypervisor where the corresponding logical port resides.
Gratuitous ARP for NAT addresses on a distributed logical
router is not yet supported, but will be added in a future
version.
- Fixed regression in table stats maintenance introduced in OVS
2.3.0, wherein the number of OpenFlow table hits and misses was
not accurate.
- OpenFlow:
* OFPT_PACKET_OUT messages are now supported in bundles.
* A new "selection_method=dp_hash" type for OpenFlow select group
bucket selection that uses the datapath computed 5-tuple hash
without making datapath flows match the 5-tuple fields, which
is useful for more efficient load balancing, for example. This
uses the Netronome extension to OpenFlow 1.5+ that allows
control over the OpenFlow select groups selection method. See
"selection_method" and related options in ovs-ofctl(8) for
details.
* The "sample" action now supports "ingress" and "egress" options.
* The "ct" action now supports the TFTP ALG where support is available.
* New actions "clone" and "ct_clear".
* The "meter" action is now supported in the userspace datapath.
- ovs-ofctl:
* 'bundle' command now supports packet-out messages.
* New syntax for 'ovs-ofctl packet-out' command, which uses the
same string parser as the 'bundle' command. The old 'packet-out'
syntax is deprecated and will be removed in a later OVS
release.
* New unixctl "ofctl/packet-out" command, which can be used to
instruct a flow monitor to issue OpenFlow packet-out messages.
- ovsdb-server:
* Remote connections can now be made read-only (see ovsdb-server(1)).
- Tunnels:
* TLV mappings for protocols such as Geneve are now segregated on
a per-OpenFlow bridge basis rather than globally. (The interface
has not changed.)
* Removed support for IPsec tunnels.
- DPDK:
* New option 'n_rxq_desc' and 'n_txq_desc' fields for DPDK interfaces
which set the number of rx and tx descriptors to use for the given port.
* Support for DPDK v16.11.
* Support for rx checksum offload. Refer DPDK HOWTO for details.
* Port Hotplug is now supported.
* DPDK physical ports can now have arbitrary names. The PCI address of
the device must be set using the 'dpdk-devargs' option. Compatibility
with the old dpdk<portid> naming scheme is broken, and as such a
device will not be available for use until a valid dpdk-devargs is
specified.
* Virtual DPDK Poll Mode Driver (vdev PMD) support.
* Removed experimental tag.
- Fedora packaging:
* A package upgrade does not automatically restart OVS service.
- ovs-vswitchd/ovs-vsctl:
* Ports now have a "protected" flag. Protected ports can not forward
frames to other protected ports. Unprotected ports can receive and
forward frames to protected and other unprotected ports.
- ovs-vsctl, ovn-nbctl, ovn-sbctl, vtep-ctl:
* Database commands now accept integer ranges, e.g. "set port
eth0 trunks=1-10" to enable trunking VLANs 1 to 10.
v2.6.0 - 27 Sep 2016
---------------------
- First supported release of OVN. See ovn-architecture(7) for more
details.
- ovsdb-server:
* New "monitor_cond" "monitor_cond_update" and "update2" extensions to
RFC 7047.
- OpenFlow:
* OpenFlow 1.3+ bundles now expire after 10 seconds since the
last time the bundle was either opened, modified, or closed.
* OpenFlow 1.3 Extension 230, adding OpenFlow Bundles support, is
now implemented.
* OpenFlow 1.3+ bundles are now supported for group mods as well as
flow mods and port mods. Both 'atomic' and 'ordered' bundle
flags are supported for group mods as well as flow mods.
* Internal OpenFlow rule representation for load and set-field
actions is now much more memory efficient. For a complex flow
table this can reduce rule memory consumption by 40%.
* Bundles are now much more memory efficient than in OVS 2.5.
Together with memory efficiency improvements in OpenFlow rule
representation, the peak OVS resident memory use during a
bundle commit for large complex set of flow mods can be only
25% of that in OVS 2.5 (4x lower).
* OpenFlow 1.1+ OFPT_QUEUE_GET_CONFIG_REQUEST now supports OFPP_ANY.
* OpenFlow 1.4+ OFPMP_QUEUE_DESC is now supported.
* OpenFlow 1.4+ OFPT_TABLE_STATUS is now supported.
* New property-based packet-in message format NXT_PACKET_IN2 with support
for arbitrary user-provided data and for serializing flow table
traversal into a continuation for later resumption.
* New extension message NXT_SET_ASYNC_CONFIG2 to allow OpenFlow 1.4-like
control over asynchronous messages in earlier versions of OpenFlow.
* New OpenFlow extension NXM_NX_MPLS_TTL to provide access to MPLS TTL.
* New output option, output(port=N,max_len=M), to allow truncating a
packet to size M bytes when outputting to port N.
* New command OFPGC_ADD_OR_MOD for OFPT_GROUP_MOD message that adds a
new group or modifies an existing groups
* The optional OpenFlow packet buffering feature is deprecated in
this release, and will be removed in the next OVS release
(2.7). After the change OVS always sends the 'buffer_id' as
0xffffffff in packet-in messages and will send an error
response if any other value of this field is included in
packet-out and flow mod sent by a controller. Controllers are
already expected to work properly in cases where the switch can
not buffer packets, so this change should not affect existing
users.
* New OpenFlow extension NXT_CT_FLUSH_ZONE to flush conntrack zones.
- Improved OpenFlow version compatibility for actions:
* New OpenFlow extension to support the "group" action in OpenFlow 1.0.
* OpenFlow 1.0 "enqueue" action now properly translated to OpenFlow 1.1+.
* OpenFlow 1.1 "mod_nw_ecn" and OpenFlow 1.1+ "mod_nw_ttl" actions now
properly translated to OpenFlow 1.0.
- ovs-ofctl:
* queue-get-config command now allows a queue ID to be specified.
* '--bundle' option can now be used with OpenFlow 1.3 and with group mods.
* New "bundle" command allows executing a mixture of flow and group mods
as a single atomic transaction.
* New option "--color" to produce colorized output for some commands.
* New option '--may-create' to use OFPGC_ADD_OR_MOD in mod-group command.
- IPFIX:
* New "sampling_port" option for "sample" action to allow sampling
ingress and egress tunnel metadata with IPFIX.
* New ovs-ofctl commands "dump-ipfix-bridge" and "dump-ipfix-flow" to
dump bridge IPFIX statistics and flow based IPFIX statistics.
* New setting other-config:virtual_obs_id to add an arbitrary string
to IPFIX records.
- Linux:
* OVS Linux datapath now implements Conntrack NAT action with all
supported Linux kernels.
* Support for truncate action.
* New QoS type "linux-noop" that prevents Open vSwitch from trying to
manage QoS for a given port (useful when other software manages QoS).
- DPDK:
* New option "n_rxq" for PMD interfaces.
Old 'other_config:n-dpdk-rxqs' is no longer supported.
Not supported by vHost interfaces. For them number of rx and tx queues
is applied from connected virtio device.
* New 'other_config:pmd-rxq-affinity' field for PMD interfaces, that
allows to pin port's rx queues to desired cores.
* New appctl command 'dpif-netdev/pmd-rxq-show' to check the port/rxq
assignment.
* Type of log messages from PMD threads changed from INFO to DBG.
* QoS functionality with sample egress-policer implementation.
* The mechanism for configuring DPDK has changed to use database
* Sensible defaults have been introduced for many of the required
configuration options
* DB entries have been added for many of the DPDK EAL command line
arguments. Additional arguments can be passed via the dpdk-extra
entry.
* Add ingress policing functionality.
* PMD threads servicing vHost User ports can now come from the NUMA
node that device memory is located on if CONFIG_RTE_LIBRTE_VHOST_NUMA
is enabled in DPDK.
* Basic connection tracking for the userspace datapath (no ALG,
fragmentation or NAT support yet)
* Support for DPDK 16.07
* Optional support for DPDK pdump enabled.
* Jumbo frame support
* Remove dpdkvhostcuse port type.
* OVS client mode for vHost and vHost reconnect (Requires QEMU 2.7)
* 'dpdkvhostuserclient' port type.
- Increase number of registers to 16.
- ovs-benchmark: This utility has been removed due to lack of use and
bitrot.
- ovs-appctl:
* New "vlog/close" command.
- ovs-ctl:
* Added the ability to selectively start the forwarding and database
functions (ovs-vswitchd and ovsdb-server, respectively).
- ovsdb-server:
* Remove max number of sessions limit, to enable connection scaling
testing.
- python:
* Added support for Python 3.4+ in addition to existing support
for 2.7+.
- SELinux:
* Introduced SELinux policy package.
- Datapath Linux kernel compatibility.
* Dropped support for kernel older than 3.10.
* Removed VLAN splinters feature.
* Datapath supports kernel upto 4.7.
- Tunnels:
* Flow based tunnel match and action can be used for IPv6 address using
tun_ipv6_src, tun_ipv6_dst fields.
* Added support for IPv6 tunnels, for details checkout FAQ.
* Deprecated support for IPsec tunnels ports.
- A wrapper script, 'ovs-tcpdump', to easily port-mirror an OVS port and
watch with tcpdump
- Introduce --no-self-confinement flag that allows daemons to work with
sockets outside their run directory.
- ovs-pki: Changed message digest algorithm from SHA-1 to SHA-512 because
SHA-1 is no longer secure and some operating systems have started to
disable it in OpenSSL.
- Add 'mtu_request' column to the Interface table. It can be used to
configure the MTU of the ports.
Known issues:
- Using openvswitch module in conjunction with upstream Linux tunnels:
* When using the openvswitch module distributed with OVS against kernel
versions 4.4 to 4.6, the openvswitch module cannot be loaded or used at
the same time as "ip_gre".
- Conntrack FTP ALGs: When using the openvswitch module distributed with
OVS, particular Linux distribution kernels versions may provide diminished
functionality. This typically affects active FTP data connections when
using "actions=ct(alg=ftp),..." in flow tables. Specifically:
* Centos 7.1 kernels (3.10.0-2xx) kernels are unable to correctly set
up expectations for FTP data connections in multiple zones,
eg "actions=ct(zone=1,alg=ftp),ct(zone=2,alg=ftp),...". Executing the
"ct" action for subsequent data connections may fail to determine that
the data connection is "related" to an existing connection.
* Centos 7.2 kernels (3.10.0-3xx) kernels may not establish FTP ALG state
correctly for NATed connections. As a result, flows that perform NAT,
eg "actions=ct(nat,ftp=alg,table=1),..." may fail to NAT the packet,
and will populate the "ct_state=inv" bit in the flow.
v2.5.0 - 26 Feb 2016
---------------------
- Dropped support for Python older than version 2.7. As a consequence,
using Open vSwitch 2.5 or later on XenServer 6.5 or earlier (which
have Python 2.4) requires first installing Python 2.7.
- OpenFlow:
* Group chaining (where one OpenFlow group triggers another) is
now supported.
* OpenFlow 1.4+ "importance" is now considered for flow eviction.
* OpenFlow 1.4+ OFPTC_EVICTION is now implemented.
* OpenFlow 1.4+ OFPTC_VACANCY_EVENTS is now implemented.
* OpenFlow 1.4+ OFPMP_TABLE_DESC is now implemented.
* Allow modifying the ICMPv4/ICMPv6 type and code fields.
* OpenFlow 1.4+ OFPT_SET_ASYNC_CONFIG and OFPT_GET_ASYNC_CONFIG are
now implemented.
- ovs-ofctl:
* New "out_group" keyword for OpenFlow 1.1+ matching on output group.
- Tunnels:
* Geneve tunnels can now match and set options and the OAM bit.
* The nonstandard GRE64 tunnel extension has been dropped.
- Support Multicast Listener Discovery (MLDv1 and MLDv2).
- Add 'symmetric_l3l4' and 'symmetric_l3l4+udp' hash functions.
- sFlow agent now reports tunnel and MPLS structures.
- New 'check-system-userspace', 'check-kmod' and 'check-kernel' Makefile
targets to run a new system testsuite. These tests can be run inside
a Vagrant box. See INSTALL.md for details
- Mark --syslog-target argument as deprecated. It will be removed in
the next OVS release.
- Added --user option to all daemons
- Add support for connection tracking through the new "ct" action
and "ct_state"/"ct_zone"/"ct_mark"/"ct_label" match fields. Only
available on Linux kernels with the connection tracking module loaded.
- Add experimental version of OVN. OVN, the Open Virtual Network, is a
system to support virtual network abstraction. OVN complements the
existing capabilities of OVS to add native support for virtual network
abstractions, such as virtual L2 and L3 overlays and security groups.
- RHEL packaging:
* DPDK ports may now be created via network scripts (see README.RHEL).
- DPDK:
* Requires DPDK 2.2
* Added multiqueue support to vhost-user
* Note: QEMU 2.5+ required for multiqueue support
v2.4.0 - 20 Aug 2015
---------------------
- Flow table modifications are now atomic, meaning that each packet
now sees a coherent version of the OpenFlow pipeline. For
example, if a controller removes all flows with a single OpenFlow
"flow_mod", no packet sees an intermediate version of the OpenFlow
pipeline where only some of the flows have been deleted.
- Added support for SFQ, FQ_CoDel and CoDel qdiscs.
- Add bash command-line completion support for ovs-vsctl Please check
utilities/ovs-command-compgen.INSTALL.md for how to use.
- The MAC learning feature now includes per-port fairness to mitigate
MAC flooding attacks.
- New support for a "conjunctive match" OpenFlow extension, which
allows constructing OpenFlow matches of the form "field1 in
{a,b,c...} AND field2 in {d,e,f...}" and generalizations. For details,
see documentation for the "conjunction" action in ovs-ofctl(8).
- Add bash command-line completion support for ovs-appctl/ovs-dpctl/
ovs-ofctl/ovsdb-tool commands. Please check
utilities/ovs-command-compgen.INSTALL.md for how to use.
- The "learn" action supports a new flag "delete_learned" that causes
the learned flows to be deleted when the flow with the "learn" action
is deleted.
- Basic support for the Geneve tunneling protocol. It is not yet
possible to generate or match options. This is planned for a future
release. The protocol is documented at