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Add OVN 25.03 release.
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‎src/content/releases/25.03.md

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title = "25.03"
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weight = 251660942438.0
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## OVN 25.03
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OVN 25.03 was initially released on 7 March, 2025.
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This version of OVN is currently supported for all bug fixes.
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Support for this version will end on 7 March, 2026.
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### v25.03.0
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v25.03.0 was released on 7 March, 2025.
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[Github link](https://github.com/ovn-org/ovn/releases/tag/v25.03.0)
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Release Notes:
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```
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OVN v25.03.0 - 07 Mar 2025
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--------------------------
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- Added support to choose selection methods - dp_hash or
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hash (with specified hash fields) for ECMP routes
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while choosing nexthop.
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- ovn-ic: Add support for route tag to prevent route learning.
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- Support for STT tunnels in ovn-encap-type is deprecated and will be
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removed in the next release.
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- The LRP option 'centralize_routing' has been removed. The behavior is now
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enabled in all cases where it is needed.
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- ovn-nb: Changed schema of ovn-nb to make networks optional within Logical
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Router Ports.
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- Added support for Spine-Leaf topology of logical switches by adding
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a new LSP type 'switch' that can directly connect two logical switches.
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Supported for both distributed and transit switches.
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- Bump python version required for building OVN to 3.7.
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- SSL/TLS:
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* TLSv1 and TLSv1.1 protocols are deprecated and disabled by default
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on OpenFlow and database connections. Use --ssl-protocols to turn
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them back on. Support will be fully removed in the next release.
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* OpenSSL 1.1.1 or newer is now required for SSL/TLS support.
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* The protocol list in --ssl-protocols or corresponding database column
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now supports specifying simple protocol ranges like:
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- "TLSv1-TLSv1.2" to enable all protocols between TLSv1 and TLSv1.2.
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- "TLSv1.2+" to enable protocol TLSv1.2 and later.
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The value must be a list of protocols or exactly one protocol range.
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* Added explicit support for TLSv1.3. It can now be enabled via
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--ssl-protocols (TLSv1.3 was supported in earlier versions only when
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this option was not set). TLS ciphersuites for TLSv1.3 and later can
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be configured via --ssl-ciphersuites (--ssl-ciphers only applies to
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TLSv1.2 and earlier).
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- Add "arp-nd-max-timeout-sec" config option to vswitchd external-ids to
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configure the interval (in seconds) between ovn-controller originated
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ARP/ND packets used for tracking ECMP next hop MAC addresses.
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- Auto flush ECMP symmetric reply connection states when an ECMP route is
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removed by the CMS. This behavior is controlled by the
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"ecmp_nexthop_monitor_enable" config option in the NB_Global table.
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Disabled by default.
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- Improved handling of IPv6 traffic by enabling address prefix tracking
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in OVS for both IPv4 and IPv6 addresses, whenever possible, reducing
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the amount of IPv6 datapath flows.
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- Add concept of Transit Routers, users are now allowed to specify
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options:requested-chassis for router ports; if the chassis is remote
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then the router port will behave as a remote port.
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- Added a new ACL option "persist-established" that allows for
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established connections to bypass ACL matching. This way, if an ACL
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match changes, traffic on the established connection can still pass.
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- Logical router policies can now be arranged in chains. Using the new
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"jump" action, combined with new "chain" and "jump_chain" columns,
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allows for policies to be chained together.
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- Reduce the max number of local datapath to 1024 when OVN is using VXLAN
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encapsulation type in OVN-interconnect mode.
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- Added vxlan_mode parameter in IC_NB_GLOBAL option column to enable or
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disable VXLAN encapsulation type in OVN-interconnect mode.
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- Dynamic Routing:
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* Add the option "dynamic-routing" to Logical Routers. If set to true
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static and connected routes matching the filter below are shared to the
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southbound "Advertised_Route" table for sharing outside of OVN.
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The routes can further be configured by setting
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`dynamic-routing-redistribute` on the LR or LRP. The LRP settings
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overwrite the LR settings for all routes using this interface to
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forward traffic on.
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* Allow Logical Routers to dynamically learn routes from outside the
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fabric. Routes entered into the "Learned_Route" table in the southbound
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database will be learned by the respective LR. They are included in the
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route table with a lower priority than static routes.
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* Add the option value "connected-as-host" to the
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"dynamic-routing-redistribute" LR and LRP option. If set then connected
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routes are announced as individual host routes.
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* Add the option "dynamic-routing-maintain-vrf" to LRPs. If set the
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ovn-controller will create a vrf named "ovnvrf" + datapath id that
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includes all advertised and learned routes.
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The vrf name can be overwritten with the "dynamic-routing-vrf-name"
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setting.
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* Add the option "dynamic-routing-port-name" to LRPs. If set only routes
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learned from a linux interfaces that is locally bound to the referenced
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LSP will be learned. Additionally support local overwrites for arbitrary
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interface names using "dynamic-routing-port-mapping".
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* The logical router port options "routing-protocol-redirect" and
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"routing-protocols" are now also usable on distributed gateway ports.
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* Logical router port options "routing-protocol-redirect" and
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"routing-protocols" are now considered stable. Their "experimental" tag
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was removed.
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- Add "options:ct-commit-all" to LR, that enables commit of all traffic
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to DNAT and SNAT zone when LR is stateful.
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```
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[Changelog](../changelog_v25.03.0)

‎src/content/releases/_index.en.md

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### Latest OVN release Series
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The most recent series of OVN released is 24.09. Use this version
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The most recent series of OVN released is 25.03. Use this version
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if you are interested in trying out the latest release of OVN with the most
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up-to-date features and performance improvements.
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You can find more information, including download links, release notes and
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changelogs for this series [here](24.09).
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changelogs for this series [here](25.03).
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### Long Term Support
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Standard term support series are given full bug fix support for one year from
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the initial date of release. After this, they no longer receive any support.
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The most recent standard term support series of OVN is 24.09.
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The most recent standard term support series of OVN is 25.03.
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You can find more information, including download links, release notes and
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changelogs for this series [here](24.09).
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changelogs for this series [here](25.03).
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### Other Releases
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For all other releases, see the [All Releases](all_releases) page.
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For all other releases, see the [All Releases](all_releases) page.

‎src/content/releases/all_releases.md

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## Supported Releases
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The following OVN release series are still receiving upstream support.
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### OVN 25.03
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For more details, see [25.03 ](../25.03)
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### OVN 24.09
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For more details, see [24.09 ](../24.09)
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