release-notes: mention breaking changes w/r/t `systemd-networkd` 250

2 files changed, 47 insertions, 0 deletions

diff --git a/nixos/doc/manual/from_md/release-notes/rl-2211.section.xml b/nixos/doc/manual/from_md/release-notes/rl-2211.section.xml
index 78bd6c6a22d84..aa79083d10659 100644
--- a/nixos/doc/manual/from_md/release-notes/rl-2211.section.xml
+++ b/nixos/doc/manual/from_md/release-notes/rl-2211.section.xml
@@ -580,6 +580,47 @@
       </listitem>
       <listitem>
         <para>
+          <literal>systemd-networkd</literal> v250 deprecated, renamed,
+          and moved some sections and settings which leads to the
+          following breaking module changes:
+        </para>
+        <itemizedlist spacing="compact">
+          <listitem>
+            <para>
+              <literal>systemd.network.networks.&lt;name&gt;.dhcpV6PrefixDelegationConfig</literal>
+              is renamed to
+              <literal>systemd.network.networks.&lt;name&gt;.dhcpPrefixDelegationConfig</literal>.
+            </para>
+          </listitem>
+          <listitem>
+            <para>
+              <literal>systemd.network.networks.&lt;name&gt;.dhcpV6Config</literal>
+              no longer accepts the
+              <literal>ForceDHCPv6PDOtherInformation=</literal> setting.
+              Please use the <literal>WithoutRA=</literal> and
+              <literal>UseDelegatedPrefix=</literal> settings in your
+              <literal>systemd.network.networks.&lt;name&gt;.dhcpV6Config</literal>
+              and the <literal>DHCPv6Client=</literal> setting in your
+              <literal>systemd.network.networks.&lt;name&gt;.ipv6AcceptRAConfig</literal>
+              to control when the DHCPv6 client is started and how the
+              delegated prefixes are handled by the DHCPv6 client.
+            </para>
+          </listitem>
+          <listitem>
+            <para>
+              <literal>systemd.network.networks.&lt;name&gt;.networkConfig</literal>
+              no longer accepts the <literal>IPv6Token=</literal>
+              setting. Use the <literal>Token=</literal> setting in your
+              <literal>systemd.network.networks.&lt;name&gt;.ipv6AcceptRAConfig</literal>
+              instead. The
+              <literal>systemd.network.networks.&lt;name&gt;.ipv6Prefixes.*.ipv6PrefixConfig</literal>
+              now also accepts the <literal>Token=</literal> setting.
+            </para>
+          </listitem>
+        </itemizedlist>
+      </listitem>
+      <listitem>
+        <para>
           The <literal>meta.mainProgram</literal> attribute of packages
           in <literal>wineWowPackages</literal> now defaults to
           <literal>&quot;wine64&quot;</literal>.
diff --git a/nixos/doc/manual/release-notes/rl-2211.section.md b/nixos/doc/manual/release-notes/rl-2211.section.md
index 37b0db8a8ce10..3c2560df713fb 100644
--- a/nixos/doc/manual/release-notes/rl-2211.section.md
+++ b/nixos/doc/manual/release-notes/rl-2211.section.md
@@ -194,6 +194,12 @@ Available as [services.patroni](options.html#opt-services.patroni.enable).
 
 - The `aws` package has been removed due to being abandoned by the upstream. It is recommended to use `awscli` or `awscli2` instead.
 
+- `systemd-networkd` v250 deprecated, renamed, and moved some sections and settings which leads to the following breaking module changes:
+
+   * `systemd.network.networks.<name>.dhcpV6PrefixDelegationConfig` is renamed to `systemd.network.networks.<name>.dhcpPrefixDelegationConfig`.
+   * `systemd.network.networks.<name>.dhcpV6Config` no longer accepts the `ForceDHCPv6PDOtherInformation=` setting. Please use the `WithoutRA=` and `UseDelegatedPrefix=` settings in your `systemd.network.networks.<name>.dhcpV6Config` and the `DHCPv6Client=` setting in your `systemd.network.networks.<name>.ipv6AcceptRAConfig` to control when the DHCPv6 client is started and how the delegated prefixes are handled by the DHCPv6 client.
+   * `systemd.network.networks.<name>.networkConfig` no longer accepts the `IPv6Token=` setting. Use the `Token=` setting in your `systemd.network.networks.<name>.ipv6AcceptRAConfig` instead. The `systemd.network.networks.<name>.ipv6Prefixes.*.ipv6PrefixConfig` now also accepts the `Token=` setting.
+
 - The `meta.mainProgram` attribute of packages in `wineWowPackages` now defaults to `"wine64"`.
 
 - The `paperless` module now defaults `PAPERLESS_TIME_ZONE` to your configured system timezone.