diff --git a/neutron/conf/common.py b/neutron/conf/common.py
index c820b3c5d78..30b09a14aab 100644
--- a/neutron/conf/common.py
+++ b/neutron/conf/common.py
@@ -77,7 +77,12 @@ core_opts = [
                        "without providing a CIDR or subnetpool ID will be "
                        "given a CIDR via the Prefix Delegation mechanism. "
                        "Note that enabling PD will override the behavior of "
-                       "the default IPv6 subnetpool.")),
+                       "the default IPv6 subnetpool."),
+                deprecated_for_removal=True,
+                deprecated_since='2023.2',
+                deprecated_reason=("The Dibbler client used for this feature "
+                                   "is no longer maintained. See LP#1916428"),
+                ),
     cfg.IntOpt('dhcp_lease_duration', default=86400,
                help=_("DHCP lease duration (in seconds). Use -1 to tell "
                       "dnsmasq to use infinite lease times.")),
diff --git a/neutron/conf/experimental.py b/neutron/conf/experimental.py
index 463ab4a88ba..dbb13ec8206 100644
--- a/neutron/conf/experimental.py
+++ b/neutron/conf/experimental.py
@@ -17,11 +17,16 @@ from neutron._i18n import _
 
 EXPERIMENTAL_CFG_GROUP = 'experimental'
 EXPERIMENTAL_LINUXBRIDGE = 'linuxbridge'
+EXPERIMENTAL_IPV6_PD = 'ipv6_pd_enabled'
 experimental_opts = [
     cfg.BoolOpt(EXPERIMENTAL_LINUXBRIDGE,
                 default=False,
                 help=_('Enable execution of the experimental Linuxbridge '
                        'agent.')),
+    cfg.BoolOpt(EXPERIMENTAL_IPV6_PD,
+                default=False,
+                help=_('Enable execution of the experimental IPv6 Prefix '
+                       'Delegation functionality in the L3 agent.')),
 ]
 
 
diff --git a/neutron/db/db_base_plugin_v2.py b/neutron/db/db_base_plugin_v2.py
index d80e7b3fc7f..95a7d2277ea 100644
--- a/neutron/db/db_base_plugin_v2.py
+++ b/neutron/db/db_base_plugin_v2.py
@@ -51,8 +51,10 @@ from sqlalchemy import not_
 from neutron._i18n import _
 from neutron.api.rpc.agentnotifiers import l3_rpc_agent_api
 from neutron.common import _constants
+from neutron.common import experimental
 from neutron.common import ipv6_utils
 from neutron.common import utils
+from neutron.conf import experimental as c_exp
 from neutron.db import db_base_plugin_common
 from neutron.db import ipam_pluggable_backend
 from neutron.db import models_v2
@@ -156,7 +158,17 @@ class NeutronDbPluginV2(db_base_plugin_common.DbBasePluginCommon,
             result_filters=None)
         return super(NeutronDbPluginV2, cls).__new__(cls, *args, **kwargs)
 
+    @staticmethod
+    def _validate_ipv6_pd():
+        try:
+            if cfg.CONF.ipv6_pd_enabled:
+                experimental.validate_experimental_enabled(
+                    c_exp.EXPERIMENTAL_IPV6_PD)
+        except cfg.NoSuchOptError:
+            return
+
     def __init__(self):
+        self._validate_ipv6_pd()
         self.set_ipam_backend()
         if (cfg.CONF.notify_nova_on_port_status_changes or
                 cfg.CONF.notify_nova_on_port_data_changes):
diff --git a/releasenotes/notes/mark_ipv6_pd_enabled_as_experimental-c9bfe343a0beb334.yaml b/releasenotes/notes/mark_ipv6_pd_enabled_as_experimental-c9bfe343a0beb334.yaml
new file mode 100644
index 00000000000..b340343261d
--- /dev/null
+++ b/releasenotes/notes/mark_ipv6_pd_enabled_as_experimental-c9bfe343a0beb334.yaml
@@ -0,0 +1,7 @@
+---
+deprecations:
+  - |
+    "ipv6_pd_enabled" has been marked as deprecated and marked as experimental.
+    To continue using it, deployers have to set to True the "ipv6_pd_enabled"
+    option in the "experimental" section of neutron.conf. See
+    `Dibbler project concluded <https://bugs.launchpad.net/neutron/+bug/1916428>`_.