diff --git a/neutron_lib/api/definitions/__init__.py b/neutron_lib/api/definitions/__init__.py
index b6d2b3079..6ce4ff695 100644
--- a/neutron_lib/api/definitions/__init__.py
+++ b/neutron_lib/api/definitions/__init__.py
@@ -20,6 +20,7 @@ from neutron_lib.api.definitions import bgpvpn_routes_control
 from neutron_lib.api.definitions import bgpvpn_vni
 from neutron_lib.api.definitions import data_plane_status
 from neutron_lib.api.definitions import default_subnetpools
+from neutron_lib.api.definitions import dhcpagentscheduler
 from neutron_lib.api.definitions import dns
 from neutron_lib.api.definitions import dns_domain_ports
 from neutron_lib.api.definitions import dvr
@@ -83,6 +84,7 @@ _ALL_API_DEFINITIONS = {
     bgpvpn_vni,
     data_plane_status,
     default_subnetpools,
+    dhcpagentscheduler,
     dns,
     dns_domain_ports,
     dvr,
diff --git a/neutron_lib/api/definitions/dhcpagentscheduler.py b/neutron_lib/api/definitions/dhcpagentscheduler.py
new file mode 100644
index 000000000..1eb0ff84a
--- /dev/null
+++ b/neutron_lib/api/definitions/dhcpagentscheduler.py
@@ -0,0 +1,65 @@
+# Copyright (c) 2013 OpenStack Foundation.
+# All rights reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from neutron_lib.api.definitions import agent as agent_apidef
+from neutron_lib.api.definitions import network as net_apidef
+from neutron_lib import constants
+
+
+DHCP_NET = 'dhcp-network'
+DHCP_NETS = DHCP_NET + 's'
+DHCP_AGENT = 'dhcp-agent'
+DHCP_AGENTS = DHCP_AGENT + 's'
+
+ALIAS = constants.DHCP_AGENT_SCHEDULER_EXT_ALIAS
+LABEL = ''
+IS_SHIM_EXTENSION = False
+IS_STANDARD_ATTR_EXTENSION = False
+NAME = 'DHCP Agent Scheduler'
+API_PREFIX = ''
+DESCRIPTION = 'Schedule networks among dhcp agents'
+UPDATED_TIMESTAMP = '2013-02-07T10:00:00-00:00'
+RESOURCE_ATTRIBUTE_MAP = {}
+SUB_RESOURCE_ATTRIBUTE_MAP = {
+    DHCP_NETS: {
+        'parent': {
+            'collection_name': agent_apidef.COLLECTION_NAME,
+            'member_name': agent_apidef.RESOURCE_NAME
+        },
+        'parameters': {
+            'network_id': {
+                'allow_post': True, 'allow_put': False,
+                'default': constants.ATTR_NOT_SPECIFIED,
+                'enforce_policy': True,
+                'is_visible': True,
+                'validate': {'type:uuid': None}
+            }
+        }
+    },
+    DHCP_AGENTS: {
+        'parent': {
+            'collection_name': net_apidef.COLLECTION_NAME,
+            'member_name': net_apidef.RESOURCE_NAME
+        },
+        # NOTE(boden): the reference implementation only allows the index
+        # operation for the agent exposed under the network resource
+        'parameters': agent_apidef.RESOURCE_ATTRIBUTE_MAP[
+            agent_apidef.COLLECTION_NAME]
+    }
+}
+ACTION_MAP = {}
+REQUIRED_EXTENSIONS = [agent_apidef.ALIAS]
+OPTIONAL_EXTENSIONS = []
+ACTION_STATUS = {}
diff --git a/neutron_lib/exceptions/dhcpagentscheduler.py b/neutron_lib/exceptions/dhcpagentscheduler.py
new file mode 100644
index 000000000..808cf4d22
--- /dev/null
+++ b/neutron_lib/exceptions/dhcpagentscheduler.py
@@ -0,0 +1,32 @@
+# Copyright (c) 2013 OpenStack Foundation.
+# All rights reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from neutron_lib._i18n import _
+from neutron_lib import exceptions
+from neutron_lib.exceptions import agent as agent_exc
+
+
+class InvalidDHCPAgent(agent_exc.AgentNotFound):
+    message = _("Agent %(id)s is not a valid DHCP Agent or has been disabled.")
+
+
+class NetworkHostedByDHCPAgent(exceptions.Conflict):
+    message = _("The network %(network_id)s has been already hosted"
+                " by the DHCP Agent %(agent_id)s.")
+
+
+class NetworkNotHostedByDhcpAgent(exceptions.Conflict):
+    message = _("The network %(network_id)s is not hosted"
+                " by the DHCP Agent %(agent_id)s.")
diff --git a/neutron_lib/tests/unit/api/definitions/test_dhcpagentscheduler.py b/neutron_lib/tests/unit/api/definitions/test_dhcpagentscheduler.py
new file mode 100644
index 000000000..ca733c334
--- /dev/null
+++ b/neutron_lib/tests/unit/api/definitions/test_dhcpagentscheduler.py
@@ -0,0 +1,23 @@
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from neutron_lib.api.definitions import dhcpagentscheduler
+from neutron_lib.tests.unit.api.definitions import base
+from neutron_lib.tests.unit.api.definitions import test_agent as agent
+
+
+class DHCPAgentSchedulerDefinitionTestCase(base.DefinitionBaseTestCase):
+    extension_module = dhcpagentscheduler
+    extension_resources = agent.AgentDefinitionTestCase.extension_resources
+    extension_attributes = agent.AgentDefinitionTestCase.extension_attributes
+    extension_subresources = (dhcpagentscheduler.DHCP_AGENTS,
+                              dhcpagentscheduler.DHCP_NETS)
diff --git a/releasenotes/notes/rehome-dhcpagentscheduler-apidef-1f7729fb5834dcd2.yaml b/releasenotes/notes/rehome-dhcpagentscheduler-apidef-1f7729fb5834dcd2.yaml
new file mode 100644
index 000000000..be5619252
--- /dev/null
+++ b/releasenotes/notes/rehome-dhcpagentscheduler-apidef-1f7729fb5834dcd2.yaml
@@ -0,0 +1,5 @@
+---
+features:
+  - The ``dhcp_agent_scheduler`` extension's API defintion is now available
+    in ``neutron_lib.api.definitions.dhcpagentscheduler`` and the corresponding
+    exceptions in ``neutron_lib.exceptions.dhcpagentscheduler``.