diff --git a/ironic/db/sqlalchemy/alembic/versions/4c8356c965f1_index_on_ports_node_id.py b/ironic/db/sqlalchemy/alembic/versions/4c8356c965f1_index_on_ports_node_id.py
new file mode 100644
index 0000000000..adf8637253
--- /dev/null
+++ b/ironic/db/sqlalchemy/alembic/versions/4c8356c965f1_index_on_ports_node_id.py
@@ -0,0 +1,27 @@
+#    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.
+"""Add index on ports.node_id
+
+Revision ID: 4c8356c965f1
+Revises: 1c14278d6e33
+Create Date: 2025-04-29 13:26:23.089464
+
+"""
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision = '4c8356c965f1'
+down_revision = '1c14278d6e33'
+
+
+def upgrade():
+    op.create_index('ports_node_id_idx', 'ports', ['node_id'])
diff --git a/ironic/db/sqlalchemy/models.py b/ironic/db/sqlalchemy/models.py
index e5ecc8fc58..49404e4a7b 100644
--- a/ironic/db/sqlalchemy/models.py
+++ b/ironic/db/sqlalchemy/models.py
@@ -256,6 +256,7 @@ class Port(Base):
         schema.UniqueConstraint('address', name='uniq_ports0address'),
         schema.UniqueConstraint('uuid', name='uniq_ports0uuid'),
         schema.UniqueConstraint('name', name='uniq_ports0name'),
+        Index('ports_node_id_idx', 'node_id'),
         table_args())
     id = Column(Integer, primary_key=True)
     uuid = Column(String(36))