diff --git a/openstackclient/compute/v2/server.py b/openstackclient/compute/v2/server.py
index e5a7a32833..5370a63f81 100644
--- a/openstackclient/compute/v2/server.py
+++ b/openstackclient/compute/v2/server.py
@@ -354,6 +354,14 @@ class AddPort(command.Command):
             metavar="<port>",
             help=_("Port to add to the server (name or ID)"),
         )
+        parser.add_argument(
+            '--tag',
+            metavar='<tag>',
+            help=_(
+                "Tag for the attached interface. "
+                "(Supported by API versions '2.49' - '2.latest')"
+            )
+        )
         return parser
 
     def take_action(self, parsed_args):
@@ -369,7 +377,22 @@ class AddPort(command.Command):
         else:
             port_id = parsed_args.port
 
-        server.interface_attach(port_id=port_id, net_id=None, fixed_ip=None)
+        kwargs = {
+            'port_id': port_id,
+            'net_id': None,
+            'fixed_ip': None,
+        }
+
+        if parsed_args.tag:
+            if compute_client.api_version < api_versions.APIVersion("2.49"):
+                msg = _(
+                    '--os-compute-api-version 2.49 or greater is required to '
+                    'support the --tag option'
+                )
+                raise exceptions.CommandError(msg)
+            kwargs['tag'] = parsed_args.tag
+
+        server.interface_attach(**kwargs)
 
 
 class AddNetwork(command.Command):
diff --git a/openstackclient/tests/unit/compute/v2/test_server.py b/openstackclient/tests/unit/compute/v2/test_server.py
index 59282b4a12..c16bb333f7 100644
--- a/openstackclient/tests/unit/compute/v2/test_server.py
+++ b/openstackclient/tests/unit/compute/v2/test_server.py
@@ -465,6 +465,59 @@ class TestServerAddPort(TestServer):
         self._test_server_add_port('fake-port')
         self.find_port.assert_not_called()
 
+    def test_server_add_port_with_tag(self):
+        self.app.client_manager.compute.api_version = api_versions.APIVersion(
+            '2.49')
+
+        servers = self.setup_servers_mock(count=1)
+        self.find_port.return_value.id = 'fake-port'
+        arglist = [
+            servers[0].id,
+            'fake-port',
+            '--tag', 'tag1',
+        ]
+        verifylist = [
+            ('server', servers[0].id),
+            ('port', 'fake-port'),
+            ('tag', 'tag1'),
+        ]
+        parsed_args = self.check_parser(self.cmd, arglist, verifylist)
+
+        result = self.cmd.take_action(parsed_args)
+        self.assertIsNone(result)
+
+        servers[0].interface_attach.assert_called_once_with(
+            port_id='fake-port',
+            net_id=None,
+            fixed_ip=None,
+            tag='tag1')
+
+    def test_server_add_port_with_tag_pre_v249(self):
+        self.app.client_manager.compute.api_version = api_versions.APIVersion(
+            '2.48')
+
+        servers = self.setup_servers_mock(count=1)
+        self.find_port.return_value.id = 'fake-port'
+        arglist = [
+            servers[0].id,
+            'fake-port',
+            '--tag', 'tag1',
+        ]
+        verifylist = [
+            ('server', servers[0].id),
+            ('port', 'fake-port'),
+            ('tag', 'tag1'),
+        ]
+        parsed_args = self.check_parser(self.cmd, arglist, verifylist)
+
+        ex = self.assertRaises(
+            exceptions.CommandError,
+            self.cmd.take_action,
+            parsed_args)
+        self.assertIn(
+            '--os-compute-api-version 2.49 or greater is required',
+            str(ex))
+
 
 class TestServerVolume(TestServer):
 
diff --git a/releasenotes/notes/add-tag-support-server-add-port-7e30aa38202d0839.yaml b/releasenotes/notes/add-tag-support-server-add-port-7e30aa38202d0839.yaml
new file mode 100644
index 0000000000..a5a63128c7
--- /dev/null
+++ b/releasenotes/notes/add-tag-support-server-add-port-7e30aa38202d0839.yaml
@@ -0,0 +1,5 @@
+---
+features:
+  - Add ``--tag`` option to ``server add port`` command when
+    add a port to server. Only available starting with
+    ``--os-compute-api-version 2.49``.