diff --git a/doc/source/admin/drivers/redfish.rst b/doc/source/admin/drivers/redfish.rst
index 2e5a50a2b4..f784740dc8 100644
--- a/doc/source/admin/drivers/redfish.rst
+++ b/doc/source/admin/drivers/redfish.rst
@@ -185,6 +185,29 @@ property can be used to pass user-specified kernel command line parameters.
 For ramdisk kernel, ``[instance_info]/kernel_append_params`` property serves
 the same purpose.
 
+Virtual Media Ramdisk
+~~~~~~~~~~~~~~~~~~~~~
+
+The ``ramdisk`` deploy interface can be used in concert with the the
+``redfish-virtual-media`` boot interface to facilitate the boot of a remote
+node utilizing pre-supplied virtual media.
+
+Instead of supplying an ``[instance_info]/image_source`` parameter, a
+``[instance_info]/boot_iso`` parameter can be supplied. The image will
+be downloaded by the conductor, and the instance will be booted using
+the supplied ISO image. In accordance with the ``ramdisk`` deployment
+interface behavior, once booted the machine will have a ``provision_state``
+of ``ACTIVE``.
+
+.. code-block:: bash
+
+  openstack baremetal node set \
+      --instance_info boot_iso=http://url/to.iso node-0
+
+This initial interface does not support bootloader configuration
+parameter injection, as such the ``[instance_info]/kernel_append_params``
+setting is ignored.
+
 .. _Redfish: http://redfish.dmtf.org/
 .. _Sushy: https://opendev.org/openstack/sushy
 .. _TLS: https://en.wikipedia.org/wiki/Transport_Layer_Security
diff --git a/ironic/common/images.py b/ironic/common/images.py
index f1dc7ad15a..31332df761 100644
--- a/ironic/common/images.py
+++ b/ironic/common/images.py
@@ -526,7 +526,7 @@ def get_temp_url_for_glance_image(context, image_uuid):
 def create_boot_iso(context, output_filename, kernel_href,
                     ramdisk_href, deploy_iso_href=None, esp_image_href=None,
                     root_uuid=None, kernel_params=None, boot_mode=None,
-                    configdrive_href=None):
+                    configdrive_href=None, base_iso=None):
     """Creates a bootable ISO image for a node.
 
     Given the hrefs for kernel, ramdisk, root partition's UUID and
@@ -553,14 +553,26 @@ def create_boot_iso(context, output_filename, kernel_href,
     :param configdrive_href: URL to ISO9660 or FAT-formatted OpenStack config
         drive image. This image will be embedded into the built ISO image.
         Optional.
+    :param base_iso: URL or glance UUID of a to be used as an override of
+        what should be retrieved for to use, instead of building an ISO
+        bootable ramdisk.
     :raises: ImageCreationFailed, if creating boot ISO failed.
     """
     with utils.tempdir() as tmpdir:
-        kernel_path = os.path.join(tmpdir, kernel_href.split('/')[-1])
-        ramdisk_path = os.path.join(tmpdir, ramdisk_href.split('/')[-1])
-
-        fetch(context, kernel_href, kernel_path)
-        fetch(context, ramdisk_href, ramdisk_path)
+        if base_iso:
+            # NOTE(TheJulia): Eventually we want to use the creation method
+            # to perform the massaging of the image, because oddly enough
+            # we need to do all the same basic things, just a little
+            # differently.
+            fetch(context, base_iso, output_filename)
+            # Temporary, return to the caller until we support the combined
+            # operation.
+            return
+        else:
+            kernel_path = os.path.join(tmpdir, kernel_href.split('/')[-1])
+            ramdisk_path = os.path.join(tmpdir, ramdisk_href.split('/')[-1])
+            fetch(context, kernel_href, kernel_path)
+            fetch(context, ramdisk_href, ramdisk_path)
 
         if configdrive_href:
             configdrive_path = os.path.join(
@@ -592,7 +604,11 @@ def create_boot_iso(context, output_filename, kernel_href,
 
             elif CONF.esp_image:
                 esp_image_path = CONF.esp_image
-
+            # TODO(TheJulia): we should opportunisticly try to make bios
+            # bootable and UEFI. In other words, collapse a lot of this
+            # path since they are not mutually exclusive.
+            # UEFI boot mode, but Network iPXE -> ISO means bios bootable
+            # contents are still required.
             create_esp_image_for_uefi(
                 output_filename, kernel_path, ramdisk_path,
                 deploy_iso=deploy_iso_path, esp_image=esp_image_path,
diff --git a/ironic/drivers/modules/deploy_utils.py b/ironic/drivers/modules/deploy_utils.py
index 510c256346..71aaf7bc6c 100644
--- a/ironic/drivers/modules/deploy_utils.py
+++ b/ironic/drivers/modules/deploy_utils.py
@@ -511,6 +511,11 @@ def validate_image_properties(ctx, deploy_info, properties):
         the mentioned properties.
     """
     image_href = deploy_info['image_source']
+    boot_iso = deploy_info.get('boot_iso')
+    if image_href and boot_iso:
+        raise exception.InvalidParameterValue(_(
+            "An 'image_source' and 'boot_iso' parameter may not be "
+            "specified at the same time."))
     try:
         img_service = image_service.get_image_service(image_href, context=ctx)
         image_props = img_service.show(image_href)['properties']
@@ -697,11 +702,21 @@ def get_image_instance_info(node):
         instance_info. Also raises same exception if kernel/ramdisk is
         missing in instance_info for non-glance images.
     """
+    # TODO(TheJulia): We seem to have a lack of direct unit testing of this
+    # method, but that is likely okay. If memory serves we test this at
+    # a few different levels. That being said, it would be good for some
+    # more explicit unit testing to exist.
     info = {}
-    info['image_source'] = node.instance_info.get('image_source')
 
     is_whole_disk_image = node.driver_internal_info.get('is_whole_disk_image')
-    if not is_whole_disk_image:
+    boot_iso = node.instance_info.get('boot_iso')
+
+    if not boot_iso:
+        info['image_source'] = node.instance_info.get('image_source')
+    else:
+        info['boot_iso'] = boot_iso
+
+    if not is_whole_disk_image and not boot_iso:
         if not service_utils.is_glance_image(info['image_source']):
             info['kernel'] = node.instance_info.get('kernel')
             info['ramdisk'] = node.instance_info.get('ramdisk')
diff --git a/ironic/drivers/modules/redfish/boot.py b/ironic/drivers/modules/redfish/boot.py
index 8c5bfc8a98..445ee0d578 100644
--- a/ironic/drivers/modules/redfish/boot.py
+++ b/ironic/drivers/modules/redfish/boot.py
@@ -458,7 +458,7 @@ def _parse_deploy_info(node):
 
 def _prepare_iso_image(task, kernel_href, ramdisk_href,
                        bootloader_href=None, configdrive=None,
-                       root_uuid=None, params=None):
+                       root_uuid=None, params=None, base_iso=None):
     """Prepare an ISO to boot the node.
 
     Build bootable ISO out of `kernel_href` and `ramdisk_href` (and
@@ -486,23 +486,28 @@ def _prepare_iso_image(task, kernel_href, ramdisk_href,
         value.
     :raises: ImageCreationFailed, if creating ISO image failed.
     """
-    if not kernel_href or not ramdisk_href:
+    if (not kernel_href or not ramdisk_href) and not base_iso:
         raise exception.InvalidParameterValue(_(
-            "Unable to find kernel or ramdisk for "
-            "building ISO for %(node)s") %
+            "Unable to find kernel, ramdisk for "
+            "building ISO, or explicit ISO for %(node)s") %
             {'node': task.node.uuid})
 
     i_info = task.node.instance_info
 
+    # NOTE(TheJulia): Until we support modifying a base iso, most of
+    # this logic actually does nothing in the end. But it should!
     if deploy_utils.get_boot_option(task.node) == "ramdisk":
-        kernel_params = "root=/dev/ram0 text "
-        kernel_params += i_info.get("ramdisk_kernel_arguments", "")
+        if not base_iso:
+            kernel_params = "root=/dev/ram0 text "
+            kernel_params += i_info.get("ramdisk_kernel_arguments", "")
+        else:
+            kernel_params = None
 
     else:
         kernel_params = i_info.get(
             'kernel_append_params', CONF.redfish.kernel_append_params)
 
-    if params:
+    if params and not base_iso:
         kernel_params = ' '.join(
             (kernel_params, ' '.join(
                 '%s=%s' % kv for kv in params.items())))
@@ -527,7 +532,11 @@ def _prepare_iso_image(task, kernel_href, ramdisk_href,
 
             configdrive_href = configdrive
 
-            if configdrive:
+            # FIXME(TheJulia): This is treated as conditional with
+            # a base_iso as the intent, eventually, is to support
+            # injection into the supplied image.
+
+            if configdrive and not base_iso:
                 parsed_url = urlparse.urlparse(configdrive)
                 if not parsed_url.scheme:
                     cfgdrv_blob = base64.decode_as_bytes(configdrive)
@@ -549,7 +558,8 @@ def _prepare_iso_image(task, kernel_href, ramdisk_href,
                 configdrive_href=configdrive_href,
                 root_uuid=root_uuid,
                 kernel_params=kernel_params,
-                boot_mode=boot_mode)
+                boot_mode=boot_mode,
+                base_iso=base_iso)
 
             iso_object_name = _get_iso_image_name(task.node)
 
@@ -597,6 +607,9 @@ def _prepare_deploy_iso(task, params, mode):
     ramdisk_href = d_info.get('%s_ramdisk' % mode)
     bootloader_href = d_info.get('bootloader')
 
+    # TODO(TheJulia): At some point we should support something like
+    # boot_iso for the deploy interface, perhaps when we support config
+    # injection.
     prepare_iso_image = functools.partial(
         _prepare_iso_image, task, kernel_href, ramdisk_href,
         bootloader_href=bootloader_href, params=params)
@@ -656,8 +669,9 @@ def _prepare_boot_iso(task, root_uuid=None):
 
     kernel_href = node.instance_info.get('kernel')
     ramdisk_href = node.instance_info.get('ramdisk')
+    base_iso = node.instance_info.get('boot_iso')
 
-    if not kernel_href or not ramdisk_href:
+    if (not kernel_href or not ramdisk_href) and not base_iso:
 
         image_href = d_info['image_source']
 
@@ -671,17 +685,17 @@ def _prepare_boot_iso(task, root_uuid=None):
         if not ramdisk_href:
             ramdisk_href = image_properties.get('ramdisk_id')
 
-    if not kernel_href or not ramdisk_href:
-        raise exception.InvalidParameterValue(_(
-            "Unable to find kernel or ramdisk for "
-            "to generate boot ISO for %(node)s") %
-            {'node': task.node.uuid})
+        if (not kernel_href or not ramdisk_href):
+            raise exception.InvalidParameterValue(_(
+                "Unable to find kernel or ramdisk for "
+                "to generate boot ISO for %(node)s") %
+                {'node': task.node.uuid})
 
     bootloader_href = d_info.get('bootloader')
 
     return _prepare_iso_image(
         task, kernel_href, ramdisk_href, bootloader_href,
-        root_uuid=root_uuid)
+        root_uuid=root_uuid, base_iso=base_iso)
 
 
 class RedfishVirtualMediaBoot(base.BootInterface):
@@ -767,7 +781,8 @@ class RedfishVirtualMediaBoot(base.BootInterface):
 
         if node.driver_internal_info.get('is_whole_disk_image'):
             props = []
-
+        elif d_info.get('boot_iso'):
+            props = ['boot_iso']
         elif service_utils.is_glance_image(d_info['image_source']):
             props = ['kernel_id', 'ramdisk_id']
 
diff --git a/ironic/tests/unit/common/test_images.py b/ironic/tests/unit/common/test_images.py
index 437bb41ef0..8a90ab55bb 100644
--- a/ironic/tests/unit/common/test_images.py
+++ b/ironic/tests/unit/common/test_images.py
@@ -911,6 +911,27 @@ class FsImageTestCase(base.TestCase):
             'output_file', 'tmpdir/kernel-uuid', 'tmpdir/ramdisk-uuid',
             configdrive='tmpdir/configdrive', kernel_params=params)
 
+    @mock.patch.object(images, 'create_isolinux_image_for_bios', autospec=True)
+    @mock.patch.object(images, 'fetch', autospec=True)
+    @mock.patch.object(utils, 'tempdir', autospec=True)
+    def test_create_boot_iso_for_existing_iso(self, tempdir_mock,
+                                              fetch_images_mock,
+                                              create_isolinux_mock):
+        mock_file_handle = mock.MagicMock(spec=io.BytesIO)
+        mock_file_handle.__enter__.return_value = 'tmpdir'
+        tempdir_mock.return_value = mock_file_handle
+        base_iso = 'http://fake.local:1234/fake.iso'
+        images.create_boot_iso('ctx', 'output_file', 'kernel-uuid',
+                               'ramdisk-uuid', 'deploy_iso-uuid',
+                               'efiboot-uuid', None,
+                               None, None, 'http://configdrive',
+                               base_iso=base_iso)
+
+        fetch_images_mock.assert_any_call(
+            'ctx', base_iso, 'output_file')
+
+        create_isolinux_mock.assert_not_called()
+
     @mock.patch.object(image_service, 'get_image_service', autospec=True)
     def test_get_glance_image_properties_no_such_prop(self,
                                                       image_service_mock):
diff --git a/ironic/tests/unit/drivers/modules/redfish/test_boot.py b/ironic/tests/unit/drivers/modules/redfish/test_boot.py
index 51177c5ee1..b365eb8307 100644
--- a/ironic/tests/unit/drivers/modules/redfish/test_boot.py
+++ b/ironic/tests/unit/drivers/modules/redfish/test_boot.py
@@ -340,7 +340,8 @@ class RedfishVirtualMediaBootTestCase(db_base.DbTestCase):
 
             url = redfish_boot._prepare_iso_image(
                 task, 'http://kernel/img', 'http://ramdisk/img',
-                'http://bootloader/img', root_uuid=task.node.uuid)
+                'http://bootloader/img', root_uuid=task.node.uuid,
+                base_iso=None)
 
             object_name = 'boot-%s' % task.node.uuid
 
@@ -352,7 +353,8 @@ class RedfishVirtualMediaBootTestCase(db_base.DbTestCase):
                 boot_mode='uefi', esp_image_href='http://bootloader/img',
                 configdrive_href=mock.ANY,
                 kernel_params='nofb nomodeset vga=normal',
-                root_uuid='1be26c0b-03f2-4d2e-ae87-c02d7f33c123')
+                root_uuid='1be26c0b-03f2-4d2e-ae87-c02d7f33c123',
+                base_iso=None)
 
             self.assertEqual(expected_url, url)
 
@@ -381,7 +383,8 @@ class RedfishVirtualMediaBootTestCase(db_base.DbTestCase):
                 boot_mode=None, esp_image_href=None,
                 configdrive_href=mock.ANY,
                 kernel_params='nofb nomodeset vga=normal',
-                root_uuid='1be26c0b-03f2-4d2e-ae87-c02d7f33c123')
+                root_uuid='1be26c0b-03f2-4d2e-ae87-c02d7f33c123',
+                base_iso=None)
 
             self.assertEqual(expected_url, url)
 
@@ -397,14 +400,39 @@ class RedfishVirtualMediaBootTestCase(db_base.DbTestCase):
 
             redfish_boot._prepare_iso_image(
                 task, 'http://kernel/img', 'http://ramdisk/img',
-                bootloader_href=None, root_uuid=task.node.uuid)
+                bootloader_href=None, root_uuid=task.node.uuid,
+                base_iso=None)
 
             mock_create_boot_iso.assert_called_once_with(
                 mock.ANY, mock.ANY, 'http://kernel/img', 'http://ramdisk/img',
                 boot_mode=None, esp_image_href=None,
                 configdrive_href=mock.ANY,
                 kernel_params=kernel_params,
-                root_uuid='1be26c0b-03f2-4d2e-ae87-c02d7f33c123')
+                root_uuid='1be26c0b-03f2-4d2e-ae87-c02d7f33c123',
+                base_iso=None)
+
+    @mock.patch.object(redfish_boot, '_publish_image', autospec=True)
+    @mock.patch.object(images, 'create_boot_iso', autospec=True)
+    def test__prepare_iso_image_boot_iso(
+            self, mock_create_boot_iso, mock__publish_image):
+        with task_manager.acquire(self.context, self.node.uuid,
+                                  shared=True) as task:
+
+            task.node.instance_info = {'boot_iso': 'http://host/boot.iso',
+                                       'capabilities': {
+                                           'boot_option': 'ramdisk'}}
+
+            redfish_boot._prepare_iso_image(
+                task, None, None, root_uuid=None,
+                base_iso='http://host/boot.iso')
+
+            mock_create_boot_iso.assert_called_once_with(
+                mock.ANY, mock.ANY, None, None,
+                boot_mode=None, esp_image_href=None,
+                configdrive_href=None,
+                kernel_params=None,
+                root_uuid=None,
+                base_iso='http://host/boot.iso')
 
     @mock.patch.object(redfish_boot, '_prepare_iso_image', autospec=True)
     def test__prepare_deploy_iso(self, mock__prepare_iso_image):
@@ -474,7 +502,30 @@ class RedfishVirtualMediaBootTestCase(db_base.DbTestCase):
 
             mock__prepare_iso_image.assert_called_once_with(
                 mock.ANY, 'http://kernel/img', 'http://ramdisk/img',
-                'bootloader', root_uuid=task.node.uuid)
+                'bootloader', root_uuid=task.node.uuid, base_iso=None)
+
+    @mock.patch.object(redfish_boot, '_prepare_iso_image', autospec=True)
+    @mock.patch.object(images, 'create_boot_iso', autospec=True)
+    def test__prepare_boot_iso_user_supplied(self, mock_create_boot_iso,
+                                             mock__prepare_iso_image):
+        with task_manager.acquire(self.context, self.node.uuid,
+                                  shared=True) as task:
+            task.node.driver_info.update(
+                {'deploy_kernel': 'kernel',
+                 'deploy_ramdisk': 'ramdisk',
+                 'bootloader': 'bootloader'}
+            )
+
+            task.node.instance_info.update(
+                {'boot_iso': 'http://boot/iso'})
+
+            redfish_boot._prepare_boot_iso(
+                task, root_uuid=task.node.uuid)
+
+            mock__prepare_iso_image.assert_called_once_with(
+                mock.ANY, None, None,
+                'bootloader', root_uuid=task.node.uuid,
+                base_iso='http://boot/iso')
 
     @mock.patch.object(redfish_utils, 'parse_driver_info', autospec=True)
     @mock.patch.object(deploy_utils, 'validate_image_properties',
@@ -534,6 +585,64 @@ class RedfishVirtualMediaBootTestCase(db_base.DbTestCase):
             mock_validate_image_properties.assert_called_once_with(
                 mock.ANY, mock.ANY, mock.ANY)
 
+    @mock.patch.object(redfish_utils, 'parse_driver_info', autospec=True)
+    @mock.patch.object(deploy_utils, 'validate_image_properties',
+                       autospec=True)
+    @mock.patch.object(boot_mode_utils, 'get_boot_mode_for_deploy',
+                       autospec=True)
+    def test_validate_bios_boot_iso(self, mock_get_boot_mode,
+                                    mock_validate_image_properties,
+                                    mock_parse_driver_info):
+        with task_manager.acquire(self.context, self.node.uuid,
+                                  shared=True) as task:
+            task.node.instance_info.update(
+                {'boot_iso': 'http://localhost/file.iso'}
+            )
+
+            task.node.driver_info.update(
+                {'deploy_kernel': 'kernel',
+                 'deploy_ramdisk': 'ramdisk',
+                 'bootloader': 'bootloader'}
+            )
+            # NOTE(TheJulia): Boot mode doesn't matter for this
+            # test scenario.
+            mock_get_boot_mode.return_value = 'bios'
+
+            task.driver.boot.validate(task)
+
+            mock_validate_image_properties.assert_called_once_with(
+                mock.ANY, mock.ANY, mock.ANY)
+
+    @mock.patch.object(redfish_utils, 'parse_driver_info', autospec=True)
+    @mock.patch.object(deploy_utils, 'validate_image_properties',
+                       autospec=True)
+    @mock.patch.object(boot_mode_utils, 'get_boot_mode_for_deploy',
+                       autospec=True)
+    def test_validate_bios_boot_iso_conflicting_image_source(
+            self, mock_get_boot_mode,
+            mock_validate_image_properties,
+            mock_parse_driver_info):
+        with task_manager.acquire(self.context, self.node.uuid,
+                                  shared=True) as task:
+            task.node.instance_info.update(
+                {'boot_iso': 'http://localhost/file.iso',
+                 'image_source': 'http://localhost/file.img'}
+            )
+
+            task.node.driver_info.update(
+                {'deploy_kernel': 'kernel',
+                 'deploy_ramdisk': 'ramdisk',
+                 'bootloader': 'bootloader'}
+            )
+            # NOTE(TheJulia): Boot mode doesn't matter for this
+            # test scenario.
+            mock_get_boot_mode.return_value = 'bios'
+
+            task.driver.boot.validate(task)
+
+            mock_validate_image_properties.assert_called_once_with(
+                mock.ANY, mock.ANY, mock.ANY)
+
     @mock.patch.object(redfish_utils, 'parse_driver_info', autospec=True)
     @mock.patch.object(deploy_utils, 'validate_image_properties',
                        autospec=True)
@@ -841,6 +950,85 @@ class RedfishVirtualMediaBootTestCase(db_base.DbTestCase):
 
             mock_boot_mode_utils.sync_boot_mode.assert_called_once_with(task)
 
+    @mock.patch.object(redfish_boot.RedfishVirtualMediaBoot,
+                       'clean_up_instance', autospec=True)
+    @mock.patch.object(redfish_boot, '_prepare_boot_iso', autospec=True)
+    @mock.patch.object(redfish_boot, '_eject_vmedia', autospec=True)
+    @mock.patch.object(redfish_boot, '_insert_vmedia', autospec=True)
+    @mock.patch.object(redfish_boot, '_parse_driver_info', autospec=True)
+    @mock.patch.object(redfish_boot, 'manager_utils', autospec=True)
+    @mock.patch.object(redfish_boot, 'deploy_utils', autospec=True)
+    @mock.patch.object(redfish_boot, 'boot_mode_utils', autospec=True)
+    def test_prepare_instance_ramdisk_boot_iso(
+            self, mock_boot_mode_utils, mock_deploy_utils, mock_manager_utils,
+            mock__parse_driver_info, mock__insert_vmedia, mock__eject_vmedia,
+            mock__prepare_boot_iso, mock_clean_up_instance):
+
+        with task_manager.acquire(self.context, self.node.uuid,
+                                  shared=True) as task:
+            task.node.provision_state = states.DEPLOYING
+            task.node.driver_internal_info[
+                'root_uuid_or_disk_id'] = self.node.uuid
+            task.node.instance_info = {'boot_iso': 'http://host/boot.iso'}
+
+            mock_deploy_utils.get_boot_option.return_value = 'ramdisk'
+
+            mock__prepare_boot_iso.return_value = 'image-url'
+
+            task.driver.boot.prepare_instance(task)
+
+            mock__prepare_boot_iso.assert_called_once_with(task)
+
+            mock__eject_vmedia.assert_called_once_with(
+                task, sushy.VIRTUAL_MEDIA_CD)
+
+            mock__insert_vmedia.assert_called_once_with(
+                task, 'image-url', sushy.VIRTUAL_MEDIA_CD)
+
+            mock_manager_utils.node_set_boot_device.assert_called_once_with(
+                task, boot_devices.CDROM, persistent=True)
+
+            mock_boot_mode_utils.sync_boot_mode.assert_called_once_with(task)
+
+    @mock.patch.object(redfish_boot.RedfishVirtualMediaBoot,
+                       'clean_up_instance', autospec=True)
+    @mock.patch.object(redfish_boot, '_prepare_boot_iso', autospec=True)
+    @mock.patch.object(redfish_boot, '_eject_vmedia', autospec=True)
+    @mock.patch.object(redfish_boot, '_insert_vmedia', autospec=True)
+    @mock.patch.object(redfish_boot, '_parse_driver_info', autospec=True)
+    @mock.patch.object(redfish_boot, 'manager_utils', autospec=True)
+    @mock.patch.object(redfish_boot, 'deploy_utils', autospec=True)
+    @mock.patch.object(redfish_boot, 'boot_mode_utils', autospec=True)
+    def test_prepare_instance_ramdisk_boot_iso_boot(
+            self, mock_boot_mode_utils, mock_deploy_utils, mock_manager_utils,
+            mock__parse_driver_info, mock__insert_vmedia, mock__eject_vmedia,
+            mock__prepare_boot_iso, mock_clean_up_instance):
+
+        with task_manager.acquire(self.context, self.node.uuid,
+                                  shared=True) as task:
+            task.node.provision_state = states.DEPLOYING
+            i_info = task.node.instance_info
+            i_info['boot_iso'] = "super-magic"
+            task.node.instance_info = i_info
+            mock_deploy_utils.get_boot_option.return_value = 'ramdisk'
+
+            mock__prepare_boot_iso.return_value = 'image-url'
+
+            task.driver.boot.prepare_instance(task)
+
+            mock__prepare_boot_iso.assert_called_once_with(task)
+
+            mock__eject_vmedia.assert_called_once_with(
+                task, sushy.VIRTUAL_MEDIA_CD)
+
+            mock__insert_vmedia.assert_called_once_with(
+                task, 'image-url', sushy.VIRTUAL_MEDIA_CD)
+
+            mock_manager_utils.node_set_boot_device.assert_called_once_with(
+                task, boot_devices.CDROM, persistent=True)
+
+            mock_boot_mode_utils.sync_boot_mode.assert_called_once_with(task)
+
     @mock.patch.object(redfish_boot, '_eject_vmedia', autospec=True)
     @mock.patch.object(redfish_boot, '_cleanup_iso_image', autospec=True)
     @mock.patch.object(redfish_boot, 'manager_utils', autospec=True)
diff --git a/ironic/tests/unit/drivers/modules/test_deploy_utils.py b/ironic/tests/unit/drivers/modules/test_deploy_utils.py
index c474f5b1b2..0307fd8d24 100644
--- a/ironic/tests/unit/drivers/modules/test_deploy_utils.py
+++ b/ironic/tests/unit/drivers/modules/test_deploy_utils.py
@@ -1397,6 +1397,20 @@ class ValidateImagePropertiesTestCase(db_base.DbTestCase):
                                   inst_info, ['kernel', 'ramdisk'])
         self.assertEqual(expected_error, str(error))
 
+    def test_validate_image_properties_boot_iso_conflict(self):
+        instance_info = {
+            'image_source': 'http://ubuntu',
+            'boot_iso': 'http://ubuntu.iso',
+        }
+        expected_error = ("An 'image_source' and 'boot_iso' "
+                          "parameter may not be specified at "
+                          "the same time.")
+        error = self.assertRaises(exception.InvalidParameterValue,
+                                  utils.validate_image_properties,
+                                  self.context,
+                                  instance_info, [])
+        self.assertEqual(expected_error, str(error))
+
 
 class ValidateParametersTestCase(db_base.DbTestCase):
 
diff --git a/releasenotes/notes/add-redfish-boot_iso-pass-through-8a6f4d0c98ada1d5.yaml b/releasenotes/notes/add-redfish-boot_iso-pass-through-8a6f4d0c98ada1d5.yaml
new file mode 100644
index 0000000000..8239910201
--- /dev/null
+++ b/releasenotes/notes/add-redfish-boot_iso-pass-through-8a6f4d0c98ada1d5.yaml
@@ -0,0 +1,8 @@
+---
+features:
+  - |
+    Adds functionality to allow a user to supply a node
+    ``instance_info/boot_iso`` parameter on machines utilizing the
+    ``redfish-virtual-media`` boot interface. When combined with the
+    ``ramdisk`` deployment interface, this allows an instance to boot
+    into a user supplied ISO image.