diff --git a/ci/roles/trunk/tasks/main.yml b/ci/roles/trunk/tasks/main.yml
index c48a1734..b82e559b 100644
--- a/ci/roles/trunk/tasks/main.yml
+++ b/ci/roles/trunk/tasks/main.yml
@@ -53,7 +53,7 @@
       - ip_address: 10.5.6.55
   register: subport
 
-- name: Create trunk
+- name: Create trunk without subports
   openstack.cloud.trunk:
     cloud: "{{ cloud }}"
     state: present
@@ -61,15 +61,17 @@
     port: "{{ parent_port_name }}"
   register: trunk
 
-- debug: var=trunk
+- name: Display return values of trunk module
+  ansible.builtin.debug:
+    var: trunk
 
-- name: assert return values of trunk module
-  assert:
+- name: Assert return values of trunk module
+  ansible.builtin.assert:
     that:
       # allow new fields to be introduced but prevent fields from being removed
       - expected_fields|difference(trunk.trunk.keys())|length == 0
 
-- name: Add subport to trunk
+- name: Add subport to trunk by name
   openstack.cloud.trunk:
     cloud: "{{ cloud }}"
     state: present
@@ -79,14 +81,66 @@
       - port: "{{ subport_name }}"
         segmentation_type: vlan
         segmentation_id: 123
+  register: trunk_subport_by_name
 
-- name: Update subport from trunk
+- name: Assert the subport is part of the trunk
+  ansible.builtin.assert:
+    that:
+      - trunk_subport_by_name.trunk.sub_ports|length == 1
+
+- name: Remove subport from trunk
   openstack.cloud.trunk:
     cloud: "{{ cloud }}"
     state: present
     name: "{{ trunk_name }}"
     port: "{{ parent_port_name }}"
     sub_ports: []
+  register: trunk_subport_removed
+
+- name: Assert no subports are part of the trunk
+  ansible.builtin.assert:
+    that:
+      - trunk_subport_removed.trunk.sub_ports|length == 0
+
+- name: Add subport to trunk by ID
+  openstack.cloud.trunk:
+    cloud: "{{ cloud }}"
+    state: present
+    name: "{{ trunk_name }}"
+    port: "{{ parent_port_name }}"
+    sub_ports:
+      - port: "{{ subport.port.id }}"
+        segmentation_type: vlan
+        segmentation_id: 123
+  register: trunk_subport_by_id
+
+- name: Assert the subport is part of the trunk
+  ansible.builtin.assert:
+    that:
+      - trunk_subport_by_id.trunk.sub_ports|length == 1
+
+- name: Delete trunk
+  openstack.cloud.trunk:
+    cloud: "{{ cloud }}"
+    state: absent
+    name: "{{ trunk_name }}"
+
+- name: Create trunk without subports
+  openstack.cloud.trunk:
+    cloud: "{{ cloud }}"
+    state: present
+    name: "{{ trunk_name }}"
+    port: "{{ parent_port_name }}"
+    sub_ports:
+      - port: "{{ subport.port.id }}"
+        segmentation_type: vlan
+        segmentation_id: 123
+  register: trunk_with_subports
+
+- name: Assert the subport is part of the trunk
+  ansible.builtin.assert:
+    that:
+      - trunk_with_subports.trunk.sub_ports|length == 1
 
 - name: Delete trunk
   openstack.cloud.trunk:
diff --git a/plugins/modules/trunk.py b/plugins/modules/trunk.py
index 4d918e24..b7dbe187 100644
--- a/plugins/modules/trunk.py
+++ b/plugins/modules/trunk.py
@@ -201,6 +201,11 @@ class TrunkModule(OpenStackModule):
         if state == 'present' and not trunk:
             # create trunk
             trunk = self._create(name_or_id, port)
+
+            # add sub ports
+            update = self._build_update(trunk, sub_ports)
+            trunk = self._update(trunk, update)
+
             self.exit_json(changed=True,
                            trunk=trunk.to_dict(computed=False))
         elif state == 'present' and trunk:
@@ -232,7 +237,7 @@ class TrunkModule(OpenStackModule):
             if found is False:
                 psp = self.params['sub_ports'] or []
                 for k in psp:
-                    if sp['name'] == k['port']:
+                    if sp['name'] == k['port'] or sp['id'] == k['port']:
                         spobj = {
                             'port_id': sp['id'],
                             'segmentation_type': k['segmentation_type'],