fix ios_l2_interface (#37389)

Signed-off-by: Trishna Guha <trishnaguha17@gmail.com>

lib/ansible/modules/network/ios/ios_l2_interface.py

@@ -185,9 +185,12 @@ def remove_switchport_config_commands(name, existing, proposed, module):
             commands.append(command)
 
     elif mode == 'trunk':
-        tv_check = existing.get('trunk_vlans_list') == proposed.get('trunk_vlans_list')
+        # Supported Remove Scenarios for trunk_vlans_list
-
+        # 1) Existing: 1,2,3 Proposed: 1,2,3 - Remove all
-        if not tv_check:
+        # 2) Existing: 1,2,3 Proposed: 1,2   - Remove 1,2 Leave 3
+        # 3) Existing: 1,2,3 Proposed: 2,3   - Remove 2,3 Leave 1
+        # 4) Existing: 1,2,3 Proposed: 4,5,6 - None removed.
+        # 5) Existing: None  Proposed: 1,2,3 - None removed.
         existing_vlans = existing.get('trunk_vlans_list')
         proposed_vlans = proposed.get('trunk_vlans_list')
         vlans_to_remove = set(proposed_vlans).intersection(existing_vlans)
@@ -291,7 +294,7 @@ def vlan_range_to_list(vlans):
     result = []
     if vlans:
         for part in vlans.split(','):
-            if part == 'none':
+            if part.lower() == 'none':
                 break
             if '-' in part:
                 start, stop = (int(i) for i in part.split('-'))

test/integration/targets/ios_l2_interface/tests/cli/sanity.yaml

@@ -88,23 +88,52 @@
 
   - assert: *false
 
-  - name: Ensure these VLANs are not being tagged on the trunk
+  - name: Remove full trunk vlan range 2-50
     ios_l2_interface: &no_tag
       name: "{{ test_interface }}"
       mode: trunk
-      trunk_vlans: 30-4094
+      trunk_vlans: 2-50
       state: absent
       provider: "{{ cli }}"
     register: result
 
   - assert: *true
 
-  - name: "no tag vlan Idempotence"
+  - name: Check Idempotence Remove full trunk vlan range 2-50
     ios_l2_interface: *no_tag
     register: result
 
   - assert: *false
 
+  - name: Reconfigure interface trunk port and ensure 2-50 are being tagged
+    ios_l2_interface: *tag
+    register: result
+
+  - assert: *true
+
+  - name: Check Idempotence Reconfigure interface trunk port and ensure 2-50 are being tagged
+    ios_l2_interface: *tag
+    register: result
+
+  - assert: *false
+
+  - name: Remove partial trunk vlan range 30-4094 are removed
+    ios_l2_interface: &partial
+      name: "{{ test_interface }}"
+      mode: trunk
+      trunk_vlans: 30-4094
+      state: absent
+      provider: "{{ cli }}"
+    register: result
+
+  - assert: *true
+
+  - name: Check Idempotence Remove partial trunk vlan range 30-4094 are removed
+    ios_l2_interface: *partial
+    register: result
+
+  - assert: *false
+
   - name: put interface default state
     ios_l2_interface: *def_swi
     register: result