Unable to Merge a vlan to a Trunk Port

[Kniickk]

SUMMARY

ISSUE TYPE

• Bug Report

COMPONENT NAME

cisco.ios.ios_l2_interfaces

ANSIBLE VERSION

ansible [core 2.15.3]
  config file = /etc/ansible/ansible.cfg
  configured module search path = ['/root/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python3.11/site-packages/ansible
  ansible collection location = /root/.ansible/collections:/usr/share/ansible/collections
  executable location = /bin/ansible
  python version = 3.11.5 (main, Oct 25 2023, 16:19:59) [GCC 8.5.0 20210514 (Red Hat 8.5.0-20)] (/usr/bin/python3.11)
  jinja version = 3.1.2
  libyaml = True

COLLECTION VERSION

# /root/.ansible/collections/ansible_collections
Collection Version
---------- -------
cisco.ios  9.0.0

# /usr/lib/python3.11/site-packages/ansible_collections
Collection Version
---------- -------
cisco.ios  4.6.1

CONFIGURATION

CONFIG_FILE() = /etc/ansible/ansible.cfg
HOST_KEY_CHECKING(/etc/ansible/ansible.cfg) = False
PERSISTENT_COMMAND_TIMEOUT(/etc/ansible/ansible.cfg) = 60

OS / ENVIRONMENT

OS: Rocky Linux 8
Device: Cisco 3850
IOS Version: 16.12.11

STEPS TO REPRODUCE

I created a Port-channel on the Switch, the Port-Channel should be a trunk Port with a VLAN 10.
After that i want to add the VLAN 15 on the same Trunk Port, but the config will be overridden, not merged.

---
- name: adding_new_vlan
  hosts: Distribution_Switche
  vars_files:
    - /etc/ansible/vault/VAULT_FILE.yaml

  tasks:
  - name: Adding VLAN to Switch
    cisco.ios.ios_vlans:
      config:
        - name: VLAN0015
          vlan_id: 15
          state: active

  - name: Adding VLAN to Port-Channel ABM
    cisco.ios.ios_l2_interfaces:
      config:
       - name: Port-Channel30
         mode: trunk
         trunk: 
           allowed_vlans: 10
      state: merged

EXPECTED RESULTS

I was expecting that the playbook adds the VLAN to the already created via the "switchport trunk allowed vlan add" command.

ACTUAL RESULTS

But the VLAN config is always replaced with the VLANs i write in the "allowed_vlans:" part.