cisco.ios.ios_vlans mtu bug for state replaced and overridden on the Catalyst 9k platform

[jiholland]

SUMMARY

The cisco.ios.ios_vlans resource module fails with state replaced and overridden for Catalyst 9k devices running IOS-XE when altering or deleting vlans because it tries to execute the none-existing vlan configuration command no mtu 1500.

ISSUE TYPE

• Bug Report

COMPONENT NAME

cisco.ios.ios_vlans

ANSIBLE VERSION

ansible [core 2.18.0]
  config file = /home/jiholland/ansible.cfg
  configured module search path = ['/home/jiholland/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /home/jiholland/.venv/lib/python3.12/site-packages/ansible
  ansible collection location = /home/jiholland/collections:/home/jiholland/.ansible/collections
  executable location = /home/jiholland/.venv/bin/ansible
  python version = 3.12.7 (main, Oct  7 2024, 08:37:53) [GCC 11.4.1 20231218 (Red Hat 11.4.1-3)] (/home/jiholland/.venv/bin/python3)
  jinja version = 3.1.4
  libyaml = True

COLLECTION VERSION

Collection Version
---------- -------
cisco.ios  9.0.3 

CONFIGURATION

ANSIBLE_COW_SELECTION(/home/jiholland/ansible-playbooks/ansible.cfg) = small
CALLBACKS_ENABLED(/home/jiholland/ansible-playbooks/ansible.cfg) = ['community.general.log_plays']
CONFIG_FILE() = /home/jiholland/ansible-playbooks/ansible.cfg
DEFAULT_FORKS(/home/jiholland/ansible-playbooks/ansible.cfg) = 20
DISPLAY_SKIPPED_HOSTS(/home/jiholland/ansible-playbooks/ansible.cfg) = False
HOST_KEY_CHECKING(/home/jiholland/ansible-playbooks/ansible.cfg) = False

OS / ENVIRONMENT

Switch Ports Model              SW Version        SW Image              Mode   
------ ----- -----              ----------        ----------            ----   
*    1 65    C9300-48T          17.12.04          CAT9K_IOSXE           INSTALL

STEPS TO REPRODUCE

Execute the provided example playbook on a Catalyst 9k device running IOS-XE 17.X.

---
- name: Replace a vlan.
  hosts: dev-leaf-1
  gather_facts: false

  tasks:

    - name: Replace vlan 20.
      cisco.ios.ios_vlans:
        config:
          - vlan_id: 20
            name: Test_VLAN20
        state: replaced

EXPECTED RESULTS

I expect the module to replace the vlan configuration for the provided vlan(s) in the task.

ACTUAL RESULTS

If the vlan is already present; the module fails because it tries to execute the command no mtu 1500 which is not a valid command in Cisco IOS-XE.

fatal: [dev-leaf-1]: FAILED! => {
    "changed": false,
    "module_stderr": "no mtu 1500\r\nno mtu 1500\r\n    ^\r\n% Invalid input detected at '^' marker.\r\n\r\ndev-leaf-1(config-vlan)#",
    "module_stdout": "",
    "msg": "MODULE FAILURE: No start of json char found\nSee stdout/stderr for the exact error"
}

[roverflow]

@jiholland This issue is being actively worked on, thanks for reporting!