dcnm_network: multicast_group_address not configured when set

[dariomi]

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Ansible Version and collection version

ansible-core 2.5.16
dcnm collection: 3.9.1

DCNM version

• V 4.1.1g

Affected module(s)

• dcnm_network

Ansible Playbook

- name: Query MCAST_IP Resource
  cisco.dcnm.dcnm_resource_manager:
    state: query
    fabric: "{{ fabric }}"
    config:
      - entity_name: VRF_{{ data.vrf_name }}
  loop: "{{ fabric_names }}"
  loop_control:
    loop_var: fabric
  register: mcast_query

- name: Build network config (unicast-routing enabled)
  ansible.builtin.set_fact:
    network_config:
      - net_name: "{{ data.net_name }}"
        vlan_name: "{{ data.vlan_name | default(data.net_name, true) }}"
        vlan_id: "{{ data.vlan_id }}"
        arp_suppress: "{{ data.arp_suppress }}"
        vrf_name: "{{ data.vrf_name }}"
        multicast_group_address: "{{ mcast_query.results[0].response[0].allocatedIp }}"
        gw_ip_subnet: "{{ data.svi_gateway | default(omit, true) }}"
        attach: "{{ switch_ips }}"
        net_template: Default_Network_Universal
        net_extension_template: Default_Network_Extension_Universal
        deploy: false

- name: ND Network
  cisco.dcnm.dcnm_network:
    fabric: "{{ data.fabric_name }}"
    state: "{{ state }}"
    config: "{{ network_config }}"
  register: network_response

Debug Output

https://gist.github.com/dariomi/37d259227b25bfe3a87061def6fb5662

Expected Behavior

Network is configured with provided multicast_group_address.

Actual Behavior

Network is configured without provided multicast_group_address.

Steps to Reproduce

1. Use dcnm_network to configure a network with a static multicast_group_address.
2. Review output returned from dcnm_network task -> multicast_group_address not set

References

[dariomi]

This is for a fabric-group (previously known as MSD).
I did see the conditional in the code but this behaviour is not described and for me its not clear why MSD should not have static mcast_group_address assigned.

        if self.is_ms_fabric is True:
            template_conf.pop("mcastGroup")

[miguecor]

@dariomi NDFC Multi-Site Domains (or Fabric Groups in 4.1), does not need a mcastGroup because that's a VXLAN EVPN site specific property. The multicast group is used as the ingress-replication mechanism on a VXLAN EVPN fabric. The ingress-replication mechanism can be set differently in multiple fabrcs without affecting the inter-site comunition. And finally, there's no option in NDFC for a MSD fabric (or Fabric Group) to configure a mcastGroup.

[miguecor]

@allenrobel / @mikewiebe, I think this issue can be closed.