Missing interfaces with dellos6_facts

[chucks0]

SUMMARY

When using dellos6_facts to populate ansible_net_interfaces for a Dell N3048 switch stack, the results are inconsistent.

ISSUE TYPE

• Bug Report

COMPONENT NAME

dellos6_facts

ANSIBLE VERSION

ansible 2.10.7
  config file = /home/user/.ansible.cfg
  configured module search path = ['/home/user/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /home/user/.local/lib/python3.8/site-packages/ansible
  executable location = /home/user/.local/bin/ansible
  python version = 3.8.5 (default, Jan 27 2021, 15:41:15) [GCC 9.3.0]

CONFIGURATION

DEFAULT_FORKS(/home/user/.ansible.cfg) = 10
DEFAULT_HOST_LIST(/home/user/.ansible.cfg) = ['/home/user/ansible/inventories']
HOST_KEY_CHECKING(/home/user/.ansible.cfg) = False

OS / ENVIRONMENT

Machine Description............... Dell EMC Networking Switch
System Model ID................... N3048EP-ON
Machine Type...................... Dell EMC Networking N3048EP-ON
Image File........................ N3000Advv6.6.3.33

STEPS TO REPRODUCE

Execute a playlist that gathers interface information using dellos6_facts module

---
- hosts: sw1
  connection: network_cli
  gather_facts: no
  become: yes
  become_method: enable

  tasks:
  - name: Gather Dell OS6 Device Facts
    dellos6_facts:
      gather_subset: interfaces

  - debug: var=ansible_net_interfaces

  - debug: var="{{ ansible_net_interfaces|length }}"

EXPECTED RESULTS

ansible_net_intefaces should be populated with the complete list of interfaces on the switch stack. The output should include all interfaces as well as the proper count of interfaces on the switch stack.

ACTUAL RESULTS

The results are inconsistent. With small switch stacks (1 or 2 switches), sometimes all interfaces are returned correctly but usually only vlan 1 is returned. With larger switch stacks, the full list is never returned and only vlan 1 is listed.

ok: [sw1] => {
    "ansible_net_interfaces": {
        "Vl1": [
            {
                "address": "10.1.1.1",
                "masklen": "255.0.0.0"
            }
        ]
    }
}
ok: [sw1] => {
    "1": "1"
}

[chucks0]

I did a little testing and it appears that self.responses[0] is an empty string in the populate function of the Interfaces class of os6_facts.py whenever things aren't working correctly. The issue appears to be with the output that is being returned from the 'show interfaces' command being large. If I modify 'show interfaces' to be 'show interfaces | include Interface' instead, the complete list is returned every time. Of course that breaks other things since the rest of the information can't be parsed.