# when clause
---
- name: IOS Command Output
  hosts: all
  gather_facts: false
  connection: network_cli
  tasks:
    - name: show hostname
      ios_command:
        commands:
          - show run | i hostname
      register: output
      
    - name: show output with when conditions
      when: '"R1" in "{{ output.stdout }}"'
      debug:
        msg: "{{ output }}"