kubespray/roles/network_plugin/calico/tasks/reset.yml

---
- name: reset | check dummy0 network device
  stat:
    path: /sys/class/net/dummy0
  register: dummy0

- name: reset | remove the network device created by calico
  command: ip link del dummy0
  when: dummy0.stat.exists

- name: reset | get remaining routes set by bird
  command: ip route show proto bird
  register: bird_routes

- name: reset | remove remaining routes set by bird
  command: "ip route del {{ bird_route }} proto bird"
  with_items: "{{ bird_routes.stdout_lines }}"
  loop_control:
    loop_var: bird_route