Increment MAC address in ansible

Question

I have a mac address with me. Let's suppose

00:ae:cd:09:db:4f

I need to create a loop in which each time this mac address is incremented by value 1. Let's say the loop will be iterated 2 times.

Expected output:

00:ae:cd:09:db:50
00:ae:cd:09:db:51

I need to create a list of the output.

I tried ipmath(1), tried converting to different format using hwdaddr() and other lib. But did not got any luck. Please help !!

Answer 1

Use with_sequence. For example,

- hosts: localhost

  vars:

    mac: 00:ae:cd:09:db:4f
    count: 2
    macs: []

  tasks:

    - set_fact:
        macs: "{{ macs + [new|join(':')] }}"
      with_sequence: count="{{ count }}"
      vars:
        arr: "{{ mac.split(':') }}"
        ar5: "{{ '%02x' % (arr.5|int(base=16) + item|int) }}"
        new: "{{ arr[:5] + [ar5] }}"

    - debug:
        var: macs

gives (abridged)

  macs:
  - 00:ae:cd:09:db:50
  - 00:ae:cd:09:db:51