ansible.utils.ipsubnet_filter.rst

ansible.utils.ipsubnet

This filter can be used to manipulate network subnets in several ways.

Version added: 2.5.0

Synopsis

• This filter can be used to manipulate network subnets in several ways.

Parameters

Parameter	Choices/Defaults	Configuration	Comments
index integer			The second argument of the ipsubnet() filter is an index number; by specifying it you can get a new subnet with the specified index.
query string	Default: ""		You can provide query as 1st argument. To check if a given string is a subnet, pass it through the filter without any arguments. If the given string is an IP address, it will be converted into a subnet. If you specify a subnet size as the first parameter of the ipsubnet() filter, and the subnet size is smaller than the current one, you will get the number of subnets a given subnet can be split into.
value string / required			subnets or individual address or any other values input for ipsubnet plugin

Examples

#### examples
# Ipsubnet filter plugin with different queries.
vars:
  address: 192.168.144.5
  subnet: 192.168.0.0/16
  ipv6_address: '2001:4860:4860::8888'
  ipv6_subnet: '2600:1f1c:1b3:8f00::/56'
tasks:
  - name: convert IP address to subnet
    debug:
      msg: '{{ address | ansible.utils.ipsubnet }}'
  - name: check if a given string is a subnet
    debug:
      msg: '{{ subnet | ansible.utils.ipsubnet }}'
  - name: Get the number of subnets a given subnet can be split into.
    debug:
      msg: '{{ subnet | ansible.utils.ipsubnet(20) }}'
  - name: Get a 1st subnet
    debug:
      msg: '{{ subnet | ansible.utils.ipsubnet(20, 0) }}'
  - name: Get a last subnet
    debug:
      msg: '{{ subnet | ansible.utils.ipsubnet(20, -1) }}'
  - name: Get first IPv6 subnet that has prefix length /120
    debug:
      msg: '{{ ipv6_subnet | ansible.utils.ipsubnet(120, 0) }}'
  - name: Get last subnet that has prefix length /120
    debug:
      msg: '{{ ipv6_subnet | ansible.utils.ipsubnet(120, -1) }}'
  - name: Get biggest subnet that contains that given IP address.
    debug:
      msg: '{{ address | ansible.utils.ipsubnet(20) }}'
  - name: Get 1st smaller subnet by specifying 0 as index number
    debug:
      msg: '{{ address | ansible.utils.ipsubnet(18, 0) }}'
  - name: Get last subnet
    debug:
      msg: '{{ address | ansible.utils.ipsubnet(18, -1) }}'
  - name: >-
      The rank of the IP in the subnet (the IP is the 36870nth /32 of the
      subnet)
    debug:
      msg: '{{ address | ansible.utils.ipsubnet(subnet) }}'
  - name: The rank in the /24 that contain the address
    debug:
      msg: '{{ address | ansible.utils.ipsubnet(''192.168.144.0/24'') }}'
  - name: An IP with the subnet in the first /30 in a /24
    debug:
      msg: '{{ ''192.168.144.1/30'' | ansible.utils.ipsubnet(''192.168.144.0/24'') }}'
  - name: The fifth subnet /30 in a /24
    debug:
      msg: '{{ ''192.168.144.16/30'' | ansible.utils.ipsubnet(''192.168.144.0/24'') }}'


# PLAY [Ipsubnet filter plugin with different queries.] ****************************************************************
# TASK [convert IP address to subnet] *************************************************************************
# task path: /Users/amhatre/ansible-collections/playbooks/test_ipsubnet.yaml:10
# Loading collection ansible.utils from /Users/amhatre/ansible-collections/collections/ansible_collections/ansible/utils
# ok: [localhost] => {
#     "msg": "192.168.144.5/32"
# }
#
# TASK [check if a given string is a subnet] ******************************************************************
# task path: /Users/amhatre/ansible-collections/playbooks/test_ipsubnet.yaml:15
# Loading collection ansible.utils from /Users/amhatre/ansible-collections/collections/ansible_collections/ansible/utils
# ok: [localhost] => {
#     "msg": "192.168.0.0/16"
# }
#
# TASK [Get the number of subnets a given subnet can be split into.] ******************************************
# task path: /Users/amhatre/ansible-collections/playbooks/test_ipsubnet.yaml:20
# Loading collection ansible.utils from /Users/amhatre/ansible-collections/collections/ansible_collections/ansible/utils
# ok: [localhost] => {
#     "msg": "16"
# }
#
# TASK [Get a 1st subnet] *************************************************************************************
# task path: /Users/amhatre/ansible-collections/playbooks/test_ipsubnet.yaml:25
# Loading collection ansible.utils from /Users/amhatre/ansible-collections/collections/ansible_collections/ansible/utils
# ok: [localhost] => {
#     "msg": "192.168.0.0/20"
# }
#
# TASK [Get a last subnet] ************************************************************************************
# task path: /Users/amhatre/ansible-collections/playbooks/test_ipsubnet.yaml:30
# Loading collection ansible.utils from /Users/amhatre/ansible-collections/collections/ansible_collections/ansible/utils
# ok: [localhost] => {
#     "msg": "192.168.240.0/20"
# }
#
# TASK [Get biggest subnet that contains that given IP address.] **********************************************
# task path: /Users/amhatre/ansible-collections/playbooks/test_ipsubnet.yaml:35
# Loading collection ansible.utils from /Users/amhatre/ansible-collections/collections/ansible_collections/ansible/utils
# ok: [localhost] => {
#     "msg": "192.168.144.0/20"
# }
#
# TASK [Get 1st smaller subnet by specifying 0 as index number] ***********************************************
# task path: /Users/amhatre/ansible-collections/playbooks/test_ipsubnet.yaml:40
# Loading collection ansible.utils from /Users/amhatre/ansible-collections/collections/ansible_collections/ansible/utils
# ok: [localhost] => {
#     "msg": "192.168.128.0/18"
# }
#
# TASK [Get last subnet] **************************************************************************************
# task path: /Users/amhatre/ansible-collections/playbooks/test_ipsubnet.yaml:45
# Loading collection ansible.utils from /Users/amhatre/ansible-collections/collections/ansible_collections/ansible/utils
# ok: [localhost] => {
#     "msg": "192.168.144.4/31"
# }
#
# TASK [The rank of the IP in the subnet (the IP is the 36870nth /32 of the subnet)] **************************
# task path: /Users/amhatre/ansible-collections/playbooks/test_ipsubnet.yaml:50
# Loading collection ansible.utils from /Users/amhatre/ansible-collections/collections/ansible_collections/ansible/utils
# ok: [localhost] => {
#     "msg": "36870"
# }
#
# TASK [The rank in the /24 that contain the address] *********************************************************
# task path: /Users/amhatre/ansible-collections/playbooks/test_ipsubnet.yaml:55
# Loading collection ansible.utils from /Users/amhatre/ansible-collections/collections/ansible_collections/ansible/utils
# ok: [localhost] => {
#     "msg": "6"
# }
#
# TASK [An IP with the subnet in the first /30 in a /24] ******************************************************
# task path: /Users/amhatre/ansible-collections/playbooks/test_ipsubnet.yaml:60
# Loading collection ansible.utils from /Users/amhatre/ansible-collections/collections/ansible_collections/ansible/utils
# ok: [localhost] => {
#     "msg": "1"
# }
#
# TASK [he fifth subnet /30 in a /24] *************************************************************************
# task path: /Users/amhatre/ansible-collections/playbooks/test_ipsubnet.yaml:65
# Loading collection ansible.utils from /Users/amhatre/ansible-collections/collections/ansible_collections/ansible/utils
# ok: [localhost] => {
#     "msg": "5"
# }

Return Values

Common return values are documented here, the following are the fields unique to this filter:

Key	Returned	Description
data raw		Returns values valid for a particular query.

Status

Authors

• Ashwini Mhatre (@amhatre)

Hint

Configuration entries for each entry type have a low to high priority order. For example, a variable that is lower in the list will override a variable that is higher up.