Cert-manager accepts only short-hand IPv6 addresses. 

**Workaround**: You must use the following rules when defining IPv6 addresses
to be used by Cert-manager. 

-  all letters must be in lower case

-  each group of hexadecimal values must not have any leading 0s
   (use :12: instead of :0012:)

-  the longest sequence of consecutive all-zero fields must be short-handed
   with ``::``
    
-  ``::`` must not be used to short-hand an IPv6 address with 7 groups of hexadecimal
    values, use :0: instead of ``::``

.. note::

    Use the rules above to set the IPv6 address related to the management
    and |OAM| network in the Ansible bootstrap overrides file, localhost.yml.

.. code-block:: none

    apiVersion: cert-manager.io/v1
    kind: Certificate
    metadata:
        name: oidc-auth-apps-certificate
        namespace: test
    spec:
        secretName: oidc-auth-apps-certificate
        dnsNames:
        - ahost.com
        ipAddresses:
        - fe80:12:903a:1c1a:e802::11e4
        issuerRef:
            name: cloudplatform-interca-issuer
            kind: Issuer