Need to document the need to use new nic-config templates for osp13. Previous releases could use nic-config templates from even earlier releases. In OSP13 it's no longer possible, so have to use the new format.
The nic-config files have been changed between osp12 to osp13. For users that already have the old OSP12 version of nic-config files, we have a script that helps users to convert the nic-config files to the newer versions which needed for OSP13 deployment. /usr/share/openstack-tripleo-heat-templates/tools/yaml-nic-config-2-script.py
This content has been significantly revised including steps for Jinja2 templates. See the following revised/new sections: https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/13/html/advanced_overcloud_customization/basic-network-isolation https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/13/html/advanced_overcloud_customization/custom-composable-networks https://access.redhat.com/documentation/en-us/red_hat_openstack_platform/13/html/advanced_overcloud_customization/custom-network-interface-templates