connectivity.j2

{#  Jinja2 template to create a connectivity graph from neighbor information
    Copyright (C) 2018  Erik Auerswald <auerswal@unix-ag.uni-kl.de>

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
-#}
{# the keyword 'strict' automatically removes duplicate edges -#}
strict graph network_connectivity {
{% for router in ansible_play_hosts %}
{% set r = router|regex_replace('-oob') %}
    "{{r}}" [shape=record,label="{{r}}
    {%- for n in hostvars[router].cdp_neighbors -%}
    {%- set ifname = n.LOCAL_IF|regex_replace('^(..)[^0-9]*([0-9/.]*)$','\\1\\2') -%}
    |<{{n.LOCAL_IF}}> {{ifname}}
    {%- endfor -%}
    "];
{% endfor %}
{% for router in ansible_play_hosts %}
{% set r = router|regex_replace('-oob') %}
{%   for neigh in hostvars[router].cdp_neighbors %}
    "{{r}}":"{{neigh.LOCAL_IF}}" -- "{{neigh.NEIGHBOR}}":"{{neigh.REMOTE_IF}}";
{%   endfor %}
{% endfor %}
}