{% comment %}
Config tab navigation: section toggle (Server Options | Option Definitions) plus a
DHCPv4/DHCPv6 family toggle (only when the server runs both protocols).
Context: config_section, dhcp_version, nav_options_url, nav_optiondef_url, nav_v4_url, nav_v6_url.
{% endcomment %}
<ul class="nav nav-tabs mb-3">
  <li class="nav-item">
    <a class="nav-link{% if config_section == 'options' %} active{% endif %}" href="{{ nav_options_url }}">Server Options</a>
  </li>
  <li class="nav-item">
    <a class="nav-link{% if config_section == 'option_def' %} active{% endif %}" href="{{ nav_optiondef_url }}">Option Definitions</a>
  </li>
</ul>
{% if object.dhcp4 and object.dhcp6 %}
<ul class="nav nav-pills justify-content-center mb-3">
  <li class="nav-item">
    <a class="nav-link{% if dhcp_version == 4 %} active{% endif %}" href="{{ nav_v4_url }}">DHCPv4</a>
  </li>
  <li class="nav-item">
    <a class="nav-link{% if dhcp_version == 6 %} active{% endif %}" href="{{ nav_v6_url }}">DHCPv6</a>
  </li>
</ul>
{% endif %}