{% comment %}
Consolidated Subnets tab navigation: section toggle (Subnets | Shared Networks)
plus a DHCPv4/DHCPv6 family toggle (only when the server runs both protocols).
Context: section, dhcp_version, nav_subnets_url, nav_shared_url, nav_v4_url, nav_v6_url.
{% endcomment %}
<ul class="nav nav-tabs mb-3">
  <li class="nav-item">
    <a class="nav-link{% if section == 'subnets' %} active{% endif %}" href="{{ nav_subnets_url }}">Subnets</a>
  </li>
  <li class="nav-item">
    <a class="nav-link{% if section == 'shared_networks' %} active{% endif %}" href="{{ nav_shared_url }}">Shared Networks</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 %}