netbox/netbox/templates/dcim/interface_edit.html

{% extends 'generic/object_edit.html' %}
{% load form_helpers %}

{% block form %}
    <div class="field-group my-5">
        <div class="row mb-2">
          <h5 class="offset-sm-3">Interface</h5>
        </div>
        {% if form.instance.device %}
            <div class="row mb-3">
                <label class="col-sm-3 col-form-label text-lg-end required" for="id_device">Device</label>
                <div class="col">
                    <input class="form-control" value="{{ form.instance.device }}" disabled />
                </div>
            </div>
        {% endif %}
        {% render_field form.name %}
        {% render_field form.label %}
        {% render_field form.type %}
        {% render_field form.parent %}
        {% render_field form.lag %}
        {% render_field form.mac_address %}
        {% render_field form.wwn %}
        {% render_field form.mtu %}
        {% render_field form.description %}
        {% render_field form.tags %}
        {% render_field form.enabled %}
        {% render_field form.mgmt_only %}
        {% render_field form.mark_connected %}
    </div>

    {% if form.instance.is_wireless %}
        <div class="field-group my-5">
            <div class="row mb-2">
              <h5 class="offset-sm-3">Wireless</h5>
            </div>
            {% render_field form.rf_role %}
            {% render_field form.rf_channel %}
            {% render_field form.rf_channel_width %}
            {% render_field form.wireless_lans %}
        </div>
    {% endif %}

    <div class="field-group my-5">
        <div class="row mb-2">
          <h5 class="offset-sm-3">802.1Q Switching</h5>
        </div>
        {% render_field form.mode %}
        {% render_field form.vlan_group %}
        {% render_field form.untagged_vlan %}
        {% render_field form.tagged_vlans %}
    </div>

    {% if form.custom_fields %}
      <div class="field-group my-5">
        <div class="row mb-2">
          <h5 class="offset-sm-3">Custom Fields</h5>
        </div>
        {% render_custom_fields form %}
      </div>
    {% endif %}
{% endblock %}

{% block buttons %}
    <a href="{{ return_url }}" class="btn btn-outline-danger">Cancel</a>
    {% if obj.pk %}
        <button type="submit" formaction="?return_url={% url 'dcim:interface_edit' pk=obj.pk %}" class="btn btn-outline-primary">Save & Continue Editing</button>
        <button type="submit" name="_update" class="btn btn-primary">Save</button>
    {% else %}
        <button type="submit" name="_addanother" class="btn btn-outline-primary">Create & Add Another</button>
        <button type="submit" name="_create" class="btn btn-primary">Create</button>
    {% endif %}
{% endblock %}