feat(dcim): Show peer connections for LAG members

Add `InterfaceLAGMemberTable` for the LAG Members panel on
LAG interface detail views. The table includes the parent device,
member interface/type, and a peer column which renders
connected endpoints (including the peer LAG when present).

Fixes #19869

netbox/dcim/models/device_components.py

@@ -732,25 +732,6 @@ class BaseInterface(models.Model):
         if self.primary_mac_address:
             return self.primary_mac_address.mac_address
 
-    @property
-    def mac_address_display(self):
-        """
-        Rich representation of MAC addresses for use in table columns (e.g. InterfaceTable).
-        Handles various configurations of MAC addresses for an interface:
-        11:22:33:44:55:66      <-- Single MAC address on interface, assigned as primary
-        11:22:33:44:55:66 (2)  <-- Multiple MAC addresses on interface, one assigned as primary
-        2 available            <-- 1 or more MAC addresses on interface, none assigned as primary
-        -                      <-- No MAC addresses on interface
-        """
-        available_mac_count = self.mac_addresses.count()
-        if self.primary_mac_address:
-            if available_mac_count > 1:
-                return f"{self.primary_mac_address} ({available_mac_count})"
-            return self.primary_mac_address
-        if available_mac_count:
-            return f"{available_mac_count} available"
-        return None
-
 
 class Interface(
     InterfaceValidationMixin,

netbox/dcim/tables/devices.py

@@ -27,6 +27,7 @@ __all__ = (
     'DeviceTable',
     'FrontPortTable',
     'InterfaceTable',
+    'InterfaceLAGMemberTable',
     'InventoryItemRoleTable',
     'InventoryItemTable',
     'MACAddressTable',
@@ -616,7 +617,6 @@ class BaseInterfaceTable(NetBoxTable):
     )
     primary_mac_address = tables.Column(
         verbose_name=_('MAC Address'),
-        accessor=Accessor('mac_address_display'),
         linkify=True
     )
 
@@ -690,6 +690,33 @@ class InterfaceTable(BaseInterfaceTable, ModularDeviceComponentTable, PathEndpoi
         default_columns = ('pk', 'name', 'device', 'label', 'enabled', 'type', 'description')
 
 
+class InterfaceLAGMemberTable(PathEndpointTable, NetBoxTable):
+    parent = tables.Column(
+        verbose_name=_('Parent'),
+        accessor=Accessor('device'),
+        linkify=True,
+    )
+    name = tables.Column(
+        verbose_name=_('Name'),
+        linkify=True,
+        order_by=('_name',),
+    )
+    connection = columns.TemplateColumn(
+        accessor='connected_endpoints',
+        template_code=INTERFACE_LAG_MEMBERS_LINKTERMINATION,
+        verbose_name=_('Peer'),
+        orderable=False,
+    )
+    tags = columns.TagColumn(
+        url_name='dcim:interface_list'
+    )
+
+    class Meta(NetBoxTable.Meta):
+        model = models.Interface
+        fields = ('pk', 'parent', 'name', 'type', 'connection')
+        default_columns = ('pk', 'parent', 'name', 'type', 'connection')
+
+
 class DeviceInterfaceTable(InterfaceTable):
     name = tables.TemplateColumn(
         verbose_name=_('Name'),

netbox/dcim/tables/template_code.py

@@ -24,6 +24,24 @@ INTERFACE_LINKTERMINATION = """
 {% else %}""" + LINKTERMINATION + """{% endif %}
 """
 
+INTERFACE_LAG_MEMBERS_LINKTERMINATION = """
+{% for termination in value %}
+  {% if termination.parent_object %}
+    <a href="{{ termination.parent_object.get_absolute_url }}">{{ termination.parent_object }}</a>
+    <i class="mdi mdi-chevron-right"></i>
+  {% endif %}
+  <a href="{{ termination.get_absolute_url }}">{{ termination }}</a>
+  {% if termination.lag %}
+    <i class="mdi mdi-chevron-right"></i>
+    <a href="{{ termination.lag.get_absolute_url }}">{{ termination.lag }}</a>
+    <span class="text-muted">(LAG)</span>
+  {% endif %}
+  {% if not forloop.last %}<br />{% endif %}
+{% empty %}
+  {{ ''|placeholder }}
+{% endfor %}
+"""
+
 CABLE_LENGTH = """
 {% load helpers %}
 {% if record.length %}{{ record.length|floatformat:"-2" }} {{ record.length_unit }}{% endif %}

netbox/dcim/views.py

@@ -3135,6 +3135,14 @@ class InterfaceView(generic.ObjectView):
         )
         child_interfaces_table.configure(request)
 
+        # Get LAG interfaces
+        lag_interfaces = Interface.objects.restrict(request.user, 'view').filter(lag=instance)
+        lag_interfaces_table = tables.InterfaceLAGMemberTable(
+            lag_interfaces,
+            orderable=False
+        )
+        lag_interfaces_table.configure(request)
+
         # Get assigned VLANs and annotate whether each is tagged or untagged
         vlans = []
         if instance.untagged_vlan is not None:
@@ -3164,6 +3172,7 @@ class InterfaceView(generic.ObjectView):
             'bridge_interfaces': bridge_interfaces,
             'bridge_interfaces_table': bridge_interfaces_table,
             'child_interfaces_table': child_interfaces_table,
+            'lag_interfaces_table': lag_interfaces_table,
             'vlan_table': vlan_table,
             'vlan_translation_table': vlan_translation_table,
         }

netbox/templates/dcim/interface.html

@@ -143,11 +143,9 @@
           <tr>
             <th scope="row">{% trans "MAC Address" %}</th>
             <td>
-              {% if object.mac_address_display %}
-                <span class="font-monospace">{{ object.mac_address_display|linkify }}</span>
-                {% if object.primary_mac_address %}
-                  <span class="badge text-bg-primary">{% trans "Primary" %}</span>
-                {% endif %}
+              {% if object.primary_mac_address %}
+                <span class="font-monospace">{{ object.primary_mac_address|linkify }}</span>
+                <span class="badge text-bg-primary">{% trans "Primary" %}</span>
               {% else %}
                 {{ ''|placeholder }}
               {% endif %}
@@ -372,33 +370,6 @@
           </table>
         </div>
       {% endif %}
-      {% if object.is_lag %}
-        <div class="card">
-          <h2 class="card-header">{% trans "LAG Members" %}</h2>
-          <table class="table table-hover">
-            <thead>
-              <tr>
-                <th>{% trans "Parent" %}</th>
-                <th>{% trans "Interface" %}</th>
-                <th>{% trans "Type" %}</th>
-              </tr>
-            </thead>
-            <tbody>
-              {% for member in object.member_interfaces.all %}
-                <tr>
-                  <td>{{ member.device|linkify }}</td>
-                  <td>{{ member|linkify }}</td>
-                  <td>{{ member.get_type_display }}</td>
-                </tr>
-              {% empty %}
-                <tr>
-                  <td colspan="3" class="text-muted">{% trans "No member interfaces" %}</td>
-                </tr>
-              {% endfor %}
-            </tbody>
-          </table>
-        </div>
-      {% endif %}
       {% include 'ipam/inc/panels/fhrp_groups.html' %}
       {% include 'dcim/inc/panels/inventory_items.html' %}
       {% plugin_right_page object %}
@@ -443,6 +414,13 @@
       {% include 'inc/panel_table.html' with table=vlan_table heading="VLANs" %}
     </div>
   </div>
+  {% if object.is_lag %}
+    <div class="row mb-3">
+      <div class="col col-md-12">
+        {% include 'inc/panel_table.html' with table=lag_interfaces_table heading="LAG Members" %}
+      </div>
+    </div>
+  {% endif %}
   {% if object.vlan_translation_policy %}
     <div class="row mb-3">
       <div class="col col-md-12">

netbox/templates/virtualization/vminterface.html

@@ -78,11 +78,9 @@
         <tr>
           <th scope="row">{% trans "MAC Address" %}</th>
           <td>
-            {% if object.mac_address_display %}
-              <span class="font-monospace">{{ object.mac_address_display|linkify }}</span>
-              {% if object.primary_mac_address %}
-                <span class="badge text-bg-primary">{% trans "Primary" %}</span>
-              {% endif %}
+            {% if object.mac_address %}
+              <span class="font-monospace">{{ object.mac_address }}</span>
+              <span class="badge text-bg-primary">{% trans "Primary" %}</span>
             {% else %}
               {{ ''|placeholder }}
             {% endif %}