Also include vminterface.html

netbox/dcim/models/device_components.py

@@ -732,6 +732,25 @@ 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

@@ -616,6 +616,7 @@ class BaseInterfaceTable(NetBoxTable):
     )
     primary_mac_address = tables.Column(
         verbose_name=_('MAC Address'),
+        accessor=Accessor('mac_address_display'),
         linkify=True
     )
 

netbox/templates/dcim/interface.html

@@ -143,9 +143,11 @@
           <tr>
             <th scope="row">{% trans "MAC Address" %}</th>
             <td>
-              {% if object.primary_mac_address %}
-                <span class="font-monospace">{{ object.primary_mac_address|linkify }}</span>
-                <span class="badge text-bg-primary">{% trans "Primary" %}</span>
+              {% 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 %}
               {% else %}
                 {{ ''|placeholder }}
               {% endif %}

netbox/templates/virtualization/vminterface.html

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