diff --git a/initializers/dcim_interfaces.yml b/initializers/dcim_interfaces.yml
index 4030530..4db416f 100644
--- a/initializers/dcim_interfaces.yml
+++ b/initializers/dcim_interfaces.yml
@@ -8,6 +8,15 @@
 ##
 ## Examples:
 
+# - device: server01
+#   name: ath0
+#   type: 1000base-t
+#   lag: ae0
+#   bridge: br0
+# - device: server01
+#   name: ath1
+#   type: 1000base-t
+#   parent: ath0
 # - device: server01
 #   enabled: true
 #   type: virtual
diff --git a/startup_scripts/210_dcim_interfaces.py b/startup_scripts/210_dcim_interfaces.py
index b217f3b..6e57e73 100644
--- a/startup_scripts/210_dcim_interfaces.py
+++ b/startup_scripts/210_dcim_interfaces.py
@@ -15,10 +15,17 @@ if interfaces is None:
 
 match_params = ["device", "name"]
 required_assocs = {"device": (Device, "name")}
+related_assocs = {
+    "bridge": (Interface, "name"),
+    "lag": (Interface, "name"),
+    "parent": (Interface, "name"),
+}
 
 for params in interfaces:
     custom_field_data = pop_custom_fields(params)
 
+    related_interfaces = {k: params.pop(k, None) for k in related_assocs}
+
     for assoc, details in required_assocs.items():
         model, field = details
         query = {field: params.pop(assoc)}
@@ -29,6 +36,35 @@ for params in interfaces:
     interface, created = Interface.objects.get_or_create(**matching_params, defaults=defaults)
 
     if created:
-        print("🧷 Created interface", interface.name, interface.device.name)
+        print(f"🧷 Created interface {interface} on {interface.device}")
 
     set_custom_fields_values(interface, custom_field_data)
+
+    for related_field, related_value in related_interfaces.items():
+        if not related_value:
+            continue
+
+        r_model, r_field = related_assocs[related_field]
+
+        if related_field == "parent" and not interface.parent_id:
+            query = {r_field: related_value, "device": interface.device}
+            try:
+                related_obj = r_model.objects.get(**query)
+            except Interface.DoesNotExist:
+                print(f"⚠️ Could not find parent interface with: {query} for interface {interface}")
+                raise
+
+            interface.parent_id = related_obj.id
+            interface.save()
+            print(
+                f"🧷 Attached interface {interface} on {interface.device} "
+                f"to parent {related_obj}"
+            )
+        else:
+            query = {r_field: related_value, "device": interface.device, "type": related_field}
+            related_obj, rel_obj_created = r_model.objects.get_or_create(**query)
+
+            if rel_obj_created:
+                setattr(interface, f"{related_field}_id", related_obj.id)
+                interface.save()
+                print(f"🧷 Created {related_field} interface {interface} on {interface.device}")