Add bridge to InterfaceTemplate

netbox/dcim/models/device_component_templates.py

@@ -350,6 +350,14 @@ class InterfaceTemplate(ModularComponentTemplateModel):
         default=False,
         verbose_name='Management only'
     )
+    bridge = models.ForeignKey(
+        to='self',
+        on_delete=models.SET_NULL,
+        related_name='bridge_interfaces',
+        null=True,
+        blank=True,
+        verbose_name='Bridge interface'
+    )
     poe_mode = models.CharField(
         max_length=50,
         choices=InterfacePoEModeChoices,
@@ -365,6 +373,19 @@ class InterfaceTemplate(ModularComponentTemplateModel):
 
     component_model = Interface
 
+    def clean(self):
+        super().clean()
+
+        if self.bridge:
+            if self.device_type and self.device_type != self.bridge.device_type:
+                raise ValidationError({
+                    'bridge': f"Bridge interface ({self.bridge}) must belong to the same device type"
+                })
+            if self.module_type and self.module_type != self.bridge.module_type:
+                raise ValidationError({
+                    'bridge': f"Bridge interface ({self.bridge}) must belong to the same module type"
+                })
+
     def instantiate(self, **kwargs):
         return self.component_model(
             name=self.resolve_name(kwargs.get('module')),
@@ -385,6 +406,7 @@ class InterfaceTemplate(ModularComponentTemplateModel):
             'mgmt_only': self.mgmt_only,
             'label': self.label,
             'description': self.description,
+            'bridge': self.bridge.name if self.bridge else None,
             'poe_mode': self.poe_mode,
             'poe_type': self.poe_type,
         }

netbox/dcim/models/devices.py

@@ -802,6 +802,15 @@ class Device(PrimaryModel, ConfigContextModel):
                 'vc_position': "A device assigned to a virtual chassis must have its position defined."
             })
 
+    def _update_interface_bridges(self, interface_templates, module=None):
+        for interface_template in interface_templates.exclude(bridge=None):
+            interface = Interface.objects.get(device=self, name=interface_template.resolve_name(module=module))
+
+            if interface_template.bridge:
+                interface.bridge = Interface.objects.get(device=self, name=interface_template.bridge.resolve_name(module=module))
+                interface.full_clean()
+                interface.save()
+
     def _instantiate_components(self, queryset, bulk_create=True):
         """
         Instantiate components for the device from the specified component templates.
@@ -854,6 +863,8 @@ class Device(PrimaryModel, ConfigContextModel):
             self._instantiate_components(self.device_type.devicebaytemplates.all())
             # Disable bulk_create to accommodate MPTT
             self._instantiate_components(self.device_type.inventoryitemtemplates.all(), bulk_create=False)
+            # Interface bridges have to be set after interface instantiation
+            self._update_interface_bridges(self.device_type.interfacetemplates.all())
 
         # Update Site and Rack assignment for any child Devices
         devices = Device.objects.filter(parent_bay__device=self)
@@ -1015,6 +1026,15 @@ class Module(PrimaryModel, ConfigContextModel):
                 f"Module must be installed within a module bay belonging to the assigned device ({self.device})."
             )
 
+    def _update_interface_bridges(self, interface_templates, module=None):
+        for interface_template in interface_templates.exclude(bridge=None):
+            interface = Interface.objects.get(device=self.device, name=interface_template.resolve_name(module=module))
+
+            if interface_template.bridge:
+                interface.bridge = Interface.objects.get(device=self.device, name=interface_template.bridge.resolve_name(module=module))
+                interface.full_clean()
+                interface.save()
+
     def save(self, *args, **kwargs):
         is_new = self.pk is None
 
@@ -1090,6 +1110,9 @@ class Module(PrimaryModel, ConfigContextModel):
                     update_fields=update_fields
                 )
 
+        # Interface bridges have to be set after interface instantiation
+        self._update_interface_bridges(self.module_type.interfacetemplates, self)
+
 
 #
 # Virtual chassis